SAXSdb — 3rpx

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

Complement component 1 Q subcomponent-binding protein

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	UNKNOWN ATOM OR ION × 19	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	C1QBP_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–187； UniProt 96–282 Author chain B； PDBConstruct 1–187； UniProt 96–282 Author chain C； PDBConstruct 1–187； UniProt 96–282

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	3rpx
Deposition date deposition_date	2011-04-27
Structure title title	Crystal structure of complement component 1, q subcomponent binding protein, C1QBP
Keywords keywords	structural genomics, structural genomics consortium, mitochondrion matrix, complement system, protein-binding, SGC, PROTEIN BINDING; PROTEIN BINDING
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.

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3rpx__assembly_1__model_1`	trimeric （3）	Excluded	—	—
	Exclusion reason： The source record does not identify the atom or ion element unambiguously, so a reliable calculation is not possible.

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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) 3 domains

CATH v4.4 (3 domains)

Domain ID domain_id	3rpxA00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	280 — Mitochondrial Matrix Protein; Chain A
Homologous superfamily homologous superfamily	10 — Mitochondrial glycoprotein

Domain ID domain_id	3rpxB00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	280 — Mitochondrial Matrix Protein; Chain A
Homologous superfamily homologous superfamily	10 — Mitochondrial glycoprotein

Domain ID domain_id	3rpxC00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	280 — Mitochondrial Matrix Protein; Chain A
Homologous superfamily homologous superfamily	10 — Mitochondrial glycoprotein

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Unit-cell length a length_a	115.680 Å
Unit-cell length b length_b	123.770 Å
Unit-cell length c length_c	137.110 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	24

Space group space_group	I 2 2 2
Space-group number int_tables_number	23
Crystal system crystal_system	—

Resolution resolution	2.650 Å
Low-resolution limit resolution_low	19.700 Å
R factor r_factor	0.1965
R_work r_work	0.1949
R_free r_free	0.2238

Description description	Complement component 1 Q subcomponent-binding protein
Molecular weight formula_weight	22128.2 kDa
Source method src_method	man
Copy count entity_count	3

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	3257

Crystal structure of complement component 1, q subcomponent binding protein, C1QBP

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

Complement component 1 Q subcomponent-binding protein

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

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 non-polymer

6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

7. Citations (1)

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

Description description	UNKNOWN ATOM OR ION
Source method src_method	syn
Copy count entity_count	19

Crystal structure of complement component 1, q subcomponent binding protein, C1QBP

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

Complement component 1 Q subcomponent-binding protein

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

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 non-polymer

6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

7. Citations (1)