SAXSdb — 1e7n

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

BETA-CRYSTALLIN B2

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	CRBB2_MOUSE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–103； UniProt 2–107 Author chain B； PDBConstruct 1–103； UniProt 2–107

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	1e7n
Deposition date deposition_date	2000-08-31
Structure title title	The N-terminal domain of beta-B2-crystallin resembles the putative ancestral homodimer
Keywords keywords	STRUCTURAL PROTEIN, EYE LENS PROTEIN, DOMAIN INTERACTIONS, 2-FOLD SYMMETRY; STRUCTURAL 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.

1e7n__assembly_1__model_1

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

Download this curve (.dat)

1e7n__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1e7n__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	17.62 Å
Rg (electron density)	16.43 Å
Total Rg	17.42 Å
Atom count	1403
Residues	178
Excluded volume	24612 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1e7n__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) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1e7na_
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	d1e7nb_
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 (2 domains)

Domain ID domain_id	1e7nA00
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	1e7nB00
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	110.960 Å
Unit-cell length b length_b	110.960 Å
Unit-cell length c length_c	29.880 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 65
Space-group number int_tables_number	170
Crystal system crystal_system	—

Resolution resolution	2.350 Å
Low-resolution limit resolution_low	19.890 Å
R factor r_factor	0.2120
R_work r_work	0.2120
R_free r_free	0.2460

Description description	BETA-CRYSTALLIN B2
Molecular weight formula_weight	11911.1 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	1464

The N-terminal domain of beta-B2-crystallin resembles the putative ancestral homodimer

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

BETA-CRYSTALLIN B2

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

1e7n__assembly_1__model_1

1e7n__assembly_1__model_1 | I(q)

1e7n__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	MUS MUSCULUS
Common name common_name	HOUSE 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	61

The N-terminal domain of beta-B2-crystallin resembles the putative ancestral homodimer

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

BETA-CRYSTALLIN B2

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

1e7n__assembly_1__model_1

1e7n__assembly_1__model_1 | I(q)

1e7n__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)