RIDA (reactive intermediate imine deaminase A) is an RNA-binding protein that functions as a critical regulator of mRNA stability and degradation. Primary Function: RIDA promotes endoribonucleolytic cleavage of specific mRNAs by facilitating recruitment of the ribonuclease P/MRP complex 1. Mechanism: RIDA recognizes N6-methyladenosine (m6A)-containing mRNAs with a 5'-GGUUC-3' motif and acts as a bridge between YTHDF2 and the ribonuclease P/MRP complex 1. This cooperative binding leads to targeted mRNA destabilization and degradation. Cellular Localization: RIDA localizes to multiple compartments including the nucleus, cytoplasm, mitochondria, and peroxisomes, consistent with its diverse regulatory roles 1. Beyond RNA catabolism, RIDA exhibits deaminase activity and participates in negative regulation of translation and L-threonine catabolism. Disease Relevance: While no specific disease associations are documented in the provided abstracts, RIDA's role in selective mRNA degradation suggests potential involvement in cellular homeostasis and gene expression control. Clinical Significance: The mRNA-selective function of RIDA positions it as a potential therapeutic target for conditions involving aberrant gene expression, though additional studies are needed to establish definitive clinical connections.