6w7w

30S-Inactive-low-Mg2+ Class B

Method: ELECTRON MICROSCOPY

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

30S ribosomal protein S4

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 9 RNA 1	16S rRNA × 1 30S ribosomal protein S5 × 1 （P0A7W1） 30S ribosomal protein S6 × 1 （P02358） 30S ribosomal protein S8 × 1 （P0A7W7） 30S ribosomal protein S12 × 1 （P0A7S3） 30S ribosomal protein S15 × 1 （A0A4S5B232） 30S ribosomal protein S16 × 1 （P0A7T3） 30S ribosomal protein S17 × 1 （P0AG63） 30S ribosomal protein S20 × 1 （P0A7U7）	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS4_ECOLI
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 1–206； UniProt 1–206

30S ribosomal protein S5

OrganismNot specified

UniProt P0A7W1

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 9 RNA 1	16S rRNA × 1 30S ribosomal protein S4 × 1 （P0A7V8） 30S ribosomal protein S6 × 1 （P02358） 30S ribosomal protein S8 × 1 （P0A7W7） 30S ribosomal protein S12 × 1 （P0A7S3） 30S ribosomal protein S15 × 1 （A0A4S5B232） 30S ribosomal protein S16 × 1 （P0A7T3） 30S ribosomal protein S17 × 1 （P0AG63） 30S ribosomal protein S20 × 1 （P0A7U7）	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS5_ECOLI
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain D； PDBConstruct 1–167； UniProt 1–167

30S ribosomal protein S6

OrganismNot specified

UniProt P02358

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 9 RNA 1	16S rRNA × 1 30S ribosomal protein S4 × 1 （P0A7V8） 30S ribosomal protein S5 × 1 （P0A7W1） 30S ribosomal protein S8 × 1 （P0A7W7） 30S ribosomal protein S12 × 1 （P0A7S3） 30S ribosomal protein S15 × 1 （A0A4S5B232） 30S ribosomal protein S16 × 1 （P0A7T3） 30S ribosomal protein S17 × 1 （P0AG63） 30S ribosomal protein S20 × 1 （P0A7U7）	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS6_ECOLI
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain E； PDBConstruct 1–135； UniProt 1–135

30S ribosomal protein S8

OrganismNot specified

UniProt P0A7W7

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 9 RNA 1	16S rRNA × 1 30S ribosomal protein S4 × 1 （P0A7V8） 30S ribosomal protein S5 × 1 （P0A7W1） 30S ribosomal protein S6 × 1 （P02358） 30S ribosomal protein S12 × 1 （P0A7S3） 30S ribosomal protein S15 × 1 （A0A4S5B232） 30S ribosomal protein S16 × 1 （P0A7T3） 30S ribosomal protein S17 × 1 （P0AG63） 30S ribosomal protein S20 × 1 （P0A7U7）	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS8_ECOLI
Isoform	—
PDB entities	5
Chains and sequence ranges	Author chain G； PDBConstruct 1–130； UniProt 1–130

30S ribosomal protein S12

OrganismNot specified

UniProt P0A7S3

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 9 RNA 1	16S rRNA × 1 30S ribosomal protein S4 × 1 （P0A7V8） 30S ribosomal protein S5 × 1 （P0A7W1） 30S ribosomal protein S6 × 1 （P02358） 30S ribosomal protein S8 × 1 （P0A7W7） 30S ribosomal protein S15 × 1 （A0A4S5B232） 30S ribosomal protein S16 × 1 （P0A7T3） 30S ribosomal protein S17 × 1 （P0AG63） 30S ribosomal protein S20 × 1 （P0A7U7）	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS12_ECOLI
Isoform	—
PDB entities	6
Chains and sequence ranges	Author chain K； PDBConstruct 1–124； UniProt 1–124

