SAXSdb — 1b8h

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

DNA POLYMERASE PROCESSIVITY COMPONENT

Enterobacteria phage RB69

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	DNA POLYMERASE fragment × 1 （Q38087）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	DPA5_BPR69
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–228； UniProt 1–228 Author chain B； PDBConstruct 1–228； UniProt 1–228 Author chain C； PDBConstruct 1–228； UniProt 1–228

DNA POLYMERASE fragment

OrganismNot specified

UniProt Q38087

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	DNA POLYMERASE PROCESSIVITY COMPONENT × 3 （O80164）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	DPOL_BPR69
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain D； PDBConstruct 1–11； UniProt 893–903

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	1b8h
Deposition date deposition_date	1999-02-01
Structure title title	SLIDING CLAMP, DNA POLYMERASE
Keywords keywords	SLIDING CLAMP, GP45, REPLISOME, ACCESSORY PROTEIN, TRANSFERASE; TRANSFERASE
Experimental Method method	X-RAY DIFFRACTION

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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.

1b8h__assembly_1__model_1

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

Download this curve (.dat)

1b8h__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1b8h__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	34.50 Å
Rg (electron density)	33.39 Å
Total Rg	34.00 Å
Atom count	5393
Residues	695
Excluded volume	96588 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1b8h__assembly_1__model_1`	tetrameric （4）	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 (2)

Entity 1 Entity 1 polymer

Description description	DNA POLYMERASE PROCESSIVITY COMPONENT
Molecular weight formula_weight	25133.5 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	5393

MKLSKDTIAILKNFASINSGILLSQGKFIMTRAVNGTTYAEANISDEIDFDVALYDLNSFLSILSLVSDDAEISMHTDGNIKIADTRSTVYWPAADKSTIVFPNKPIQFPVASVITEIKAEDLQQLLRVSRGLQIDTIAITNKDGKIVINGYNKVEDSGLTRPKYSLTLTDYDGSNNFNFVINMANMKIQPGNYKVMLWGAGDKVAAKFESSQVSYVIAMEADSTHDF

Source Source

Source organism organism	Enterobacteria phage RB69
NCBI taxonomy ID ncbi_taxonomy_id	12353
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	DNA POLYMERASE fragment
Molecular weight formula_weight	1350.6 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

KKASLFDMFDF

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6. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1b8ha1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.131 — DNA clamp
Superfamily Superfamily superfamily	d.131.1 — DNA clamp
Family Family family	d.131.1.2 — DNA polymerase processivity factor

Domain ID domain_id	d1b8ha2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.131 — DNA clamp
Superfamily Superfamily superfamily	d.131.1 — DNA clamp
Family Family family	d.131.1.2 — DNA polymerase processivity factor

Domain ID domain_id	d1b8hb1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.131 — DNA clamp
Superfamily Superfamily superfamily	d.131.1 — DNA clamp
Family Family family	d.131.1.2 — DNA polymerase processivity factor

Domain ID domain_id	d1b8hb2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.131 — DNA clamp
Superfamily Superfamily superfamily	d.131.1 — DNA clamp
Family Family family	d.131.1.2 — DNA polymerase processivity factor

Domain ID domain_id	d1b8hc1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.131 — DNA clamp
Superfamily Superfamily superfamily	d.131.1 — DNA clamp
Family Family family	d.131.1.2 — DNA polymerase processivity factor

Domain ID domain_id	d1b8hc2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.131 — DNA clamp
Superfamily Superfamily superfamily	d.131.1 — DNA clamp
Family Family family	d.131.1.2 — DNA polymerase processivity factor

CATH v4.4 (3 domains)

Domain ID domain_id	1b8hA00
Class class	3 — Alpha Beta
Architecture architecture	70 — Box
Topology topology	10 — Proliferating Cell Nuclear Antigen
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1b8hB00
Class class	3 — Alpha Beta
Architecture architecture	70 — Box
Topology topology	10 — Proliferating Cell Nuclear Antigen
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1b8hC00
Class class	3 — Alpha Beta
Architecture architecture	70 — Box
Topology topology	10 — Proliferating Cell Nuclear Antigen
Homologous superfamily homologous superfamily	10 —

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Unit-cell length a length_a	67.000 Å
Unit-cell length b length_b	90.500 Å
Unit-cell length c length_c	146.000 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	12

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	3.000 Å
Low-resolution limit resolution_low	40.000 Å
R factor r_factor	—
R_work r_work	0.2650
R_free r_free	0.3130

SLIDING CLAMP, DNA POLYMERASE

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

DNA POLYMERASE PROCESSIVITY COMPONENT

State in the Current Structure

Other States of the Same Protein in the Database

DNA POLYMERASE fragment

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1b8h__assembly_1__model_1

1b8h__assembly_1__model_1 | I(q)

1b8h__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

6. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (6 domains)

CATH v4.4 (3 domains)

7. Citations (1)

SLIDING CLAMP, DNA POLYMERASE

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

DNA POLYMERASE PROCESSIVITY COMPONENT

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 POLYMERASE fragment

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

1b8h__assembly_1__model_1

1b8h__assembly_1__model_1 | I(q)

1b8h__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

6. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (6 domains)

CATH v4.4 (3 domains)

7. Citations (1)