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Publication Abstract from PubMed

Lysine acetylation has been discovered in thousands of non-histone human proteins, including most metabolic enzymes. Deciphering the functions of acetylation is key to understanding how metabolic cues mediate metabolic enzyme regulation and cellular signaling. Glucose-6-phosphate dehydrogenase (G6PD), the rate-limiting enzyme in the pentose phosphate pathway, is acetylated on multiple lysine residues. Using site-specifically acetylated G6PD, we show that acetylation can activate (AcK89) and inhibit (AcK403) G6PD. Acetylation-dependent inactivation is explained by structural studies showing distortion of the dimeric structure and active site of G6PD. We provide evidence for acetylation-dependent K95/97 ubiquitylation of G6PD and Y503 phosphorylation, as well as interaction with p53 and induction of early apoptotic events. Notably, we found that the acetylation of a single lysine residue coordinates diverse acetylation-dependent processes. Our data provide an example of the complex roles of acetylation as a posttranslational modification that orchestrates the regulation of enzymatic activity, posttranslational modifications, and apoptotic signaling.

Acetylation-dependent coupling between G6PD activity and apoptotic signaling.,Wu F, Muskat NH, Dvilansky I, Koren O, Shahar A, Gazit R, Elia N, Arbely E Nat Commun. 2023 Oct 5;14(1):6208. doi: 10.1038/s41467-023-41895-2. PMID:37798264^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.