SAXSdb — 1oki

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

BETA CRYSTALLIN B1

HOMO SAPIENS

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	CRB1_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–210； UniProt 42–251 Author chain B； PDBConstruct 1–210； UniProt 42–251

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	1oki
Deposition date deposition_date	2003-07-25
Structure title title	Crystal structure of truncated human beta-B1-crystallin
Keywords keywords	CRYSTALLIN, CATARACT, EYE LENS PROTEIN; EYE LENS 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.

1oki__assembly_1__model_1

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

Download this curve (.dat)

1oki__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1oki__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.32 Å
Rg (electron density)	20.10 Å
Total Rg	21.07 Å
Atom count	3039
Residues	365
Excluded volume	53148 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1oki__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) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1okia1
Class class	b — All beta proteins
Fold Fold fold	b.11 — gamma-Crystallin-like
Superfamily Superfamily superfamily	b.11.1 — gamma-Crystallin-like
Family Family family	b.11.1.1 — Crystallins/Ca-binding development proteins

Domain ID domain_id	d1okia2
Class class	b — All beta proteins
Fold Fold fold	b.11 — gamma-Crystallin-like
Superfamily Superfamily superfamily	b.11.1 — gamma-Crystallin-like
Family Family family	b.11.1.1 — Crystallins/Ca-binding development proteins

Domain ID domain_id	d1okib1
Class class	b — All beta proteins
Fold Fold fold	b.11 — gamma-Crystallin-like
Superfamily Superfamily superfamily	b.11.1 — gamma-Crystallin-like
Family Family family	b.11.1.1 — Crystallins/Ca-binding development proteins

Domain ID domain_id	d1okib2
Class class	b — All beta proteins
Fold Fold fold	b.11 — gamma-Crystallin-like
Superfamily Superfamily superfamily	b.11.1 — gamma-Crystallin-like
Family Family family	b.11.1.1 — Crystallins/Ca-binding development proteins

CATH v4.4 (4 domains)

Domain ID domain_id	1okiA01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	20 — Gamma-B Crystallin; domain 1
Homologous superfamily homologous superfamily	10 — Crystallins

Domain ID domain_id	1okiA02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	20 — Gamma-B Crystallin; domain 1
Homologous superfamily homologous superfamily	10 — Crystallins

Domain ID domain_id	1okiB01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	20 — Gamma-B Crystallin; domain 1
Homologous superfamily homologous superfamily	10 — Crystallins

Domain ID domain_id	1okiB02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	20 — Gamma-B Crystallin; domain 1
Homologous superfamily homologous superfamily	10 — Crystallins

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Unit-cell length a length_a	45.040 Å
Unit-cell length b length_b	45.040 Å
Unit-cell length c length_c	171.111 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 43
Space-group number int_tables_number	78
Crystal system crystal_system	—

Resolution resolution	1.400 Å
Low-resolution limit resolution_low	45.170 Å
R factor r_factor	0.1720
R_work r_work	0.1710
R_free r_free	0.2010

Description description	BETA CRYSTALLIN B1
Molecular weight formula_weight	24252.1 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	3476

Crystal structure of truncated human beta-B1-crystallin

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

BETA CRYSTALLIN B1

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

1oki__assembly_1__model_1

1oki__assembly_1__model_1 | I(q)

1oki__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) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 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(DE3)

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	423

Crystal structure of truncated human beta-B1-crystallin

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

BETA CRYSTALLIN B1

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

1oki__assembly_1__model_1

1oki__assembly_1__model_1 | I(q)

1oki__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) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)