| Tissue Specificity | Widely expressed. Expression is frequently down-regulated in cancer cell lines. Isoform 5 is widely expressed. Expressed in placenta (at protein level). |
| Function | Seems to function as a negative regulator of members of the IAP (inhibitor of apoptosis protein) family. Inhibits anti-caspase activity of BIRC4. Induces cleavage and inactivation of BIRC4 independent of caspase activation. Mediates TNF-alpha-induced apoptosis and is involved in apoptosis in trophoblast cells. May inhibit BIRC4 indirectly by activating the mitochondrial apoptosis pathway. After translocation to mitochondria, promotes translocation of BAX to mitochondria and cytochrome c release from mitochondria. Seems to promote the redistribution of BIRC4 from the cytoplasm to the nucleus, probably independent of BIRC4 inactivation which seems to occur in the cytoplasm. The BIRC4-XAF1 complex mediates down-regulation of BIRC5/survivin.the process requires the E3 ligase activity of BIRC4. Seems to be involved in cellular sensitivity to the proapoptotic actions of TRAIL. May be a tumor suppressor by mediating apoptosis resistance of cancer cells. |
| Protein Name | Xiap-Associated Factor 1Birc4-Binding Protein |
| Database Links | Reactome: R-HSA-909733 |
| Cellular Localisation | CytoplasmNucleusMitochondrionFound In The Cytoplasm And Nucleus Of Placental SyncytiotrophoblastsTranslocates To Mitochondria Upon Tnf-Alpha TreatmentIsoform 1: NucleusIsoform 5: Nucleus |
| Alternative Antibody Names | Anti-Xiap-Associated Factor 1 antibodyAnti-Birc4-Binding Protein antibodyAnti-XAF1 antibodyAnti-BIRC4BP antibodyAnti-XIAPAF1 antibody |
Information sourced from Uniprot.org
