SAXSdb — 1kzy

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

CELLULAR TUMOR ANTIGEN P53

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	TUMOR SUPPRESSOR P53-BINDING PROTEIN 1 × 2 （Q12888） ZINC ION × 2 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	P53_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–195； UniProt 95–289 Author chain B； PDBConstruct 1–195； UniProt 95–289

TUMOR SUPPRESSOR P53-BINDING PROTEIN 1

Homo sapiens

UniProt Q12888

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	CELLULAR TUMOR ANTIGEN P53 × 2 （P04637） ZINC ION × 2 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TP53B_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 1–259； UniProt 1714–1972 Author chain D； PDBConstruct 1–259； UniProt 1714–1972

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	1kzy
Deposition date deposition_date	2002-02-08
Structure title title	Crystal Structure of the 53bp1 BRCT Region Complexed to Tumor Suppressor P53
Keywords keywords	;TANDEM-BRCT AND LINKER COMPLEXED WITH NON-BRCT PROTEIN, THREE-HELIX BUNDLE, PARALLEL BETA SHEET, DNA BINDING PROTEIN, PROTEIN BINDING ;; DNA BINDING PROTEIN, 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.

1kzy__assembly_1__model_1

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

Download this curve (.dat)

1kzy__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1kzy__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	32.48 Å
Rg (electron density)	31.90 Å
Total Rg	32.42 Å
Atom count	6770
Residues	854
Excluded volume	119690 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1kzy__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 (4)

Entity 1 Entity 1 polymer

Description description	CELLULAR TUMOR ANTIGEN P53
Molecular weight formula_weight	21945.9 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	6986

SSVPSQKTYQGSYGFRLGFLHSGTAKSVTCTYSPALNKMFCQLAKTCPVQLWVDSTPPPGTRVRAMAIYKQSQHMTEVVRRCPHHERCSDSDGLAPPQHLIRVEGNLRVEYLDDRNTFRHSVVVPYEPPEVGSDCTTIHYNYMCNSSCMGGMNRRPILTIITLEDSSGNLLGRNSFEVRVCACPGRDRRTEEENL

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	TUMOR SUPPRESSOR P53-BINDING PROTEIN 1
Molecular weight formula_weight	29268.1 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,D

ALEEQRGPLPLNKTLFLGYAFLLTMATTSDKLASRSKLPDGPTGSSEEEEEFLEIPPFNKQYTESQLRAGAGYILEDFNEAQCNTAYQCLLIADQHCRTRKYFLCLASGIPCVSHVWVHDSCHANQLQNYRNYLLPAGYSLEEQRILDWQPRENPFQNLKVLLVSDQQQNFLELWSEILMTGGAASVKQHHSSAHNKDIALGVFDVVVTDPSCPASVLKCAEALQLPVVSQEWVIQCLIVGERIGFKQHPKYKHDYVSH

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 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	216

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1kzya_
Class class	b — All beta proteins
Fold Fold fold	b.2 — Common fold of diphtheria toxin/transcription factors/cytochrome f
Superfamily Superfamily superfamily	b.2.5 — p53-like transcription factors
Family Family family	b.2.5.2 — p53 DNA-binding domain-like

Domain ID domain_id	d1kzyb_
Class class	b — All beta proteins
Fold Fold fold	b.2 — Common fold of diphtheria toxin/transcription factors/cytochrome f
Superfamily Superfamily superfamily	b.2.5 — p53-like transcription factors
Family Family family	b.2.5.2 — p53 DNA-binding domain-like

Domain ID domain_id	d1kzyc1
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.15.1.4 — 53BP1

Domain ID domain_id	d1kzyc2
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.15.1.4 — 53BP1

Domain ID domain_id	d1kzyd1
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.15.1.4 — 53BP1

Domain ID domain_id	d1kzyd2
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.15.1.4 — 53BP1

CATH v4.4 (6 domains)

Domain ID domain_id	1kzyA00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	720 —

Domain ID domain_id	1kzyB00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	720 —

Domain ID domain_id	1kzyC01
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	1kzyC02
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	1kzyD01
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	1kzyD02
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	73.132 Å
Unit-cell length b length_b	94.976 Å
Unit-cell length c length_c	133.680 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	2.500 Å
Low-resolution limit resolution_low	15.000 Å
R factor r_factor	—
R_work r_work	0.2160
R_free r_free	0.2560

Crystal Structure of the 53bp1 BRCT Region Complexed to Tumor Suppressor P53

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

CELLULAR TUMOR ANTIGEN P53

State in the Current Structure

Other States of the Same Protein in the Database

TUMOR SUPPRESSOR P53-BINDING PROTEIN 1

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

1kzy__assembly_1__model_1

1kzy__assembly_1__model_1 | I(q)

1kzy__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)

Crystal Structure of the 53bp1 BRCT Region Complexed to Tumor Suppressor P53

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

CELLULAR TUMOR ANTIGEN P53

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

TUMOR SUPPRESSOR P53-BINDING PROTEIN 1

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

1kzy__assembly_1__model_1

1kzy__assembly_1__model_1 | I(q)

1kzy__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)