Annotations: 6KLT

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	EF-hand	8093724	3001983	SCOP2B (2021-05-27)
B	SCOP2B Superfamily	Troponin coil-coiled subunits	8094321	3001782	SCOP2B (2021-05-27)

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

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 muscle adaptation striated muscle adaptation regulation of biological process response to stimulus transition between fast and slow fiber regulation of skeletal muscle adaptation regulation of system process biological regulation regulation of muscle system process muscle adaptation regulation of response to stimulus skeletal muscle adaptation regulation of multicellular organismal process heart process circulatory system process cardiac muscle contraction heart contraction blood circulation response to metal ion response to chemical 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 muscle contraction regulation of cellular localization regulation of actin filament-based movement cellular process regulation of muscle filament sliding actin-mediated cell contraction	protein-containing complex intracellular anatomical structure cellular anatomical entity actin cytoskeleton myosin complex intracellular organelle cytoskeleton organelle intracellular non-membrane-bounded organelle myosin II complex non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber protein-containing complex intracellular anatomical structure cellular anatomical entity actin cytoskeleton myosin complex intracellular organelle cytoskeleton organelle intracellular non-membrane-bounded organelle myosin II complex non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber supramolecular polymer supramolecular complex striated muscle thin filament myofilament sarcomere troponin complex cardiac Troponin complex myofibril
B	Troponin T, cardiac muscle	cytoskeletal protein binding troponin C binding protein binding binding troponin I binding protein-macromolecule adaptor activity molecular adaptor activity tropomyosin binding actin binding protein-containing complex binding structural constituent of cytoskeleton structural molecule 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 heart contraction blood circulation developmental process heart development 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 developmental process heart development multicellular organism development anatomical structure development animal organ development circulatory system development system development response to stimulus response to metal ion response to chemical response to calcium ion cardiac atrium morphogenesis heart morphogenesis striated muscle tissue development muscle structure development cardiac chamber development animal organ morphogenesis muscle tissue development muscle organ development cardiac chamber morphogenesis atrial cardiac muscle tissue morphogenesis cardiac muscle tissue development cardiac atrium development tissue development atrial cardiac muscle tissue development muscle tissue morphogenesis anatomical structure morphogenesis tissue morphogenesis cardiac muscle tissue morphogenesis muscle organ morphogenesis negative regulation of ATP-dependent activity regulation of ATP-dependent activity regulation of molecular function negative regulation of molecular function muscle filament sliding actin filament-based process cellular process actin-mediated cell contraction actin filament-based movement muscle contraction muscle system process actin-myosin filament sliding biological process involved in interspecies interaction between organisms response to other organism response to bacterium response to external stimulus response to external biotic stimulus response to biotic stimulus cellular component organization organelle organization actin cytoskeleton organization actin filament organization actin crosslink formation cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization cardiac muscle contraction striated muscle contraction ventricular cardiac muscle tissue morphogenesis ventricular cardiac muscle tissue development cardiac ventricle morphogenesis cardiac ventricle development positive regulation of molecular function positive regulation of ATP-dependent activity regulation of localization cellular localization regulation of cellular process regulation of actin filament-based process transport localization establishment of localization in cell regulation of biological quality regulation of intracellular transport regulation of transport regulation of muscle filament sliding speed intracellular transport regulation of muscle system process establishment of localization regulation of muscle contraction regulation of cellular localization regulation of actin filament-based movement regulation of muscle filament sliding cellular developmental process cellular component assembly involved in morphogenesis non-membrane-bounded organelle assembly cell development muscle cell differentiation cellular component biogenesis striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly muscle cell development cell differentiation sarcomere organization actomyosin structure organization organelle assembly myofibril assembly anatomical structure formation involved in morphogenesis striated muscle cell differentiation	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 sarcoplasm
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 system process muscle contraction muscle system process striated muscle contraction regulation of biological process regulation of muscle contraction developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development system process muscle contraction muscle system process striated 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 multicellular organismal movement musculoskeletal movement nervous system process neuromuscular process skeletal 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 smooth muscle contraction regulation of smooth muscle contraction 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 circulatory system process regulation of biological quality nervous system process involved in regulation of systemic arterial blood pressure blood circulation heart process cardiac muscle contraction heart 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 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	IPR038077	Troponin domain superfamily	Homologous Superfamily
B	IPR027707	Troponin T	Family
C	IPR001978	Troponin	Family
C	IPR038077	Troponin domain superfamily	Homologous Superfamily
C	IPR021666	Troponin I residues 1-32	Family

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.