Annotations: 3B43

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	I-set	e3b43A5	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
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	Titin	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding structural molecule activity structural constituent of muscle alpha-actinin binding actinin binding muscle alpha-actinin binding protein tyrosine kinase activity catalytic activity, acting on a protein kinase activity cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding structural molecule activity structural constituent of muscle alpha-actinin binding actinin binding muscle alpha-actinin binding protein tyrosine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups 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 enzyme regulator activity molecular function regulator activity protein kinase regulator activity kinase regulator activity calmodulin binding identical protein binding cation binding calcium ion binding metal ion binding enzyme binding protease binding structural molecule activity conferring elasticity protein serine kinase activity protein homodimerization activity protein dimerization activity kinase binding protein kinase binding protein serine/threonine kinase activity telethonin binding	multicellular organismal process system process muscle contraction muscle system process striated muscle contraction response to stimulus response to metal ion response to chemical response to calcium ion regulation of biosynthetic process regulation of biological process regulation of cellular process biological regulation positive regulation of biological process multicellular organismal process system process muscle contraction muscle system process striated muscle contraction response to stimulus response to metal ion response to chemical response to calcium ion regulation of biosynthetic process regulation of biological process regulation of cellular process biological regulation positive regulation of biological process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of macromolecule biosynthetic process regulation of gene expression positive regulation of metabolic process biosynthetic process positive regulation of gene expression positive regulation of biosynthetic process regulation of macromolecule biosynthetic process metabolic process cellular process positive regulation of macromolecule metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular process cellular developmental process cellular component assembly involved in morphogenesis skeletal myofibril assembly cell development membraneless organelle assembly muscle cell differentiation cellular component organization cellular component biogenesis muscle structure development striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly muscle cell development cell differentiation actin filament-based process anatomical structure development cellular component organization or biogenesis developmental process skeletal muscle thin filament assembly actin cytoskeleton organization actomyosin structure organization organelle assembly actin filament organization anatomical structure morphogenesis organelle organization myofibril assembly anatomical structure formation involved in morphogenesis striated muscle cell differentiation supramolecular fiber organization cytoskeleton organization mitotic nuclear division mitotic chromosome condensation organelle fission chromosome organization sister chromatid segregation mitotic cell cycle nuclear division mitotic cell cycle process chromosome condensation mitotic sister chromatid segregation nuclear chromosome segregation cell cycle chromosome segregation cell cycle process detection of external stimulus detection of stimulus detection of mechanical stimulus detection of muscle stretch response to mechanical stimulus response to external stimulus response to abiotic stimulus detection of abiotic stimulus response to muscle stretch myosin filament assembly protein-containing complex assembly skeletal muscle myosin thick filament assembly protein-containing complex organization myosin filament organization striated muscle myosin thick filament assembly heart development cardiac muscle tissue development heart morphogenesis animal organ development tissue development muscle tissue morphogenesis striated muscle tissue development circulatory system development multicellular organism development tissue morphogenesis cardiac muscle tissue morphogenesis animal organ morphogenesis muscle organ development muscle tissue development muscle organ morphogenesis system development sarcomerogenesis multicellular organismal movement musculoskeletal movement nervous system process neuromuscular process skeletal muscle contraction muscle filament sliding actin-mediated cell contraction actin filament-based movement actin-myosin filament sliding regulation of localization establishment of protein localization nitrogen compound transport regulation of protein localization transport positive regulation of establishment of protein localization positive regulation of secretion by cell protein localization to extracellular region positive regulation of protein transport localization regulation of secretion by cell secretion by cell positive regulation of secretion intracellular protein localization regulation of transport secretion regulation of establishment of protein localization establishment of protein localization to extracellular region export from cell regulation of protein transport protein secretion establishment of localization positive regulation of protein secretion regulation of protein secretion regulation of secretion positive regulation of transport protein transport macromolecule localization positive regulation of protein localization muscle hypertrophy cardiac muscle hypertrophy striated muscle hypertrophy cardiac muscle cell development cardiac cell development cardiac muscle cell differentiation cardiocyte differentiation heart process circulatory system process cardiac muscle contraction heart contraction blood circulation cardiac myofibril assembly sarcomere organization	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 Z disc I band extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region extracellular space vesicle extracellular membrane-bounded organelle cytosol protein-containing complex titin-telethonin complex striated muscle thin filament myofilament actin cytoskeleton cytoskeleton condensed nuclear chromosome nucleus membrane-enclosed lumen nuclear chromosome chromosome intracellular membrane-bounded organelle intracellular organelle lumen organelle lumen condensed chromosome nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A	IPR008266	Tyrosine-protein kinase, active site	Active Site
A	IPR000719	Protein kinase domain	Domain
A	IPR013106	Immunoglobulin V-set domain	Domain
A	IPR003599	Immunoglobulin domain subtype	Domain
A	IPR015129	Titin, Z repeat	Repeat
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR007110	Immunoglobulin-like domain	Domain
A	IPR004168	PPAK motif	Repeat
A	IPR003598	Immunoglobulin subtype 2	Domain
A	IPR040849	MyBP-C, tri-helix bundle domain	Domain
A	IPR013098	Immunoglobulin I-set	Domain
A	IPR003961	Fibronectin type III	Domain
A	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
A	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q8WZ42	limb-girdle muscular dystrophy dilated cardiomyopathy myopathy myopathy, myofibrillar, 9, with early respiratory failure tibial muscular dystrophy early-onset myopathy with fatal cardiomyopathy autosomal recessive limb-girdle muscular dystrophy type 2J distal myopathy hypertrophic cardiomyopathy 9 dilated cardiomyopathy 1G atrial fibrillation familial dilated cardiomyopathy hypertrophic cardiomyopathy arrhythmogenic right ventricular cardiomyopathy lung adenocarcinoma limb-girdle muscular dystrophy dilated cardiomyopathy myopathy myopathy, myofibrillar, 9, with early respiratory failure tibial muscular dystrophy early-onset myopathy with fatal cardiomyopathy autosomal recessive limb-girdle muscular dystrophy type 2J distal myopathy hypertrophic cardiomyopathy 9 dilated cardiomyopathy 1G atrial fibrillation familial dilated cardiomyopathy hypertrophic cardiomyopathy arrhythmogenic right ventricular cardiomyopathy lung adenocarcinoma Muscle Weakness cardiomyopathy Emery-Dreifuss muscular dystrophy urinary bladder carcinoma familial isolated dilated cardiomyopathy hereditary spastic paraplegia amyotrophic lateral sclerosis lung carcinoma B-cell chronic lymphocytic leukemia muscle tissue disease muscular dystrophy colorectal adenocarcinoma ovarian mucinous adenocarcinoma squamous cell lung carcinoma gastric adenocarcinoma intellectual disability autosomal recessive centronuclear myopathy lung large cell carcinoma Becker muscular dystrophy centronuclear myopathy dilated cardiomyopathy 1A ovarian serous adenocarcinoma familial hypertrophic cardiomyopathy heart disease kidney Wilms tumor arthrogryposis lung cancer metastatic melanoma muscular disease Charcot-Marie-Tooth disease myopathy, centronuclear, 2 non-small cell lung carcinoma

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.