1xni

Tandem Tudor Domain of 53BP1

Method: X-RAY DIFFRACTION

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

Tumor suppressor p53-binding protein 1

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
10	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
4	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
5	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
6	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
7	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
8	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
9	Protein monomer	Monomer	Protein 1	No other associated polymer	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	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–118； UniProt 1485–1602 Author chain B； PDBConstruct 1–118； UniProt 1485–1602 Author chain C； PDBConstruct 1–118； UniProt 1485–1602 Author chain D； PDBConstruct 1–118； UniProt 1485–1602 Author chain E； PDBConstruct 1–118； UniProt 1485–1602 Author chain F； PDBConstruct 1–118； UniProt 1485–1602 Author chain G； PDBConstruct 1–118； UniProt 1485–1602 Author chain H； PDBConstruct 1–118； UniProt 1485–1602 Author chain I； PDBConstruct 1–118； UniProt 1485–1602 Author chain J； PDBConstruct 1–118； UniProt 1485–1602

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	1xni
Deposition date deposition_date	2004-10-05
Structure title title	Tandem Tudor Domain of 53BP1
Keywords keywords	beta-barrel, bent beta-sheet, CELL CYCLE; CELL CYCLE
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.

1xni__assembly_1__model_1

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

Download this curve (.dat)

1xni__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1xni__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.37 Å
Rg (electron density)	14.08 Å
Total Rg	15.30 Å
Atom count	948
Residues	118
Excluded volume	16903 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1xni__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1xni__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1xni__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`1xni__assembly_4__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
5	1	`1xni__assembly_5__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
6	1	`1xni__assembly_6__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
7	1	`1xni__assembly_7__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
8	1	`1xni__assembly_8__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
9	1	`1xni__assembly_9__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
10	1	`1xni__assembly_10__model_1`	monomeric （1）	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 (1)

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6. Fold Classification (SCOP + CATH) 40 domains

SCOP 2.08 (20 domains)

Domain ID domain_id	d1xnia1
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnia2
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnib1
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnib2
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnic1
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnic2
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnid1
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnid2
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnie1
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnie2
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnif1
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnif2
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnig1
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnig2
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnih1
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnih2
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnii1
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnii2
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnij1
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

Domain ID domain_id	d1xnij2
Class class	b — All beta proteins
Fold Fold fold	b.34 — SH3-like barrel
Superfamily Superfamily superfamily	b.34.9 — Tudor/PWWP/MBT
Family Family family	b.34.9.1 — Tudor domain

CATH v4.4 (20 domains)

Domain ID domain_id	1xniA01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	1xniA02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1xniB01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	1xniB02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1xniC01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	1xniC02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1xniD01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	1xniD02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1xniE01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	1xniE02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1xniF01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	1xniF02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1xniG01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	1xniG02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1xniH01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	1xniH02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1xniI01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	1xniI02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1xniJ01
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	140 —

Domain ID domain_id	1xniJ02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	30 — SH3 type barrels.
Homologous superfamily homologous superfamily	30 —

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Unit-cell length a length_a	71.610 Å
Unit-cell length b length_b	157.664 Å
Unit-cell length c length_c	179.723 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	40

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

Resolution resolution	2.800 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	—
R_work r_work	0.2470
R_free r_free	0.2690

Description description	Tumor suppressor p53-binding protein 1
Molecular weight formula_weight	13447.2 kDa
Source method src_method	man
Copy count entity_count	10

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H,I,J
Atom count atom_count	9480

Tandem Tudor Domain of 53BP1

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

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

1xni__assembly_1__model_1

1xni__assembly_1__model_1 | I(q)

1xni__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 40 domains

SCOP 2.08 (20 domains)

CATH v4.4 (20 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 BL21

Tandem Tudor Domain of 53BP1

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

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

1xni__assembly_1__model_1

1xni__assembly_1__model_1 | I(q)

1xni__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 40 domains

SCOP 2.08 (20 domains)

CATH v4.4 (20 domains)

7. Citations (1)