SAXSdb — 3pc6

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

DNA repair protein XRCC1

Mus musculus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	XRCC1_MOUSE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–98； UniProt 535–631 Author chain B； PDBConstruct 2–98； UniProt 535–631

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	3pc6
Deposition date deposition_date	2010-10-21
Structure title title	X-ray crystal structure of the second XRCC1 BRCT domain.
Keywords keywords	DNA repair, BRCT domain, Protein:protein interactions, DNA ligase III-alpha BRCT2 domain, DNA BINDING PROTEIN; DNA BINDING PROTEIN
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.

3pc6__assembly_1__model_1

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

Download this curve (.dat)

3pc6__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3pc6__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.46 Å
Rg (electron density)	20.52 Å
Total Rg	21.25 Å
Atom count	1695
Residues	201
Excluded volume	29997 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3pc6__assembly_1__model_1`	dimeric （2）	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)

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d3pc6a1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.15 — BRCT domain
Superfamily Superfamily superfamily	c.15.1 — BRCT domain
Family Family family	c.15.1.1 — DNA-repair protein XRCC1

Domain ID domain_id	d3pc6a2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d3pc6b1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.15 — BRCT domain
Superfamily Superfamily superfamily	c.15.1 — BRCT domain
Family Family family	c.15.1.1 — DNA-repair protein XRCC1

Domain ID domain_id	d3pc6b2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (2 domains)

Domain ID domain_id	3pc6A00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	10190 — BRCT domain

Domain ID domain_id	3pc6B00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	10190 — BRCT domain

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Unit-cell length a length_a	44.230 Å
Unit-cell length b length_b	56.850 Å
Unit-cell length c length_c	100.380 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	8

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

Resolution resolution	1.900 Å
Low-resolution limit resolution_low	37.625 Å
R factor r_factor	0.1823
R_work r_work	0.1800
R_free r_free	0.2266

Description description	DNA repair protein XRCC1
Molecular weight formula_weight	12588.2 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	1944

X-ray crystal structure of the second XRCC1 BRCT domain.

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

DNA repair protein XRCC1

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

3pc6__assembly_1__model_1

3pc6__assembly_1__model_1 | I(q)

3pc6__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 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Mus musculus
Common name common_name	mouse
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	182

X-ray crystal structure of the second XRCC1 BRCT domain.

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

DNA repair protein XRCC1

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

3pc6__assembly_1__model_1

3pc6__assembly_1__model_1 | I(q)

3pc6__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 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

CATH v4.4 (2 domains)

7. Citations (1)