9fss

RNA Polymerase III Class III Open Mini Pre-Initiation complex 2 (OC2-mini)

Method: ELECTRON MICROSCOPY

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1. Protein Identity and Related Structures Protein Identity & Related Structures

DNA-directed RNA polymerase III subunit RPC1

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPC1_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–1390； UniProt 1–1390

DNA-directed RNA polymerase III subunit RPC2

OrganismNot specified

UniProt Q9NW08

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPC2_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–1133； UniProt 1–1133

DNA-directed RNA polymerase III subunit RPC3

OrganismNot specified

UniProt Q9BUI4

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPC3_HUMAN
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–534； UniProt 1–534

DNA-directed RNA polymerase III subunit RPC4

OrganismNot specified

UniProt P05423

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPC4_HUMAN
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain D； PDBConstruct 1–398； UniProt 1–398

DNA-directed RNA polymerase III subunit RPC5

OrganismNot specified

UniProt Q9NVU0

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPC5_HUMAN
Isoform	—
PDB entities	5
Chains and sequence ranges	Author chain E； PDBConstruct 1–708； UniProt 1–708

DNA-directed RNA polymerase III subunit RPC6

OrganismNot specified

UniProt Q9H1D9

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPC6_HUMAN
Isoform	—
PDB entities	6
Chains and sequence ranges	Author chain F； PDBConstruct 1–316； UniProt 1–316

DNA-directed RNA polymerase III subunit RPC7

OrganismNot specified

UniProt O15318

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPC7_HUMAN
Isoform	—
PDB entities	7
Chains and sequence ranges	Author chain G； PDBConstruct 1–223； UniProt 1–223

DNA-directed RNA polymerase III subunit RPC8

OrganismNot specified

UniProt Q9Y535

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPC8_HUMAN
Isoform	—
PDB entities	8
Chains and sequence ranges	Author chain H； PDBConstruct 1–204； UniProt 1–204

DNA-directed RNA polymerase III subunit RPC9

OrganismNot specified

UniProt O75575

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPC9_HUMAN
Isoform	—
PDB entities	9
Chains and sequence ranges	Author chain I； PDBConstruct 1–148； UniProt 1–148

DNA-directed RNA polymerase III subunit RPC10

OrganismNot specified

UniProt Q9Y2Y1

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPC10_HUMAN
Isoform	—
PDB entities	10
Chains and sequence ranges	Author chain J； PDBConstruct 1–108； UniProt 1–108

DNA-directed RNA polymerases I and III subunit RPAC1

OrganismNot specified

UniProt O15160

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPAC1_HUMAN
Isoform	—
PDB entities	11
Chains and sequence ranges	Author chain K； PDBConstruct 1–346； UniProt 1–346

DNA-directed RNA polymerases I and III subunit RPAC2

OrganismNot specified

UniProt P0DPB6

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPAC2_HUMAN
Isoform	—
PDB entities	12
Chains and sequence ranges	Author chain L； PDBConstruct 1–133； UniProt 1–133

DNA-directed RNA polymerases I, II, and III subunit RPABC1

OrganismNot specified

UniProt P19388

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPAB1_HUMAN
Isoform	—
PDB entities	13
Chains and sequence ranges	Author chain M； PDBConstruct 1–210； UniProt 1–210

DNA-directed RNA polymerases I, II, and III subunit RPABC2

OrganismNot specified

UniProt P61218

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPAB2_HUMAN
Isoform	—
PDB entities	14
Chains and sequence ranges	Author chain N； PDBConstruct 1–127； UniProt 1–127

DNA-directed RNA polymerases I, II, and III subunit RPABC3

OrganismNot specified

UniProt P52434

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPAB3_HUMAN
Isoform	—
PDB entities	15
Chains and sequence ranges	Author chain O； PDBConstruct 1–150； UniProt 1–150

DNA-directed RNA polymerases I, II, and III subunit RPABC4

OrganismNot specified

UniProt P53803

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPAB4_HUMAN
Isoform	—
PDB entities	16
Chains and sequence ranges	Author chain P； PDBConstruct 1–58； UniProt 1–58

DNA-directed RNA polymerases I, II, and III subunit RPABC5

OrganismNot specified

UniProt P62875

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RPAB5_HUMAN
Isoform	—
PDB entities	17
Chains and sequence ranges	Author chain Q； PDBConstruct 1–67； UniProt 1–67

TATA-box-binding protein

Homo sapiens

UniProt P20226

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TBP_HUMAN
Isoform	—
PDB entities	18
Chains and sequence ranges	Author chain R； PDBConstruct 20–200； UniProt 159–339

