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:
- 215-237, 23 AA, Helical. {ECO:0000255}.
Sequence: 273 AA
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) | (°) | ||
| Model 1 | SLHWAAMALAALFSLIIGFAFGALYWKKR | 6.8 | -42.8° | 2.4 | 44.1 | -36.1 |
| Model 2 | SLHWAAMALAALFSLIIGFAFGALYWKKR | 7.2 | -31.1° | 5.3 | 34.8 | -33.3 |
| Model 3 | SLHWAAMALAALFSLIIGFAFGALYWKKR | 6.6 | -54.9° | 2.4 | 48.4 | -26.5 |
| Model 4 | SLHWAAMALAALFSLIIGFAFGALYWKKR | 7.4 | -28.0° | 1.5 | 47.9 | -18.8 |
| Model 5 | SLHWAAMALAALFSLIIGFAFGALYWKKR | 7.0 | -42.0° | 1.9 | 33.1 | -4.2 |
| Model 6 | SLHWAAMALAALFSLIIGFAFGALYWKKR | 7.3 | -34.0° | 2.7 | 38.0 | -2.2 |
| Prolines* | 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:
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 |






