SAXSdb — 6gws

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

Proliferating cell nuclear antigen

Homo sapiens

UniProt P12004

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	PCNA-associated factor × 3 （Q15004） water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PCNA_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 4–264； UniProt 1–261 Author chain B； PDBConstruct 4–264； UniProt 1–261 Author chain C； PDBConstruct 4–264； UniProt 1–261

PCNA-associated factor

Homo sapiens

UniProt Q15004

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	Proliferating cell nuclear antigen × 3 （P12004） water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PAF15_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain D； PDBConstruct 1–32； UniProt 41–72 Author chain E； PDBConstruct 1–32； UniProt 41–72 Author chain F； PDBConstruct 1–32； UniProt 41–72

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	6gws
Deposition date deposition_date	2018-06-25
Structure title title	Crystal structure of human PCNA in complex with three p15 peptides
Keywords keywords	PCNA, p15, p15PAF, PAF15, crystal, complex, replication, DNA repair.; REPLICATION
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.

6gws__assembly_1__model_1

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

Download this curve (.dat)

6gws__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

6gws__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	33.57 Å
Rg (electron density)	32.31 Å
Total Rg	33.07 Å
Atom count	6420
Residues	831
Excluded volume	115040 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`6gws__assembly_1__model_1`	hexameric （6）	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 (3)

Entity 1 Entity 1 polymer

Description description	Proliferating cell nuclear antigen
Molecular weight formula_weight	29088.1 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	6430

GPHMFEARLVQGSILKKVLEALKDLINEACWDISSSGVNLQSMDSSHVSLVQLTLRSEGFDTYRCDRNLAMGVNLTSMSKILKCAGNEDIITLRAEDNADTLALVFEAPNQEKVSDYEMKLMDLDVEQLGIPEQEYSCVVKMPSGEFARICRDLSHIGDAVVISCAKDGVKFSASGELGNGNIKLSQTSNVDKEEEAVTIEMNEPVQLTFALRYLNFFTKATPLSSTVTLSMSADVPLVVEYKIADMGHLKYYLAPKIEDEEGS

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 BL21(DE3)

Entity 2 Entity 2 polymer

Description description	PCNA-associated factor
Molecular weight formula_weight	3642.2 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D,E,F

RKAENKYAGGNPVCVRPTPKWQKGIGEFFRLS

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 BL21(DE3)

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	10

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6. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d6gwsa1
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.131.1.0 — automated matches

Domain ID domain_id	d6gwsa2
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.131.1.0 — automated matches

Domain ID domain_id	d6gwsb1
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.131.1.0 — automated matches

Domain ID domain_id	d6gwsb2
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.131.1.0 — automated matches

Domain ID domain_id	d6gwsc1
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.131.1.0 — automated matches

Domain ID domain_id	d6gwsc2
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.131.1.0 — automated matches

CATH v4.4 (3 domains)

Domain ID domain_id	6gwsA00
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	6gwsB00
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	6gwsC00
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	79.240 Å
Unit-cell length b length_b	89.750 Å
Unit-cell length c length_c	85.130 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	117.25 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	6

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.900 Å
Low-resolution limit resolution_low	75.690 Å
R factor r_factor	0.2030
R_work r_work	0.2000
R_free r_free	0.2632

Crystal structure of human PCNA in complex with three p15 peptides

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

Proliferating cell nuclear antigen

State in the Current Structure

Other States of the Same Protein in the Database

PCNA-associated factor

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

6gws__assembly_1__model_1

6gws__assembly_1__model_1 | I(q)

6gws__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (6 domains)

CATH v4.4 (3 domains)

7. Citations (1)

Crystal structure of human PCNA in complex with three p15 peptides

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

Proliferating cell nuclear antigen

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

PCNA-associated factor

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

6gws__assembly_1__model_1

6gws__assembly_1__model_1 | I(q)

6gws__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (6 domains)

CATH v4.4 (3 domains)

7. Citations (1)