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Protein

Kit ligand

Gene

Kitlg

Organism
Rattus norvegicus (Rat)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Ligand for the receptor-type protein-tyrosine kinase KIT. Plays an essential role in the regulation of cell survival and proliferation, hematopoiesis, stem cell maintenance, gametogenesis, mast cell development, migration and function, and in melanogenesis. KITLG/SCF binding can activate several signaling pathways. Promotes phosphorylation of PIK3R1, the regulatory subunit of phosphatidylinositol 3-kinase, and subsequent activation of the kinase AKT1. KITLG/SCF and KIT also transmit signals via GRB2 and activation of RAS, RAF1 and the MAP kinases MAPK1/ERK2 and/or MAPK3/ERK1. KITLG/SCF and KIT promote activation of STAT family members STAT1, STAT3 and STAT5. KITLG/SCF and KIT promote activation of PLCG1, leading to the production of the cellular signaling molecules diacylglycerol and inositol 1,4,5-trisphosphate. KITLG/SCF acts synergistically with other cytokines, probably interleukins.

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionGrowth factor
Biological processCell adhesion

Enzyme and pathway databases

ReactomeiR-RNO-1257604 PIP3 activates AKT signaling
R-RNO-1433557 Signaling by SCF-KIT
R-RNO-1433559 Regulation of KIT signaling
R-RNO-5673001 RAF/MAP kinase cascade
R-RNO-6811558 PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling

Names & Taxonomyi

Protein namesi
Recommended name:
Kit ligand
Alternative name(s):
Hematopoietic growth factor KL
Mast cell growth factor
Short name:
MGF
Stem cell factor
Short name:
SCF
c-Kit ligand
Cleaved into the following chain:
Soluble KIT ligand
Short name:
sKITLG
Gene namesi
Name:Kitlg
Synonyms:Kitl, Mgf
OrganismiRattus norvegicus (Rat)
Taxonomic identifieri10116 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeRattus
Proteomesi
  • UP000002494 Componenti: Chromosome 7

Organism-specific databases

RGDi3086 Kitlg

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini26 – 214ExtracellularSequence analysisAdd BLAST189
Transmembranei215 – 237HelicalSequence analysisAdd BLAST23
Topological domaini238 – 273CytoplasmicSequence analysisAdd BLAST36

Keywords - Cellular componenti

Cell membrane, Cell projection, Cytoplasm, Cytoskeleton, Membrane, Secreted

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Signal peptidei1 – 252 PublicationsAdd BLAST25
ChainiPRO_000003191726 – 273Kit ligandAdd BLAST248
ChainiPRO_000040339326 – 190Soluble KIT ligandBy similarityAdd BLAST165

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei26Pyrrolidone carboxylic acid1 Publication1
Disulfide bondi29 ↔ 1141 Publication
Disulfide bondi68 ↔ 1631 Publication
Glycosylationi90N-linked (GlcNAc...) asparagine; partial1 Publication1
Glycosylationi134N-linked (GlcNAc...) asparagine; partial1 Publication1
Glycosylationi145N-linked (GlcNAc...) asparagine1 Publication1
Glycosylationi167O-linked (GalNAc...) serine1 Publication1
Glycosylationi168O-linked (GalNAc...) threonine1 Publication1
Glycosylationi180O-linked (GalNAc...) threonine1 Publication1
Glycosylationi195N-linked (GlcNAc...) asparagineSequence analysis1

Post-translational modificationi

A soluble form is produced by proteolytic processing of isoform 1 in the extracellular domain.
The identity of N- and O-linked saccharides are not reported in PubMed:1708771. The O-linked polysaccharides are probably the mucin type linked to GalNAc.1 Publication

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sitei97Not glycosylated1 Publication1

Keywords - PTMi

Disulfide bond, Glycoprotein, Pyrrolidone carboxylic acid

Proteomic databases

PaxDbiP21581

PTM databases

iPTMnetiP21581
PhosphoSitePlusiP21581

Expressioni

Developmental stagei

Acts in the early stages of hematopoiesis.

