SAXSdb — 2ix7

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

CALMODULIN

MUS MUSCULUS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	MYOSIN-5A × 1 （Q99104） SULFATE ION × 5 CYSTEINE × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CALM_MOUSE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–145； UniProt 2–146 Author chain B； PDBConstruct 1–145； UniProt 2–146

MYOSIN-5A

MUS MUSCULUS

UniProt Q99104

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	CALMODULIN × 2 （P62204） SULFATE ION × 5 CYSTEINE × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MYO5A_MOUSE
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 1–58； UniProt 763–820

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	2ix7
Deposition date deposition_date	2006-07-07
Structure title title	Structure of apo-calmodulin bound to unconventional myosin V
Keywords keywords	;CONTRACTILE PROTEIN/METAL BINDING, ACTIN-BINDING, UBL CONJUGATION, CA2+ REGULATION, MYOSIN, CALCIUM, IQ MOTIF, CALMODULIN, ACETYLATION, NUCLEOTIDE- BINDING, CONTRACTILE PROTEIN, COMPLEX, PHOSPHORYLATION, CALMODULIN-BINDING, METAL BINDING, METHYLATION, COILED COIL, ATP-BINDING, MOTOR PROTEIN, CONTRACTILE PROTEIN-METAL BINDING complex ;; CONTRACTILE PROTEIN/METAL BINDING
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.

2ix7__assembly_1__model_1

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

Download this curve (.dat)

2ix7__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2ix7__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.81 Å
Rg (electron density)	24.99 Å
Total Rg	25.65 Å
Atom count	2791
Residues	348
Excluded volume	48804 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2ix7__assembly_1__model_1`	trimeric （3）	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 (5)

Entity 1 Entity 1 polymer

Description description	CALMODULIN
Molecular weight formula_weight	16450.0 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	2935

DQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTIDFPEFLTMMARKMKDTDSEEEIREAFRVFDKDGNGYISAAELRHVMTNLGEKLTDEEVDEMIREADIDGDGQVNYEEFVQMMT

Source Source

Source organism organism	MUS MUSCULUS
Common name common_name	HOUSE MOUSE
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 polymer

Description description	MYOSIN-5A
Molecular weight formula_weight	6923.4 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

ADKLRAACIRIQKTIRGWLLRKRYLCMQRAAITVQRYVRGYQARCYAKFLRRTKAATT

Source Source

Source organism organism	MUS MUSCULUS
Common name common_name	HOUSE MOUSE
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	ESCHERICHIA COLI

Entity 3 Entity 3 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 4 Entity 4 non-polymer

Description description	CYSTEINE
Molecular weight formula_weight	121.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	144

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6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2ix7a_
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.39.1.5 — Calmodulin-like

Domain ID domain_id	d2ix7b_
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.39.1.5 — Calmodulin-like

CATH v4.4 (5 domains)

Domain ID domain_id	2ix7A01
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	2ix7A02
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	2ix7B01
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	2ix7B02
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	2ix7C00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	190 —

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Unit-cell length a length_a	112.000 Å
Unit-cell length b length_b	112.000 Å
Unit-cell length c length_c	102.340 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 32 2 1
Space-group number int_tables_number	154
Crystal system crystal_system	—

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	29.800 Å
R factor r_factor	0.2160
R_work r_work	0.2160
R_free r_free	0.2590

Structure of apo-calmodulin bound to unconventional myosin V

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

CALMODULIN

State in the Current Structure

Other States of the Same Protein in the Database

MYOSIN-5A

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

2ix7__assembly_1__model_1

2ix7__assembly_1__model_1 | I(q)

2ix7__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (2 domains)

CATH v4.4 (5 domains)

7. Citations (1)

Structure of apo-calmodulin bound to unconventional myosin V

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

CALMODULIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

MYOSIN-5A

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

2ix7__assembly_1__model_1

2ix7__assembly_1__model_1 | I(q)

2ix7__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (2 domains)

CATH v4.4 (5 domains)

7. Citations (1)