SAXSdb — 1d7m

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

CORTEXILLIN I

Dictyostelium discoideum

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 4	water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	O15813_DICDI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–101； UniProt 243–343 Author chain B； PDBConstruct 1–101； UniProt 243–343

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	1d7m
Deposition date deposition_date	1999-10-19
Structure title title	COILED-COIL DIMERIZATION DOMAIN FROM CORTEXILLIN I
Keywords keywords	COILED-COIL, COILED-COIL TRIGGER SITE, ALPHA HELIX, DIMERIZATION, CONTRACTILE PROTEIN; CONTRACTILE 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.

1d7m__assembly_1__model_1

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

Download this curve (.dat)

1d7m__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1d7m__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	40.74 Å
Rg (electron density)	42.83 Å
Total Rg	41.93 Å
Atom count	1622
Residues	202
Excluded volume	28994 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1d7m__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1d7m__assembly_2__model_1`	tetrameric （4）	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 (2)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1d7ma_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.10 — Coiled-coil dimerization domain from cortexillin I
Family Family family	h.1.10.1 — Coiled-coil dimerization domain from cortexillin I

Domain ID domain_id	d1d7mb_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.10 — Coiled-coil dimerization domain from cortexillin I
Family Family family	h.1.10.1 — Coiled-coil dimerization domain from cortexillin I

CATH v4.4 (2 domains)

Domain ID domain_id	1d7mA00
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	340 —

Domain ID domain_id	1d7mB00
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	340 —

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Unit-cell length a length_a	70.420 Å
Unit-cell length b length_b	128.650 Å
Unit-cell length c length_c	91.570 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	16

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	2.700 Å
Low-resolution limit resolution_low	37.300 Å
R factor r_factor	0.2050
R_work r_work	0.2050
R_free r_free	0.2490

Description description	CORTEXILLIN I
Molecular weight formula_weight	11623.3 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	1715

COILED-COIL DIMERIZATION DOMAIN FROM CORTEXILLIN I

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

CORTEXILLIN I

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

1d7m__assembly_1__model_1

1d7m__assembly_1__model_1 | I(q)

1d7m__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (2)

Source organism organism	Dictyostelium discoideum
NCBI taxonomy ID ncbi_taxonomy_id	44689
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	93

COILED-COIL DIMERIZATION DOMAIN FROM CORTEXILLIN I

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

CORTEXILLIN I

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

1d7m__assembly_1__model_1

1d7m__assembly_1__model_1 | I(q)

1d7m__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (2)