Mitochondrial Antiviral Signaling Protein (MAVS) Human Recombinant Protein

This gene encodes an intermediary protein necessary in the virus-triggered beta interferon signaling pathways. It is required for activation of transcription factors which regulate expression of beta interferon and contributes to antiviral immunity. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2011]

MAVS: Required for innate immune defense against viruses. Acts downstream of DDX58/RIG-I and IFIH1/MDA5, which detect intracellular dsRNA produced during viral replication, to coordinate pathways leading to the activation of NF-kappa-B, IRF3 and IRF7, and to the subsequent induction of antiviral cytokines such as IFN-beta and RANTES (CCL5). May activate the same pathways following detection of extracellular dsRNA by TLR3. May protect cells from apoptosis. Interacts with DDX58/RIG-I, IFIH1/MDA5, TRAF2 and TRAF6. May interact with IRF3, FADD, RIPK1, CHUK and IKBKB. Does not interact with TBK1. Interacts with and is cleaved by HCV and hepatitis GB virus B NS3/4A proteases. Interacts with and is cleaved by HHAV protein 3ABC. Interacts with NLRX1. Interaction with NLRX1 requires the CARD domain. Interacts with PSMA7. Interacts with TRAFD1. Interacts (via C-terminus) with PCBP2 in a complex containing MAVS/IPS1, PCBP2 and ITCH. Interacts with CYLD. Interacts with SRC. Interacts with DHX58/LGP2 and IKBKE. Present in T-cells, monocytes, epithelial cells and hepatocytes. Ubiquitously expressed, with highest levels in heart, skeletal muscle, liver, placenta and peripheral blood leukocytes. 3 isoforms of the human protein are produced by alternative splicing.

Protein type: Membrane protein, integral; Adaptor/scaffold

Chromosomal Location of Human Ortholog: 20p13

Cellular Component: peroxisomal membrane; mitochondrial outer membrane; mitochondrion; mitochondrial membrane; integral to membrane

Molecular Function: signal transducer activity; protein binding; CARD domain binding; protein kinase binding

Biological Process: positive regulation of I-kappaB kinase/NF-kappaB cascade; viral reproduction; positive regulation of protein import into nucleus, translocation; positive regulation of tumor necrosis factor production; signal transduction; positive regulation of interleukin-8 production; negative regulation of viral genome replication; defense response to bacterium; positive regulation of interferon-beta production; positive regulation of transcription factor import into nucleus; innate immune response; positive regulation of transcription factor activity; positive regulation of transcription from RNA polymerase II promoter; positive regulation of protein amino acid phosphorylation; positive regulation of defense response to virus by host; activation of innate immune response; defense response to virus; negative regulation of interferon type I production; positive regulation of interferon-alpha production