Annotations: 8ACT

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
E	SCOP2B Superfamily	EF-hand	8062891	3001983	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	EF-hand	8062891	3001983	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	EF-hand	8062875	3001983	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	EF-hand	8062875	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)
E		e8actE1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F:	ECOD (develop294)
F	Peptidase_C30	e8actF1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Peptidase_C30	ECOD (develop294)
D	Peptidase_C30	e8actD1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Peptidase_C30	ECOD (develop294)
C		e8actC1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F:	ECOD (develop294)
A	PI3_PI4_kinase	e8actA01	A: alpha bundles	X: Rossmann-like	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PI3_PI4_kinase	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
E	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (utative)
F	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
E, F	PF13499	EF-hand domain pair (EF-hand_7)	EF-hand domain pair		Domain
A, B	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, B	PF00063	Myosin head (motor domain) (Myosin_head)	Myosin head (motor domain)		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E, F	Myosin regulatory light chain 2, ventricular/cardiac muscle isoform	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding structural molecule activity structural constituent of muscle myosin heavy chain binding cytoskeletal protein binding protein binding myosin binding actin monomer binding actin binding	developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development heart process system process regulation of biological process regulation of heart contraction regulation of system process biological regulation developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development heart process system process regulation of biological process regulation of heart contraction regulation of system process biological regulation circulatory system process regulation of blood circulation positive regulation of the force of heart contraction regulation of multicellular organismal process regulation of biological quality heart contraction regulation of the force of heart contraction blood circulation regulation of growth regulation of cellular component organization regulation of cellular process negative regulation of biological process growth negative regulation of cell growth regulation of cell growth cell growth cellular component organization negative regulation of growth negative regulation of cellular process cellular process cellular component organization or biogenesis cellular developmental process muscle cell fate specification muscle cell fate commitment cell fate specification muscle cell differentiation muscle structure development cell differentiation cell fate commitment muscle contraction regulation of muscle system process muscle system process striated muscle contraction regulation of striated muscle contraction regulation of muscle contraction cardiac muscle contraction cardiac muscle cell development cellular component assembly involved in morphogenesis cell development membraneless organelle assembly striated muscle tissue development cellular component biogenesis striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly muscle cell development actin filament-based process cardiac cell development muscle tissue development actomyosin structure organization actin cytoskeleton organization organelle assembly cardiac muscle tissue development cardiac muscle cell differentiation tissue development cardiocyte differentiation anatomical structure morphogenesis myofibril assembly organelle organization cardiac myofibril assembly anatomical structure formation involved in morphogenesis striated muscle cell differentiation supramolecular fiber organization cytoskeleton organization ventricular cardiac muscle tissue morphogenesis heart morphogenesis ventricular cardiac muscle tissue development cardiac chamber development animal organ morphogenesis muscle organ development cardiac chamber morphogenesis muscle tissue morphogenesis tissue morphogenesis cardiac ventricle morphogenesis cardiac muscle tissue morphogenesis cardiac ventricle development muscle organ morphogenesis post-embryonic development	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol intracellular organelle protein-containing complex cytoskeleton organelle membraneless organelle intracellular membraneless organelle actin cytoskeleton myosin complex sarcomere contractile muscle fiber cellular anatomical structure intracellular anatomical structure cytoplasm cytosol intracellular organelle protein-containing complex cytoskeleton organelle membraneless organelle intracellular membraneless organelle actin cytoskeleton myosin complex sarcomere contractile muscle fiber supramolecular fiber myofibril supramolecular polymer supramolecular complex cardiac myofibril A band
