MPYS is a recently identified plasma membrane tetraspanner that is associated with major histocompatibility complex class II (MHC-II) and mediates its transduction of apoptotic signals. It has also been found to be associated with VISA, a mitochondrial protein that acts as an adaptor in virus-triggered signaling. MPYS also interacts with IRF3 and recruits the kinase TBK1 to the VISA-associated complex, acting as a critical mediator of virus-triggered IRF3 activation and interferon (IFN) expression. It is thought that the binding of nucleic acid to the innate immune protein RIG-I causes complex formation between RIG-I, VISA, and MPYS. This complex then recruits TBK1 to phosphorylate IRF3 which then directly activates IFN transcription. At least three isoforms of MPYS are known to exist.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: endoplasmic reticulum IFN stimulator; Endoplasmic reticulum interferon stimulator; ERIS; hMITA; hSTING; Mediator of IRF3 activation; MITA; mitochondrial mediator of IRF3 activation; MPYS; N-terminal methionine-proline-tyrosine-serine plasma membrane tetraspanner; NET23; stimulator of in; Stimulator of interferon genes protein; Transmembrane protein 173
Gene Aliases: ERIS; hMITA; hSTING; MITA; MPYS; NET23; SAVI; STING; TMEM173
UniProt ID: (Human) Q86WV6
Entrez Gene ID: (Human) 340061