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CPNS1_HUMAN
ID   CPNS1_HUMAN             Reviewed;         268 AA.
AC   P04632; A8K0P1; Q8WTX3; Q96EW0;
DT   13-AUG-1987, integrated into UniProtKB/Swiss-Prot.
DT   13-AUG-1987, sequence version 1.
DT   03-AUG-2022, entry version 225.
DE   RecName: Full=Calpain small subunit 1;
DE            Short=CSS1;
DE   AltName: Full=Calcium-activated neutral proteinase small subunit;
DE            Short=CANP small subunit;
DE   AltName: Full=Calcium-dependent protease small subunit;
DE            Short=CDPS;
DE   AltName: Full=Calcium-dependent protease small subunit 1;
DE   AltName: Full=Calpain regulatory subunit;
GN   Name=CAPNS1; Synonyms=CAPN4, CAPNS;
OS   Homo sapiens (Human).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae;
OC   Homo.
OX   NCBI_TaxID=9606;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RX   PubMed=3016651;
RA   Ohno S., Emori Y., Suzuki K.;
RT   "Nucleotide sequence of a cDNA coding for the small subunit of human
RT   calcium-dependent protease.";
RL   Nucleic Acids Res. 14:5559-5559(1986).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=3024120; DOI=10.1093/nar/14.22.8805;
RA   Miyake S., Emori Y., Suzuki K.;
RT   "Gene organization of the small subunit of human calcium-activated neutral
RT   protease.";
RL   Nucleic Acids Res. 14:8805-8817(1986).
RN   [3]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RX   PubMed=14702039; DOI=10.1038/ng1285;
RA   Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R.,
RA   Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H.,
RA   Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S.,
RA   Yamamoto J., Saito K., Kawai Y., Isono Y., Nakamura Y., Nagahari K.,
RA   Murakami K., Yasuda T., Iwayanagi T., Wagatsuma M., Shiratori A., Sudo H.,
RA   Hosoiri T., Kaku Y., Kodaira H., Kondo H., Sugawara M., Takahashi M.,
RA   Kanda K., Yokoi T., Furuya T., Kikkawa E., Omura Y., Abe K., Kamihara K.,
RA   Katsuta N., Sato K., Tanikawa M., Yamazaki M., Ninomiya K., Ishibashi T.,
RA   Yamashita H., Murakawa K., Fujimori K., Tanai H., Kimata M., Watanabe M.,
RA   Hiraoka S., Chiba Y., Ishida S., Ono Y., Takiguchi S., Watanabe S.,
RA   Yosida M., Hotuta T., Kusano J., Kanehori K., Takahashi-Fujii A., Hara H.,
RA   Tanase T.-O., Nomura Y., Togiya S., Komai F., Hara R., Takeuchi K.,
RA   Arita M., Imose N., Musashino K., Yuuki H., Oshima A., Sasaki N.,
RA   Aotsuka S., Yoshikawa Y., Matsunawa H., Ichihara T., Shiohata N., Sano S.,
RA   Moriya S., Momiyama H., Satoh N., Takami S., Terashima Y., Suzuki O.,
RA   Nakagawa S., Senoh A., Mizoguchi H., Goto Y., Shimizu F., Wakebe H.,
RA   Hishigaki H., Watanabe T., Sugiyama A., Takemoto M., Kawakami B.,
RA   Yamazaki M., Watanabe K., Kumagai A., Itakura S., Fukuzumi Y., Fujimori Y.,
RA   Komiyama M., Tashiro H., Tanigami A., Fujiwara T., Ono T., Yamada K.,
RA   Fujii Y., Ozaki K., Hirao M., Ohmori Y., Kawabata A., Hikiji T.,
RA   Kobatake N., Inagaki H., Ikema Y., Okamoto S., Okitani R., Kawakami T.,
RA   Noguchi S., Itoh T., Shigeta K., Senba T., Matsumura K., Nakajima Y.,
RA   Mizuno T., Morinaga M., Sasaki M., Togashi T., Oyama M., Hata H.,
RA   Watanabe M., Komatsu T., Mizushima-Sugano J., Satoh T., Shirai Y.,
RA   Takahashi Y., Nakagawa K., Okumura K., Nagase T., Nomura N., Kikuchi H.,
RA   Masuho Y., Yamashita R., Nakai K., Yada T., Nakamura Y., Ohara O.,
RA   Isogai T., Sugano S.;
RT   "Complete sequencing and characterization of 21,243 full-length human
RT   cDNAs.";
RL   Nat. Genet. 36:40-45(2004).
