Annotations: 1L2O

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1l2oa1	All beta proteins	SH3-like barrel	Myosin S1 fragment, N-terminal domain	Myosin S1 fragment, N-terminal domain	Myosin S1 fragment, N-terminal domain	(Argopecten irradians ) [TaxId: 31199 ],	SCOPe (2.08)
A	d1l2oa2	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	Motor proteins	Myosin S1, motor domain	(Argopecten irradians ) [TaxId: 31199 ],	SCOPe (2.08)
B	d1l2ob_	All alpha proteins	EF Hand-like	EF-hand	Calmodulin-like	Myosin Essential Chain	(Argopecten irradians ) [TaxId: 31199 ],	SCOPe (2.08)
C	d1l2oc_	All alpha proteins	EF Hand-like	EF-hand	Calmodulin-like	Myosin Regulatory Chain	(Argopecten irradians ) [TaxId: 31199 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	P-loop motor domain	8042777	3002036	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Myosin s1 fragment, N-terminal domain	8042775	3000319	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	EF-hand	8037349	3001983	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	EF-hand	8037362	3001983	SCOP2B (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	ERG4_ERG24	e1l2oA4	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: N-terminal domain of Delta(14)-sterol reductase, MaSR1	F: ERG4_ERG24	ECOD (v294.1)
A	Peptidase_M99_C	e1l2oA1	A: a/b three-layered sandwiches	X: Rubredoxin-like	H: Rubredoxin-related	T: Rubredoxin-related	F: Peptidase_M99_C	ECOD (v294.1)
B	Pyr_redox_2	e1l2oB1	A: a/b three-layered sandwiches	X: UBC-like	H: UBC-like	T: Concanavalin A-like lectins/glucanases	F: Pyr_redox_2	ECOD (v294.1)
C	EF-hand_1, EF-hand_6, EF-hand_7	e1l2oC3	A: a/b three-layered sandwiches	X: Fusion glycoprotein F2	H: RIFT-related	T: double psi	F: EF-hand_1, EF-hand_6, EF-hand_7	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.30.360	Mainly Beta	Roll	SH3 type barrels.	Myosin S1 fragment, N-terminal	CATH (utative)
A	1.20.58.530	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (utative)
B	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)
C	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	MYOSIN HEAVY CHAIN	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding cytoskeletal protein binding actin binding protein-containing complex binding protein binding actin filament binding structural molecule activity structural constituent of muscle calmodulin binding polypeptide conformation or assembly isomerase activity isomerase activity cytoskeletal motor activity microfilament motor activity macromolecular conformation isomerase activity catalytic activity ATP-dependent activity	locomotion 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 multicellular organismal process system process muscle contraction muscle system process locomotion 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 multicellular organismal process system process muscle contraction muscle system process cellular developmental process cellular component assembly involved in morphogenesis cell development membraneless organelle assembly muscle cell differentiation cellular component biogenesis muscle structure development striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly muscle cell development cell differentiation anatomical structure development developmental process actomyosin structure organization organelle assembly anatomical structure morphogenesis myofibril assembly anatomical structure formation involved in morphogenesis striated muscle cell differentiation	protein-containing complex intracellular anatomical structure intracellular membraneless organelle actin cytoskeleton myosin complex intracellular organelle cellular anatomical structure cytoskeleton organelle membraneless organelle myosin II complex contractile muscle fiber cytoplasm supramolecular fiber protein-containing complex intracellular anatomical structure intracellular membraneless organelle actin cytoskeleton myosin complex intracellular organelle cellular anatomical structure cytoskeleton organelle membraneless organelle myosin II complex contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex myosin filament
B	MYOSIN REGULATORY LIGHT CHAIN	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding	-	intracellular organelle protein-containing complex cellular anatomical structure intracellular anatomical structure cytoskeleton organelle membraneless organelle intracellular membraneless organelle actin cytoskeleton myosin complex
C	MYOSIN ESSENTIAL LIGHT CHAIN	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding	-	protein-containing complex intracellular anatomical structure intracellular membraneless organelle actin cytoskeleton myosin complex intracellular organelle cellular anatomical structure cytoskeleton organelle membraneless organelle contractile muscle fiber myosin II complex cytoplasm supramolecular fiber protein-containing complex intracellular anatomical structure intracellular membraneless organelle actin cytoskeleton myosin complex intracellular organelle cellular anatomical structure cytoskeleton organelle membraneless organelle contractile muscle fiber myosin II complex cytoplasm supramolecular fiber muscle myosin complex supramolecular polymer supramolecular complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036961	Kinesin motor domain superfamily	Homologous Superfamily
A	IPR004009	Myosin, SH3 domain	Domain
A	IPR014751	DNA repair protein XRCC4-like, C-terminal	Homologous Superfamily
A	IPR001609	Myosin head, motor domain-like	Domain
A	IPR002928	Myosin tail	Domain
A	IPR008989	Myosin S1 fragment, N-terminal	Homologous Superfamily
A	IPR000048	IQ motif, EF-hand binding site	Binding Site
A	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
B	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
B	IPR002048	EF-hand domain	Domain
B	IPR011992	EF-hand domain pair	Homologous Superfamily
B	IPR050403	Myosin regulatory light chain	Family
C	IPR050230	Calmodulin/Myosin light chain/Troponin C-like	Family
C	IPR002048	EF-hand domain	Domain
C	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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.