Kit ligand

UniProt data

UniProt name: SCF_HUMAN (P21583)

Gene name: KITLG; Synonyms=MGF, SCF

Organism: Homo sapiens (Human).

Function: 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.

Subcellular location: Soluble KIT ligand: Secreted.

Transmembrane domains:

  1. 215-237, 23 AA, Helical. {ECO:0000255}.

Sequence: 273 AA

10 20 30 40 50 60 MKKTQTWILT CIYLQLLLFN PLVKTEGICR NRVTNNVKDV TKLVANLPKD YMITLKYVPG 70 80 90 100 110 120 MDVLPSHCWI SEMVVQLSDS LTDLLDKFSN ISEGLSNYSI IDKLVNIVDD LVECVKENSS 130 140 150 160 170 180 KDLKKSFKSP EPRLFTPEEF FRIFNRSIDA FKDFVVASET SDCVVSSTLS PEKDSRVSVT 190 200 210 220 230 240 KPFMLPPVAA SSLRNDSSSS NRKAKNPPGD SSLHWAAMAL PALFSLIIGF AFGALYWKKR 250 260 270 QPSLTRAVEN IQINEEDNEI SMLQEKEREF QEV

CATM prediction

The sequence of SCF_HUMAN returned 6 potential models

The positions at the dimer's interface are highlighted in yellow. The position at the crossing point is highlighted in orange.

# Sequence and interface d θ Z' ω' Score
          220       230       2
   +    |    +    |    +    |
(Å) (°) (Å) (°)  
SLHWAAMALAALFSLIIGFAFGALYWKKR 6.8 -42.8° 2.4 44.1 -36.1
SLHWAAMALAALFSLIIGFAFGALYWKKR 7.2 -31.1° 5.3 34.8 -33.3
SLHWAAMALAALFSLIIGFAFGALYWKKR 6.6 -54.9° 2.4 48.4 -26.5
SLHWAAMALAALFSLIIGFAFGALYWKKR 7.4 -28.0° 1.5 47.9 -18.8
SLHWAAMALAALFSLIIGFAFGALYWKKR 7.0 -42.0° 1.9 33.1 -4.2
SLHWAAMALAALFSLIIGFAFGALYWKKR 7.3 -34.0° 2.7 38.0 -2.2
SLHWAAMALPALFSLIIGFAFGALYWKKR          

* Note: this sequence contains Pro residues. CATM substituted them with Ala during the modeling. The positions are marked.

Click on the model number to visualize its details below.

MODEL 1 DETAILS

Precited structure:


Click on the image to enlarge

Download model 1 structure: PDB, PyMOL session

List of hydrogen bonds:

Donor Acceptor Distance
B, 222, ALA, HA A, 225, SER, OG 3.09Å
B, 226, LEU, HA A, 225, SER, O 2.80Å
B, 229, GLY, HA1 A, 226, LEU, O 2.71Å
B, 230, PHE, HA A, 229, GLY, O 3.11Å
A, 222, ALA, HA B, 225, SER, OG 3.42Å
A, 226, LEU, HA B, 225, SER, O 2.80Å
A, 229, GLY, HA1 B, 226, LEU, O 2.71Å
A, 230, PHE, HA B, 229, GLY, O 3.11Å