Transcription factor IIIB 50 kDa subunit

Homo sapiens

UniProt Q9HAW0

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BRF2_HUMAN
Isoform	—
PDB entities	19
Chains and sequence ranges	Author chain S； PDBConstruct 1–419； UniProt 1–419

;Transcription factor TFIIIB component B'' homolog ;

Homo sapiens

UniProt A6H8Y1

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BDP1_HUMAN
Isoform	—
PDB entities	20
Chains and sequence ranges	Author chain T； PDBConstruct 1–484； UniProt 1–484

snRNA-activating protein complex subunit 1

Homo sapiens

UniProt Q16533

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SNPC1_HUMAN
Isoform	—
PDB entities	21
Chains and sequence ranges	Author chain U； PDBConstruct 1–368； UniProt 1–368

snRNA-activating protein complex subunit 4

Homo sapiens

UniProt Q5SXM2

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） U6_2_Template × 1 U6_2_Non template × 1 snRNA-activating protein complex subunit 3 × 1 （Q92966） ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SNPC4_HUMAN
Isoform	—
PDB entities	22
Chains and sequence ranges	Author chain W； PDBConstruct 41–1508； UniProt 2–1469

snRNA-activating protein complex subunit 3

Homo sapiens

UniProt Q92966

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 23 DNA 2	DNA-directed RNA polymerase III subunit RPC1 × 1 （O14802） DNA-directed RNA polymerase III subunit RPC2 × 1 （Q9NW08） DNA-directed RNA polymerase III subunit RPC3 × 1 （Q9BUI4） DNA-directed RNA polymerase III subunit RPC4 × 1 （P05423） DNA-directed RNA polymerase III subunit RPC5 × 1 （Q9NVU0） DNA-directed RNA polymerase III subunit RPC6 × 1 （Q9H1D9） DNA-directed RNA polymerase III subunit RPC7 × 1 （O15318） DNA-directed RNA polymerase III subunit RPC8 × 1 （Q9Y535） DNA-directed RNA polymerase III subunit RPC9 × 1 （O75575） DNA-directed RNA polymerase III subunit RPC10 × 1 （Q9Y2Y1） DNA-directed RNA polymerases I and III subunit RPAC1 × 1 （O15160） DNA-directed RNA polymerases I and III subunit RPAC2 × 1 （P0DPB6） DNA-directed RNA polymerases I, II, and III subunit RPABC1 × 1 （P19388） DNA-directed RNA polymerases I, II, and III subunit RPABC2 × 1 （P61218） DNA-directed RNA polymerases I, II, and III subunit RPABC3 × 1 （P52434） DNA-directed RNA polymerases I, II, and III subunit RPABC4 × 1 （P53803） DNA-directed RNA polymerases I, II, and III subunit RPABC5 × 1 （P62875） TATA-box-binding protein × 1 （P20226） Transcription factor IIIB 50 kDa subunit × 1 （Q9HAW0） ;Transcription factor TFIIIB component B'' homolog ; × 1 （A6H8Y1） snRNA-activating protein complex subunit 1 × 1 （Q16533） snRNA-activating protein complex subunit 4 × 1 （Q5SXM2） U6_2_Template × 1 U6_2_Non template × 1 ZINC ION × 9 MAGNESIUM ION × 1 IRON/SULFUR CLUSTER × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SNPC3_HUMAN
Isoform	—
PDB entities	25
Chains and sequence ranges	Author chain Z； PDBConstruct 1–411； UniProt 1–411

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	9fss
Deposition date deposition_date	2024-06-21
Last revision last_revision	2025-01-15
Structure title title	RNA Polymerase III Class III Open Mini Pre-Initiation complex 2 (OC2-mini)
Keywords keywords	RNA Polymerase III, SNAPc, TFIIIB, snRNA, Transcription; TRANSCRIPTION
Experimental Method method	ELECTRON MICROSCOPY

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

9fss__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

9fss__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9fss__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	69.09 Å
Rg (electron density)	68.55 Å
Total Rg	68.50 Å
Atom count	56344
Residues	6849
Excluded volume	998860 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9fss__assembly_1__model_1`	25-meric （25）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (28)

Entity 1 Entity 1 polymer

Description description	DNA-directed RNA polymerase III subunit RPC1
Molecular weight formula_weight	155860.1 kDa
EC 编号 ec_number	2.7.7.6
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	56344

