Annotations: 4PUS

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4pusa1	All alpha proteins	Influenza virus matrix protein M1	Influenza virus matrix protein M1	Influenza virus matrix protein M1	automated matches	(Influenza A virus (A/Wilson-Smith/1933(H1N1)) ) [TaxId: 381518 ],	SCOPe (2.08)
A	d4pusa2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Influenza A virus (A/Wilson-Smith/1933(H1N1)) ) [TaxId: 381518 ],	SCOPe (2.08)
B	d4pusb_	All alpha proteins	Influenza virus matrix protein M1	Influenza virus matrix protein M1	Influenza virus matrix protein M1	automated matches	(Influenza A virus (A/Wilson-Smith/1933(H1N1)) ) [TaxId: 381518 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Flu_M1	e4pusA1	A: alpha complex topology	X: Influenza virus matrix protein M1 (From Topology)	H: Influenza virus matrix protein M1 (From Topology)	T: Influenza virus matrix protein M1	F: Flu_M1	ECOD (1.6)
B	Flu_M1	e4pusB1	A: alpha complex topology	X: Influenza virus matrix protein M1 (From Topology)	H: Influenza virus matrix protein M1 (From Topology)	T: Influenza virus matrix protein M1	F: Flu_M1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.91.10	Mainly Alpha	Up-down Bundle	Influenza Virus Matrix Protein	Chain A, domain 1	CATH (4.3.0)
A	1.10.10.180	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Influenza matrix protein M1, N-terminal subdomain 2	CATH (4.3.0)
B	1.20.91.10	Mainly Alpha	Up-down Bundle	Influenza Virus Matrix Protein	Chain A, domain 1	CATH (4.3.0)
B	1.10.10.180	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Influenza matrix protein M1, N-terminal subdomain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF08289	Influenza Matrix protein (M1) C-terminal domain (Flu_M1_C)	Influenza Matrix protein (M1) C-terminal domain	This region is thought to be a second domain of the M1 matrix protein.	Domain
A, B	PF00598	Influenza Matrix protein (M1) (Flu_M1)	Influenza Matrix protein (M1)	This protein forms a continuous shell on the inner side of the lipid bilayer, but its function is unclear.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Matrix protein 1	structural constituent of virion structural molecule activity RNA binding binding organic cyclic compound binding nucleic acid binding	biological process involved in interspecies interaction between organisms non-lytic viral release viral budding viral life cycle biological process involved in interaction with host biological process involved in symbiotic interaction virion assembly exit from host cell viral process viral budding from plasma membrane viral release from host cell	host intracellular membrane-bounded organelle host cellular component host intracellular part host cell part host intracellular region cellular anatomical entity host cell nucleus host intracellular organelle membrane virion component virion membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR015799	Influenza matrix M1, N-terminal subdomain 2	Homologous Superfamily
A, B	IPR013188	Influenza matrix M1, C-terminal	Domain
A, B	IPR001561	Influenza matrix M1, N-terminal	Domain
A, B	IPR015423	Influenza matrix M1, N-terminal subdomain 1	Homologous Superfamily
A, B	IPR037533	Matrix protein 1	Family
A, B	IPR036039	Influenza virus matrix protein M1	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B	OPM	Monotopic/peripheral	All alpha monotopic/peripheral	Retroviral matrix protein	Influenza virus matrix protein M1

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.