SAXSdb — 1ea3

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

MATRIX PROTEIN M1

INFLUENZA A VIRUS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	VMT1_IAPUE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–164； UniProt 1–164 Author chain B； PDBConstruct 1–164； UniProt 1–164

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	1ea3
Deposition date deposition_date	2000-11-03
Structure title title	Influenza virus M1 protein
Keywords keywords	INFLUENZA VIRUS, MATRIX PROTEIN; INFLUENZA VIRUS
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.

1ea3__assembly_1__model_1

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

Download this curve (.dat)

1ea3__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ea3__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	16.19 Å
Rg (electron density)	14.68 Å
Total Rg	15.87 Å
Atom count	1209
Residues	157
Excluded volume	21795 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ea3__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1ea3__assembly_2__model_1`	monomeric （1）	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) 6 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1ea3a_
Class class	a — All alpha proteins
Fold Fold fold	a.95 — Influenza virus matrix protein M1
Superfamily Superfamily superfamily	a.95.1 — Influenza virus matrix protein M1
Family Family family	a.95.1.1 — Influenza virus matrix protein M1

Domain ID domain_id	d1ea3b_
Class class	a — All alpha proteins
Fold Fold fold	a.95 — Influenza virus matrix protein M1
Superfamily Superfamily superfamily	a.95.1 — Influenza virus matrix protein M1
Family Family family	a.95.1.1 — Influenza virus matrix protein M1

CATH v4.4 (4 domains)

Domain ID domain_id	1ea3A01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	91 — Influenza Virus Matrix Protein; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Influenza matrix M1, N-terminal subdomain 1

Domain ID domain_id	1ea3A02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	180 — Influenza matrix protein M1, N-terminal subdomain 2

Domain ID domain_id	1ea3B01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	91 — Influenza Virus Matrix Protein; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Influenza matrix M1, N-terminal subdomain 1

Domain ID domain_id	1ea3B02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	180 — Influenza matrix protein M1, N-terminal subdomain 2

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Unit-cell length a length_a	36.860 Å
Unit-cell length b length_b	44.147 Å
Unit-cell length c length_c	47.692 Å
Unit-cell angle α angle_alpha	77.10 °
Unit-cell angle β angle_beta	67.83 °
Unit-cell angle γ angle_gamma	77.60 °
Molecules per unit cell Z z_pdb	2

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

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	14.980 Å
R factor r_factor	0.2420
R_work r_work	0.2420
R_free r_free	0.3130

Description description	MATRIX PROTEIN M1
Molecular weight formula_weight	18208.1 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	2499

Influenza virus M1 protein

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

MATRIX PROTEIN M1

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

1ea3__assembly_1__model_1

1ea3__assembly_1__model_1 | I(q)

1ea3__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) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Source organism organism	INFLUENZA A VIRUS
NCBI taxonomy ID ncbi_taxonomy_id	11320
Host organism host_organism	ESCHERICHIA COLI BL21(DE3)

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	81

Influenza virus M1 protein

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

MATRIX PROTEIN M1

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

1ea3__assembly_1__model_1

1ea3__assembly_1__model_1 | I(q)

1ea3__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) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)