MVKEQFRETDVAKKISHICFGMKSPEEMRQQAHIQVVSKNLYSQDNQHAPLLYGVLDHRMGTSEKDRPCETCGKNLADCLGHYGYIDLELPCFHVGYFRAVIGILQMICKTCCHIMLSQEEKKQFLDYLKRPGLTYLQKRGLKKKISDKCRKKNICHHCGAFNGTVKKCGLLKIIHEKYKTNKKVVDPIVSNFLQSFETAIEHNKEVEPLLGRAQENLNPLVVLNLFKRIPAEDVPLLLMNPEAGKPSDLILTRLLVPPLCIRPSVVSDLKSGTNEDDLTMKLTEIIFLNDVIKKHRISGAKTQMIMEDWDFLQLQCALYINSELSGIPLNMAPKKWTRGFVQRLKGKQGRFRGNLSGKRVDFSGRTVISPDPNLRIDEVAVPVHVAKILTFPEKVNKANINFLRKLVQNGPEVHPGANFIQQRHTQMKRFLKYGNREKMAQELKYGDIVERHLIDGDVVLFNRQPSLHKLSIMAHLARVKPHRTFRFNECVCTPYNADFDGDEMNLHLPQTEEAKAEALVLMGTKANLVTPRNGEPLIAAIQDFLTGAYLLTLKDTFFDRAKACQIIASILVGKDEKIKVRLPPPTILKPVTLWTGKQIFSVILRPSDDNPVRANLRTKGKQYCGKGEDLCANDSYVTIQNSELMSGSMDKGTLGSGSKNNIFYILLRDWGQNEAADAMSRLARLAPVYLSNRGFSIGIGDVTPGQGLLKAKYELLNAGYKKCDEYIEALNTGKLQQQPGCTAEETLEALILKELSVIRDHAGSACLRELDKSNSPLTMALCGSKGSFINISQMIACVGQQAISGSRVPDGFENRSLPHFEKHSKLPAAKGFVANSFYSGLTPTEFFFHTMAGREGLVDTAVKTAETGYMQRRLVKSLEDLCSQYDLTVRSSTGDIIQFIYGGDGLDPAAMEGKDEPLEFKRVLDNIKAVFPCPSEPALSKNELILTTESIMKKSEFLCCQDSFLQEIKKFIKGVSEKIKKTRDKYGINDNGTTEPRVLYQLDRITPTQVEKFLETCRDKYMRAQMEPGSAVGALCAQSIGEPGTQMTLKTFHFAGVASMNITLGVPRIKEIINASKAISTPIITAQLDKDDDADYARLVKGRIEKTLLGEISEYIEEVFLPDDCFILVKLSLERIRLLRLEVNAETVRYSICTSKLRVKPGDVAVHGEAVVCVTPRENSKSSMYYVLQFLKEDLPKVVVQGIPEVSRAVIHIDEQSGKEKYKLLVEGDNLRAVMATHGVKGTRTTSNNTYEVEKTLGIEAARTTIINEIQYTMVNHGMSIDRRHVMLLSDLMTYKGEVLGITRFGLAKMKESVLMLASFEKTADHLFDAAYFGQKDSVCGVSECIIMGIPMNIGTGLFKLLHKADRDPNPPKRPLIFDTNEFHIPLVT

Entity 2 Entity 2 polymer

Description description	DNA-directed RNA polymerase III subunit RPC2
Molecular weight formula_weight	127953.9 kDa
EC 编号 ec_number	2.7.7.6
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

MDVLAEEFGNLTPEQLAAPIPTVEEKWRLLPAFLKVKGLVKQHIDSFNYFINVEIKKIMKANEKVTSDADPMWYLKYLNIYVGLPDVEESFNVTRPVSPHECRLRDMTYSAPITVDIEYTRGSQRIIRNALPIGRMPIMLRSSNCVLTGKTPAEFAKLNECPLDPGGYFIVKGVEKVILIQEQLSKNRIIVEADRKGAVGASVTSSTHEKKSRTNMAVKQGRFYLRHNTLSEDIPIVIIFKAMGVESDQEIVQMIGTEEHVMAAFGPSLEECQKAQIFTQMQALKYIGNKVRRQRMWGGGPKKTKIEEARELLASTILTHVPVKEFNFRAKCIYTAVMVRRVILAQGDNKVDDRDYYGNKRLELAGQLLSLLFEDLFKKFNSEMKKIADQVIPKQRAAQFDVVKHMRQDQITNGMVNAISTGNWSLKRFKMDRQGVTQVLSRLSYISALGMMTRISSQFEKTRKVSGPRSLQPSQWGMLCPSDTPEGEACGLVKNLALMTHITTDMEDGPIVKLASNLGVEDVNLLCGEELSYPNVFLVFLNGNILGVIRDHKKLVNTFRLMRRAGYINEFVSISTNLTDRCVYISSDGGRLCRPYIIVKKQKPAVTNKHMEELAQGYRNFEDFLHESLVEYLDVNEENDCNIALYEHTINKDTTHLEIEPFTLLGVCAGLIPYPHHNQSPRNTYQCAMGKQAMGTIGYNQRNRIDTLMYLLAYPQKPMVKTKTIELIEFEKLPAGQNATVAVMSYSGYDIEDALVLNKASLDRGFGRCLVYKNAKCTLKRYTNQTFDKVMGPMLDAATRKPIWRHEILDADGICSPGEKVENKQVLVNKSMPTVTQIPLEGSNVPQQPQYKDVPITYKGATDSYIEKVMISSNAEDAFLIKMLLRQTRRPEIGDKFSSRHGQKGVCGLIVPQEDMPFCDSGICPDIIMNPHGFPSRMTVGKLIELLAGKAGVLDGRFHYGTAFGGSKVKDVCEDLVRHGYNYLGKDYVTSGITGEPLEAYIYFGPVYYQKLKHMVLDKMHARARGPRAVLTRQPTEGRSRDGGLRLGEMERDCLIGYGASMLLLERLMISSDAFEVDVCGQCGLLGYSGWCHYCKSSCHVSSLRIPYACKLLFQELQSMNIIPRLKLSKYNE

