ID A0A452RI37_URSAM Unreviewed; 994 AA.
AC A0A452RI37;
DT 08-MAY-2019, integrated into UniProtKB/TrEMBL.
DT 08-MAY-2019, sequence version 1.
DT 28-JAN-2026, entry version 36.
DE RecName: Full=Mast/stem cell growth factor receptor Kit {ECO:0000256|ARBA:ARBA00014417};
DE EC=2.7.10.1 {ECO:0000256|ARBA:ARBA00011902};
DE AltName: Full=Proto-oncogene c-Kit {ECO:0000256|ARBA:ARBA00032530};
DE AltName: Full=Tyrosine-protein kinase Kit {ECO:0000256|ARBA:ARBA00032147, ECO:0000256|ARBA:ARBA00078250};
GN Name=KIT {ECO:0000313|Ensembl:ENSUAMP00000018584.1};
OS Ursus americanus (American black bear) (Euarctos americanus).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC Eutheria; Laurasiatheria; Carnivora; Caniformia; Ursidae; Ursus.
OX NCBI_TaxID=9643 {ECO:0000313|Ensembl:ENSUAMP00000018584.1, ECO:0000313|Proteomes:UP000291022};
RN [1] {ECO:0000313|Proteomes:UP000291022}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RA Korstanje R., Srivastava A., Sarsani V.K., Sheehan S.M., Seger R.L.,
RA Barter M.E., Lindqvist C., Brody L.C., Mullikin J.C.;
RT "De novo assembly and RNA-Seq shows season-dependent expression and editing
RT in black bear kidneys.";
RL Submitted (JUN-2016) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|Ensembl:ENSUAMP00000018584.1}
RP IDENTIFICATION.
RG Ensembl;
RL Submitted (AUG-2025) to UniProtKB.
RN [3] {ECO:0000313|Ensembl:ENSUAMP00000018584.1}
RP IDENTIFICATION.
RG Ensembl;
RL Submitted (SEP-2025) to UniProtKB.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=L-tyrosyl-[protein] + ATP = O-phospho-L-tyrosyl-[protein] +
CC ADP + H(+); Xref=Rhea:RHEA:10596, Rhea:RHEA-COMP:10136, Rhea:RHEA-
CC COMP:20101, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616, ChEBI:CHEBI:46858,
CC ChEBI:CHEBI:61978, ChEBI:CHEBI:456216; EC=2.7.10.1;
CC Evidence={ECO:0000256|ARBA:ARBA00051243};
CC -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000256|ARBA:ARBA00004251};
CC Single-pass type I membrane protein {ECO:0000256|ARBA:ARBA00004251}.
CC Membrane {ECO:0000256|RuleBase:RU000311}; Single-pass type I membrane
CC protein {ECO:0000256|RuleBase:RU000311}.
CC -!- SIMILARITY: Belongs to the protein kinase superfamily. Tyr protein
CC kinase family. CSF-1/PDGF receptor subfamily.
CC {ECO:0000256|RuleBase:RU000311}.
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DR AlphaFoldDB; A0A452RI37; -.
DR Ensembl; ENSUAMT00000020793.1; ENSUAMP00000018584.1; ENSUAMG00000014061.1.
DR GeneTree; ENSGT00940000155626; -.
DR Proteomes; UP000291022; Unassembled WGS sequence.
DR GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0043235; C:receptor complex; IEA:TreeGrafter.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0019955; F:cytokine binding; IEA:InterPro.
DR GO; GO:0019838; F:growth factor binding; IEA:TreeGrafter.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0004714; F:transmembrane receptor protein tyrosine kinase activity; IEA:UniProtKB-EC.
DR GO; GO:0030183; P:B cell differentiation; IEA:TreeGrafter.
DR GO; GO:0016477; P:cell migration; IEA:UniProtKB-ARBA.
DR GO; GO:0006935; P:chemotaxis; IEA:UniProtKB-ARBA.
DR GO; GO:0038093; P:Fc receptor signaling pathway; IEA:InterPro.
DR GO; GO:0008406; P:gonad development; IEA:UniProtKB-ARBA.
DR GO; GO:0002244; P:hematopoietic progenitor cell differentiation; IEA:TreeGrafter.
DR GO; GO:0038109; P:Kit signaling pathway; IEA:InterPro.
DR GO; GO:0070662; P:mast cell proliferation; IEA:UniProtKB-ARBA.
DR GO; GO:0030335; P:positive regulation of cell migration; IEA:TreeGrafter.
DR GO; GO:0002720; P:positive regulation of cytokine production involved in immune response; IEA:UniProtKB-ARBA.
DR GO; GO:0046427; P:positive regulation of receptor signaling pathway via JAK-STAT; IEA:TreeGrafter.
