Annotations: 4Y99

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4y99a_	All alpha proteins	EF Hand-like	EF-hand	Calmodulin-like	Troponin C	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d4y99b_	Coiled coil proteins	Parallel coiled-coil	Troponin coil-coiled subunits	Troponin T	Troponin T	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	EF-hand	8033359	3001983	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Troponin coil-coiled subunits	8032250	3001782	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Troponin coil-coiled subunits	8032252	3001782	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	EF-hand_7_1	e4y99A1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_1	ECOD (1.6)
A	EF-hand_7_5	e4y99A2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.20.5.350	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Troponin complex, TnI/TnT subunit	CATH (4.3.0)
C	1.20.5.350	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Troponin complex, TnI/TnT subunit	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF13833	EF-hand domain pair (EF-hand_8)	EF-hand domain pair	-	Domain
A	PF13499	EF-hand domain pair (EF-hand_7)	EF-hand domain pair	-	Domain
B	PF00992	Troponin (Troponin)	Troponin	-	Family
C	PF00992	Troponin (Troponin)	Troponin	-	Family
C	PF11636	Troponin I residues 1-32 (Troponin-I_N)	Troponin I residues 1-32	-	Disordered

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Troponin C, slow skeletal and cardiac muscles	cytoskeletal protein binding protein binding binding troponin T binding cation binding ion binding calcium ion binding metal ion binding small molecule binding actin binding protein-containing complex binding actin filament binding identical protein binding protein homodimerization activity cytoskeletal protein binding protein binding binding troponin T binding cation binding ion binding calcium ion binding metal ion binding small molecule binding actin binding protein-containing complex binding actin filament binding identical protein binding protein homodimerization activity protein dimerization activity calcium-dependent protein binding troponin I binding	multicellular organismal process system process nervous system process neuromuscular process skeletal muscle contraction muscle contraction respiratory gaseous exchange by respiratory system muscle system process striated muscle contraction multicellular organismal movement musculoskeletal movement diaphragm contraction respiratory system process involuntary skeletal muscle contraction multicellular organismal process system process nervous system process neuromuscular process skeletal muscle contraction muscle contraction respiratory gaseous exchange by respiratory system muscle system process striated muscle contraction multicellular organismal movement musculoskeletal movement diaphragm contraction respiratory system process involuntary skeletal muscle contraction regulation of biological process regulation of muscle contraction regulation of system process biological regulation regulation of multicellular organismal process regulation of muscle system process regulation of muscle adaptation striated muscle adaptation response to stimulus transition between fast and slow fiber regulation of skeletal muscle adaptation muscle adaptation regulation of response to stimulus skeletal muscle adaptation heart process circulatory system process cardiac muscle contraction heart contraction blood circulation response to metal ion response to chemical response to inorganic substance regulation of ATP-dependent activity regulation of molecular function ventricular cardiac muscle tissue morphogenesis heart morphogenesis striated muscle tissue development muscle structure development multicellular organism development ventricular cardiac muscle tissue development anatomical structure development cardiac chamber development animal organ morphogenesis muscle tissue development muscle organ development system development developmental process heart development cardiac chamber morphogenesis cardiac muscle tissue development animal organ development 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 regulation of localization cellular localization regulation of cellular process regulation of actin filament-based process transport muscle filament sliding localization establishment of localization in cell actin filament-based process regulation of biological quality regulation of intracellular transport actin-myosin filament sliding regulation of transport regulation of muscle filament sliding speed intracellular transport actin filament-based movement establishment of localization regulation of cellular localization regulation of actin filament-based movement cellular process regulation of muscle filament sliding actin-mediated cell contraction	striated muscle thin filament protein-containing complex intracellular anatomical structure myofilament cellular anatomical entity actin cytoskeleton sarcomere intracellular organelle troponin complex cytoskeleton organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm striated muscle thin filament protein-containing complex intracellular anatomical structure myofilament cellular anatomical entity actin cytoskeleton sarcomere intracellular organelle troponin complex cytoskeleton organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle cytosol cardiac Troponin complex