RN   [4]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RA   Kalnine N., Chen X., Rolfs A., Halleck A., Hines L., Eisenstein S.,
RA   Koundinya M., Raphael J., Moreira D., Kelley T., LaBaer J., Lin Y.,
RA   Phelan M., Farmer A.;
RT   "Cloning of human full-length CDSs in BD Creator(TM) system donor vector.";
RL   Submitted (AUG-2003) to the EMBL/GenBank/DDBJ databases.
RN   [5]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND VARIANT VAL-224.
RG   NIEHS SNPs program;
RL   Submitted (OCT-2004) to the EMBL/GenBank/DDBJ databases.
RN   [6]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=15057824; DOI=10.1038/nature02399;
RA   Grimwood J., Gordon L.A., Olsen A.S., Terry A., Schmutz J., Lamerdin J.E.,
RA   Hellsten U., Goodstein D., Couronne O., Tran-Gyamfi M., Aerts A.,
RA   Altherr M., Ashworth L., Bajorek E., Black S., Branscomb E., Caenepeel S.,
RA   Carrano A.V., Caoile C., Chan Y.M., Christensen M., Cleland C.A.,
RA   Copeland A., Dalin E., Dehal P., Denys M., Detter J.C., Escobar J.,
RA   Flowers D., Fotopulos D., Garcia C., Georgescu A.M., Glavina T., Gomez M.,
RA   Gonzales E., Groza M., Hammon N., Hawkins T., Haydu L., Ho I., Huang W.,
RA   Israni S., Jett J., Kadner K., Kimball H., Kobayashi A., Larionov V.,
RA   Leem S.-H., Lopez F., Lou Y., Lowry S., Malfatti S., Martinez D.,
RA   McCready P.M., Medina C., Morgan J., Nelson K., Nolan M., Ovcharenko I.,
RA   Pitluck S., Pollard M., Popkie A.P., Predki P., Quan G., Ramirez L.,
RA   Rash S., Retterer J., Rodriguez A., Rogers S., Salamov A., Salazar A.,
RA   She X., Smith D., Slezak T., Solovyev V., Thayer N., Tice H., Tsai M.,
RA   Ustaszewska A., Vo N., Wagner M., Wheeler J., Wu K., Xie G., Yang J.,
RA   Dubchak I., Furey T.S., DeJong P., Dickson M., Gordon D., Eichler E.E.,
RA   Pennacchio L.A., Richardson P., Stubbs L., Rokhsar D.S., Myers R.M.,
RA   Rubin E.M., Lucas S.M.;
RT   "The DNA sequence and biology of human chromosome 19.";
RL   Nature 428:529-535(2004).
RN   [7]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC   TISSUE=Lung, Muscle, Pancreas, Skin, and Uterus;
RX   PubMed=15489334; DOI=10.1101/gr.2596504;
RG   The MGC Project Team;
RT   "The status, quality, and expansion of the NIH full-length cDNA project:
RT   the Mammalian Gene Collection (MGC).";
RL   Genome Res. 14:2121-2127(2004).
RN   [8]
RP   PROTEIN SEQUENCE OF 1-9; 61-84 AND 159-165, ACETYLATION AT MET-1, AND
RP   IDENTIFICATION BY MASS SPECTROMETRY.
RC   TISSUE=B-cell lymphoma;
RA   Bienvenut W.V.;
RL   Submitted (OCT-2004) to UniProtKB.
RN   [9]
RP   ACETYLATION [LARGE SCALE ANALYSIS] AT MET-1, AND IDENTIFICATION BY MASS
RP   SPECTROMETRY [LARGE SCALE ANALYSIS].