DR GO; GO:0042127; P:regulation of cell population proliferation; IEA:UniProtKB-ARBA.
DR GO; GO:0050793; P:regulation of developmental process; IEA:UniProtKB-ARBA.
DR CDD; cd00096; Ig; 1.
DR CDD; cd05860; IgI_4_SCFR; 1.
DR CDD; cd05104; PTKc_Kit; 1.
DR FunFam; 1.10.510.10:FF:000177; Mast/stem cell growth factor receptor; 1.
DR FunFam; 2.60.40.10:FF:000422; Mast/stem cell growth factor receptor; 1.
DR FunFam; 2.60.40.10:FF:000429; Mast/stem cell growth factor receptor; 1.
DR FunFam; 2.60.40.10:FF:000469; Mast/stem cell growth factor receptor; 1.
DR FunFam; 2.60.40.10:FF:000544; Mast/stem cell growth factor receptor; 1.
DR FunFam; 2.60.40.10:FF:000815; Mast/stem cell growth factor receptor; 1.
DR FunFam; 3.30.200.20:FF:000025; Platelet-derived growth factor receptor alpha; 1.
DR Gene3D; 2.60.40.10; Immunoglobulins; 5.
DR Gene3D; 3.30.200.20; Phosphorylase Kinase, domain 1; 1.
DR Gene3D; 1.10.510.10; Transferase(Phosphotransferase) domain 1; 1.
DR InterPro; IPR007110; Ig-like_dom.
DR InterPro; IPR036179; Ig-like_dom_sf.
DR InterPro; IPR013783; Ig-like_fold.
DR InterPro; IPR003599; Ig_sub.
DR InterPro; IPR003598; Ig_sub2.
DR InterPro; IPR013151; Immunoglobulin_dom.
DR InterPro; IPR011009; Kinase-like_dom_sf.
DR InterPro; IPR000719; Prot_kinase_dom.
DR InterPro; IPR017441; Protein_kinase_ATP_BS.
DR InterPro; IPR050122; RTK.
DR InterPro; IPR027263; SCGF_receptor.
DR InterPro; IPR001245; Ser-Thr/Tyr_kinase_cat_dom.
DR InterPro; IPR008266; Tyr_kinase_AS.
DR InterPro; IPR020635; Tyr_kinase_cat_dom.
DR InterPro; IPR001824; Tyr_kinase_rcpt_3_CS.
DR PANTHER; PTHR24416:SF46; MAST_STEM CELL GROWTH FACTOR RECEPTOR KIT; 1.
DR PANTHER; PTHR24416; TYROSINE-PROTEIN KINASE RECEPTOR; 1.
DR Pfam; PF00047; ig; 1.
DR Pfam; PF25305; Ig_PDGFR_d4; 1.
DR Pfam; PF07714; PK_Tyr_Ser-Thr; 1.
DR PIRSF; PIRSF500951; SCGF_recepter; 1.
DR PIRSF; PIRSF000615; TyrPK_CSF1-R; 1.
DR SMART; SM00409; IG; 4.
DR SMART; SM00408; IGc2; 2.
DR SMART; SM00219; TyrKc; 1.
DR SUPFAM; SSF48726; Immunoglobulin; 4.
DR SUPFAM; SSF56112; Protein kinase-like (PK-like); 1.
DR PROSITE; PS50835; IG_LIKE; 2.
DR PROSITE; PS00107; PROTEIN_KINASE_ATP; 1.
DR PROSITE; PS50011; PROTEIN_KINASE_DOM; 1.
DR PROSITE; PS00109; PROTEIN_KINASE_TYR; 1.
DR PROSITE; PS00240; RECEPTOR_TYR_KIN_III; 1.
PE 3: Inferred from homology;
KW ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|PIRSR:PIRSR000615-
KW 2}; Cell membrane {ECO:0000256|ARBA:ARBA00022475};
KW Disulfide bond {ECO:0000256|ARBA:ARBA00023157};
KW Glycoprotein {ECO:0000256|ARBA:ARBA00023180};
KW Immunoglobulin domain {ECO:0000256|ARBA:ARBA00023319,
KW ECO:0000256|RuleBase:RU000311}; Kinase {ECO:0000256|ARBA:ARBA00022777};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|PIRSR:PIRSR000615-3};
KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|SAM:Phobius};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723,
KW ECO:0000256|PIRSR:PIRSR000615-3};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741,
KW ECO:0000256|PIRSR:PIRSR000615-2};
KW Phosphoprotein {ECO:0000256|ARBA:ARBA00022553};
KW Receptor {ECO:0000256|ARBA:ARBA00023170, ECO:0000256|RuleBase:RU000311};
KW Reference proteome {ECO:0000313|Proteomes:UP000291022};
KW Repeat {ECO:0000256|ARBA:ARBA00022737};
KW Signal {ECO:0000256|ARBA:ARBA00022729, ECO:0000256|SAM:SignalP};
KW Transferase {ECO:0000256|ARBA:ARBA00022679};
KW Transmembrane {ECO:0000256|ARBA:ARBA00022692,
KW ECO:0000256|RuleBase:RU000311};
KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989,
KW ECO:0000256|SAM:Phobius};
KW Tyrosine-protein kinase {ECO:0000256|ARBA:ARBA00023137};
KW Ubl conjugation {ECO:0000256|ARBA:ARBA00022843}.