30S ribosomal protein S15

OrganismNot specified

UniProt A0A4S5B232

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 9 RNA 1	16S rRNA × 1 30S ribosomal protein S4 × 1 （P0A7V8） 30S ribosomal protein S5 × 1 （P0A7W1） 30S ribosomal protein S6 × 1 （P02358） 30S ribosomal protein S8 × 1 （P0A7W7） 30S ribosomal protein S12 × 1 （P0A7S3） 30S ribosomal protein S16 × 1 （P0A7T3） 30S ribosomal protein S17 × 1 （P0AG63） 30S ribosomal protein S20 × 1 （P0A7U7）	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A4S5B232_ECOLI
Isoform	—
PDB entities	7
Chains and sequence ranges	Author chain N； PDBConstruct 1–89； UniProt 1–89

30S ribosomal protein S16

OrganismNot specified

UniProt P0A7T3

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 9 RNA 1	16S rRNA × 1 30S ribosomal protein S4 × 1 （P0A7V8） 30S ribosomal protein S5 × 1 （P0A7W1） 30S ribosomal protein S6 × 1 （P02358） 30S ribosomal protein S8 × 1 （P0A7W7） 30S ribosomal protein S12 × 1 （P0A7S3） 30S ribosomal protein S15 × 1 （A0A4S5B232） 30S ribosomal protein S17 × 1 （P0AG63） 30S ribosomal protein S20 × 1 （P0A7U7）	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS16_ECOLI
Isoform	—
PDB entities	8
Chains and sequence ranges	Author chain O； PDBConstruct 1–82； UniProt 1–82

30S ribosomal protein S17

OrganismNot specified

UniProt P0AG63

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 9 RNA 1	16S rRNA × 1 30S ribosomal protein S4 × 1 （P0A7V8） 30S ribosomal protein S5 × 1 （P0A7W1） 30S ribosomal protein S6 × 1 （P02358） 30S ribosomal protein S8 × 1 （P0A7W7） 30S ribosomal protein S12 × 1 （P0A7S3） 30S ribosomal protein S15 × 1 （A0A4S5B232） 30S ribosomal protein S16 × 1 （P0A7T3） 30S ribosomal protein S20 × 1 （P0A7U7）	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS17_ECOLI
Isoform	—
PDB entities	9
Chains and sequence ranges	Author chain P； PDBConstruct 1–84； UniProt 1–84

30S ribosomal protein S20

OrganismNot specified

UniProt P0A7U7

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 9 RNA 1	16S rRNA × 1 30S ribosomal protein S4 × 1 （P0A7V8） 30S ribosomal protein S5 × 1 （P0A7W1） 30S ribosomal protein S6 × 1 （P02358） 30S ribosomal protein S8 × 1 （P0A7W7） 30S ribosomal protein S12 × 1 （P0A7S3） 30S ribosomal protein S15 × 1 （A0A4S5B232） 30S ribosomal protein S16 × 1 （P0A7T3） 30S ribosomal protein S17 × 1 （P0AG63）	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS20_ECOLI
Isoform	—
PDB entities	10
Chains and sequence ranges	Author chain S； PDBConstruct 1–87； UniProt 1–87

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	6w7w
Deposition date deposition_date	2020-03-19
Structure title title	30S-Inactive-low-Mg2+ Class B
Keywords keywords	30S subunit, conformations, inactive, activated, RIBOSOME; RIBOSOME
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.

6w7w__assembly_1__model_1

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

Download this curve (.dat)

6w7w__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

6w7w__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	52.85 Å
Rg (electron density)	52.98 Å
Total Rg	53.07 Å
Atom count	26883
Residues	1918
Excluded volume	409460 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`6w7w__assembly_1__model_1`	decameric （10）	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 (10)

Entity 1 Entity 1 polymer

Description description	16S rRNA
Molecular weight formula_weight	499690.0 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polyribonucleotide
Chain IDs strand_id	2
Atom count atom_count	26883

