This gene, through alternative splicing, encodes three different isoforms. Two of the protein isoforms encoded by this gene are specific inhibitors of type 1 serine/threonine protein phosphatases and can bind but not cleave RNA. The third protein isoform lacks the phosphatase inhibitory function but is a single-strand endoribonuclease comparable to RNase E of E. coli. This isoform requires magnesium for its function and cleaves specific sites in A+U-rich regions of RNA.
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Protein Aliases: Activator of RNA decay; ARD-1; NIPP-1; Nuclear inhibitor of protein phosphatase 1; nuclear inhibitor of protein phosphatase-1 alpha; nuclear inhibitor of protein phosphatase-1 beta; nuclear subunit of PP-1; Protein phosphatase 1 regulatory inhibitor subunit 8; protein phosphatase 1, regulatory (inhibitor) subunit 8; protein phosphatase 1, regulatory subunit 8; RNase E
Gene Aliases: 6330548N22Rik; ARD-1; ARD1; AU044684; NIPP-1; NIPP1; PPP1R8; PRO2047
Molecular Function: RNA splicing factor