8UZX

The structure of the native cardiac thin filament troponin core in Ca2+-bound fully activated state from the upper strand

External Resource: Annotation

Domain Annotation: SCOP2 Classification
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)
C	SCOP2B Superfamily	EF-hand	8104309	3001983	SCOP2B (2022-06-29)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Actin, alpha cardiac muscle 1	cytoskeletal protein binding protein binding binding myosin binding	actin filament-based process cellular process actin-mediated cell contraction actin filament-based movement actin-myosin filament sliding heart process multicellular organismal process system process circulatory system process heart contraction blood circulation developmental process mesenchyme migration mesenchyme morphogenesis actin filament-based process cellular process actin-mediated cell contraction actin filament-based movement actin-myosin filament sliding heart process multicellular organismal process system process circulatory system process heart contraction blood circulation developmental process mesenchyme migration mesenchyme morphogenesis animal organ development mesenchyme development tissue development tissue morphogenesis anatomical structure morphogenesis tissue migration anatomical structure development animal organ morphogenesis regulation of cellular process cellular biosynthetic process positive regulation of biological process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process organic substance metabolic process positive regulation of biosynthetic process organic substance biosynthetic process positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process positive regulation of gene expression regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular biosynthetic process cellular component organization organelle organization actin cytoskeleton organization actin filament organization cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization	cell projection cell leading edge cellular anatomical entity plasma membrane bounded cell projection lamellipodium intracellular anatomical structure sarcomere intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril cell projection cell leading edge cellular anatomical entity plasma membrane bounded cell projection lamellipodium intracellular anatomical structure sarcomere intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle polymeric cytoskeletal fiber actin filament actin cytoskeleton cytoskeleton cell body actin-based cell projection filopodium
C	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	regulation of muscle adaptation multicellular organismal process striated muscle adaptation system process regulation of biological process response to stimulus transition between fast and slow fiber regulation of skeletal muscle adaptation regulation of system process biological regulation muscle system process regulation of muscle system process muscle adaptation regulation of response to stimulus skeletal muscle adaptation regulation of muscle adaptation multicellular organismal process striated muscle adaptation system process regulation of biological process response to stimulus transition between fast and slow fiber regulation of skeletal muscle adaptation regulation of system process biological regulation muscle system process 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 muscle contraction blood circulation striated muscle contraction multicellular organismal movement musculoskeletal movement nervous system process neuromuscular process skeletal muscle contraction 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	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 cardiac Troponin complex 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 cardiac Troponin complex cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle
D	Troponin I, cardiac muscle	cytoskeletal protein binding actin binding protein binding binding	-	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
E	Troponin T2, cardiac type	-	multicellular organismal process system process regulation of biological process regulation of muscle contraction regulation of system process biological regulation regulation of multicellular organismal process muscle contraction regulation of muscle system process muscle system process	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
F, G	Tropomyosin alpha-1 chain	protein heterodimerization activity protein binding binding protein dimerization activity cytoskeletal protein binding actin binding protein-containing complex binding actin filament binding identical protein binding protein homodimerization activity	cellular component organization organelle organization actin cytoskeleton organization actin filament organization actin filament-based process cellular process cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization heart process multicellular organismal process system process circulatory system process cardiac muscle contraction cellular component organization organelle organization actin cytoskeleton organization actin filament organization actin filament-based process cellular process cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization heart process multicellular organismal process system process circulatory system process cardiac muscle contraction heart contraction muscle contraction muscle system process blood circulation striated muscle contraction	polymeric cytoskeletal fiber intracellular anatomical structure actin filament cellular anatomical entity actin cytoskeleton intracellular organelle cytoskeleton organelle intracellular non-membrane-bounded organelle supramolecular fiber supramolecular polymer supramolecular complex non-membrane-bounded organelle cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR020902	Actin/actin-like conserved site	Conserved Site
A, B	IPR004001	Actin, conserved site	Conserved Site
A, B	IPR043129	ATPase, nucleotide binding domain	Homologous Superfamily
A, B	IPR004000	Actin family	Family
C	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
C	IPR002048	EF-hand domain	Domain
C	IPR011992	EF-hand domain pair	Homologous Superfamily
D	IPR001978	Troponin	Family
D	IPR021666	Troponin I residues 1-32	Family
D	IPR038077	Troponin domain superfamily	Homologous Superfamily
E	IPR027707	Troponin T	Family
E	IPR001978	Troponin	Family
E	IPR038077	Troponin domain superfamily	Homologous Superfamily
F, G	IPR000533	Tropomyosin	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.