Entity 3 Entity 3 polymer

Description description	DNA-directed RNA polymerase III subunit RPC3
Molecular weight formula_weight	60692.6 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MTQAEIKLCSLLLQEHFGEIVEKIGVHLIRTGSQPLRVIAHDTGTSLDQVKKALCVLVQHNLVSYQVHKRGVVEYEAQCSRVLRMLRYPRYIYTTKTLYSDTGELIVEELLLNGKLTMSAVVKKVADRLTETMEDGKTMDYAEVSNTFVRLADTHFVQRCPSVPTTENSDPGPPPPAPTLVINEKDMYLVPKLSLIGKGKRRRSSDEDAAGEPKAKRPKYTTDNKEPIPDDGIYWQANLDRFHQHFRDQAIVSAVANRMDQTSSEIVRTMLRMSEITTSSSAPFTQPLSSNEIFRSLPVGYNISKQVLDQYLTLLADDPLEFVGKSGDSGGGMYVINLHKALASLATATLESVVQERFGSRCARIFRLVLQKKHIEQKQVEDFAMIPAKEAKDMLYKMLSENFMSLQEIPKTPDHAPSRTFYLYTVNILSAARMLLHRCYKSIANLIERRQFETKENKRLLEKSQRVEAIIASMQATGAEEAQLQEIEEMITAPERQQLETLKRNVNKLDASEIQVDETIFLLESYIECTMKRQ

Entity 4 Entity 4 polymer

Description description	DNA-directed RNA polymerase III subunit RPC4
Molecular weight formula_weight	44471.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

MSEGNAAGEPSTPGGPRPLLTGARGLIGRRPAPPLTPGRLPSIRSRDLTLGGVKKKTFTPNIISRKIKEEPKEEVTVKKEKRERDRDRQREGHGRGRGRPEVIQSHSIFEQGPAEMMKKKGNWDKTVDVSDMGPSHIINIKKEKRETDEETKQILRMLEKDDFLDDPGLRNDTRNMPVQLPLAHSGWLFKEENDEPDVKPWLAGPKEEDMEVDIPAVKVKEEPRDEEEEAKMKAPPKAARKTPGLPKDVSVAELLRELSLTKEEELLFLQLPDTLPGQPPTQDIKPIKTEVQGEDGQVVLIKQEKDREAKLAENACTLADLTEGQVGKLLIRKSGRVQLLLGKVTLDVTMGTACSFLQELVSVGLGDSRTGEMTVLGHVKHKLVCSPDFESLLDHKHR

Entity 5 Entity 5 polymer

Description description	DNA-directed RNA polymerase III subunit RPC5
Molecular weight formula_weight	80004.0 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E

