Ra. Bradshaw et al., N-TERMINAL PROCESSING - THE METHIONINE AMINOPEPTIDASE AND N-ALPHA-ACETYL TRANSFERASE FAMILIES, Trends in biochemical sciences, 23(7), 1998, pp. 263-267
Removal of the initiator methionine and/or acetylation of the alpha-am
ino group are among the earliest possible chemical modifications that
occur during protein synthesis in eukaryotes. These events are catalyz
ed by methionine aminopeptidase and N-alpha-acetyltransferase respecti
vely. Recent advances in the isolation and characterization of these e
nzymes indicate that they exist as isoforms that vary in cellullar loc
ation, function, and evolutionary origins.