5K6P | pdb_00005k6p

The NMR structure of the m domain tri-helix bundle and C2 of human cardiac Myosin Binding Protein C

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054771	3000071	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	PK_Tyr_Ser-Thr	e5k6pA1	A: a/b three-layered sandwiches	X: Type II ABC importer transmembrane domain fold	H: DNA mismatch repair protein MutL regulatory subdomain	T: DNA mismatch repair protein MutL regulatory subdomain	F: PK_Tyr_Ser-Thr	ECOD (v294.1)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF18362	Tri-helix bundle domain (THB)	Tri-helix bundle domain	This domain can be found in the myosin-binding motif (m-domain) region present in myosin-binding protein C (MyBP-C). MyBP-C is a sarcomeric assembly protein necessary for the regulation of sarcomere structure and function [1]. The MyBP-C family of pr ...	This domain can be found in the myosin-binding motif (m-domain) region present in myosin-binding protein C (MyBP-C). MyBP-C is a sarcomeric assembly protein necessary for the regulation of sarcomere structure and function [1]. The MyBP-C family of proteins consists mainly of modules with immunoglobulin (Ig) or fibronectin folds [2]. This domain exhibits a three-helix bundle fold and there is a known actin-binding motif, LK(R/K)XK positioned in the third helix (alpha3), similar to that found in villin and related proteins [1].	Domain
A	PF07679	Immunoglobulin I-set domain (I-set)	Immunoglobulin I-set domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Myosin-binding protein C, cardiac-type	cytoskeletal protein binding titin binding protein binding binding structural molecule activity structural constituent of muscle ATPase activator activity molecular function activator activity molecular function regulator activity myosin heavy chain binding myosin binding actin binding cation binding ion binding cytoskeletal protein binding titin binding protein binding binding structural molecule activity structural constituent of muscle ATPase activator activity molecular function activator activity molecular function regulator activity myosin heavy chain binding myosin binding actin binding cation binding ion binding metal ion binding small molecule binding identical protein binding	heart process multicellular organismal process system process regulation of actin filament-based process regulation of cellular process regulation of heart contraction regulation of system process cardiac muscle contraction striated muscle contraction circulatory system process actin filament-based process regulation of multicellular organismal process blood circulation cardiac muscle cell contraction heart process multicellular organismal process system process regulation of actin filament-based process regulation of cellular process regulation of heart contraction regulation of system process cardiac muscle contraction striated muscle contraction circulatory system process actin filament-based process regulation of multicellular organismal process blood circulation cardiac muscle cell contraction regulation of biological process biological regulation regulation of cardiac muscle contraction actin filament-based movement muscle contraction muscle system process regulation of muscle system process regulation of blood circulation regulation of striated muscle contraction regulation of actin filament-based movement regulation of muscle contraction regulation of cardiac muscle cell contraction cellular process actin-mediated cell contraction heart contraction developmental process heart development heart morphogenesis animal organ development circulatory system development multicellular organism development anatomical structure morphogenesis anatomical structure development animal organ morphogenesis system development cell adhesion ventricular cardiac muscle tissue morphogenesis striated muscle tissue development muscle structure development ventricular cardiac muscle tissue development cardiac chamber development 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 developmental process cellular component assembly involved in morphogenesis cell development membraneless organelle assembly 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 regulation of localization cellular localization transport muscle filament sliding localization establishment of localization in cell regulation of intracellular transport actin-myosin filament sliding regulation of transport intracellular transport establishment of localization regulation of cellular localization regulation of muscle filament sliding	M band intracellular anatomical structure intracellular membraneless organelle sarcomere intracellular organelle cellular anatomical structure organelle membraneless organelle contractile muscle fiber A band cytoplasm supramolecular fiber myofibril supramolecular polymer M band intracellular anatomical structure intracellular membraneless organelle sarcomere intracellular organelle cellular anatomical structure organelle membraneless organelle contractile muscle fiber A band cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex myofilament myosin filament striated muscle myosin thick filament C zone cytosol cardiac myofibril

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A	IPR003598	Immunoglobulin subtype 2	Domain
A	IPR050964	Striated Muscle Structural and Regulatory Protein	Family
A	IPR040849	MyBP-C, tri-helix bundle domain	Domain
A	IPR003599	Immunoglobulin domain subtype	Domain
A	IPR013098	Immunoglobulin I-set	Domain
A	IPR003961	Fibronectin type III	Domain
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR007110	Immunoglobulin-like domain	Domain
A	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q14896	hypertrophic cardiomyopathy 4 left ventricular noncompaction 10 cardiomyopathy hypertrophic cardiomyopathy left ventricular noncompaction dilated cardiomyopathy Cardiomegaly hypertensive disorder sudden cardiac arrest endogenous depression familial isolated dilated cardiomyopathy metabolic syndrome X open-angle glaucoma cerebrovascular disorder dilated cardiomyopathy 1A hypertrophic cardiomyopathy 4 left ventricular noncompaction 10 cardiomyopathy hypertrophic cardiomyopathy left ventricular noncompaction dilated cardiomyopathy Cardiomegaly hypertensive disorder sudden cardiac arrest endogenous depression familial isolated dilated cardiomyopathy metabolic syndrome X open-angle glaucoma cerebrovascular disorder dilated cardiomyopathy 1A familial dilated cardiomyopathy heart disease hypertrophic cardiomyopathy 1 prostate carcinoma Charcot-Marie-Tooth disease familial hypertrophic cardiomyopathy

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.