5W1A

The first X-ray crystal structure of an insect muscle myosin. Drosophila melanogaster, skeletal muscle myosin II, an embryonic isoform, subfragment-1

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	EF-hand	8062937	3001983	SCOP2B (2022-06-29)
D	SCOP2 Family	Calmodulin-like	8062936	4000924	SCOP2 (2022-06-29)
D	SCOP2 Superfamily	EF-hand	8062937	3001983	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Myosin_N	e5w1aA1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: Myosin_N	ECOD (1.6)
A	IQ_2	e5w1aA3	A: alpha bundles	X: Myosin VI lever arm (From Topology)	H: Myosin VI lever arm (From Topology)	T: Myosin VI lever arm	F: IQ_2	ECOD (1.6)
A	Myosin_head	e5w1aA2	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Myosin_head	ECOD (1.6)
C	Myosin_N	e5w1aC2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: Myosin_N	ECOD (1.6)
C	IQ_2	e5w1aC3	A: alpha bundles	X: Myosin VI lever arm (From Topology)	H: Myosin VI lever arm (From Topology)	T: Myosin VI lever arm	F: IQ_2	ECOD (1.6)
C	Myosin_head	e5w1aC1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Myosin_head	ECOD (1.6)
B	EF-hand_7_8	e5w1aB2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
B	EF-hand_7_4	e5w1aB1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_4	ECOD (1.6)
D	EF-hand_7_8	e5w1aD1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
D	EF-hand_7_4	e5w1aD2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_4	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)
D	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C	PF02736	Myosin N-terminal SH3-like domain (Myosin_N)	Myosin N-terminal SH3-like domain	This domain has an SH3-like fold. It is found at the N-terminus of many but not all myosins. The function of this domain is unknown.	Domain
A, C	PF00063	Myosin head (motor domain) (Myosin_head)	Myosin head (motor domain)	-	Domain
B, D	PF13499	EF-hand domain pair (EF-hand_7)	EF-hand domain pair	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C	Myosin heavy chain, muscle	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding structural molecule activity structural constituent of muscle adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding structural molecule activity structural constituent of muscle adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding identical protein binding protein homodimerization activity protein dimerization activity calmodulin binding cytoskeletal motor activity microfilament motor activity ATP-dependent activity	regulation of protein stability biological regulation regulation of biological quality protein stabilization muscle structure development developmental process somatic muscle development anatomical structure development adult somatic muscle development cellular component organization organelle organization actin cytoskeleton organization actin filament-based process myosin filament organization regulation of protein stability biological regulation regulation of biological quality protein stabilization muscle structure development developmental process somatic muscle development anatomical structure development adult somatic muscle development cellular component organization organelle organization actin cytoskeleton organization actin filament-based process myosin filament organization cellular process cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization animal organ development muscle organ development flight locomotion multicellular organismal process epithelial cell migration, open tracheal system epithelium migration multicellular organism development tissue migration ameboidal-type cell migration respiratory system development epithelial cell migration cell migration open tracheal system development cell motility system development regulation of cytoskeleton organization regulation of cellular component organization regulation of cellular process regulation of actin filament-based process myosin filament assembly myosin II filament assembly cellular component biogenesis regulation of myosin II filament assembly regulation of protein-containing complex assembly cellular component assembly protein-containing complex assembly regulation of biological process protein-containing complex organization regulation of myosin II filament organization regulation of cellular component biogenesis regulation of organelle organization myosin II filament organization regulation of actin cytoskeleton organization regulation of supramolecular fiber organization cellular developmental process cell differentiation muscle cell differentiation system process muscle contraction muscle system process cellular component assembly involved in morphogenesis non-membrane-bounded organelle assembly cell development striated muscle cell development cellular anatomical entity morphogenesis muscle cell development muscle thin filament assembly actomyosin structure organization organelle assembly actin filament organization anatomical structure morphogenesis myofibril assembly anatomical structure formation involved in morphogenesis striated muscle cell differentiation sexual reproduction reproductive process cellular process involved in reproduction in multicellular organism developmental process involved in reproduction female gamete generation epithelial cell differentiation gamete generation follicle cell of egg chamber development epithelium development oogenesis multicellular organismal reproductive process follicle cell of egg chamber migration tissue development epithelial cell development border follicle cell migration germ cell development sarcomere organization	intracellular anatomical structure myofilament myosin filament cellular anatomical entity sarcomere intracellular organelle striated muscle myosin thick filament organelle intracellular non-membrane-bounded organelle contractile muscle fiber supramolecular fiber cytoplasm supramolecular polymer supramolecular complex intracellular anatomical structure myofilament myosin filament cellular anatomical entity sarcomere intracellular organelle striated muscle myosin thick filament organelle intracellular non-membrane-bounded organelle contractile muscle fiber supramolecular fiber cytoplasm supramolecular polymer supramolecular complex myofibril non-membrane-bounded organelle polytene chromosome chromosome chromosomal region polytene chromosome puff protein-containing complex actin cytoskeleton myosin complex cytoskeleton myosin II complex A band
B, D	Myosin light chain alkali	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding myosin heavy chain binding cytoskeletal protein binding protein binding myosin binding enzyme regulator activity molecular function regulator activity	multicellular organismal process system process muscle contraction muscle system process regulation of molecular function regulation of catalytic activity biological regulation developmental process anatomical structure development tissue development mesoderm development	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol protein-containing complex actin cytoskeleton myosin complex intracellular organelle cytoskeleton organelle intracellular non-membrane-bounded organelle contractile muscle fiber myosin II complex supramolecular fiber intracellular anatomical structure cytoplasm cellular anatomical entity cytosol protein-containing complex actin cytoskeleton myosin complex intracellular organelle cytoskeleton organelle intracellular non-membrane-bounded organelle contractile muscle fiber myosin II complex supramolecular fiber muscle myosin complex supramolecular polymer supramolecular complex non-membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C	IPR036961	Kinesin motor domain superfamily	Homologous Superfamily
A, C	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A, C	IPR014751	DNA repair protein XRCC4-like, C-terminal	Homologous Superfamily
A, C	IPR001609	Myosin head, motor domain	Domain
A, C	IPR002928	Myosin tail	Domain
A, C	IPR004009	Myosin, N-terminal, SH3-like	Domain
A, C	IPR008989	Myosin S1 fragment, N-terminal	Homologous Superfamily
B, D	IPR050230	Calcium-Regulated Muscle Contraction and Cellular Process	Family
B, D	IPR002048	EF-hand domain	Domain
B, D	IPR011992	EF-hand domain pair	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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.