SAXSdb — 3bkd

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

Transmembrane Domain of Matrix protein M2

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	octyl beta-D-glucopyranoside × 3 CHLORIDE ION × 1 DI(HYDROXYETHYL)ETHER × 2 water × 4	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 4	octyl beta-D-glucopyranoside × 3 CHLORIDE ION × 1 DI(HYDROXYETHYL)ETHER × 4 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9Q0P0_9INFA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–25； UniProt 22–46 Author chain B； PDBConstruct 1–25； UniProt 22–46 Author chain C； PDBConstruct 1–25； UniProt 22–46 Author chain D； PDBConstruct 1–25； UniProt 22–46 Author chain E； PDBConstruct 1–25； UniProt 22–46 Author chain F； PDBConstruct 1–25； UniProt 22–46 Author chain G； PDBConstruct 1–25； UniProt 22–46 Author chain H； PDBConstruct 1–25； UniProt 22–46

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	3bkd
Deposition date deposition_date	2007-12-06
Structure title title	High resolution Crystal structure of Transmembrane domain of M2 protein
Keywords keywords	Proton channel, M2TM, Influenza A virus M2 Protein, VIRAL PROTEIN, MEMBRANE PROTEIN; VIRAL 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.

3bkd__assembly_2__model_1

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

Download this curve (.dat)

3bkd__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3bkd__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	15.38 Å
Rg (electron density)	14.30 Å
Total Rg	15.58 Å
Atom count	861
Residues	96
Excluded volume	16330 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3bkd__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3bkd__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 (5)

Entity 1 Entity 1 polymer

Description description	Transmembrane Domain of Matrix protein M2
Molecular weight formula_weight	2793.2 kDa
Source method src_method	syn
Copy count entity_count	8

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H
Atom count atom_count	1764

SSDPLVVAASIMGILHLILWILDRLX

Entity 2 Entity 2 non-polymer

Description description	octyl beta-D-glucopyranoside
Molecular weight formula_weight	292.4 kDa
Source method src_method	man
Copy count entity_count	6

Entity 3 Entity 3 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	DI(HYDROXYETHYL)ETHER
Molecular weight formula_weight	106.1 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	39

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d3bkda1
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d3bkdb1
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d3bkdc1
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d3bkdd1
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d3bkde1
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d3bkdf1
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d3bkdg1
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

Domain ID domain_id	d3bkdh1
Class class	j — Peptides
Fold Fold fold	j.35 — Transmembrane helical fragments
Superfamily Superfamily superfamily	j.35.1 — Transmembrane helical fragments
Family Family family	j.35.1.1 — Transmembrane helical fragments

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Unit-cell length a length_a	38.753 Å
Unit-cell length b length_b	56.557 Å
Unit-cell length c length_c	56.009 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	103.53 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	16

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.050 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2216
R_work r_work	0.2191
R_free r_free	0.2687

High resolution Crystal structure of Transmembrane domain of M2 protein

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

Transmembrane Domain of Matrix protein M2

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

3bkd__assembly_2__model_1

3bkd__assembly_2__model_1 | I(q)

3bkd__assembly_2__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

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (8 domains)

7. Citations (1)

High resolution Crystal structure of Transmembrane domain of M2 protein

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

Transmembrane Domain of Matrix protein M2

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

3bkd__assembly_2__model_1

3bkd__assembly_2__model_1 | I(q)

3bkd__assembly_2__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

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (8 domains)

7. Citations (1)