MANEEDDPVVQEIDVYLAKSLAEKLYLFQYPVRPASMTYDDIPHLSAKIKPKQQKVELEMAIDTLNPNYCRSKGEQIALNVDGACADETSTYSSKLMDKQTFCSSQTTSNTSRYAAALYRQGELHLTPLHGILQLRPSFSYLDKADAKHREREAANEAGDSSQDEAEDDVKQITVRFSRPESEQARQRRVQSYEFLQKKHAEEPWVHLHYYGLRDSRSEHERQYLLCPGSSGVENTELVKSPSEYLMMLMPPSQEEEKDKPVAPSNVLSMAQLRTLPLADQIKILMKNVKVMPFANLMSLLGPSIDSVAVLRGIQKVAMLVQGNWVVKSDILYPKDSSSPHSGVPAEVLCRGRDFVMWKFTQSRWVVRKEVATVTKLCAEDVKDFLEHMAVVRINKGWEFILPYDGEFIKKHPDVVQRQHMLWTGIQAKLEKVYNLVKETMPKKPDAQSGPAGLVCGDQRIQVAKTKAQQNHALLERELQRRKEQLRVPAVPPGVRIKEEPVSEEGEEDEEQEAEEEPMDTSPSGLHSKLANGLPLGRAAGTDSFNGHPPQGCASTPVARELKAFVEATFQRQFVLTLSELKRLFNLHLASLPPGHTLFSGISDRMLQDTVLAAGCKQILVPFPPQTAASPDEQKVFALWESGDMSDQHRQVLLEIFSKNYRVRRNMIQSRLTQECGEDLSKQEVDKVLKDCCVSYGGMWYLKGTVQS

Entity 6 Entity 6 polymer

Description description	DNA-directed RNA polymerase III subunit RPC6
Molecular weight formula_weight	35726.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	F

MAEVKVKVQPPDADPVEIENRIIELCHQFPHGITDQVIQNEMPHIEAQQRAVAINRLLSMGQLDLLRSNTGLLYRIKDSQNAGKMKGSDNQEKLVYQIIEDAGNKGIWSRDIRYKSNLPLTEINKILKNLESKKLIKAVKSVAASKKKVYMLYNLQPDRSVTGGAWYSDQDFESEFVEVLNQQCFKFLQSKAETARESKQNPMIQRNSSFASSHEVWKYICELGISKVELSMEDIETILNTLIYDGKVEMTIIAAKEGTVGSVDGHMKLYRAVNPIIPPTGLVRAPCGLCPVFDDCHEGGEISPSNCIYMTEWLEF

Entity 7 Entity 7 polymer

Description description	DNA-directed RNA polymerase III subunit RPC7
Molecular weight formula_weight	25953.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	G

MAGNKGRGRAAYTFNIEAVGFSKGEKLPDVVLKPPPLFPDTDYKPVPLKTGEGEEYMLALKQELRETMKRMPYFIETPEERQDIERYSKRYMKVYKEEWIPDWRRLPREMMPRNKCKKAGPKPKKAKDAGKGTPLTNTEDVLKKMEELEKRGDGEKSDEENEEKEGSKEKSKEGDDDDDDDAAEQEEYDEEEQEEENDYINSYFEDGDDFGADSDDNMDEATY

Entity 8 Entity 8 polymer

Description description	DNA-directed RNA polymerase III subunit RPC8
Molecular weight formula_weight	22938.8 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	H

MFVLVEMVDTVRIPPWQFERKLNDSIAEELNKKLANKVVYNVGLCICLFDITKLEDAYVFPGDGASHTKVHFRCVVFHPFLDEILIGKIKGCSPEGVHVSLGFFDDILIPPESLQQPAKFDEAEQVWVWEYETEEGAHDLYMDTGEEIRFRVVDESFVDTSPTGPSSADATTSSEELPKKEAPYTLVGSISEPGLGLLSWWTSN

Entity 9 Entity 9 polymer

Description description	DNA-directed RNA polymerase III subunit RPC9
Molecular weight formula_weight	16894.0 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	I

MEVKDANSALLSNYEVFQLLTDLKEQRKESGKNKHSSGQQNLNTITYETLKYISKTPCRHQSPEIVREFLTALKSHKLTKAEKLQLLNHRPVTAVEIQLMVEESEERLTEEQIEALLHTVTSILPAEPEAEQKKNTNSNVAMDEEDPA

Entity 10 Entity 10 polymer

Description description	DNA-directed RNA polymerase III subunit RPC10
Molecular weight formula_weight	12354.1 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	J

MLLFCPGCGNGLIVEEGQRCHRFSCNTCPYVHNITRKVTNRKYPKLKEVDDVLGGAAAWENVDSTAESCPKCEHPRAYFMQLQTRSADEPMTTFYKCCNAQCGHRWRD

Entity 11 Entity 11 polymer

Description description	DNA-directed RNA polymerases I and III subunit RPAC1
Molecular weight formula_weight	39301.7 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	K

