2K3S

HADDOCK-derived structure of the CH-domain of the smoothelin-like 1 complexed with the C-domain of apocalmodulin

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2k3sa1	All alpha proteins	CH domain-like	Calponin-homology domain, CH-domain	automated matches	automated matches	mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A	d2k3sa2	Artifacts	Tags	Tags	Tags	N-terminal Tags	mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B	d2k3sb1	All alpha proteins	EF Hand-like	EF-hand	Calmodulin-like	Calmodulin	African clawed frog (Xenopus laevis ) [TaxId: 8355 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Calponin-homology domain CH-domain	8084140	3000264	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	CH	e2k3sA1	A: alpha bundles	X: CH domain-like	H: Calponin-homology domain-like (From Topology)	T: Calponin-homology domain-like	F: CH	ECOD (1.6)
B	EF-hand_7_8	e2k3sB1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.418.10	Mainly Alpha	Orthogonal Bundle	Actin-binding Protein, T-fimbrin	domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00307	Calponin homology (CH) domain (CH)	Calponin homology (CH) domain	The CH domain is found in both cytoskeletal proteins and signal transduction proteins [1]. The CH domain is involved in actin binding in some members of the family. However in calponins there is evidence that the CH domain is not involved in its ac ...	The CH domain is found in both cytoskeletal proteins and signal transduction proteins [1]. The CH domain is involved in actin binding in some members of the family. However in calponins there is evidence that the CH domain is not involved in its actin binding activity [4]. Most member proteins have from two to four copies of the CH domain, however some proteins such as calponin and Swiss:P15498 have only a single copy.	Domain
B	PF13499	EF-hand domain pair (EF-hand_7)	EF-hand domain pair	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Smoothelin-like protein 1	myosin phosphatase regulator activity enzyme regulator activity phosphatase regulator activity molecular function regulator activity protein phosphatase regulator activity phosphatase inhibitor activity molecular function inhibitor activity protein phosphatase inhibitor activity enzyme inhibitor activity protein phosphatase binding phosphatase binding protein phosphatase 1 binding protein binding binding myosin phosphatase regulator activity enzyme regulator activity phosphatase regulator activity molecular function regulator activity protein phosphatase regulator activity phosphatase inhibitor activity molecular function inhibitor activity protein phosphatase inhibitor activity enzyme inhibitor activity protein phosphatase binding phosphatase binding protein phosphatase 1 binding protein binding binding enzyme binding CH domain binding protein domain specific binding cytoskeletal protein binding tropomyosin binding calmodulin binding disordered domain specific binding	regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process organic substance biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of DNA-templated transcription regulation of biological process cellular metabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process organic substance biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of DNA-templated transcription regulation of biological process cellular metabolic process negative regulation of metabolic process primary metabolic process regulation of cellular metabolic process negative regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process cellular biosynthetic process RNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process organic substance metabolic process negative regulation of cellular process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process biological regulation regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process negative regulation of biosynthetic process cellular process response to stimulus response to chemical response to xenobiotic stimulus developmental process muscle structure development anatomical structure morphogenesis animal organ development anatomical structure development animal organ morphogenesis muscle organ development muscle organ morphogenesis regulation of tube diameter multicellular organismal process system process regulation of tube size regulation of system process positive regulation of biological process positive regulation of vasoconstriction circulatory system process regulation of blood circulation vascular process in circulatory system regulation of vasoconstriction positive regulation of multicellular organismal process regulation of multicellular organismal process blood vessel diameter maintenance regulation of biological quality vasoconstriction blood circulation regulation of anatomical structure size response to activity cellular component organization organelle organization actin cytoskeleton organization actin filament-based process cellular component organization or biogenesis cytoskeleton organization	M band intracellular anatomical structure cellular anatomical entity sarcomere intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber A band cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex M band intracellular anatomical structure cellular anatomical entity sarcomere intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber A band cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle microtubule organizing center cytoskeleton microtubule cytoskeleton polymeric cytoskeletal fiber protein-containing complex actin filament actin cytoskeleton filamentous actin I band membrane-bounded organelle nucleus intracellular membrane-bounded organelle
B	Calmodulin	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding protein binding signaling receptor binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036872	CH domain superfamily	Homologous Superfamily
A	IPR001715	Calponin homology domain	Domain
B	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
B	IPR002048	EF-hand domain	Domain
B	IPR011992	EF-hand domain pair	Homologous Superfamily

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.