1QXP

Crystal Structure of a mu-like calpain

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	d1qxpa2	All alpha proteins	EF Hand-like	EF-hand	Penta-EF-hand proteins	Calpain large subunit, C-terminal domain (domain IV)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
A	d1qxpa1	All alpha proteins	EF Hand-like	EF-hand	Penta-EF-hand proteins	Calpain small (regulatory) subunit (domain VI)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
A	d1qxpa3	All beta proteins	Calpain large subunit, middle domain (domain III)	Calpain large subunit, middle domain (domain III)	Calpain large subunit, middle domain (domain III)	Calpain large subunit, middle domain (domain III)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
A	d1qxpa4	Alpha and beta proteins (a+b)	Cysteine proteinases	Cysteine proteinases	Calpain large subunit, catalytic domain (domain II)	Calpain large subunit, catalytic domain (domain II)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
B	d1qxpb2	All alpha proteins	EF Hand-like	EF-hand	Penta-EF-hand proteins	Calpain large subunit, C-terminal domain (domain IV)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
B	d1qxpb1	All alpha proteins	EF Hand-like	EF-hand	Penta-EF-hand proteins	Calpain small (regulatory) subunit (domain VI)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
B	d1qxpb3	All beta proteins	Calpain large subunit, middle domain (domain III)	Calpain large subunit, middle domain (domain III)	Calpain large subunit, middle domain (domain III)	Calpain large subunit, middle domain (domain III)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
B	d1qxpb4	Alpha and beta proteins (a+b)	Cysteine proteinases	Cysteine proteinases	Calpain large subunit, catalytic domain (domain II)	Calpain large subunit, catalytic domain (domain II)	Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], Norway rat (Rattus norvegicus ) [TaxId: 10116 ], cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Calpain large subunit middle domain (domain III)	8027700	4002433	SCOP2 (2022-06-29)
A	SCOP2 Family	Penta-EF-hand proteins	8027699	4003019	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Calpain large subunit middle domain (domain III)	8040079	3001233	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	EF-hand	8040078	3001983	SCOP2 (2022-06-29)
A	SCOP2B Superfamily	Cysteine proteinases	8036715	3001808	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Calpain large subunit middle domain (domain III)	8040079	3001233	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Cysteine proteinases	8036715	3001808	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	Calpain_III	e1qxpA4	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Galactose-binding domain-like	F: Calpain_III	ECOD (1.6)
A	EF-hand_8	e1qxpA5	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_8	ECOD (1.6)
A	EF-hand_7_2	e1qxpA2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_2	ECOD (1.6)
A	Peptidase_C2	e1qxpA1	A: a+b complex topology	X: Cysteine proteinases-like	H: Cysteine proteinases (From Topology)	T: Cysteine proteinases	F: Peptidase_C2	ECOD (1.6)
B	Calpain_III	e1qxpB4	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Galactose-binding domain-like	F: Calpain_III	ECOD (1.6)
B	EF-hand_8	e1qxpB5	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_8	ECOD (1.6)
B	EF-hand_7_2	e1qxpB2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_2	ECOD (1.6)
B	Peptidase_C2	e1qxpB1	A: a+b complex topology	X: Cysteine proteinases-like	H: Cysteine proteinases (From Topology)	T: Cysteine proteinases	F: Peptidase_C2	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.70.10	Alpha Beta	Alpha-Beta Complex	Cathepsin B	Chain A	CATH (4.3.0)
A	2.60.120.380	Mainly Beta	Sandwich	Jelly Rolls		CATH (4.3.0)
A	1.10.238.10	Mainly Alpha	Orthogonal Bundle	Recoverin	domain 1	CATH (4.3.0)
B	3.90.70.10	Alpha Beta	Alpha-Beta Complex	Cathepsin B	Chain A	CATH (4.3.0)
B	2.60.120.380	Mainly Beta	Sandwich	Jelly Rolls		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	PF13833	EF-hand domain pair (EF-hand_8)	EF-hand domain pair	-	Domain
A, B	PF00648	Calpain family cysteine protease (Peptidase_C2)	Calpain family cysteine protease	-	Family
A, B	PF01067	Calpain large subunit, domain III (Calpain_III)	Calpain large subunit, domain III	The function of the domain III and I are currently unknown. Domain II is a cysteine protease and domain IV is a calcium binding domain. Calpains are believed to participate in intracellular signaling pathways mediated by calcium ions.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	mu-like calpain	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity cysteine-type peptidase activity calcium-dependent cysteine-type endopeptidase activity cysteine-type endopeptidase activity endopeptidase activity cation binding ion binding binding calcium ion binding metal ion binding small molecule binding peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity cysteine-type peptidase activity calcium-dependent cysteine-type endopeptidase activity cysteine-type endopeptidase activity endopeptidase activity cytoskeletal protein binding protein binding enzyme binding protein-containing complex binding	organic substance metabolic process organonitrogen compound metabolic process proteolysis self proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process cellular biosynthetic process cellular metabolic process gene expression macromolecule biosynthetic process protein maturation protein autoprocessing organic substance metabolic process organonitrogen compound metabolic process proteolysis self proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process cellular biosynthetic process cellular metabolic process gene expression macromolecule biosynthetic process protein maturation protein autoprocessing biosynthetic process organic substance biosynthetic process protein processing cellular process developmental process multicellular organismal process mammary gland morphogenesis mammary gland development gland development