SAXSdb — 3cp1

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

Transmembrane Protein

Human immunodeficiency virus 1

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ENV_HV1LW
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–44； UniProt 536–579 Author chain A； PDBConstruct 51–86； UniProt 628–663

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	3cp1
Deposition date deposition_date	2008-03-30
Structure title title	Structure of a longer thermalstable core domain of HIV-1 gp41 containing the enfuvirtide resistance mutation N43D
Keywords keywords	;HIV-1 ENVELOPE GLYCOPROTEIN, 6-helix bundle, gp41, N43D, AIDS, Apoptosis, Coiled coil, Envelope protein, Fusion protein, Host-virus interaction, Membrane, Transmembrane, Virion, VIRAL PROTEIN ;; VIRAL 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.

3cp1__assembly_1__model_1

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

Download this curve (.dat)

3cp1__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3cp1__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	19.39 Å
Rg (electron density)	18.67 Å
Total Rg	19.62 Å
Atom count	1818
Residues	219
Excluded volume	32038 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3cp1__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 (2)

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6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d3cp1a_
Class class	h — Coiled coil proteins
Fold Fold fold	h.3 — Stalk segment of viral fusion proteins
Superfamily Superfamily superfamily	h.3.2 — Virus ectodomain
Family Family family	h.3.2.1 — Virus ectodomain

CATH v4.4 (1 domains)

Domain ID domain_id	3cp1A00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	210 —

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Unit-cell length a length_a	59.517 Å
Unit-cell length b length_b	59.517 Å
Unit-cell length c length_c	59.517 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	12

Space group space_group	P 21 3
Space-group number int_tables_number	198
Crystal system crystal_system	—

Resolution resolution	2.000 Å
Low-resolution limit resolution_low	19.840 Å
R factor r_factor	—
R_work r_work	0.2490
R_free r_free	0.2860

Description description	Transmembrane Protein
Molecular weight formula_weight	9975.1 kDa
Mutation mutation	N43D
Source method src_method	man
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	628

Structure of a longer thermalstable core domain of HIV-1 gp41 containing the enfuvirtide resistance mutation N43D

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

Transmembrane Protein

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

3cp1__assembly_1__model_1

3cp1__assembly_1__model_1 | I(q)

3cp1__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)

Source organism organism	Human immunodeficiency virus 1
NCBI taxonomy ID ncbi_taxonomy_id	11676
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	22

Structure of a longer thermalstable core domain of HIV-1 gp41 containing the enfuvirtide resistance mutation N43D

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

Transmembrane Protein

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

3cp1__assembly_1__model_1

3cp1__assembly_1__model_1 | I(q)

3cp1__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)