1SJI

Comparing skeletal and cardiac calsequestrin structures and their calcium binding: a proposed mechanism for coupled calcium binding and protein polymerization

External Resource: Annotation

Domain Annotation: SCOP/SCOPe 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-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1sjia1	Alpha and beta proteins (a/b)	Thioredoxin fold	Thioredoxin-like	automated matches	automated matches	dog (Canis lupus familiaris ) [TaxId: 9615 ],	SCOPe (2.08)
B	d1sjib1	Alpha and beta proteins (a/b)	Thioredoxin fold	Thioredoxin-like	automated matches	automated matches	dog (Canis lupus familiaris ) [TaxId: 9615 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Calsequestrin_1st	e1sjiA3	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: Calsequestrin_1st	ECOD (1.6)
A	Calsequestrin_2nd	e1sjiA2	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: Calsequestrin_2nd	ECOD (1.6)
A	Calsequestrin_3rd	e1sjiA4	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: Calsequestrin_3rd	ECOD (1.6)
B	Calsequestrin_1st	e1sjiB3	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: Calsequestrin_1st	ECOD (1.6)
B	Calsequestrin_2nd	e1sjiB2	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: Calsequestrin_2nd	ECOD (1.6)
B	Calsequestrin_3rd	e1sjiB4	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: Calsequestrin_3rd	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.30.10	Alpha Beta	3-Layer(aba) Sandwich	Glutaredoxin	Glutaredoxin	CATH (4.3.0)
B	3.40.30.10	Alpha Beta	3-Layer(aba) Sandwich	Glutaredoxin	Glutaredoxin	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01216	Calsequestrin (Calsequestrin)	Calsequestrin	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Calsequestrin, cardiac muscle isoform	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding	regulation of calcium ion transmembrane transporter activity regulation of calcium ion transport regulation of localization regulation of cellular process negative regulation of ion transmembrane transporter activity negative regulation of calcium ion transmembrane transporter activity intracellular calcium ion homeostasis negative regulation of biological process negative regulation of ryanodine-sensitive calcium-release channel activity negative regulation of transport calcium ion transport localization negative regulation of cation transmembrane transport monoatomic cation homeostasis regulation of calcium ion transmembrane transporter activity regulation of calcium ion transport regulation of localization regulation of cellular process negative regulation of ion transmembrane transporter activity negative regulation of calcium ion transmembrane transporter activity intracellular calcium ion homeostasis negative regulation of biological process negative regulation of ryanodine-sensitive calcium-release channel activity negative regulation of transport calcium ion transport localization negative regulation of cation transmembrane transport monoatomic cation homeostasis monoatomic cation transport intracellular monoatomic ion homeostasis regulation of biological process regulation of release of sequestered calcium ion into cytosol regulation of monoatomic ion transport inorganic ion transmembrane transport establishment of localization regulation of cation channel activity inorganic cation transmembrane transport maintenance of location transmembrane transport regulation of molecular function release of sequestered calcium ion into cytosol regulation of transmembrane transport chemical homeostasis negative regulation of calcium ion transmembrane transport cellular localization inorganic ion homeostasis transport negative regulation of cation channel activity homeostatic process monoatomic ion transmembrane transport negative regulation of monoatomic ion transport positive regulation of biological process regulation of transmembrane transporter activity calcium ion homeostasis regulation of monoatomic ion transmembrane transport negative regulation of sequestering of calcium ion metal ion transport negative regulation of transmembrane transport regulation of transporter activity maintenance of location in cell regulation of calcium ion transmembrane transport monoatomic cation transmembrane transport positive regulation of sequestering of calcium ion negative regulation of monoatomic ion transmembrane transport negative regulation of release of sequestered calcium ion into cytosol intracellular monoatomic cation homeostasis negative regulation of cellular process monoatomic ion homeostasis monoatomic ion transport intracellular chemical homeostasis regulation of metal ion transport regulation of sequestering of calcium ion positive regulation of cellular process regulation of monoatomic ion transmembrane transporter activity calcium ion transmembrane import into cytosol regulation of transport sequestering of calcium ion biological regulation negative regulation of transporter activity negative regulation of molecular function negative regulation of calcium ion transport cellular homeostasis regulation of ryanodine-sensitive calcium-release channel activity cellular process regulation of monoatomic cation transmembrane transport calcium ion transmembrane transport cellular response to stimulus multicellular organismal process system process response to stimulus regulation of heart contraction regulation of system process sarcoplasmic reticulum calcium ion transport release of sequestered calcium ion into cytosol by sarcoplasmic reticulum cardiac muscle contraction intracellular signal transduction cell communication circulatory system process intracellular signaling cassette signal transduction release of sequestered calcium ion into cytosol by endoplasmic reticulum regulation of cardiac muscle contraction muscle contraction regulation of blood circulation regulation of striated muscle contraction calcium-mediated signaling regulation of muscle contraction heart process signaling regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion striated muscle contraction regulation of multicellular organismal process blood circulation regulation of cardiac muscle contraction by calcium ion signaling muscle system process regulation of muscle system process heart contraction regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum	intracellular anatomical structure cellular anatomical entity Z disc sarcomere intracellular organelle I band organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex intracellular anatomical structure cellular anatomical entity Z disc sarcomere intracellular organelle I band organelle intracellular non-membrane-bounded organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle membrane-bounded organelle intracellular membrane-bounded organelle endomembrane system sarcoplasm endoplasmic reticulum sarcoplasmic reticulum membrane-enclosed lumen sarcoplasmic reticulum lumen intracellular organelle lumen endoplasmic reticulum lumen organelle lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR041858	Calsequestrin, middle TRX-fold domain	Domain
A, B	IPR001393	Calsequestrin	Family
A, B	IPR041860	Calsequestrin, C-terminal TRX-fold domain	Domain
A, B	IPR018233	Calsequestrin, conserved site	Conserved Site
A, B	IPR036249	Thioredoxin-like superfamily	Homologous Superfamily
A, B	IPR041859	Calsequestrin, N-terminal TRX-fold domain	Domain

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.