animal organ development anatomical structure morphogenesis gland morphogenesis tissue remodeling anatomical structure development mammary gland involution animal organ morphogenesis organonitrogen compound catabolic process catabolic process protein catabolic process macromolecule catabolic process organic substance catabolic process response to organic substance response to angiotensin response to stimulus response to hormone response to chemical response to endogenous stimulus response to organonitrogen compound response to peptide hormone response to oxygen-containing compound response to nitrogen compound positive regulation of cardiac muscle cell apoptotic process regulation of biological process regulation of cellular process positive regulation of programmed cell death muscle cell apoptotic process positive regulation of striated muscle cell apoptotic process regulation of apoptotic process biological regulation positive regulation of biological process regulation of cardiac muscle cell apoptotic process regulation of muscle cell apoptotic process regulation of programmed cell death cell death positive regulation of apoptotic process cardiac muscle cell apoptotic process positive regulation of muscle cell apoptotic process regulation of striated muscle cell apoptotic process striated muscle cell apoptotic process apoptotic process programmed cell death positive regulation of cellular process regulation of cytoskeleton organization regulation of cellular component organization regulation of actin filament-based process regulation of cellular component size negative regulation of biological process cellular component organization cellular component biogenesis regulation of protein-containing complex assembly cellular component assembly protein-containing complex assembly actin filament-based process negative regulation of cellular process negative regulation of protein polymerization regulation of actin filament polymerization cellular component organization or biogenesis regulation of biological quality negative regulation of supramolecular fiber organization negative regulation of actin filament polymerization protein polymerization actin polymerization or depolymerization regulation of actin filament organization actin filament polymerization actin cytoskeleton organization negative regulation of cellular component organization protein-containing complex organization negative regulation of cytoskeleton organization actin filament organization regulation of actin polymerization or depolymerization regulation of cellular component biogenesis regulation of organelle organization negative regulation of protein-containing complex assembly organelle organization negative regulation of organelle organization regulation of protein polymerization regulation of actin filament length regulation of actin cytoskeleton organization regulation of supramolecular fiber organization supramolecular fiber organization cytoskeleton organization regulation of anatomical structure size cellular response to stimulus cellular response to oxidative stress cellular response to chemical stress cellular response to oxygen-containing compound cellular response to hydrogen peroxide response to reactive oxygen species response to inorganic substance response to hydrogen peroxide response to oxidative stress cellular response to reactive oxygen species cellular response to chemical stimulus cellular response to stress response to stress regulation of molecular function regulation of catalytic activity regulation of cell motility positive regulation of leukocyte cell-cell adhesion regulation of leukocyte adhesion to vascular endothelial cell leukocyte cell-cell adhesion leukocyte tethering or rolling positive regulation of cell-cell adhesion cell adhesion cell-cell adhesion positive regulation of leukocyte tethering or rolling cellular extravasation regulation of cell migration regulation of cell-cell adhesion cell migration regulation of immune system process cell motility locomotion positive regulation of cell adhesion regulation of cell adhesion regulation of leukocyte migration positive regulation of leukocyte adhesion to vascular endothelial cell leukocyte migration regulation of leukocyte tethering or rolling leukocyte adhesion to vascular endothelial cell immune system process regulation of locomotion regulation of leukocyte cell-cell adhesion regulation of cellular extravasation regulation of vascular permeability system process circulatory system process positive regulation of vascular permeability vascular process in circulatory system blood circulation signaling negative regulation of signaling negative regulation of intracellular signal transduction regulation of signal transduction regulation of non-canonical NF-kappaB signal transduction intracellular signal transduction negative regulation of cell communication cell communication regulation of intracellular signal transduction intracellular signaling cassette signal transduction negative regulation of non-canonical NF-kappaB signal transduction regulation of signaling negative regulation of response to stimulus non-canonical NF-kappaB signal transduction negative regulation of signal transduction regulation of response to stimulus regulation of cell communication response to arsenic-containing substance receptor catabolic process cellular catabolic process receptor metabolic process proteolysis involved in protein catabolic process response to interferon-beta response to cytokine cellular response to interferon-beta cellular response to cytokine stimulus cellular response to organic substance behavior multicellular organismal response to stress response to pain behavioral response to pain cellular response to acid chemical cellular response to amino acid stimulus response to acid chemical response to amino acid cellular developmental process myoblast fusion cell-cell fusion muscle cell differentiation myotube differentiation muscle structure