PACS-1 (CRA_a) is a 963aa rich regulatory protein involved in protein trafficking and belongs to the PACS family. A coat protein involved in controlling the correct subcellular localization of trans-Golgi network (TGN) membrane proteins that contain acidic cluster sorting motifs, PACS-1 is also known to be involved in HIV-1 Nef-mediated removal of MHC-I from the cell surface to the TGN, thus enabling HIV-1 to escape immune surveillance. PACS-1 also controls the endosome to Golgi trafficking of furin and mannose-6-phosphate receptor by connecting the acidic-cluster-containing cytoplasmic domain of these molecules with the adapter-protein complex-1 (AP-1) of endosomal clathrin coated membrane pits. Usually seen in golgi apparatus, trans-Golgi network and localized in the paranuclear region, it is ubiquitously expressed in most of the tissues.
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.