4iq4

Structure of a 16 nm protein cage designed by fusing symmetric oligomeric domains, triple mutant, P21212 form

Method: X-RAY DIFFRACTION

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

Non-haem bromoperoxidase BPO-A2, Matrix protein 1

Influenza A virus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Homooligomer	Protein 12	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	M1_I34A1
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 287–449； UniProt 3–165 Author chain B； PDBConstruct 287–449； UniProt 3–165 Author chain C； PDBConstruct 287–449； UniProt 3–165 Author chain D； PDBConstruct 287–449； UniProt 3–165 Author chain E； PDBConstruct 287–449； UniProt 3–165 Author chain F； PDBConstruct 287–449； UniProt 3–165

Non-haem bromoperoxidase BPO-A2, Matrix protein 1

Influenza A virus

UniProt P29715

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Homooligomer	Protein 12	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BPOA2_STRAU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–278； UniProt 1–278 Author chain B； PDBConstruct 1–278； UniProt 1–278 Author chain C； PDBConstruct 1–278； UniProt 1–278 Author chain D； PDBConstruct 1–278； UniProt 1–278 Author chain E； PDBConstruct 1–278； UniProt 1–278 Author chain F； PDBConstruct 1–278； UniProt 1–278

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	4iq4
Deposition date deposition_date	2013-01-10
Structure title title	Structure of a 16 nm protein cage designed by fusing symmetric oligomeric domains, triple mutant, P21212 form
Keywords keywords	protein design, bionanotechnology, protein assembly, symmetric oligomeric domains, biomaterials, OXIDOREDUCTASE; OXIDOREDUCTASE
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.

4iq4__assembly_1__model_1

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

Download this curve (.dat)

4iq4__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4iq4__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	57.26 Å
Rg (electron density)	56.52 Å
Total Rg	56.53 Å
Atom count	40776
Residues	5280
Excluded volume	724030 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4iq4__assembly_1__model_1`	dodecameric （12）	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 (1)

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6. Fold Classification (SCOP + CATH) 18 domains

CATH v4.4 (18 domains)

Domain ID domain_id	4iq4A01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1820 — Alpha/Beta hydrolase fold, catalytic domain

Domain ID domain_id	4iq4A02
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	4iq4A03
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	4iq4B01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1820 — Alpha/Beta hydrolase fold, catalytic domain

Domain ID domain_id	4iq4B02
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	4iq4B03
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	4iq4C01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1820 — Alpha/Beta hydrolase fold, catalytic domain

Domain ID domain_id	4iq4C02
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	4iq4C03
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	4iq4D01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1820 — Alpha/Beta hydrolase fold, catalytic domain

Domain ID domain_id	4iq4D02
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	4iq4D03
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	4iq4E01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1820 — Alpha/Beta hydrolase fold, catalytic domain

Domain ID domain_id	4iq4E02
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	4iq4E03
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	4iq4F01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1820 — Alpha/Beta hydrolase fold, catalytic domain

Domain ID domain_id	4iq4F02
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	4iq4F03
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	126.710 Å
Unit-cell length b length_b	137.870 Å
Unit-cell length c length_c	171.780 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	24

Space group space_group	P 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	3.495 Å
Low-resolution limit resolution_low	93.294 Å
R factor r_factor	0.2011
R_work r_work	0.1995
R_free r_free	0.2311

Description description	Non-haem bromoperoxidase BPO-A2, Matrix protein 1
Molecular weight formula_weight	50281.4 kDa
EC 编号 ec_number	1.11.1.-
Mutation mutation	K118A, L279Q, Q24T
Source method src_method	man
Copy count entity_count	6

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F
Atom count atom_count	20388

Structure of a 16 nm protein cage designed by fusing symmetric oligomeric domains, triple mutant, P21212 form

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

Non-haem bromoperoxidase BPO-A2, Matrix protein 1

State in the Current Structure

Other States of the Same Protein in the Database

Non-haem bromoperoxidase BPO-A2, Matrix protein 1

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

4iq4__assembly_1__model_1

4iq4__assembly_1__model_1 | I(q)

4iq4__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 18 domains

CATH v4.4 (18 domains)

7. Citations (1)

Source organism organism	Influenza A virus
NCBI taxonomy ID ncbi_taxonomy_id	211044
Host organism host_organism	Escherichia coli

Structure of a 16 nm protein cage designed by fusing symmetric oligomeric domains, triple mutant, P21212 form

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

Non-haem bromoperoxidase BPO-A2, Matrix protein 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

Non-haem bromoperoxidase BPO-A2, Matrix protein 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

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

4iq4__assembly_1__model_1

4iq4__assembly_1__model_1 | I(q)

4iq4__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 18 domains

CATH v4.4 (18 domains)

7. Citations (1)