Annotations: 1ZFS

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1zfsa_	All alpha proteins	EF Hand-like	EF-hand	S100 proteins	Calcyclin (S100)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
B	d1zfsb_	All alpha proteins	EF Hand-like	EF-hand	S100 proteins	Calcyclin (S100)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	S100 proteins	8023193	4000919	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	EF-hand	8035573	3001983	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	EF-hand	8035573	3001983	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	S_100	e1zfsA1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: S_100	ECOD (1.6)
B	S_100	e1zfsB1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: S_100	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)
B	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01023	S-100/ICaBP type calcium binding domain (S_100)	S-100/ICaBP type calcium binding domain	The S-100 domain is a subfamily of the EF-hand calcium binding proteins.	Domain
A, B	PF00036	EF hand (EF-hand_1)	EF hand	The EF-hands can be divided into two classes: signalling proteins and buffering/transport proteins. The first group is the largest and includes the most well-known members of the family such as calmodulin, troponin C and S100B. These proteins typica ...	The EF-hands can be divided into two classes: signalling proteins and buffering/transport proteins. The first group is the largest and includes the most well-known members of the family such as calmodulin, troponin C and S100B. These proteins typically undergo a calcium-dependent conformational change which opens a target binding site. The latter group is represented by calbindin D9k and do not undergo calcium dependent conformational changes.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	S-100 protein, alpha chain	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding protein binding S100 protein binding identical protein binding protein homodimerization activity protein dimerization activity calcium-dependent protein binding ATPase binding enzyme binding	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 regulation of sprouting angiogenesis regulation of developmental process 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 regulation of sprouting angiogenesis regulation of developmental process positive regulation of biological process angiogenesis regulation of vasculature development positive regulation of developmental process multicellular organism development tube morphogenesis anatomical structure development positive regulation of sprouting angiogenesis regulation of anatomical structure morphogenesis blood vessel development system development developmental process regulation of multicellular organismal development blood vessel morphogenesis tube development positive regulation of angiogenesis sprouting angiogenesis vasculature development circulatory system development anatomical structure morphogenesis positive regulation of vasculature development regulation of angiogenesis anatomical structure formation involved in morphogenesis positive regulation of multicellular organismal process regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process transcription by RNA polymerase II negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of transcription by RNA polymerase II negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II negative regulation of metabolic process primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process metabolic process cellular process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle M band intracellular membraneless organelle sarcomere membraneless organelle contractile muscle fiber A band membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle M band intracellular membraneless organelle sarcomere membraneless organelle contractile muscle fiber A band supramolecular fiber myofibril supramolecular polymer supramolecular complex Z disc I band endomembrane system sarcoplasm endoplasmic reticulum sarcoplasmic reticulum nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
A, B	IPR013787	S100/CaBP-9k-type, calcium binding, subdomain	Domain
A, B	IPR001751	S100/Calcium binding protein 7/8-like, conserved site	Conserved Site
A, B	IPR028486	Protein S100-A1	Family
A, B	IPR002048	EF-hand domain	Domain
A, B	IPR011992	EF-hand domain pair	Homologous Superfamily

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.