C, D	Myosin light chain 3	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding myosin heavy chain binding cytoskeletal protein binding myosin II heavy chain binding protein binding myosin II binding myosin binding structural molecule activity structural constituent of muscle cation binding ion binding binding calcium ion binding metal ion binding small molecule binding myosin heavy chain binding cytoskeletal protein binding myosin II heavy chain binding protein binding myosin II binding myosin binding structural molecule activity structural constituent of muscle cytoskeletal motor activity actin monomer binding actin binding	heart process multicellular organismal process system process regulation of biological process regulation of heart contraction regulation of system process biological regulation circulatory system process regulation of blood circulation regulation of multicellular organismal process regulation of biological quality heart contraction regulation of the force of heart contraction blood circulation heart process multicellular organismal process system process regulation of biological process regulation of heart contraction regulation of system process biological regulation circulatory system process regulation of blood circulation regulation of multicellular organismal process regulation of biological quality heart contraction regulation of the force of heart contraction blood circulation muscle contraction regulation of muscle system process muscle system process striated muscle contraction regulation of striated muscle contraction regulation of muscle contraction cardiac muscle contraction developmental process muscle structure development skeletal muscle organ development skeletal muscle tissue development anatomical structure development animal organ development muscle tissue development muscle organ development tissue development striated muscle tissue development ventricular cardiac muscle tissue morphogenesis heart morphogenesis multicellular organism development ventricular cardiac muscle tissue development cardiac chamber development animal organ morphogenesis system development heart development cardiac chamber morphogenesis cardiac muscle tissue development muscle tissue morphogenesis circulatory system development anatomical structure morphogenesis tissue morphogenesis cardiac ventricle morphogenesis cardiac muscle tissue morphogenesis cardiac ventricle development muscle organ morphogenesis	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 sarcomere contractile muscle fiber cytoplasm 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 sarcomere contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex muscle myosin complex cytosol A band I band
A, B	Myosin-7	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament 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 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	heart process multicellular organismal process system process regulation of biological process regulation of heart contraction regulation of system process biological regulation circulatory system process regulation of blood circulation regulation of multicellular organismal process regulation of biological quality heart contraction blood circulation regulation of heart rate heart process multicellular organismal process system process regulation of biological process regulation of heart contraction regulation of system process biological regulation circulatory system process regulation of blood circulation regulation of multicellular organismal process regulation of biological quality heart contraction blood circulation regulation of heart rate muscle contraction muscle system process striated muscle contraction nucleoside phosphate metabolic process ribose phosphate metabolic process purine nucleoside triphosphate metabolic process ATP metabolic process carbohydrate derivative metabolic process primary metabolic process nucleotide metabolic process purine-containing compound metabolic process nucleobase-containing compound metabolic process purine nucleotide metabolic process ribonucleotide metabolic process organophosphate metabolic process nucleobase-containing small molecule metabolic process purine ribonucleoside triphosphate metabolic process phosphate-containing compound metabolic process metabolic process cellular process small molecule metabolic process nucleoside triphosphate metabolic process purine ribonucleotide metabolic process phosphorus metabolic process regulation of the force of heart contraction regulation of muscle adaptation striated muscle adaptation response to stimulus transition between fast and slow fiber regulation of skeletal muscle adaptation regulation of muscle system process muscle adaptation regulation of response to stimulus skeletal muscle adaptation slow-twitch skeletal muscle fiber contraction twitch skeletal muscle contraction multicellular organismal movement musculoskeletal movement regulation of twitch skeletal muscle contraction regulation of skeletal muscle contraction regulation of slow-twitch skeletal muscle fiber contraction nervous system process neuromuscular process skeletal muscle contraction voluntary skeletal muscle contraction regulation of striated muscle contraction regulation of muscle contraction muscle filament sliding actin filament-based process actin-mediated cell