Description
N-alpha-acetyltransferase that acetylates the N-terminus of proteins that retain their initiating methionine (By similarity). Has a broad substrate specificity: able to acetylate the initiator methionine of most peptides (By similarity). Also displays N-epsilon-acetyltransferase activity by mediating acetylation of the side chain of specific lysines on proteins. Autoacetylates (PubMed:14653991). Required for the establishment of sister chromatid cohesion and couple the processes of cohesion and DNA replication to ensure that only sister chromatids become paired together (PubMed:14653991, PubMed:18801358, PubMed:27996020). Required for the interaction between Scc1/vtd and SMC3, possibly by mediating N-terminal acetylation of Scc1/vtd (PubMed:27996020).
(Microbial infection) Required for optimal replication of E.chaffeensis in the immune tissues, hemocytes, and fat body.
Catalytic Activity
acetyl-CoA + N-terminal L-methionyl-L-alanyl-[protein] = CoA + H(+) + N-terminal N(alpha)-acetyl-L-methionyl-L-alanyl-[protein]
acetyl-CoA + N-terminal L-methionyl-L-seryl-[protein] = CoA + H(+) + N-terminal N(alpha)-acetyl-L-methionyl-L-seryl-[protein]
acetyl-CoA + N-terminal L-methionyl-L-valyl-[protein] = CoA + H(+) + N-terminal N(alpha)-acetyl-L-methionyl-L-valyl-[protein]
acetyl-CoA + N-terminal L-methionyl-L-threonyl-[protein] = CoA + H(+) + N-terminal N(alpha)-acetyl-L-methionyl-L-threonyl-[protein]
acetyl-CoA + N-terminal L-methionyl-L-lysyl-[protein] = CoA + H(+) + N-terminal N(alpha)-acetyl-L-methionyl-L-lysyl-[protein]
acetyl-CoA + N-terminal L-methionyl-L-leucyl-[protein] = CoA + H(+) + N-terminal N(alpha)-acetyl-L-methionyl-L-leucyl-[protein]
acetyl-CoA + N-terminal L-methionyl-L-phenylalanyl-[protein] = CoA + H(+) + N-terminal N(alpha)-acetyl-L-methionyl-L-phenylalanyl-[protein]
acetyl-CoA + N-terminal L-methionyl-L-tyrosyl-[protein] = CoA + H(+) + N-terminal N(alpha)-acetyl-L-methionyl-L-tyrosyl-[protein]
Subcellular location
Cytoplasm
During interphase, it localizes to the cytoplasm. During the entry into mitosis, it becomes distributed throughout the entire cell in a punctate pattern. From metaphase through telophase, it is distributed uniformly throughout the cell. With evidence from 3 publications.