FT SIGNAL 1..25
FT /evidence="ECO:0000256|SAM:SignalP"
FT CHAIN 26..994
FT /note="Mast/stem cell growth factor receptor Kit"
FT /evidence="ECO:0000256|SAM:SignalP"
FT /id="PRO_5019276071"
FT TRANSMEM 521..543
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT DOMAIN 212..308
FT /note="Ig-like"
FT /evidence="ECO:0000259|PROSITE:PS50835"
FT DOMAIN 413..507
FT /note="Ig-like"
FT /evidence="ECO:0000259|PROSITE:PS50835"
FT DOMAIN 589..928
FT /note="Protein kinase"
FT /evidence="ECO:0000259|PROSITE:PS50011"
FT ACT_SITE 792
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|PIRSR:PIRSR000615-1"
FT BINDING 568
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|PIRSR:PIRSR000615-3"
FT BINDING 596..603
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|PIRSR:PIRSR000615-2"
FT BINDING 623
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|PIRSR:PIRSR000615-2,
FT ECO:0000256|PROSITE-ProRule:PRU10141"
FT BINDING 671..677
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|PIRSR:PIRSR000615-2"
FT BINDING 796
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000256|PIRSR:PIRSR000615-2"
FT BINDING 797
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|PIRSR:PIRSR000615-3"
FT BINDING 810
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|PIRSR:PIRSR000615-3"
SQ SEQUENCE 994 AA; 111504 MW; 9ED89462717435C1 CRC64;
MRGAHGAWDF LCVLLLLFRV QPGSSQPSVS PGELSLPSIH PAKSELIVSA GDEIRLLCTD
PGFVKWTFET PGQLSESTHN EWITEKAQAA NTGNYTCTNR EGLSRSIYVF VRDPAELFLV
DLRLYGKEDN DTLVRCPLTD PEVTNYSLRG CEGKPLPKDL TFVADPKAGI TIRNVKREYH
RLCLHCSADQ KGKPVLSAKF TLKVRAAIRA VPVVLVSKAS SLLREGEEFS VTCLVKDVSS
SVDSMWIKEN SQTNAQTQSN SWHQGDFNFV RQERLTISSA RVNDSGVFMC YANNTFGSAN
VTTTLEVVDK GFINIFPMMN TTIFVNDGEN VDLVVEYEAY PRPEHRHWVY MNRSFADKWE
DYPKSDNESN IRYVSELHLT RLKGNEGGTY TFQVSNSDVN SSVTFNVYVN TKPEILTHES
LVNGMLQCVV AGFPEPTVDW YFCPGTEQRC SAPVGPMDVQ MQNSSVAPSG KLVVQSSIDY
SAFKHNGTVE CRAYNNVGRS SAFFNFAFKG NSKEQIHPHT LFTPLLIGFV IAAGMMCIIV
MILTYKYLQK PMYEVQWKVV EEINGNNYVY IDPTQLPYDH KWEFPRNRLS FGKTLGAGAF
GKVVEATAYG LIKSDAAMTV AVKMLKPSAH LTEREALMSE LKVLSYLGNH MNIVNLLGAC
TVGGPTLVIT EYCCYGDLLN FLRRKRDSFI CSKQEDHAEV ALYKNLLHSK ESSCNDSTNE
YMDMKPGVSY VVPTKADKRR SARIGSYIER DVTPAIMEDD ELALDLEDLL SFSYQVAKGM
AFLASKNCIH RDLAARNILL THGRITKICD FGLARDIKND SNYVVKGNAR LPVKWMAPES
IFNCVYTFES DVWSYGIFLW ELFSLGSSPY PGMPVDSKFY RMIKEGFRML SPEHAPAEMY
DIMKTCWDAD PLKRPTFKQI VQLIEKQISE STNHVSTLRP PLGSRFPFWG SGGSGTQPFS
PWLREDTTDI SGLKLGLLGV RACFKLNSIS HPRV
//
