SAXSdb — 1a03

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

CALCYCLIN (RABBIT, CA2+)

Oryctolagus cuniculus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	S10A6_RABIT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–90； UniProt 1–90 Author chain B； PDBConstruct 1–90； UniProt 1–90

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	1a03
Deposition date deposition_date	1997-12-08
Structure title title	THE THREE-DIMENSIONAL STRUCTURE OF CA2+-BOUND CALCYCLIN: IMPLICATIONS FOR CA2+-SIGNAL TRANSDUCTION BY S100 PROTEINS, NMR, 20 STRUCTURES
Keywords keywords	CALCIUM-BINDING PROTEIN, EF-HAND, S-100 PROTEIN; CALCIUM-BINDING PROTEIN
Experimental Method method	SOLUTION NMR

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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.

1a03__assembly_1__model_2

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

Download this curve (.dat)

1a03__assembly_1__model_2 | I(q)

100 plotted points; both axes use logarithmic scales.

1a03__assembly_1__model_2 | P(r) · Pending

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

Rg（Guinier）	18.27 Å
Rg (electron density)	17.15 Å
Total Rg	18.32 Å
Atom count	2896
Residues	180
Excluded volume	25778 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1a03__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	2	`1a03__assembly_1__model_2`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	3	`1a03__assembly_1__model_3`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	4	`1a03__assembly_1__model_4`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	5	`1a03__assembly_1__model_5`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	6	`1a03__assembly_1__model_6`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	7	`1a03__assembly_1__model_7`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	8	`1a03__assembly_1__model_8`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	9	`1a03__assembly_1__model_9`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	10	`1a03__assembly_1__model_10`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	11	`1a03__assembly_1__model_11`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	12	`1a03__assembly_1__model_12`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	13	`1a03__assembly_1__model_13`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	14	`1a03__assembly_1__model_14`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	15	`1a03__assembly_1__model_15`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	16	`1a03__assembly_1__model_16`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	17	`1a03__assembly_1__model_17`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	18	`1a03__assembly_1__model_18`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	19	`1a03__assembly_1__model_19`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	20	`1a03__assembly_1__model_20`	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 (1)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1a03a_
Class class	a — All alpha proteins
Fold Fold fold	a.39 — EF Hand-like
Superfamily Superfamily superfamily	a.39.1 — EF-hand
Family Family family	a.39.1.2 — S100 proteins

Domain ID domain_id	d1a03b_
Class class	a — All alpha proteins
Fold Fold fold	a.39 — EF Hand-like
Superfamily Superfamily superfamily	a.39.1 — EF-hand
Family Family family	a.39.1.2 — S100 proteins

CATH v4.4 (2 domains)

Domain ID domain_id	1a03A00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	238 — Recoverin; domain 1
Homologous superfamily homologous superfamily	10 — EF-hand

Domain ID domain_id	1a03B00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	238 — Recoverin; domain 1
Homologous superfamily homologous superfamily	10 — EF-hand

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 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	1

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

Description description	CALCYCLIN (RABBIT, CA2+)
Molecular weight formula_weight	10167.7 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	57920

Source organism organism	Oryctolagus cuniculus
Common name common_name	rabbit
NCBI taxonomy ID ncbi_taxonomy_id	9986
Host organism host_organism	Escherichia coli

THE THREE-DIMENSIONAL STRUCTURE OF CA2+-BOUND CALCYCLIN: IMPLICATIONS FOR CA2+-SIGNAL TRANSDUCTION BY S100 PROTEINS, NMR, 20 STRUCTURES

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

CALCYCLIN (RABBIT, CA2+)

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

1a03__assembly_1__model_2

1a03__assembly_1__model_2 | I(q)

1a03__assembly_1__model_2 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

5. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (6)

THE THREE-DIMENSIONAL STRUCTURE OF CA2+-BOUND CALCYCLIN: IMPLICATIONS FOR CA2+-SIGNAL TRANSDUCTION BY S100 PROTEINS, NMR, 20 STRUCTURES

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

CALCYCLIN (RABBIT, CA2+)

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

1a03__assembly_1__model_2

1a03__assembly_1__model_2 | I(q)

1a03__assembly_1__model_2 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

5. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (6)