TRIM22

The protein encoded by this gene is a member of the tripartite motif (TRIM) family. The TRIM motif includes three zinc-binding domains, a RING, a B-box type 1 and a B-box type 2, and a coiled-coil region. This protein localizes to the cytoplasm and its expression is induced by interferon. The protein down-regulates transcription from the HIV-1 LTR promoter region, suggesting that function of this protein may be to mediate interferon's antiviral effects. Alternative splicing results in multiple transcript variants.

Full Name

tripartite motif containing 22

Function

Interferon-induced antiviral protein involved in cell innate immunity. The antiviral activity could in part be mediated by TRIM22-dependent ubiquitination of viral proteins. Plays a role in restricting the replication of HIV-1, encephalomyocarditis virus (EMCV) and hepatitis B virus (HBV). Acts as a transcriptional repressor of HBV core promoter. May have E3 ubiquitin-protein ligase activity.

Biological Process

Biological Process defense response to virus Source:UniProtKB-KW
Biological Process immune response Source:ProtInc1 Publication
Biological Process innate immune response Source:GO_Central1 Publication
Biological Process positive regulation of autophagy Source:UniProtKB1 Publication
Biological Process positive regulation of DNA-binding transcription factor activity Source:UniProtKB1 Publication
Biological Process positive regulation of I-kappaB kinase/NF-kappaB signaling Source:UniProtKB1 Publication
Biological Process positive regulation of NF-kappaB transcription factor activity Source:UniProtKB1 Publication
Biological Process protein polyubiquitination Source:GO_Central1 Publication
Biological Process protein ubiquitination Source:GO_Central1 Publication
Biological Process regulation of DNA-templated transcription Source:ProtInc1 Publication
Biological Process regulation of gene expression Source:GO_Central1 Publication
Biological Process regulation of protein localization Source:UniProtKB1 Publication
Biological Process regulation of viral entry into host cell Source:GO_Central1 Publication
Biological Process response to virus Source:ProtInc1 Publication

Cellular Location

Cytoplasm
Nucleus
Nucleus speckle
Nucleus, Cajal body
Localizes predominantly to the nucleus, found in cytoplasm to some extent. Forms distinct nuclear bodies that undergo dynamic changes during cell cycle progression. Nuclear bodies start to form in the early G0/G1 phase but become speckle-like in the S-phase and completely dispersed in mitosis. 35% of TRIM22 nuclear bodies overlap or are found adjacent to Cajal bodies.

PTM

Auto-ubiquitinated.