B	Troponin T, cardiac muscle	cytoskeletal protein binding protein binding binding tropomyosin binding actin binding troponin C binding troponin I binding identical protein 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 heart contraction blood circulation response to stimulus response to metal ion 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 heart contraction blood circulation response to stimulus response to metal ion response to chemical response to calcium ion response to inorganic substance regulation of muscle contraction muscle contraction regulation of muscle system process muscle system process cardiac muscle contraction striated muscle contraction negative regulation of ATP-dependent activity regulation of ATP-dependent activity regulation of molecular function negative regulation of molecular function ventricular cardiac muscle tissue morphogenesis heart morphogenesis striated muscle tissue development muscle structure development multicellular organism development ventricular cardiac muscle tissue development anatomical structure development cardiac chamber development animal organ morphogenesis muscle tissue development muscle organ development system development developmental process heart development cardiac chamber morphogenesis cardiac muscle tissue development animal organ development 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 muscle filament sliding actin filament-based process cellular process actin-mediated cell contraction actin filament-based movement actin-myosin filament sliding positive regulation of molecular function positive regulation of ATP-dependent activity cellular developmental process cellular component assembly involved in morphogenesis non-membrane-bounded organelle assembly cell development muscle cell differentiation cellular component organization cellular component biogenesis striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly muscle cell development cell differentiation sarcomere organization cellular component organization or biogenesis actomyosin structure organization actin cytoskeleton organization organelle assembly myofibril assembly organelle organization anatomical structure formation involved in morphogenesis striated muscle cell differentiation supramolecular fiber organization cytoskeleton organization	intracellular anatomical structure cellular anatomical entity sarcomere intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle striated muscle thin filament intracellular anatomical structure cellular anatomical entity sarcomere intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle striated muscle thin filament protein-containing complex myofilament actin cytoskeleton troponin complex cytoskeleton cytosol cardiac myofibril cardiac Troponin complex
C	Troponin I, cardiac muscle	protein binding binding protein domain specific binding cytoskeletal protein binding actin binding protein-containing complex binding actin filament binding troponin C binding troponin T binding kinase binding enzyme binding protein kinase binding molecular function inhibitor activity channel regulator activity protein binding binding protein domain specific binding cytoskeletal protein binding actin binding protein-containing complex binding actin filament binding troponin C binding troponin T binding kinase binding enzyme binding protein kinase binding molecular function inhibitor activity channel regulator activity transporter inhibitor activity calcium channel inhibitor activity ion channel inhibitor activity ion channel regulator activity molecular function regulator activity calcium channel regulator activity transporter regulator activity channel inhibitor activity calcium-dependent protein binding	developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development negative regulation of ATP-dependent activity regulation of ATP-dependent activity regulation of molecular function biological regulation negative regulation of molecular function multicellular organismal movement developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development negative regulation of ATP-dependent activity regulation of ATP-dependent activity regulation of molecular function biological regulation negative regulation of molecular function multicellular organismal movement musculoskeletal movement system process nervous system process neuromuscular process skeletal muscle contraction muscle contraction muscle system process striated muscle contraction inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis regulation of biological process regulation of system process regulation of muscle system process smooth muscle contraction regulation of smooth muscle contraction regulation of muscle contraction regulation of multicellular organismal process heart process circulatory system process heart contraction blood circulation cellular developmental process blood vessel morphogenesis tube development vasculogenesis vasculature development anatomical structure morphogenesis tube morphogenesis cell differentiation cellular