Gene expression databases

BgeeiENSRNOG00000005386
ExpressionAtlasiP21581 baseline and differential
GenevisibleiP21581 RN

Interactioni

Subunit structurei

Homodimer, non-covalently linked (Probable). Heterotetramer with KIT, binding two KIT molecules; thereby mediates KIT dimerization and subsequent activation by autophosphorylation.Curated

GO - Molecular functioni

Protein-protein interaction databases

STRINGi10116.ENSRNOP00000008471

Structurei

3D structure databases

ProteinModelPortaliP21581
SMRiP21581
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the SCF family.Curated

Keywords - Domaini

Signal, Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG410IF3Y Eukaryota
ENOG410XYQR LUCA
GeneTreeiENSGT00390000018272
HOGENOMiHOG000082493
HOVERGENiHBG036146
InParanoidiP21581
KOiK05461
OMAiVKTKGIC
OrthoDBiEOG091G0I23
PhylomeDBiP21581
TreeFamiTF330811

Family and domain databases

InterProiView protein in InterPro
IPR009079 4_helix_cytokine-like_core
IPR003452 SCF
PANTHERiPTHR11574 PTHR11574, 1 hit
PfamiView protein in Pfam
PF02404 SCF, 1 hit
PIRSFiPIRSF015599 SCF, 1 hit
SUPFAMiSSF47266 SSF47266, 1 hit

Sequences (2)i

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

This entry describes 2 isoformsi produced by alternative splicing. AlignAdd to basket

Isoform 1 (identifier: P21581-1) [UniParc]FASTAAdd to basket
Also known as: KL-1

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide

        10         20         30         40         50
MKKTQTWIIT CIYLQLLLFN PLVKTQEICR NPVTDNVKDI TKLVANLPND
60 70 80 90 100
YMITLNYVAG MDVLPSHCWL RDMVTHLSVS LTTLLDKFSN ISEGLSNYSI
110 120 130 140 150
IDKLGKIVDD LVACMEENAP KNVKESLKKP ETRNFTPEEF FSIFNRSIDA
160 170 180 190 200
FKDFMVASDT SDCVLSSTLG PEKDSRVSVT KPFMLPPVAA SSLRNDSSSS
210 220 230 240 250
NRKAAKSPED PGLQWTAMAL PALISLVIGF AFGALYWKKK QSSLTRAVEN
260 270
IQINEEDNEI SMLQQKEREF QEV
Length:273
Mass (Da):30,712
Last modified:August 30, 2002 - v2
Checksum:iC0F56527DC93FD27
GO
Isoform 2 (identifier: P21581-2) [UniParc]FASTAAdd to basket
Also known as: KL-2

The sequence of this isoform differs from the canonical sequence as follows:
     174-202: DSRVSVTKPFMLPPVAASSLRNDSSSSNR → G

Show »
Length:245
Mass (Da):27,681
Checksum:i9615130876AC9D52
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti207S → P in AAD02828 (Ref. 1) Curated1

Alternative sequence

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Alternative sequenceiVSP_006025174 – 202DSRVS…SSSNR → G in isoform 2. 1 PublicationAdd BLAST29

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF071204 mRNA Translation: AAD02827.1
AF071205 mRNA Translation: AAD02828.1
M59966 mRNA Translation: AAA42117.1
PIRiB35974
RefSeqiNP_068615.1, NM_021843.4 [P21581-1]
UniGeneiRn.44216

Genome annotation databases

EnsembliENSRNOT00000007231; ENSRNOP00000007231; ENSRNOG00000005386 [P21581-2]
ENSRNOT00000008471; ENSRNOP00000008471; ENSRNOG00000005386 [P21581-1]
GeneIDi60427
KEGGirno:60427

Keywords - Coding sequence diversityi

Alternative splicing

Similar proteinsi

Entry informationi

Entry nameiSCF_RAT
AccessioniPrimary (citable) accession number: P21581
Secondary accession number(s): Q9QWZ4, Q9Z2E7
Entry historyiIntegrated into UniProtKB/Swiss-Prot: May 1, 1991
Last sequence update: August 30, 2002
Last modified: November 22, 2017
This is version 134 of the entry and version 2 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Direct protein sequencing, Reference proteome
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health