SAXSdb — 1bec

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

14.3.D T CELL ANTIGEN RECEPTOR

Mus musculus

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain A； UniProt 32–267	Mutation：N24Q, N74Q, N121Q, N236V	No other associated polymer	X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions	Resolution 1.70 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

No other PDB entry for the same UniProt protein was found.

View Construct and Data Evidence

UniProt name	Q8K1Z5_MOUSE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–238； UniProt 32–267

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	1bec
Deposition date deposition_date	1995-02-28
Structure title title	BETA CHAIN OF A T CELL ANTIGEN RECEPTOR
Keywords keywords	T CELL RECEPTOR, RECEPTOR; RECEPTOR
Experimental Method method	X-RAY DIFFRACTION

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	22.04 Å
Radius of gyration Rg (electron density) rg_electron	21.25 Å
Forward intensity I(0) i0	12738100.00
Molecular weight molecular_weight	25831.0 kDa
Excluded volume excluded_volume	31856 Å³
Envelope volume envelope_volume	39839 Å³
Hydration-shell volume shell_volume	16513 Å³
Envelope diameter envelope_diameter	73.5 Å
Shell Rg shell_rg	26.69 Å
Envelope Rg envelope_rg	21.39 Å
Shape Rg shape_rg	21.26 Å
Total Rg total_rg	21.99 Å
Total atoms total_atoms	1826
Residues n_residues	238
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	72.8 Å
Rg (real space) rg_real	22.12 Å
Rg uncertainty (real space) rg_real_error	0.62 Å
I(0) (real space) i0_real	1.2740e+07
I(0) uncertainty (real space) i0_real_error	1.7970e+05
Rg (reciprocal space) rg_reciprocal	22.11 Å
I(0) (reciprocal space) i0_reciprocal	12740000.0000
Solution quality estimate total_estimate	0.8016
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	2
Primary peak position r_peak_primary	19.6 Å
Skewness Skewness skewness	0.343
Kurtosis Kurtosis kurtosis	-0.560
Angular range angular_range	— – 0.3600 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	2706000.0000
Real-space data points n_real_points	68
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.868; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.814; Smooth: 0.000

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (2)

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7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1beca1
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.1 — Immunoglobulin
Family Family family	b.1.1.1 — V set domains (antibody variable domain-like)

Domain ID domain_id	d1beca2
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.1 — Immunoglobulin
Family Family family	b.1.1.2 — C1 set domains (antibody constant domain-like)

CATH v4.4 (2 domains)

Domain ID domain_id	1becA01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	1becA02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

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8. Citations (2)

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Unit-cell length a length_a	100.600 Å
Unit-cell length b length_b	36.600 Å
Unit-cell length c length_c	71.500 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	113.40 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	1.700 Å
Low-resolution limit resolution_low	7.000 Å
R factor r_factor	0.1980
R_work r_work	0.1980
R_free r_free	—

Description description	14.3.D T CELL ANTIGEN RECEPTOR
Molecular weight formula_weight	26568.5 kDa
Mutation mutation	N24Q, N74Q, N121Q, N236V
Source method src_method	man
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1935

BETA CHAIN OF A T CELL ANTIGEN RECEPTOR

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

14.3.D T CELL ANTIGEN RECEPTOR

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

6. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

Entity 2 Entity 2 water

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

8. Citations (2)

9. Files and Curves (10)

Files (7)

Curves (3)

来源生物 organism	Mus musculus
通用名 common_name	house mouse
NCBI Class编号 ncbi_taxonomy_id	10090
宿主生物 host_organism	Mus musculus

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	109

fit	/app/data/saxs_computation/be/1bec/1bec.fit
pddf	/app/data/pr_computation/be/1bec/1bec.pr.out
profile	/app/data/saxs_computation/be/1bec/1bec.dat