development syncytium formation by plasma membrane fusion cell differentiation anatomical structure formation involved in morphogenesis syncytium formation striated muscle cell differentiation response to decreased oxygen levels response to hypoxia response to oxygen levels response to abiotic stimulus positive regulation of cellular component organization regulation of syncytium formation by plasma membrane fusion regulation of developmental process positive regulation of developmental process positive regulation of myoblast fusion regulation of myoblast fusion positive regulation of syncytium formation by plasma membrane fusion interleukin-6 production regulation of interleukin-6 production regulation of cytokine production cytokine production regulation of multicellular organismal process regulation of biosynthetic process regulation of cellular metabolic process regulation of macromolecule metabolic process regulation of cellular biosynthetic process regulation of gene expression regulation of macromolecule biosynthetic process regulation of metabolic process multi-multicellular organism process reproductive process female pregnancy multi-organism reproductive process biological process involved in interspecies interaction between organisms response to lipid response to other organism cellular response to lipopolysaccharide response to external stimulus cellular response to molecule of bacterial origin response to lipopolysaccharide response to biotic stimulus cellular response to biotic stimulus response to bacterium cellular response to lipid response to external biotic stimulus response to molecule of bacterial origin regulation of lipid metabolic process organonitrogen compound biosynthetic process positive regulation of phosphate metabolic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of phosphatidylcholine biosynthetic process regulation of phosphate metabolic process phosphate-containing compound metabolic process positive regulation of lipid metabolic process phosphatidylcholine metabolic process phosphorus metabolic process positive regulation of phosphorus metabolic process phospholipid biosynthetic process regulation of phospholipid biosynthetic process glycerolipid biosynthetic process organophosphate biosynthetic process cellular lipid metabolic process regulation of phosphorus metabolic process glycerolipid metabolic process regulation of phosphatidylcholine biosynthetic process positive regulation of phosphatidylcholine metabolic process glycerophospholipid metabolic process lipid biosynthetic process positive regulation of cellular metabolic process phospholipid metabolic process positive regulation of biosynthetic process glycerophospholipid biosynthetic process regulation of phosphatidylcholine metabolic process positive regulation of phospholipid biosynthetic process regulation of phospholipid metabolic process positive regulation of phospholipid metabolic process positive regulation of lipid biosynthetic process organophosphate metabolic process regulation of lipid biosynthetic process phosphatidylcholine biosynthetic process positive regulation of cellular biosynthetic process lipid metabolic process response to mechanical stimulus multicellular organism development embryo development ending in birth or egg hatching chordate embryonic development embryo development in utero embryonic development blastocyst development	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle cell periphery plasma membrane membrane cornified envelope cytosol lytic vacuole membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle cell periphery plasma membrane membrane cornified envelope cytosol lytic vacuole vacuole lysosome protein-containing complex catalytic complex caspase complex peptidase complex calpain complex endopeptidase complex cell projection pseudopodium plasma membrane bounded cell projection cell surface external side of plasma membrane side of membrane somatodendritic compartment dendrite dendritic tree neuron projection protein-DNA complex intracellular non-membrane-bounded organelle chromatin chromosome non-membrane-bounded organelle endomembrane system perinuclear endoplasmic reticulum perinuclear region of cytoplasm endoplasmic reticulum Golgi apparatus cell body neuronal cell body anchoring junction cell junction focal adhesion cell-substrate junction membrane microdomain membrane raft nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR022684	Peptidase C2, calpain family	Family
A, B	IPR000169	Cysteine peptidase, cysteine active site	Active Site
A, B	IPR038765	Papain-like cysteine peptidase superfamily	Homologous Superfamily
A, B	IPR002048	EF-hand domain	Domain
A, B	IPR011992	EF-hand domain pair	Homologous Superfamily
A, B	IPR001300	Peptidase C2, calpain, catalytic domain	Domain
A, B	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
A, B	IPR022683	Peptidase C2, calpain, domain III	Domain
A, B	IPR033883	Calpain subdomain III	Domain
A, B	IPR036213	Calpain large subunit, domain III superfamily	Homologous Superfamily
A, B	IPR022682	Peptidase C2, calpain, large subunit, domain III	Domain
A, B	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
A, B	IPR002048	EF-hand domain	Domain
A, B	IPR011992	EF-hand domain pair	Homologous Superfamily
A, B	IPR022684	Peptidase C2, calpain family	Family
A, B	IPR038765	Papain-like cysteine peptidase superfamily	Homologous Superfamily
A, B	IPR002048	EF-hand domain	Domain
A, B	IPR042736	CAPN2, penta-EF hand, calcium binding motif	Domain
A, B	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
A, B	IPR033883	Calpain subdomain III	Domain
A, B	IPR036213	Calpain large subunit, domain III superfamily	Homologous Superfamily
A, B	IPR022682	Peptidase C2, calpain, large subunit, domain III	Domain
A, B	IPR000169	Cysteine peptidase, cysteine active site	Active Site
A, B	IPR011992	EF-hand domain pair	Homologous Superfamily
A, B	IPR001300	Peptidase C2, calpain, catalytic domain	Domain
A, B	IPR022683	Peptidase C2, calpain, domain III	Domain