RX   PubMed=19413330; DOI=10.1021/ac9004309;
RA   Gauci S., Helbig A.O., Slijper M., Krijgsveld J., Heck A.J., Mohammed S.;
RT   "Lys-N and trypsin cover complementary parts of the phosphoproteome in a
RT   refined SCX-based approach.";
RL   Anal. Chem. 81:4493-4501(2009).
RN   [10]
RP   ACETYLATION [LARGE SCALE ANALYSIS] AT LYS-179, AND IDENTIFICATION BY MASS
RP   SPECTROMETRY [LARGE SCALE ANALYSIS].
RX   PubMed=19608861; DOI=10.1126/science.1175371;
RA   Choudhary C., Kumar C., Gnad F., Nielsen M.L., Rehman M., Walther T.C.,
RA   Olsen J.V., Mann M.;
RT   "Lysine acetylation targets protein complexes and co-regulates major
RT   cellular functions.";
RL   Science 325:834-840(2009).
RN   [11]
RP   IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS].
RX   PubMed=21269460; DOI=10.1186/1752-0509-5-17;
RA   Burkard T.R., Planyavsky M., Kaupe I., Breitwieser F.P., Buerckstuemmer T.,
RA   Bennett K.L., Superti-Furga G., Colinge J.;
RT   "Initial characterization of the human central proteome.";
RL   BMC Syst. Biol. 5:17-17(2011).
RN   [12]
RP   ACETYLATION [LARGE SCALE ANALYSIS] AT MET-1, AND IDENTIFICATION BY MASS
RP   SPECTROMETRY [LARGE SCALE ANALYSIS].
RX   PubMed=22223895; DOI=10.1074/mcp.m111.015131;
RA   Bienvenut W.V., Sumpton D., Martinez A., Lilla S., Espagne C., Meinnel T.,
RA   Giglione C.;
RT   "Comparative large-scale characterisation of plant vs. mammal proteins
RT   reveals similar and idiosyncratic N-alpha acetylation features.";
RL   Mol. Cell. Proteomics 11:M111.015131-M111.015131(2012).
RN   [13]
RP   PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-6, AND IDENTIFICATION BY MASS
RP   SPECTROMETRY [LARGE SCALE ANALYSIS].
RC   TISSUE=Erythroleukemia;
RX   PubMed=23186163; DOI=10.1021/pr300630k;
RA   Zhou H., Di Palma S., Preisinger C., Peng M., Polat A.N., Heck A.J.,
RA   Mohammed S.;
RT   "Toward a comprehensive characterization of a human cancer cell
RT   phosphoproteome.";
RL   J. Proteome Res. 12:260-271(2013).
RN   [14]
RP   IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS].
RC   TISSUE=Liver;
RX   PubMed=24275569; DOI=10.1016/j.jprot.2013.11.014;
RA   Bian Y., Song C., Cheng K., Dong M., Wang F., Huang J., Sun D., Wang L.,
RA   Ye M., Zou H.;
RT   "An enzyme assisted RP-RPLC approach for in-depth analysis of human liver
RT   phosphoproteome.";
RL   J. Proteomics 96:253-262(2014).
RN   [15]
RP   ACETYLATION [LARGE SCALE ANALYSIS] AT MET-1, AND IDENTIFICATION BY MASS
RP   SPECTROMETRY [LARGE SCALE ANALYSIS].
RX   PubMed=25944712; DOI=10.1002/pmic.201400617;
RA   Vaca Jacome A.S., Rabilloud T., Schaeffer-Reiss C., Rompais M., Ayoub D.,
RA   Lane L., Bairoch A., Van Dorsselaer A., Carapito C.;
RT   "N-terminome analysis of the human mitochondrial proteome.";
RL   Proteomics 15:2519-2524(2015).
RN   [16]
RP   X-RAY CRYSTALLOGRAPHY (2.7 ANGSTROMS).
RX   PubMed=10639123; DOI=10.1073/pnas.97.2.588;
RA   Strobl S., Fernandez-Catalan C., Braun M., Huber R., Masumoto H.,
RA   Nakagawa K., Irie A., Sorimachi H., Bourenkow G., Bartunik H., Suzuki K.,
RA   Bode W.;
RT   "The crystal structure of calcium-free human m-calpain suggests an
RT   electrostatic switch mechanism for activation by calcium.";
RL   Proc. Natl. Acad. Sci. U.S.A. 97:588-592(2000).
CC   -!- FUNCTION: Regulatory subunit of the calcium-regulated non-lysosomal
CC       thiol-protease which catalyzes limited proteolysis of substrates
CC       involved in cytoskeletal remodeling and signal transduction. Essential
CC       for embryonic development (By similarity).
CC       {ECO:0000250|UniProtKB:O88456}.
CC   -!- SUBUNIT: Homodimer or heterodimer of a large (catalytic) and a small
CC       (regulatory) subunit. In presence of calcium, the heterodimer
CC       dissociates (By similarity). {ECO:0000250}.
CC   -!- INTERACTION:
CC       P04632; Q6RW13: AGTRAP; NbExp=3; IntAct=EBI-711828, EBI-741181;
CC       P04632; P17655: CAPN2; NbExp=5; IntAct=EBI-711828, EBI-1028956;
CC       P04632; Q96NL8: CFAP418; NbExp=2; IntAct=EBI-711828, EBI-11904873;
CC       P04632; P20936: RASA1; NbExp=3; IntAct=EBI-711828, EBI-1026476;
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}. Cell membrane
CC       {ECO:0000250}. Note=Translocates to the plasma membrane upon calcium
CC       binding. {ECO:0000250}.
CC   -!- DOMAIN: The contact of the 5th EF-hand domain from each monomer allows
CC       the formation of the homodimer and also appears to mediate the contact
CC       between the large catalytic subunit and small regulatory subunit for
CC       the formation of the heterodimer. {ECO:0000250}.
CC   -!- DOMAIN: EF-hand domains are paired. EF-hand 1 is paired with EF-hand 2
CC       and EF-hand 3 is paired with EF-hand 4. The fifth EF-hand domain, left
CC       unpaired, does not bind the calcium but is responsible of the
CC       dimerization by EF-embrace. The first four EF-hand domains bind
CC       calcium, however it is not sure if the binding of EF-hand 4 to calcium
CC       is physiologically relevant.
CC   -!- WEB RESOURCE: Name=CaBP; Note=Calpain;
CC       URL="http://structbio.vanderbilt.edu/cabp_database/general/prot_pages/calpain.html";
CC   -!- WEB RESOURCE: Name=Calpains homepage;
CC       URL="https://cals.arizona.edu/calpains/";
CC   -!- WEB RESOURCE: Name=NIEHS-SNPs;
CC       URL="http://egp.gs.washington.edu/data/capns1/";
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DR   EMBL; X04106; CAA27726.1; -; mRNA.
DR   EMBL; M31511; AAA35646.1; -; Genomic_DNA.
DR   EMBL; M31502; AAA35646.1; JOINED; Genomic_DNA.
DR   EMBL; M31503; AAA35646.1; JOINED; Genomic_DNA.
DR   EMBL; M31504; AAA35646.1; JOINED; Genomic_DNA.
DR   EMBL; M31505; AAA35646.1; JOINED; Genomic_DNA.
DR   EMBL; M31506; AAA35646.1; JOINED; Genomic_DNA.
DR   EMBL; M31507; AAA35646.1; JOINED; Genomic_DNA.
DR   EMBL; M31508; AAA35646.1; JOINED; Genomic_DNA.
DR   EMBL; M31509; AAA35646.1; JOINED; Genomic_DNA.
DR   EMBL; M31510; AAA35646.1; JOINED; Genomic_DNA.
DR   EMBL; AK289606; BAF82295.1; -; mRNA.
DR   EMBL; BT009775; AAP88777.1; -; mRNA.
DR   EMBL; AY789642; AAV40829.1; -; Genomic_DNA.
DR   EMBL; AD001527; AAB51183.1; -; Genomic_DNA.
DR   EMBL; AC002984; AAB81546.1; -; Genomic_DNA.
DR   EMBL; BC000592; AAH00592.1; -; mRNA.
DR   EMBL; BC007779; AAH07779.1; -; mRNA.
DR   EMBL; BC011903; AAH11903.1; -; mRNA.
DR   EMBL; BC017308; AAH17308.1; -; mRNA.
DR   EMBL; BC018931; AAH18931.1; -; mRNA.
DR   EMBL; BC021933; AAH21933.1; -; mRNA.
DR   EMBL; BC023643; AAH23643.1; -; mRNA.
DR   EMBL; BC064998; AAH64998.1; -; mRNA.
DR   CCDS; CCDS12489.1; -.
DR   PIR; A26107; CIHUL.
DR   RefSeq; NP_001003962.1; NM_001003962.2.
DR   RefSeq; NP_001289561.1; NM_001302632.1.
DR   RefSeq; NP_001289562.1; NM_001302633.1.
DR   RefSeq; NP_001740.1; NM_001749.3.
DR   RefSeq; XP_005259352.1; XM_005259295.1.
DR   RefSeq; XP_005259353.1; XM_005259296.1.
DR   PDB; 1KFU; X-ray; 2.50 A; S=85-268.
DR   PDB; 1KFX; X-ray; 3.15 A; S=85-268.
DR   PDB; 4PHJ; X-ray; 1.60 A; A/B=96-268.
DR   PDB; 4PHK; X-ray; 2.05 A; A/B=96-268.
DR   PDB; 4PHM; X-ray; 2.03 A; A/B=96-268.
DR   PDB; 4WQ2; X-ray; 1.64 A; A/B=96-268.
DR   PDB; 4WQ3; X-ray; 1.79 A; A/B=96-268.
DR   PDB; 5D69; X-ray; 1.97 A; A/B=96-268.
DR   PDB; 6QLB; X-ray; 2.32 A; A/B/C/D=96-268.
DR   PDBsum; 1KFU; -.
DR   PDBsum; 1KFX; -.
DR   PDBsum; 4PHJ; -.
DR   PDBsum; 4PHK; -.
DR   PDBsum; 4PHM; -.
DR   PDBsum; 4WQ2; -.
DR   PDBsum; 4WQ3; -.
DR   PDBsum; 5D69; -.
DR   PDBsum; 6QLB; -.
DR   AlphaFoldDB; P04632; -.
DR   SMR; P04632; -.
DR   BioGRID; 107276; 91.
DR   ComplexPortal; CPX-2674; M-Calpain complex.
DR   ComplexPortal; CPX-4302; mu-Calpain complex.
DR   CORUM; P04632; -.
DR   IntAct; P04632; 45.
DR   MINT; P04632; -.
DR   STRING; 9606.ENSP00000246533; -.
DR   BindingDB; P04632; -.
DR   ChEMBL; CHEMBL2111357; -.
DR   DrugBank; DB02570; PD150606.
DR   GlyGen; P04632; 2 sites, 1 O-linked glycan (2 sites).
DR   iPTMnet; P04632; -.
DR   MetOSite; P04632; -.
DR   PhosphoSitePlus; P04632; -.
DR   SwissPalm; P04632; -.
DR   BioMuta; CAPNS1; -.
DR   DMDM; 115612; -.
DR   OGP; P04632; -.
DR   REPRODUCTION-2DPAGE; IPI00025084; -.
DR   SWISS-2DPAGE; P04632; -.
DR   CPTAC; CPTAC-470; -.
DR   CPTAC; CPTAC-471; -.
DR   EPD; P04632; -.
DR   jPOST; P04632; -.
DR   MassIVE; P04632; -.
DR   MaxQB; P04632; -.
DR   PaxDb; P04632; -.
DR   PeptideAtlas; P04632; -.
DR   PRIDE; P04632; -.
DR   ProteomicsDB; 51727; -.
DR   TopDownProteomics; P04632; -.
DR   Antibodypedia; 1704; 260 antibodies from 33 providers.
DR   DNASU; 826; -.
DR   Ensembl; ENST00000246533.8; ENSP00000246533.2; ENSG00000126247.11.
DR   Ensembl; ENST00000588815.5; ENSP00000464849.1; ENSG00000126247.11.
DR   GeneID; 826; -.
DR   KEGG; hsa:826; -.
DR   MANE-Select; ENST00000246533.8; ENSP00000246533.2; NM_001749.4; NP_001740.1.
DR   UCSC; uc002odi.2; human.
DR   CTD; 826; -.
DR   DisGeNET; 826; -.
DR   GeneCards; CAPNS1; -.
DR   HGNC; HGNC:1481; CAPNS1.
DR   HPA; ENSG00000126247; Low tissue specificity.
DR   MIM; 114170; gene.
DR   neXtProt; NX_P04632; -.
DR   OpenTargets; ENSG00000126247; -.
DR   PharmGKB; PA26067; -.
DR   VEuPathDB; HostDB:ENSG00000126247; -.
DR   eggNOG; KOG0037; Eukaryota.
DR   GeneTree; ENSGT00940000155478; -.
DR   InParanoid; P04632; -.
DR   OMA; MCRAFQT; -.
DR   OrthoDB; 1330600at2759; -.
DR   PhylomeDB; P04632; -.
DR   TreeFam; TF314682; -.
DR   BRENDA; 3.4.22.53; 2681.
DR   BRENDA; 3.4.22.B24; 2681.
DR   PathwayCommons; P04632; -.
DR   Reactome; R-HSA-1474228; Degradation of the extracellular matrix.
DR   Reactome; R-HSA-6809371; Formation of the cornified envelope.
DR   Reactome; R-HSA-8862803; Deregulated CDK5 triggers multiple neurodegenerative pathways in Alzheimer's disease models.
DR   SignaLink; P04632; -.
DR   BioGRID-ORCS; 826; 16 hits in 1074 CRISPR screens.
DR   ChiTaRS; CAPNS1; human.
DR   EvolutionaryTrace; P04632; -.
DR   GeneWiki; CAPNS1; -.
DR   GenomeRNAi; 826; -.
DR   Pharos; P04632; Tbio.
DR   PRO; PR:P04632; -.
DR   Proteomes; UP000005640; Chromosome 19.
DR   RNAct; P04632; protein.
DR   Bgee; ENSG00000126247; Expressed in metanephros cortex and 204 other tissues.
DR   ExpressionAtlas; P04632; baseline and differential.
DR   Genevisible; P04632; HS.
DR   GO; GO:0110158; C:calpain complex; IPI:ComplexPortal.
DR   GO; GO:0005829; C:cytosol; IDA:BHF-UCL.
DR   GO; GO:0070062; C:extracellular exosome; HDA:UniProtKB.
DR   GO; GO:0016020; C:membrane; IDA:BHF-UCL.
DR   GO; GO:0005886; C:plasma membrane; TAS:Reactome.
DR   GO; GO:0005509; F:calcium ion binding; IEA:InterPro.
DR   GO; GO:0004198; F:calcium-dependent cysteine-type endopeptidase activity; IDA:MGI.
DR   GO; GO:0008284; P:positive regulation of cell population proliferation; TAS:ProtInc.
DR   GO; GO:0006508; P:proteolysis; IC:ComplexPortal.
DR   GO; GO:0016241; P:regulation of macroautophagy; NAS:ParkinsonsUK-UCL.
DR   InterPro; IPR029642; CAPN4.
DR   InterPro; IPR011992; EF-hand-dom_pair.
DR   InterPro; IPR018247; EF_Hand_1_Ca_BS.
DR   InterPro; IPR002048; EF_hand_dom.
DR   PANTHER; PTHR46735:SF1; PTHR46735:SF1; 1.
DR   SUPFAM; SSF47473; SSF47473; 1.
DR   PROSITE; PS00018; EF_HAND_1; 2.
DR   PROSITE; PS50222; EF_HAND_2; 3.
PE   1: Evidence at protein level;
KW   3D-structure; Acetylation; Calcium; Cell membrane; Cytoplasm;
KW   Direct protein sequencing; Membrane; Metal-binding; Phosphoprotein;
KW   Reference proteome; Repeat.
FT   CHAIN           1..268
FT                   /note="Calpain small subunit 1"
FT                   /id="PRO_0000073713"
FT   DOMAIN          91..125
FT                   /note="EF-hand 1; atypical"
FT                   /evidence="ECO:0000305"
FT   DOMAIN          139..172
FT                   /note="EF-hand 2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00448"
FT   DOMAIN          169..204
FT                   /note="EF-hand 3"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00448"
FT   DOMAIN          205..233
FT                   /note="EF-hand 4"
FT                   /evidence="ECO:0000305"
FT   DOMAIN          234..268
FT                   /note="EF-hand 5"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         109
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:Q64537"
FT   BINDING         112
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:Q64537"
FT   BINDING         114
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:Q64537"
FT   BINDING         119
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:Q64537"
FT   BINDING         137
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="4"
FT                   /evidence="ECO:0000250|UniProtKB:Q64537"
FT   BINDING         152
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         154
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         156
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250|UniProtKB:Q64537,
FT                   ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         158
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250|UniProtKB:Q64537,
FT                   ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         163
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         182
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="3"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         184
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="3"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         186
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="3"
FT                   /evidence="ECO:0000250|UniProtKB:Q64537,
FT                   ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         188
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="3"
FT                   /evidence="ECO:0000250|UniProtKB:Q64537,
FT                   ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         193
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="3"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00448"
FT   BINDING         225
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /ligand_label="4"
FT                   /evidence="ECO:0000250|UniProtKB:Q64537"
FT   MOD_RES         1
FT                   /note="N-acetylmethionine"
FT                   /evidence="ECO:0000269|Ref.8, ECO:0007744|PubMed:19413330,
FT                   ECO:0007744|PubMed:22223895, ECO:0007744|PubMed:25944712"
FT   MOD_RES         6
FT                   /note="Phosphoserine"
FT                   /evidence="ECO:0007744|PubMed:23186163"
FT   MOD_RES         179
FT                   /note="N6-acetyllysine"
FT                   /evidence="ECO:0007744|PubMed:19608861"
FT   VARIANT         224
FT                   /note="M -> V (in dbSNP:rs17878750)"
FT                   /evidence="ECO:0000269|Ref.5"
FT                   /id="VAR_021089"
FT   CONFLICT        5
FT                   /note="N -> D (in Ref. 7; AAH64998)"
FT                   /evidence="ECO:0000305"
FT   CONFLICT        27
FT                   /note="N -> G (in Ref. 7; AAH64998)"
FT                   /evidence="ECO:0000305"
FT   CONFLICT        34
FT                   /note="S -> G (in Ref. 7; AAH64998)"
FT                   /evidence="ECO:0000305"
FT   CONFLICT        261..268
FT                   /note="WLQLTMYS -> VRTPILGYGCLGGPHPSALHTSSELQSPSSYFASRPWVRA
FT                   KGLVLLGFPVLTLHPPLPSGCS (in Ref. 7; AAH11903)"
FT                   /evidence="ECO:0000305"
FT   CONFLICT        267
FT                   /note="Y -> F (in Ref. 7; AAH21933)"
FT                   /evidence="ECO:0000305"
FT   HELIX           97..109
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   HELIX           110..112
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   HELIX           117..130
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   HELIX           141..151
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   STRAND          156..159
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   HELIX           161..181
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   STRAND          187..190
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   TURN            191..193
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   HELIX           194..200
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   HELIX           207..217
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   STRAND          222..224
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   HELIX           226..246
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   TURN            247..249
FT                   /evidence="ECO:0007829|PDB:4PHK"
FT   STRAND          252..256
FT                   /evidence="ECO:0007829|PDB:4PHJ"
FT   HELIX           258..265
FT                   /evidence="ECO:0007829|PDB:4PHJ"
SQ   SEQUENCE   268 AA;  28316 MW;  17B87A8E47A90632 CRC64;
     MFLVNSFLKG GGGGGGGGGG LGGGLGNVLG GLISGAGGGG GGGGGGGGGG GGGGGGTAMR
     ILGGVISAIS EAAAQYNPEP PPPRTHYSNI EANESEEVRQ FRRLFAQLAG DDMEVSATEL
     MNILNKVVTR HPDLKTDGFG IDTCRSMVAV MDSDTTGKLG FEEFKYLWNN IKRWQAIYKQ
     FDTDRSGTIC SSELPGAFEA AGFHLNEHLY NMIIRRYSDE SGNMDFDNFI SCLVRLDAMF
     RAFKSLDKDG TGQIQVNIQE WLQLTMYS
 
 
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