MAASQAVEEMRSRVVLGEFGVRNVHTTDFPGNYSGYDDAWDQDRFEKNFRVDVVHMDENSLEFDMVGIDAAIANAFRRILLAEVPTMAVEKVLVYNNTSIVQDEILAHRLGLIPIHADPRLFEYRNQGDEEGTEIDTLQFRLQVRCTRNPHAAKDSSDPNELYVNHKVYTRHMTWIPLGNQADLFPEGTIRPVHDDILIAQLRPGQEIDLLMHCVKGIGKDHAKFSPVATASYRLLPDITLLEPVEGEAAEELSRCFSPGVIEVQEVQGKKVARVANPRLDTFSREIFRNEKLKKVVRLARVRDHYIFSVESTGVLPPDVLVSEAIKVLMGKCRRFLDELDAVQMD

Entity 12 Entity 12 polymer

Description description	DNA-directed RNA polymerases I and III subunit RPAC2
Molecular weight formula_weight	15259.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L

MEEDQELERKISGLKTSMAEGERKTALEMVQAAGTDRHCVTFVLHEEDHTLGNSLRYMIMKNPEVEFCGYTTTHPSESKINLRIQTRGTLPAVEPFQRGLNELMNVCQHVLDKFEASIKDYKDQKASRNESTF

Entity 13 Entity 13 polymer

Description description	DNA-directed RNA polymerases I, II, and III subunit RPABC1
Molecular weight formula_weight	24584.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	M

MDDEEETYRLWKIRKTIMQLCHDRGYLVTQDELDQTLEEFKAQSGDKPSEGRPRRTDLTVLVAHNDDPTDQMFVFFPEEPKVGIKTIKVYCQRMQEENITRALIVVQQGMTPSAKQSLVDMAPKYILEQFLQQELLINITEHELVPEHVVMTKEEVTELLARYKLRENQLPRIQAGDPVARYFGIKRGQVVKIIRPSETAGRYITYRLVQ

Entity 14 Entity 14 polymer

Description description	DNA-directed RNA polymerases I, II, and III subunit RPABC2
Molecular weight formula_weight	14491.0 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	N

MSDNEDNFDGDDFDDVEEDEGLDDLENAEEEGQENVEILPSGERPQANQKRITTPYMTKYERARVLGTRALQIAMCAPVMVELEGETDPLLIAMKELKARKIPIIIRRYLPDGSYEDWGVDELIITD

Entity 15 Entity 15 polymer

Description description	DNA-directed RNA polymerases I, II, and III subunit RPABC3
Molecular weight formula_weight	17162.3 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	O

MAGILFEDIFDVKDIDPEGKKFDRVSRLHCESESFKMDLILDVNIQIYPVDLGDKFRLVIASTLYEDGTLDDGEYNPTDDRPSRADQFEYVMYGKVYRIEGDETSTEAATRLSAYVSYGGLLMRLQGDANNLHGFEVDSRVYLLMKKLAF

Entity 16 Entity 16 polymer

Description description	DNA-directed RNA polymerases I, II, and III subunit RPABC4
Molecular weight formula_weight	7018.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	P

MDTQKDVQPPKQQPMIYICGECHTENEIKSRDPIRCRECGYRIMYKKRTKRLVVFDAR

Entity 17 Entity 17 polymer

Description description	DNA-directed RNA polymerases I, II, and III subunit RPABC5
Molecular weight formula_weight	7655.1 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	Q

MIIPVRCFTCGKIVGNKWEAYLGLLQAEYTEGDALDALGLKRYCCRRMLLAHVDLIEKLLNYAPLEK

Entity 18 Entity 18 polymer

Description description	TATA-box-binding protein
Molecular weight formula_weight	22615.7 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	R

MAHHHHHHVGTLEVLFQGPSGIVPQLQNIVSTVNLGCKLDLKTIALRARNAEYNPKRFAAVIMRIREPRTTALIFSSGKMVCTGAKSEEQSRLAARKYARVVQKLGFPAKFLDFKIQNMVGSCDVKFPIRLEGLVLTHQQFSSYEPELFPGLIYRMIKPRIVLLIFVSGKVVLTGAKVRAEIYEAFENIYPILKGFRKTT

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 19 Entity 19 polymer

Description description	Transcription factor IIIB 50 kDa subunit
Molecular weight formula_weight	46587.4 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	S

MPGRGRCPDCGSTELVEDSHYSQSQLVCSDCGCVVTEGVLTTTFSDEGNLREVTYSRSTGENEQVSRSQQRGLRRVRDLCRVLQLPPTFEDTAVAYYQQAYRHSGIRAARLQKKEVLVGCCVLITCRQHNWPLTMGAICTLLYADLDVFSSTYMQIVKLLGLDVPSLCLAELVKTYCSSFKLFQASPSVPAKYVEDKEKMLSRTMQLVELANETWLVTGRHPLPVITAATFLAWQSLQPADRLSCSLARFCKLANVDLPYPASSRLQELLAVLLRMAEQLAWLRVLRLDKRSVVKHIGDLLQHRQSLVRSAFRDGTAEVETREKEPPGWGQGQGEGEVGNNSLGLPQGKRPASPALLLPPCMLKSPKRICPVPPVSTVTGDENISDSEIEQYLRTPQEVRDFQRAQAARQAATSVPNPP

