PF4 — Platelet factor 4
PF4 belongs to a gene co-expression module in 1 of 28 SCUBA cell types. Each module groups genes that rise and fall together in that cell type; the genes it shares a module with are its closest co-expression partners there.
PF4's module in each cell type
| Cell type | Module | Shares the module with | |
|---|---|---|---|
| Hematopoietic progenitor cells | Platelet Biogenesis Myeloid development | CAVIN2, CCL5, CMTM5, F13A1, GNG11, GP9, MAP3K7CL, NRGN +6 more |
About the gene
| Synonyms | CXCL4, SCYB4 |
|---|---|
| Chromosome | 4: 73980811-73982027 |
| Predicted location | Secreted |
| Essential gene | No |
| Protein class | Cancer-related genes, Candidate cardiovascular disease genes, Plasma proteins, Predicted secreted proteins |
| Molecular function | Cytokine, Heparin-binding |
| Biological process | Chemotaxis |
Function
Chemokine released during platelet aggregation that plays a role in different biological processes including hematopoiesis, cell proliferation, differentiation, and activation. Acts via different functional receptors including CCR1, CXCR3A or CXCR3B. Upon interaction with CXCR3A receptor, induces activated T-lymphocytes migration mediated via downstream Ras/extracellular signal-regulated kinase (ERK) signaling. Neutralizes the anticoagulant effect of heparin by binding more strongly to heparin than to the chondroitin-4-sulfate chains of the carrier molecule. Plays a role in the inhibition of hematopoiesis and in the maintenance of hematopoietic stem cell (HSC) quiescence. Chemotactic for neutrophils and monocytes via CCR1. Inhibits endothelial cell proliferation. In cooperation with toll-like receptor 8/TLR8, induces chromatin remodeling and activates inflammatory gene expression via the TBK1-IRF5 axis. In addition, induces myofibroblast differentiation and collagen synthesis in different precursor cells, including endothelial cells, by stimulating endothelial-to-mesenchymal transition. Interacts with thrombomodulin/THBD to enhance the activation of protein C and thus potentiates its anticoagulant activity.
Human Protein Atlas · Open Targets · UniProt
Gene annotation from the Human Protein Atlas and UniProt; see sources & licences.