biostudies-literatureUnknown2014Ponnan POur laboratory is credited for the discovery of enzymatic acetylation of protein, a phenomenon unknown till we identified an enzyme termed acetoxy drug: protein transacetylase (TAase), catalyzing the transfer of acetyl group from polyphenolic acetates to receptor proteins (RP). Later, TAase was identified as calreticulin (CR), an endoplasmic reticulum luminal protein. CR was termed calreticulin transacetylase (CRTAase). Our persistent study revealed that CR like other families of histone acetyltransferases (HATs) such as p300, Rtt109, PCAF, and ESA1, undergoes autoacetylation. The autoacetylated CR was characterized as a stable intermediate in CRTAase catalyzed protein acetylation, and similar was the case with ESA1. The autoacetylation of CR like that of HATs was found to enhance protein-TheScientificWorldJournal578956https://www.ebi.ac.uk/biostudies/studies/S-EPMC3932232biostudies-literatureComparison of protein acetyltransferase action of CRTAase with the prototypes of HAT.PMC3932232Raj HGRastogi RCPrasad AKParmar VSSingh PSaso LGaspari MKumar AJoshi RPonnan PGupta PfalseComparison of protein acetyltransferase action of CRTAase with the prototypes of HAT.Our laboratory is credited for the discovery of enzymatic acetylation of protein, a phenomenon unknown till we identified an enzyme termed acetoxy drug: protein transacetylase (TAase), catalyzing the transfer of acetyl group from polyphenolic acetates to receptor proteins (RP). Later, TAase was identified as calreticulin (CR), an endoplasmic reticulum luminal protein. CR was termed calreticulin transacetylase (CRTAase). Our persistent study revealed that CR like other families of histone acetyltransferases (HATs) such as p300, Rtt109, PCAF, and ESA1, undergoes autoacetylation. The autoacetylated CR was characterized as a stable intermediate in CRTAase catalyzed protein acetylation, and similar was the case with ESA1. The autoacetylation of CR like that of HATs was found to enhance protein-2014-01-01T00:00:00Z20142025-04-19T07:39:05.557Z2019-03-27T01:22:15ZS-EPMC39322322468840810.1155/2014/578956