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 20 Entity 20 polymer

Description description	;Transcription factor TFIIIB component B'' homolog ;
Molecular weight formula_weight	55103.5 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	T

MFRRARLSVKPNVRPGVGARGSTASNPQRGRESPRPPDPATDSASKPAEPTDVPTVDFGGAEPQEKAPRSSTEKTGGDNDVEESSRSSSTVSQRRKRISSTSSLVKSSVSVPSESHPLSTINQEAPQPTATSTKEKQPCSDRYRIYKAQKLREMLKEELRKEKKQWKNKYAINESQRPPDRSKMTMRDFIYYLPDNNPMTSSLEQEKKTEKPSTPVQTREQEGKSTPNAEDNEMEEETDDGPLLVPRVKVAEDGSIILDEESLTVEVLRTKGPCVVEENDPIFERGSTTTYSSFRKNYYSKPWSNKETDMFFLAISMVGTDFSMIGQLFPHRARIEIKNKFKREEKTNGWRIDKAFQEKRPFDFDFFAHLLQKVLAEEEKRKQKSVKNHSLKEKKSTKPRKNVKVKKVACEGVNNDPDESMSSRISDTERSQKDAQTVEEESLTLSREDAEQVALEVDLNQKKRRRKKQDGANELGVNNLLENA

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 21 Entity 21 polymer

Description description	snRNA-activating protein complex subunit 1
Molecular weight formula_weight	43074.5 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	U

MGTPPGLQTDCEALLSRFQETDSVRFEDFTELWRNMKFGTIFCGRMRNLEKNMFTKEALALAWRYFLPPYTFQIRVGALYLLYGLYNTQLCQPKQKIRVALKDWDEVLKFQQDLVNAQHFDAAYIFRKLRLDRAFHFTAMPKLLSYRMKKKIHRAEVTEEFKDPSDRVMKLITSDVLEEMLNVHDHYQNMKHVISVDKSKPDKALSLIKDDFFDNIKNIVLEHQQWHKDRKNPSLKSKTNDGEEKMEGNSQETERCERAESLAKIKSKAFSVVIQASKSRRHRQVKLDSSDSDSASGQGQVKATRKKEKKERLKPAGRKMSLRNKGNVQNIHKEDKPLSLSMPVITEEEENESLSGTEFTASKKRRKH

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Trichoplusia ni

Entity 22 Entity 22 polymer

Description description	snRNA-activating protein complex subunit 4
Molecular weight formula_weight	165124.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	W

MASWSHPQFEKGGGSGGGSWSHPQFEKGGGSENLYFQGSADVDAEREKITQEIKELERILDPGSSGSHVEISESSLESDSEADSLPSEDLDPADPPISEEERWGEASNDEDDPKDKTLPEDPETCLQLNMVYQEVIQEKLAEANLLLAQNREQQEELMRDLAGSKGTKVKDGKSLPPSTYMGHFMKPYFKDKVTGVGPPANEDTREKAAQGIKAFEELLVTKWKNWEKALLRKSVVSDRLQRLLQPKLLKLEYLHQKQSKVSSELERQALEKQGREAEKEIQDINQLPEEALLGNRLDSHDWEKISNINFEGSRSAEEIRKFWQNSEHPSINKQEWSREEEERLQAIAAAHGHLEWQKIAEELGTSRSAFQCLQKFQQHNKALKRKEWTEEEDRMLTQLVQEMRVGSHIPYRRIVYYMEGRDSMQLIYRWTKSLDPGLKKGYWAPEEDAKLLQAVAKYGEQDWFKIREEVPGRSDAQCRDRYLRRLHFSLKKGRWNLKEEEQLIELIEKYGVGHWAKIASELPHRSGSQCLSKWKIMMGKKQGLRRRRRRARHSVRWSSTSSSGSSSGSSGGSSSSSSSSSEEDEPEQAQAGEGDRALLSPQYMVPDMDLWVPARQSTSQPWRGGAGAWLGGPAASLSPPKGSSASQGGSKEASTTAAAPGEETSPVQVPARAHGPVPRSAQASHSADTRPAGAEKQALEGGRRLLTVPVETVLRVLRANTAARSCTQKEQLRQPPLPTSSPGVSSGDSVARSHVQWLRHRATQSGQRRWRHALHRRLLNRRLLLAVTPWVGDVVVPCTQASQRPAVVQTQADGLREQLQQARLASTPVFTLFTQLFHIDTAGCLEVVRERKALPPRLPQAGARDPPVHLLQASSSAQSTPGHLFPNVPAQEASKSASHKGSRRLASSRVERTLPQASLLASTGPRPKPKTVSELLQEKRLQEARAREATRGPVVLPSQLLVSSSVILQPPLPHTPHGRPAPGPTVLNVPLSGPGAPAAAKPGTSGSWQEAGTSAKDKRLSTMQALPLAPVFSEAEGTAPAASQAPALGPGQISVSCPESGLGQSQAPAASRKQGLPEAPPFLPAAPSPTPLPVQPLSLTHIGGPHVATSVPLPVTWVLTAQGLLPVPVPAVVSLPRPAGTPGPAGLLATLLPPLTETRAAQGPRAPALSSSWQPPANMNREPEPSCRTDTPAPPTHALSQSPAEADGSVAFVPGEAQVAREIPEPRTSSHADPPEAEPPWSGRLPAFGGVIPATEPRGTPGSPSGTQEPRGPLGLEKLPLRQPGPEKGALDLEKPPLPQPGPEKGALDLGLLSQEGEAATQQWLGGQRGVRVPLLGSRLPYQPPALCSLRALSGLLLHKKALEHKATSLVVGGEAERPAGALQASLGLVRGQLQDNPAYLLLRARFLAAFTLPALLATLAPQGVRTTLSVPSRVGSESEDEDLLSELELADRDGQPGCTTATCPIQGAPDSGKCSASSCLDTSNDPDDLDVLRTRHARHTRKRRRLVAHHHHHHHHHH