contraction actin filament-based movement actin-myosin filament sliding cardiac muscle contraction developmental process heart development multicellular organism development anatomical structure development animal organ development adult heart development circulatory system development system development ventricular cardiac muscle tissue morphogenesis heart morphogenesis striated muscle tissue development muscle structure development ventricular cardiac muscle tissue development cardiac chamber development animal organ morphogenesis muscle tissue development muscle organ development cardiac chamber morphogenesis cardiac muscle tissue development tissue development muscle tissue morphogenesis anatomical structure morphogenesis tissue morphogenesis cardiac ventricle morphogenesis cardiac muscle tissue morphogenesis cardiac ventricle development muscle organ morphogenesis regulation of the force of skeletal muscle contraction regulation of skeletal muscle contraction by chemo-mechanical energy conversion muscle hypertrophy striated muscle hypertrophy cardiac muscle adaptation response to stress cardiac muscle hypertrophy cardiac muscle hypertrophy in response to stress muscle hypertrophy in response to stress	intracellular anatomical structure intracellular membraneless organelle Z disc sarcomere intracellular organelle I band cellular anatomical structure organelle membraneless organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer intracellular anatomical structure intracellular membraneless organelle Z disc sarcomere intracellular organelle I band cellular anatomical structure organelle membraneless organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex protein-containing complex actin cytoskeleton myosin complex cytoskeleton myosin II complex muscle myosin complex myosin filament actin filament bundle actomyosin stress fiber contractile actin filament bundle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
E, F	IPR002048	EF-hand domain	Domain
E, F	IPR011992	EF-hand domain pair	Homologous Superfamily
E, F	IPR050403	Myosin regulatory light chain	Family
E, F	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
C, D	IPR050230	Calmodulin/Myosin light chain/Troponin C-like	Family
C, D	IPR002048	EF-hand domain	Domain
C, D	IPR011992	EF-hand domain pair	Homologous Superfamily
A, B	IPR036961	Kinesin motor domain superfamily	Homologous Superfamily
A, B	IPR001609	Myosin head, motor domain-like	Domain
A, B	IPR000048	IQ motif, EF-hand binding site	Binding Site
A, B	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A, B	IPR004009	Myosin, SH3 domain	Domain
A, B	IPR014751	DNA repair protein XRCC4-like, C-terminal	Homologous Superfamily
A, B	IPR002928	Myosin tail	Domain
A, B	IPR008989	Myosin S1 fragment, N-terminal	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
E, F	Pharos: P10916	hypertrophic cardiomyopathy 10 hypertrophic cardiomyopathy congenital fiber-type disproportion myopathy cardiomyopathy heart disease myopathy cleft lip dilated cardiomyopathy Idiopathic hypertrophic subaortic stenosis familial hypertrophic cardiomyopathy myocardial infarction Charcot-Marie-Tooth disease gout
C, D	Pharos: P08590	hypertrophic cardiomyopathy 8 hypertrophic cardiomyopathy cardiomyopathy amyotrophic lateral sclerosis Charcot-Marie-Tooth disease familial hypertrophic cardiomyopathy breast carcinoma Conduction disorder of the heart limb-girdle muscular dystrophy dilated cardiomyopathy hypertrophic cardiomyopathy 1 myopathy
A, B	Pharos: P12883	myopathy, myosin storage, autosomal dominant dilated cardiomyopathy myopathy, myosin storage, autosomal recessive hypertrophic cardiomyopathy left ventricular noncompaction congenital fiber-type disproportion myopathy dilated cardiomyopathy 1S MYH7-related skeletal myopathy distal myopathy Ebstein anomaly hypertrophic cardiomyopathy 1 cardiomyopathy myocardial infarction tibial muscular dystrophy congenital structural myopathy myopathy, myosin storage, autosomal dominant dilated cardiomyopathy myopathy, myosin storage, autosomal recessive hypertrophic cardiomyopathy left ventricular noncompaction congenital fiber-type disproportion myopathy dilated cardiomyopathy 1S MYH7-related skeletal myopathy distal myopathy Ebstein anomaly hypertrophic cardiomyopathy 1 cardiomyopathy myocardial infarction tibial muscular dystrophy congenital structural myopathy atrial fibrillation MYH7-related late-onset scapuloperoneal muscular dystrophy centronuclear myopathy coronary stenosis familial dilated cardiomyopathy heart disease arthrogryposis LEFT VENTRICULAR NONCOMPACTION 5 autosomal dominant centronuclear myopathy scapuloperoneal myopathy Charcot-Marie-Tooth disease familial hypertrophic cardiomyopathy hyaline body myopathy malignant ependymoma psoriasis X-linked centronuclear myopathy dilated cardiomyopathy 1A familial isolated dilated cardiomyopathy autosomal recessive centronuclear myopathy myopathy myotonia congenita restrictive cardiomyopathy tubular aggregate myopathy X-linked Emery-Dreifuss muscular dystrophy

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
A, B	M3L	Parent Component: LYS RESID: AA0074 PSI-MOD : N6,N6,N6-trimethyl-L-lysine MOD:00083

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.