AAAUUGAAGAGUUUGAUCAUGGCUCAGAUUGAACGCUGGCGGCAGGCCUAACACAUGCAAGUCGAACGGUAACAGGAAGAAGCUUGCUUCUUUGCUGACGAGUGGCGGACGGGUGAGUAAUGUCUGGGAAACUGCCUGAUGGAGGGGGAUAACUACUGGAAACGGUAGCUAAUACCGCAUAACGUCGCAAGACCAAAGAGGGGGACCUUCGGGCCUCUUGCCAUCGGAUGUGCCCAGAUGGGAUUAGCUAGUAGGUGGGGUAACGGCUCACCUAGGCGACGAUCCCUAGCUGGUCUGAGAGGAUGACCAGCCACACUGGAACUGAGACACGGUCCAGACUCCUACGGGAGGCAGCAGUGGGGAAUAUUGCACAAUGGGCGCAAGCCUGAUGCAGCCAUGCCGCGUGUAUGAAGAAGGCCUUCGGGUUGUAAAGUACUUUCAGCGGGGAGGAAGGGAGUAAAGUUAAUACCUUUGCUCAUUGACGUUACCCGCAGAAGAAGCACCGGCUAACUCCGUGCCAGCAGCCGCGGUAAUACGGAGGGUGCAAGCGUUAAUCGGAAUUACUGGGCGUAAAGCGCACGCAGGCGGUUUGUUAAGUCAGAUGUGAAAUCCCCGGGCUCAACCUGGGAACUGCAUCUGAUACUGGCAAGCUUGAGUCUCGUAGAGGGGGGUAGAAUUCCAGGUGUAGCGGUGAAAUGCGUAGAGAUCUGGAGGAAUACCGGUGGCGAAGGCGGCCCCCUGGACGAAGACUGACGCUCAGGUGCGAAAGCGUGGGGAGCAAACAGGAUUAGAUACCCUGGUAGUCCACGCCGUAAACGAUGUCGACUUGGAGGUUGUGCCCUUGAGGCGUGGCUUCCGGAGCUAACGCGUUAAGUCGACCGCCUGGGGAGUACGGCCGCAAGGUUAAAACUCAAAUGAAUUGACGGGGGCCCGCACAAGCGGUGGAGCAUGUGGUUUAAUUCGAUGCAACGCGAAGAACCUUACCUGGUCUUGACAUCCACGGAAGUUUUCAGAGAUGAGAAUGUGCCUUCGGGAACCGUGAGACAGGUGCUGCAUGGCUGUCGUCAGCUCGUGUUGUGAAAUGUUGGGUUAAGUCCCGCAACGAGCGCAACCCUUAUCCUUUGUUGCCAGCGGUCCGGCCGGGAACUCAAAGGAGACUGCCAGUGAUAAACUGGAGGAAGGUGGGGAUGACGUCAAGUCAUCAUGGCCCUUACGACCAGGGCUACACACGUGCUACAAUGGCGCAUACAAAGAGAAGCGACCUCGCGAGAGCAAGCGGACCUCAUAAAGUGCGUCGUAGUCCGGAUUGGAGUCUGCAACUCGACUCCAUGAAGUCGGAAUCGCUAGUAAUCGUGGAUCAGAAUGCCACGGUGAAUACGUUCCCGGGCCUUGUACACACCGCCCGUCACACCAUGGGAGUGGGUUGCAAAAGAAGUAGGUAGCUUAACCUUCGGGAGGGCGCUUACCACUUUGUGAUUCAUGACUGGGGUGAAGUCGUAACAAGGUAACCGUAGGGGAACCUGCGGUUGGAUCACCUCCUUA

Entity 2 Entity 2 polymer

Description description	30S ribosomal protein S4
Molecular weight formula_weight	23514.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MARYLGPKLKLSRREGTDLFLKSGVRAIDTKCKIEQAPGQHGARKPRLSDYGVQLREKQKVRRIYGVLERQFRNYYKEAARLKGNTGENLLALLEGRLDNVVYRMGFGATRAEARQLVSHKAIMVNGRVVNIASYQVSPNDVVSIREKAKKQSRVKAALELAEQREKPTWLEVDAGKMEGTFKRKPERSDLSADINEHLIVELYSK