process blood vessel development regulation of systemic arterial blood pressure by ischemic conditions regulation of blood pressure regulation of systemic arterial blood pressure regulation of biological quality nervous system process involved in regulation of systemic arterial blood pressure cardiac muscle contraction 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 tissue morphogenesis cardiac ventricle morphogenesis cardiac muscle tissue morphogenesis cardiac ventricle development muscle organ morphogenesis cellular response to stimulus regulation of cellular process response to stimulus signaling regulation of heart contraction intracellular signal transduction cell communication intracellular signaling cassette signal transduction regulation of cardiac muscle contraction by calcium ion signaling regulation of cardiac muscle contraction regulation of blood circulation regulation of striated muscle contraction calcium-mediated signaling	striated muscle thin filament protein-containing complex intracellular anatomical structure myofilament cellular anatomical entity actin cytoskeleton sarcomere intracellular organelle troponin complex cytoskeleton organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm striated muscle thin filament protein-containing complex intracellular anatomical structure myofilament cellular anatomical entity actin cytoskeleton sarcomere intracellular organelle troponin complex cytoskeleton organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle cytosol cardiac myofibril cardiac Troponin complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
A	IPR002048	EF-hand domain	Domain
A	IPR011992	EF-hand domain pair	Homologous Superfamily
B	IPR001978	Troponin	Family
B	IPR027707	Troponin T	Family
B	IPR038077	Troponin domain superfamily	Homologous Superfamily
C	IPR001978	Troponin	Family
C	IPR038077	Troponin domain superfamily	Homologous Superfamily
C	IPR021666	Troponin I residues 1-32	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P63316	dilated cardiomyopathy 1Z hypertrophic cardiomyopathy 13 dilated cardiomyopathy cardiomyopathy pituitary cancer congestive heart failure endometriosis Hodgkins lymphoma interstitial cystitis lung carcinoma mood disorder psoriasis Charcot-Marie-Tooth disease familial dilated cardiomyopathy hypertrophic cardiomyopathy dilated cardiomyopathy 1Z hypertrophic cardiomyopathy 13 dilated cardiomyopathy cardiomyopathy pituitary cancer congestive heart failure endometriosis Hodgkins lymphoma interstitial cystitis lung carcinoma mood disorder psoriasis Charcot-Marie-Tooth disease familial dilated cardiomyopathy hypertrophic cardiomyopathy lung adenocarcinoma malignant colon neoplasm non-small cell lung carcinoma Conduction disorder of the heart familial isolated dilated cardiomyopathy lung cancer malignant mesothelioma
B	Pharos: P45379	dilated cardiomyopathy cardiomyopathy dilated cardiomyopathy 1D hypertrophic cardiomyopathy 2 cardiomyopathy, familial restrictive, 3 hypertrophic cardiomyopathy left ventricular noncompaction heart disease restrictive cardiomyopathy Ventricular Dysfunction, Left acute coronary syndrome coronary artery disease newborn respiratory distress syndrome ventricular tachycardia glycogen storage disease II dilated cardiomyopathy cardiomyopathy dilated cardiomyopathy 1D hypertrophic cardiomyopathy 2 cardiomyopathy, familial restrictive, 3 hypertrophic cardiomyopathy left ventricular noncompaction heart disease restrictive cardiomyopathy Ventricular Dysfunction, Left acute coronary syndrome coronary artery disease newborn respiratory distress syndrome ventricular tachycardia glycogen storage disease II cardiovascular disease congestive heart failure familial dilated cardiomyopathy Charcot-Marie-Tooth disease chronic obstructive pulmonary disease malignant glioma dilated cardiomyopathy 1DD psoriasis familial hypertrophic cardiomyopathy sudden cardiac arrest glioblastoma heart failure limb-girdle muscular dystrophy malignant mesothelioma Costello syndrome myocardial ischemia dilated cardiomyopathy 1A Duchenne muscular dystrophy familial isolated dilated cardiomyopathy lung cancer
C	Pharos: P19429	dilated cardiomyopathy cardiomyopathy hypertrophic cardiomyopathy 7 cardiomyopathy, familial restrictive, 1 restrictive cardiomyopathy dilated cardiomyopathy 1FF dilated cardiomyopathy 2A hypertrophic cardiomyopathy heart disease acute coronary syndrome myocardial infarction medulloblastoma Obstructive asymmetric septal hypertrophy systemic lupus erythematosus Charcot-Marie-Tooth disease dilated cardiomyopathy cardiomyopathy hypertrophic cardiomyopathy 7 cardiomyopathy, familial restrictive, 1 restrictive cardiomyopathy dilated cardiomyopathy 1FF dilated cardiomyopathy 2A hypertrophic cardiomyopathy heart disease acute coronary syndrome myocardial infarction medulloblastoma Obstructive asymmetric septal hypertrophy systemic lupus erythematosus Charcot-Marie-Tooth disease familial hypertrophic cardiomyopathy hypertensive disorder dilated cardiomyopathy 1A facioscapulohumeral muscular dystrophy familial isolated dilated cardiomyopathy left ventricular noncompaction coronary artery disease familial dilated cardiomyopathy

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.