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Trichoplusia ni

Entity 23 Entity 23 polymer

Description description	U6_2_Template
Molecular weight formula_weight	30177.3 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	X

GTGCTGCCGAAGCGAGCACGACTCAAGGGTTACTGTCACACCTATTTTAAGCCCTTCAATCAAATCATCTTTTGGTTAGGATAACTTATGGTCGGTTT

Entity 24 Entity 24 polymer

Description description	U6_2_Non template
Molecular weight formula_weight	30280.4 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	Y

AAACCGACCATAAGTTATCCTAACCAAAAGATGATTTGATTGAAGGGCTTAAAATAGGTGTGACAGTAACCCTTGAGTCGTGCTCGCTTCGGCAGCAC

Entity 25 Entity 25 polymer

Description description	snRNA-activating protein complex subunit 3
Molecular weight formula_weight	46812.6 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	Z

MAEGSRGGPTCSGVGGRQDPVSGSGGCNFPEYELPELNTRAFHVGAFGELWRGRLRGAGDLSLREPPASALPGSQAADSDREDAAVARDLDCSLEAAAELRAVCGLDKLKCLEDGEDPEVIPENTDLVTLGVRKRFLEHREETITIDRACRQETFVYEMESHAIGKKPENSADMIEEGELILSVNILYPVIFHKHKEHKPYQTMLVLGSQKLTQLRDSIRCVSDLQIGGEFSNTPDQAPEHISKDLYKSAFFYFEGTFYNDKRYPECRDLSRTIIEWSESHDRGYGKFQTARMEDFTFNDLCIKLGFPYLYCHQGDCEHVIVITDIRLVHHDDCLDRTLYPLLIKKHWLWTRKCFVCKMYTARWVTNNDSFAPEDPCFFCDVCFRMLHYDSEGNKLGEFLAYPYVDPGTFN

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Trichoplusia ni

Entity 26 Entity 26 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 27 Entity 27 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 28 Entity 28 non-polymer

Description description	IRON/SULFUR CLUSTER
Molecular weight formula_weight	351.6 kDa
Source method src_method	syn
Copy count entity_count	1

▶

Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	—

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	4.14 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	13256

RNA Polymerase III Class III Open Mini Pre-Initiation complex 2 (OC2-mini)

1. Protein Identity and Related Structures Protein Identity & Related Structures

DNA-directed RNA polymerase III subunit RPC1

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

DNA-directed RNA polymerase III subunit RPC2

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

DNA-directed RNA polymerase III subunit RPC3

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

DNA-directed RNA polymerase III subunit RPC4

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

DNA-directed RNA polymerase III subunit RPC5

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

DNA-directed RNA polymerase III subunit RPC6

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

DNA-directed RNA polymerase III subunit RPC7

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

DNA-directed RNA polymerase III subunit RPC8

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

DNA-directed RNA polymerase III subunit RPC9

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

DNA-directed RNA polymerase III subunit RPC10

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer