ID MYLK3_HUMAN Reviewed; 819 AA. AC Q32MK0; B5BUL9; B7Z5U8; Q32MK1; Q96DV1; DT 23-JAN-2007, integrated into UniProtKB/Swiss-Prot. DT 28-JUL-2009, sequence version 3. DT 24-JAN-2024, entry version 136. DE RecName: Full=Myosin light chain kinase 3; DE EC=2.7.11.18; DE AltName: Full=Cardiac-MyBP-C-associated Ca/CaM kinase; DE Short=Cardiac-MLCK; GN Name=MYLK3; Synonyms=MLCK; 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] (ISOFORM 1), AND VARIANT LEU-180. RC TISSUE=Cardiac myocyte; RA Mues A., Seidel R., Gautel M.; RT "The cardiac-MyBP-C associated Ca/CaM kinase is a novel MLCK with cardiac- RT specific domains."; RL Submitted (JUN-2001) to the EMBL/GenBank/DDBJ databases. RN [2] RP NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 2). RC TISSUE=Tongue; 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 [3] RP NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1). RX PubMed=19054851; DOI=10.1038/nmeth.1273; RA Goshima N., Kawamura Y., Fukumoto A., Miura A., Honma R., Satoh R., RA Wakamatsu A., Yamamoto J., Kimura K., Nishikawa T., Andoh T., Iida Y., RA Ishikawa K., Ito E., Kagawa N., Kaminaga C., Kanehori K., Kawakami B., RA Kenmochi K., Kimura R., Kobayashi M., Kuroita T., Kuwayama H., Maruyama Y., RA Matsuo K., Minami K., Mitsubori M., Mori M., Morishita R., Murase A., RA Nishikawa A., Nishikawa S., Okamoto T., Sakagami N., Sakamoto Y., RA Sasaki Y., Seki T., Sono S., Sugiyama A., Sumiya T., Takayama T., RA Takayama Y., Takeda H., Togashi T., Yahata K., Yamada H., Yanagisawa Y., RA Endo Y., Imamoto F., Kisu Y., Tanaka S., Isogai T., Imai J., Watanabe S., RA Nomura N.; RT "Human protein factory for converting the transcriptome into an in vitro- RT expressed proteome."; RL Nat. Methods 5:1011-1017(2008). RN [4] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RX PubMed=15616553; DOI=10.1038/nature03187; RA Martin J., Han C., Gordon L.A., Terry A., Prabhakar S., She X., Xie G., RA Hellsten U., Chan Y.M., Altherr M., Couronne O., Aerts A., Bajorek E., RA Black S., Blumer H., Branscomb E., Brown N.C., Bruno W.J., Buckingham J.M., RA Callen D.F., Campbell C.S., Campbell M.L., Campbell E.W., Caoile C., RA Challacombe J.F., Chasteen L.A., Chertkov O., Chi H.C., Christensen M., RA Clark L.M., Cohn J.D., Denys M., Detter J.C., Dickson M., RA Dimitrijevic-Bussod M., Escobar J., Fawcett J.J., Flowers D., Fotopulos D., RA Glavina T., Gomez M., Gonzales E., Goodstein D., Goodwin L.A., Grady D.L., RA Grigoriev I., Groza M., Hammon N., Hawkins T., Haydu L., Hildebrand C.E., RA Huang W., Israni S., Jett J., Jewett P.B., Kadner K., Kimball H., RA Kobayashi A., Krawczyk M.-C., Leyba T., Longmire J.L., Lopez F., Lou Y., RA Lowry S., Ludeman T., Manohar C.F., Mark G.A., McMurray K.L., Meincke L.J., RA Morgan J., Moyzis R.K., Mundt M.O., Munk A.C., Nandkeshwar R.D., RA Pitluck S., Pollard M., Predki P., Parson-Quintana B., Ramirez L., Rash S., RA Retterer J., Ricke D.O., Robinson D.L., Rodriguez A., Salamov A., RA Saunders E.H., Scott D., Shough T., Stallings R.L., Stalvey M., RA Sutherland R.D., Tapia R., Tesmer J.G., Thayer N., Thompson L.S., Tice H., RA Torney D.C., Tran-Gyamfi M., Tsai M., Ulanovsky L.E., Ustaszewska A., RA Vo N., White P.S., Williams A.L., Wills P.L., Wu J.-R., Wu K., Yang J., RA DeJong P., Bruce D., Doggett N.A., Deaven L., Schmutz J., Grimwood J., RA Richardson P., Rokhsar D.S., Eichler E.E., Gilna P., Lucas S.M., RA Myers R.M., Rubin E.M., Pennacchio L.A.; RT "The sequence and analysis of duplication-rich human chromosome 16."; RL Nature 432:988-994(2004). RN [5] RP NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1), AND VARIANT LEU-180. 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 [6] RP TISSUE SPECIFICITY. RX PubMed=17885681; DOI=10.1172/jci30804; RA Seguchi O., Takashima S., Yamazaki S., Asakura M., Asano Y., Shintani Y., RA Wakeno M., Minamino T., Kondo H., Furukawa H., Nakamaru K., Naito A., RA Takahashi T., Ohtsuka T., Kawakami K., Isomura T., Kitamura S., Tomoike H., RA Mochizuki N., Kitakaze M.; RT "A cardiac myosin light chain kinase regulates sarcomere assembly in the RT vertebrate heart."; RL J. Clin. Invest. 117:2812-2824(2007). RN [7] RP PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-401 AND SER-408, AND RP IDENTIFICATION BY MASS 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 [8] RP VARIANT [LARGE SCALE ANALYSIS] ARG-390. RX PubMed=16959974; DOI=10.1126/science.1133427; RA Sjoeblom T., Jones S., Wood L.D., Parsons D.W., Lin J., Barber T.D., RA Mandelker D., Leary R.J., Ptak J., Silliman N., Szabo S., Buckhaults P., RA Farrell C., Meeh P., Markowitz S.D., Willis J., Dawson D., Willson J.K.V., RA Gazdar A.F., Hartigan J., Wu L., Liu C., Parmigiani G., Park B.H., RA Bachman K.E., Papadopoulos N., Vogelstein B., Kinzler K.W., RA Velculescu V.E.; RT "The consensus coding sequences of human breast and colorectal cancers."; RL Science 314:268-274(2006). CC -!- FUNCTION: Kinase that phosphorylates MYL2 in vitro. Promotes sarcomere CC formation in cardiomyocytes and increases cardiomyocyte contractility CC (By similarity). {ECO:0000250}. CC -!- CATALYTIC ACTIVITY: CC Reaction=ATP + L-seryl-[myosin light chain] = ADP + H(+) + O-phospho-L- CC seryl-[myosin light chain]; Xref=Rhea:RHEA:22004, Rhea:RHEA- CC COMP:13684, Rhea:RHEA-COMP:13685, ChEBI:CHEBI:15378, CC ChEBI:CHEBI:29999, ChEBI:CHEBI:30616, ChEBI:CHEBI:83421, CC ChEBI:CHEBI:456216; EC=2.7.11.18; CC -!- CATALYTIC ACTIVITY: CC Reaction=ATP + L-threonyl-[myosin light chain] = ADP + H(+) + O- CC phospho-L-threonyl-[myosin light chain]; Xref=Rhea:RHEA:53900, CC Rhea:RHEA-COMP:13686, Rhea:RHEA-COMP:13687, ChEBI:CHEBI:15378, CC ChEBI:CHEBI:30013, ChEBI:CHEBI:30616, ChEBI:CHEBI:61977, CC ChEBI:CHEBI:456216; EC=2.7.11.18; CC -!- COFACTOR: CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250}; CC -!- INTERACTION: CC Q32MK0; P62258: YWHAE; NbExp=2; IntAct=EBI-1222801, EBI-356498; CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}. CC -!- ALTERNATIVE PRODUCTS: CC Event=Alternative splicing; Named isoforms=2; CC Name=1; CC IsoId=Q32MK0-3; Sequence=Displayed; CC Name=2; CC IsoId=Q32MK0-4; Sequence=VSP_044312; CC -!- TISSUE SPECIFICITY: Restricted to heart. {ECO:0000269|PubMed:17885681}. CC -!- PTM: Phosphorylated on serine residues. {ECO:0000250}. CC -!- SIMILARITY: Belongs to the protein kinase superfamily. CAMK Ser/Thr CC protein kinase family. {ECO:0000305}. CC -!- SEQUENCE CAUTION: CC Sequence=AAI09098.2; Type=Erroneous initiation; Note=Truncated N-terminus.; Evidence={ECO:0000305}; CC Sequence=CAC42766.1; Type=Erroneous initiation; Note=Truncated N-terminus.; Evidence={ECO:0000305}; CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; AJ247087; CAC42766.1; ALT_INIT; mRNA. DR EMBL; AK299443; BAH13034.1; -; mRNA. DR EMBL; AB451455; BAG70269.1; -; mRNA. DR EMBL; AC007225; -; NOT_ANNOTATED_CDS; Genomic_DNA. DR EMBL; BC109097; AAI09098.2; ALT_INIT; mRNA. DR CCDS; CCDS10723.2; -. [Q32MK0-3] DR CCDS; CCDS76861.1; -. [Q32MK0-4] DR RefSeq; NP_001295230.1; NM_001308301.1. [Q32MK0-4] DR RefSeq; NP_872299.2; NM_182493.2. [Q32MK0-3] DR RefSeq; XP_006721397.1; XM_006721334.3. DR AlphaFoldDB; Q32MK0; -. DR SMR; Q32MK0; -. DR BioGRID; 124881; 11. DR IntAct; Q32MK0; 7. DR STRING; 9606.ENSP00000378288; -. DR BindingDB; Q32MK0; -. DR ChEMBL; CHEMBL4627; -. DR DrugBank; DB12010; Fostamatinib. DR DrugCentral; Q32MK0; -. DR iPTMnet; Q32MK0; -. DR PhosphoSitePlus; Q32MK0; -. DR BioMuta; MYLK3; -. DR DMDM; 254763411; -. DR jPOST; Q32MK0; -. DR MassIVE; Q32MK0; -. DR MaxQB; Q32MK0; -. DR PaxDb; 9606-ENSP00000378288; -. DR PeptideAtlas; Q32MK0; -. DR ProteomicsDB; 61603; -. [Q32MK0-3] DR ProteomicsDB; 6721; -. DR Pumba; Q32MK0; -. DR Antibodypedia; 28053; 303 antibodies from 27 providers. DR DNASU; 91807; -. DR Ensembl; ENST00000394809.9; ENSP00000378288.4; ENSG00000140795.13. [Q32MK0-3] DR Ensembl; ENST00000536476.5; ENSP00000439297.1; ENSG00000140795.13. [Q32MK0-4] DR GeneID; 91807; -. DR KEGG; hsa:91807; -. DR MANE-Select; ENST00000394809.9; ENSP00000378288.4; NM_182493.3; NP_872299.2. DR UCSC; uc002eei.5; human. [Q32MK0-3] DR AGR; HGNC:29826; -. DR CTD; 91807; -. DR DisGeNET; 91807; -. DR GeneCards; MYLK3; -. DR HGNC; HGNC:29826; MYLK3. DR HPA; ENSG00000140795; Group enriched (heart muscle, skeletal muscle, tongue). DR MIM; 612147; gene. DR neXtProt; NX_Q32MK0; -. DR OpenTargets; ENSG00000140795; -. DR PharmGKB; PA162396375; -. DR VEuPathDB; HostDB:ENSG00000140795; -. DR eggNOG; KOG0032; Eukaryota. DR GeneTree; ENSGT00940000160007; -. DR HOGENOM; CLU_000288_90_0_1; -. DR InParanoid; Q32MK0; -. DR OMA; IHVQEMD; -. DR OrthoDB; 5402680at2759; -. DR PhylomeDB; Q32MK0; -. DR TreeFam; TF314166; -. DR PathwayCommons; Q32MK0; -. DR SignaLink; Q32MK0; -. DR SIGNOR; Q32MK0; -. DR BioGRID-ORCS; 91807; 16 hits in 1185 CRISPR screens. DR ChiTaRS; MYLK3; human. DR GeneWiki; MYLK3; -. DR GenomeRNAi; 91807; -. DR Pharos; Q32MK0; Tchem. DR PRO; PR:Q32MK0; -. DR Proteomes; UP000005640; Chromosome 16. DR RNAct; Q32MK0; Protein. DR Bgee; ENSG00000140795; Expressed in cardiac muscle of right atrium and 139 other cell types or tissues. DR GO; GO:0015629; C:actin cytoskeleton; IEA:Ensembl. DR GO; GO:0005737; C:cytoplasm; ISS:BHF-UCL. DR GO; GO:0005829; C:cytosol; ISS:BHF-UCL. DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW. DR GO; GO:0004683; F:calmodulin-dependent protein kinase activity; ISS:BHF-UCL. DR GO; GO:0004687; F:myosin light chain kinase activity; ISS:BHF-UCL. DR GO; GO:0055003; P:cardiac myofibril assembly; ISS:BHF-UCL. DR GO; GO:0071347; P:cellular response to interleukin-1; IMP:BHF-UCL. DR GO; GO:0060298; P:positive regulation of sarcomere organization; ISS:BHF-UCL. DR GO; GO:0006468; P:protein phosphorylation; ISS:BHF-UCL. DR GO; GO:0002528; P:regulation of vascular permeability involved in acute inflammatory response; IMP:BHF-UCL. DR GO; GO:0045214; P:sarcomere organization; ISS:BHF-UCL. DR GO; GO:0048769; P:sarcomerogenesis; ISS:BHF-UCL. DR CDD; cd14192; STKc_MLCK3; 1. DR Gene3D; 1.10.510.10; Transferase(Phosphotransferase) domain 1; 1. DR InterPro; IPR011009; Kinase-like_dom_sf. DR InterPro; IPR000719; Prot_kinase_dom. DR InterPro; IPR017441; Protein_kinase_ATP_BS. DR InterPro; IPR008271; Ser/Thr_kinase_AS. DR PANTHER; PTHR24342:SF15; DEATH-ASSOCIATED PROTEIN KINASE 2; 1. DR PANTHER; PTHR24342; SERINE/THREONINE-PROTEIN KINASE 17; 1. DR Pfam; PF00069; Pkinase; 1. DR SMART; SM00220; S_TKc; 1. DR SUPFAM; SSF56112; Protein kinase-like (PK-like); 1. DR PROSITE; PS00107; PROTEIN_KINASE_ATP; 1. DR PROSITE; PS50011; PROTEIN_KINASE_DOM; 1. DR PROSITE; PS00108; PROTEIN_KINASE_ST; 1. DR Genevisible; Q32MK0; HS. PE 1: Evidence at protein level; KW Alternative splicing; ATP-binding; Cytoplasm; Kinase; Magnesium; KW Nucleotide-binding; Phosphoprotein; Reference proteome; KW Serine/threonine-protein kinase; Transferase. FT CHAIN 1..819 FT /note="Myosin light chain kinase 3" FT /id="PRO_0000272200" FT DOMAIN 515..770 FT /note="Protein kinase" FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00159" FT REGION 146..334 FT /note="Disordered" FT /evidence="ECO:0000256|SAM:MobiDB-lite" FT REGION 347..462 FT /note="Disordered" FT /evidence="ECO:0000256|SAM:MobiDB-lite" FT COMPBIAS 152..172 FT /note="Basic and acidic residues" FT /evidence="ECO:0000256|SAM:MobiDB-lite" FT ACT_SITE 636 FT /note="Proton acceptor" FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00159, FT ECO:0000255|PROSITE-ProRule:PRU10027" FT BINDING 521..529 FT /ligand="ATP" FT /ligand_id="ChEBI:CHEBI:30616" FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00159" FT BINDING 544 FT /ligand="ATP" FT /ligand_id="ChEBI:CHEBI:30616" FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00159" FT MOD_RES 152 FT /note="Phosphoserine" FT /evidence="ECO:0000250|UniProtKB:E9PT87" FT MOD_RES 355 FT /note="Phosphoserine" FT /evidence="ECO:0000250|UniProtKB:E9PT87" FT MOD_RES 401 FT /note="Phosphoserine" FT /evidence="ECO:0007744|PubMed:23186163" FT MOD_RES 408 FT /note="Phosphoserine" FT /evidence="ECO:0007744|PubMed:23186163" FT VAR_SEQ 1..341 FT /note="Missing (in isoform 2)" FT /evidence="ECO:0000303|PubMed:14702039" FT /id="VSP_044312" FT VARIANT 70 FT /note="S -> T (in dbSNP:rs9923813)" FT /id="VAR_058335" FT VARIANT 180 FT /note="V -> L (in dbSNP:rs28407821)" FT /evidence="ECO:0000269|PubMed:15489334, ECO:0000269|Ref.1" FT /id="VAR_058336" FT VARIANT 390 FT /note="G -> R (in a colorectal cancer sample; somatic FT mutation; dbSNP:rs141602742)" FT /evidence="ECO:0000269|PubMed:16959974" FT /id="VAR_035630" FT CONFLICT 149 FT /note="R -> G (in Ref. 2; BAG70269)" FT /evidence="ECO:0000305" FT CONFLICT 199 FT /note="G -> R (in Ref. 1; CAC42766)" FT /evidence="ECO:0000305" SQ SEQUENCE 819 AA; 88393 MW; 21148BBACB0FF0D9 CRC64; MSGTSKESLG HGGLPGLGKT CLTTMDTKLN MLNEKVDQLL HFQEDVTEKL QSMCRDMGHL ERGLHRLEAS RAPGPGGADG VPHIDTQAGW PEVLELVRAM QQDAAQHGAR LEALFRMVAA VDRAIALVGA TFQKSKVADF LMQGRVPWRR GSPGDSPEEN KERVEEEGGK PKHVLSTSGV QSDAREPGEE SQKADVLEGT AERLPPIRAS GLGADPAQAV VSPGQGDGVP GPAQAFPGHL PLPTKVEAKA PETPSENLRT GLELAPAPGR VNVVSPSLEV APGAGQGASS SRPDPEPLEE GTRLTPGPGP QCPGPPGLPA QARATHSGGE TPPRISIHIQ EMDTPGEMLM TGRGSLGPTL TTEAPAAAQP GKQGPPGTGR CLQAPGTEPG EQTPEGAREL SPLQESSSPG GVKAEEEQRA GAEPGTRPSL ARSDDNDHEV GALGLQQGKS PGAGNPEPEQ DCAARAPVRA EAVRRMPPGA EAGSVVLDDS PAPPAPFEHR VVSVKETSIS AGYEVCQHEV LGGGRFGQVH RCTEKSTGLP LAAKIIKVKS AKDREDVKNE INIMNQLSHV NLIQLYDAFE SKHSCTLVME YVDGGELFDR ITDEKYHLTE LDVVLFTRQI CEGVHYLHQH YILHLDLKPE NILCVNQTGH QIKIIDFGLA RRYKPREKLK VNFGTPEFLA PEVVNYEFVS FPTDMWSVGV ITYMLLSGLS PFLGETDAET MNFIVNCSWD FDADTFEGLS EEAKDFVSRL LVKEKSCRMS ATQCLKHEWL NNLPAKASRS KTRLKSQLLL QKYIAQRKWK KHFYVVTAAN RLRKFPTSP //