Entity 3 Entity 3 polymer

Description description	30S ribosomal protein S5
Molecular weight formula_weight	17629.4 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

MAHIEKQAGELQEKLIAVNRVSKTVKGGRIFSFTALTVVGDGNGRVGFGYGKAREVPAAIQKAMEKARRNMINVALNNGTLQHPVKGVHTGSRVFMQPASEGTGIIAGGAMRAVLEVAGVHNVLAKAYGSTNPINVVRATIDGLENMNSPEMVAAKRGKSVEEILGK

Entity 4 Entity 4 polymer

Description description	30S ribosomal protein S6
Molecular weight formula_weight	15727.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E

MRHYEIVFMVHPDQSEQVPGMIERYTAAITGAEGKIHRLEDWGRRQLAYPINKLHKAHYVLMNVEAPQEVIDELETTFRFNDAVIRSMVMRTKHAVTEASPMVKAKDERRERRDDFANETADDAEAGDSEEEEEE

Entity 5 Entity 5 polymer

Description description	30S ribosomal protein S8
Molecular weight formula_weight	14146.6 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	G

MSMQDPIADMLTRIRNGQAANKAAVTMPSSKLKVAIANVLKEEGFIEDFKVEGDTKPELELTLKYFQGKAVVESIQRVSRPGLRIYKRKDELPKVMAGLGIAVVSTSKGVMTDRAARQAGLGGEIICYVA

Entity 6 Entity 6 polymer

Description description	30S ribosomal protein S12
Molecular weight formula_weight	13768.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	K

MATVNQLVRKPRARKVAKSNVPALEACPQKRGVCTRVYTTTPKKPNSALRKVCRVRLTNGFEVTSYIGGEGHNLQEHSVILIRGGRVKDLPGVRYHTVRGALDCSGVKDRKQARSKYGVKRPKA

Entity 7 Entity 7 polymer

Description description	30S ribosomal protein S15
Molecular weight formula_weight	10319.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	N

MSLSTEATAKIVSEFGRDANDTGSTEVQVALLTAQINHLQGHFAEHKKDHHSRRGLLRMVSQRRKLLDYLKRKDVARYTRLIERLGLRR

Entity 8 Entity 8 polymer

Description description	30S ribosomal protein S16
Molecular weight formula_weight	9207.6 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	O

MVTIRLARHGAKKRPFYQVVVADSRNARNGRFIERVGFFNPIASEKEEGTRLDLDRIAHWVGQGATISDRVAALIKEVNKAA

Entity 9 Entity 9 polymer

Description description	30S ribosomal protein S17
Molecular weight formula_weight	9724.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	P

MTDKIRTLQGRVVSDKMEKSIVVAIERFVKHPIYGKFIKRTTKLHVHDENNECGIGDVVEIRECRPLSKTKSWTLVRVVEKAVL

Entity 10 Entity 10 polymer

Description description	30S ribosomal protein S20
Molecular weight formula_weight	9708.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	S

MANIKSAKKRAIQSEKARKHNASRRSMMRTFIKKVYAAIEAGDKAAAQKAFNEMQPIVDRQAAKGLIHKNKAARHKANLTAQINKLA

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	6w7wC01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1050 — Ribosomal Protein S4 Delta 41; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Ribosomal protein S4/S9, N-terminal domain

Domain ID domain_id	6w7wC02
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	290 — Structural Genomics Hypothetical 15.5 Kd Protein In mrcA-pckA Intergenic Region; Chain A
Homologous superfamily homologous superfamily	10 — RNA-binding S4 domain

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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	3.90 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	236327

30S-Inactive-low-Mg2+ Class B

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

30S ribosomal protein S4

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

30S ribosomal protein S5

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

30S ribosomal protein S6

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

30S ribosomal protein S8

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

30S ribosomal protein S12

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

30S ribosomal protein S15

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

30S ribosomal protein S16

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

30S ribosomal protein S17

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

30S ribosomal protein S20

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

6w7w__assembly_1__model_1

6w7w__assembly_1__model_1 | I(q)

6w7w__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment