ABCE1/ Rnase L Inhibitor Immunizing Blocking Peptide

The protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the OABP subfamily. Alternatively referred to as the RNase L inhibitor, this protein functions to block the activity of ribonuclease L. Activation of ribonuclease L leads to inhibition of protein synthesis in the 2-5A/RNase L system, the central pathway for viral interferon action. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]

ABCE1: Antagonizes the binding of 2-5A (5'-phosphorylated 2',5'-linked oligoadenylates) by RNase L through direct interaction with RNase L and therefore inhibits its endoribonuclease activity. May play a central role in the regulation of mRNA turnover. Antagonizes the anti-viral effect of the interferon-regulated 2-5A/RNase L pathway. May act as a chaperone for post-translational events during HIV-1 capsid assembly. Belongs to the ABC transporter superfamily. ABCE family.

Chromosomal Location of Human Ortholog: 4q31

Cellular Component: cytoplasm; membrane; mitochondrial matrix; mitochondrion

Molecular Function: ATP binding; ATPase activity; protein binding; ribonuclease inhibitor activity

Biological Process: negative regulation of catalytic activity; response to virus; RNA catabolic process; transmembrane transport; viral reproduction