期刊
TRAFFIC
卷 13, 期 1, 页码 19-24出版社
WILEY
DOI: 10.1111/j.1600-0854.2011.01269.x
关键词
ER-associated degradation; esterification; oxyester bond; thioester bond; ubiquitin; ubiquitination; ubiquitin conjugating enzyme; ubiquitin-dependent degradation; ubiquitin protein ligase
类别
资金
- NIH [AI019687]
Post-translational modification by ubiquitination determines intracellular location and fate of numerous proteins, thus impacting a diverse array of physiologic functions. Past dogma has been that ubiquitin was only coupled to substrates by isopeptide bonds to internal lysine residues or less frequently peptide bonds to the N-terminus. Enigmatically, however, several proteins lacking lysines had been reported to retain ubiquitin-dependent fates. Resolution of this paradox was afforded by recent observations that ubiquitination of substrates can also occur on cysteine or serine and threonine residues by thio- or oxy-ester bond formation, respectively (collectively called esterification). Although chemically possible, these bonds were considered too labile to be of physiological relevance. In this review we discuss recent evidence for the ubiquitination of protein substrates by esterification and speculate on its mechanism and its physiological importance.
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