SAXSdb — 6dad

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

Calmodulin-1

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	Voltage-dependent L-type calcium channel subunit alpha-1C × 1 （Q13936） CALCIUM ION × 3 water × 2	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	Voltage-dependent L-type calcium channel subunit alpha-1C × 1 （Q13936） CALCIUM ION × 3 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CALM1_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–148； UniProt 2–149 Author chain B； PDBConstruct 1–148； UniProt 2–149

Voltage-dependent L-type calcium channel subunit alpha-1C

Homo sapiens

UniProt Q13936

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	Calmodulin-1 × 1 （P0DP23） CALCIUM ION × 3 water × 2	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	Calmodulin-1 × 1 （P0DP23） CALCIUM ION × 3 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CAC1C_HUMAN
Isoform	Q13936-37
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 4–37； UniProt 1611–1644 Author chain D； PDBConstruct 4–37； UniProt 1611–1644

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	6dad
Deposition date deposition_date	2018-05-01
Structure title title	1.65 Angstrom crystal structure of the N97I Ca/CaM:CaV1.2 IQ domain complex
Keywords keywords	calmodulin, mutant, complex, CALCIUM BINDING PROTEIN-MEMBRANE PROTEIN complex; CALCIUM BINDING 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.

6dad__assembly_1__model_1

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

Download this curve (.dat)

6dad__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

6dad__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	17.16 Å
Rg (electron density)	15.74 Å
Total Rg	16.70 Å
Atom count	1270
Residues	169
Excluded volume	22362 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`6dad__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`6dad__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	Calmodulin-1
Molecular weight formula_weight	16720.4 kDa
Mutation mutation	N97I
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	2901

ADQLTEEQIAEFKEAFSLFDKDGDGTITTKELGTVMRSLGQNPTEAELQDMINEVDADGNGTIDFPEFLTMMARKMKDTDSEEEIREAFRVFDKDGIGYISAAELRHVMTNLGEKLTDEEVDEMIREADIDGDGQVNYEEFVQMMTAK

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Voltage-dependent L-type calcium channel subunit alpha-1C
Molecular weight formula_weight	4319.0 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,D

SNADEVTVGKFYATFLIQEYFRKFKKRKEQGLVGKPS

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

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	6

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	230

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d6dada_
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	d6dadb_
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 (2 domains)

Domain ID domain_id	6dadA01
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	6dadB01
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	65.273 Å
Unit-cell length b length_b	69.045 Å
Unit-cell length c length_c	85.792 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	8

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.650 Å
Low-resolution limit resolution_low	41.511 Å
R factor r_factor	0.1818
R_work r_work	0.1804
R_free r_free	0.2084

1.65 Angstrom crystal structure of the N97I Ca/CaM:CaV1.2 IQ domain complex

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

Calmodulin-1

State in the Current Structure

Other States of the Same Protein in the Database

Voltage-dependent L-type calcium channel subunit alpha-1C

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

6dad__assembly_1__model_1

6dad__assembly_1__model_1 | I(q)

6dad__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

1.65 Angstrom crystal structure of the N97I Ca/CaM:CaV1.2 IQ domain complex

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

Calmodulin-1

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Voltage-dependent L-type calcium channel subunit alpha-1C

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

6dad__assembly_1__model_1

6dad__assembly_1__model_1 | I(q)

6dad__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)