SAXSdb — 3brx

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

Annexin

Gossypium hirsutum

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	PHOSPHATE ION × 5 CALCIUM ION × 3 water × 1	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	PHOSPHATE ION × 10 CALCIUM ION × 6 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	P93157_GOSHI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–317； UniProt 1–315

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	3brx
Deposition date deposition_date	2007-12-21
Structure title title	Crystal Structure of calcium-bound cotton annexin Gh1
Keywords keywords	calcium binding, membrane binding, Annexin, MEMBRANE PROTEIN; MEMBRANE 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.

3brx__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3brx__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3brx__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	29.39 Å
Rg (electron density)	28.35 Å
Total Rg	29.18 Å
Atom count	5142
Residues	634
Excluded volume	90861 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3brx__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3brx__assembly_2__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 (4)

Entity 1 Entity 1 polymer

Description description	Annexin
Molecular weight formula_weight	36154.9 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2832

HHATLTVPTTVPSVSEDCEQLRKAFSGWGTNEGLIIDILGHRNAEQRNLIRKTYAETYGEDLLKALDKELSNDFERLVLLWALDPAERDALLANEATKRWTSSNQVLMEIACTRSANQLLHARQAYHARYKKSLEEDVAHHTTGDFHKLLLPLVSSYRYEGEEVNMTLAKTEAKLLHEKISNKAYSDDDVIRVLATRSKAQINATLNHYKNEYGNDINKDLKADPKDEFLALLRSTVKCLVYPEKYFEKVLRLAINRRGTDEGALTRVVCTRAEVDLKVIADEYQRRNSVPLTRAIVKDTHGDYEKLLLVLAGHVEN

Source Source

Source organism organism	Gossypium hirsutum
Common name common_name	upland cotton
NCBI taxonomy ID ncbi_taxonomy_id	3635
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	PHOSPHATE ION
Molecular weight formula_weight	95.0 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 3 Entity 3 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	261

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d3brxa2
Class class	a — All alpha proteins
Fold Fold fold	a.65 — Annexin
Superfamily Superfamily superfamily	a.65.1 — Annexin
Family Family family	a.65.1.1 — Annexin

Domain ID domain_id	d3brxa3
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (4 domains)

Domain ID domain_id	3brxA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	220 — Annexin V; domain 1
Homologous superfamily homologous superfamily	10 — Annexin

Domain ID domain_id	3brxA02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	220 — Annexin V; domain 1
Homologous superfamily homologous superfamily	10 — Annexin

Domain ID domain_id	3brxA03
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	220 — Annexin V; domain 1
Homologous superfamily homologous superfamily	10 — Annexin

Domain ID domain_id	3brxA04
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	220 — Annexin V; domain 1
Homologous superfamily homologous superfamily	10 — Annexin

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Unit-cell length a length_a	132.663 Å
Unit-cell length b length_b	132.663 Å
Unit-cell length c length_c	61.338 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	6

Space group space_group	P 3 2 1
Space-group number int_tables_number	150
Crystal system crystal_system	—

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	35.440 Å
R factor r_factor	0.1960
R_work r_work	0.1930
R_free r_free	0.2520

Crystal Structure of calcium-bound cotton annexin Gh1

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

Annexin

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

3brx__assembly_2__model_1

3brx__assembly_2__model_1 | I(q)

3brx__assembly_2__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 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Crystal Structure of calcium-bound cotton annexin Gh1

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

Annexin

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

3brx__assembly_2__model_1

3brx__assembly_2__model_1 | I(q)

3brx__assembly_2__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 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)