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EC 2.3.1.256 Details
EC number
2.3.1.256
Accepted name
N-terminal methionine Nα-acetyltransferase NatC
Reaction
(1) acetyl-CoA + an N-terminal-L-methionyl-L-leucyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-leucyl-[protein] + CoA;;(2) acetyl-CoA + an N-terminal-L-methionyl-L-isoleucyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-isoleucyl-[protein] + CoA;;(3) acetyl-CoA + an N-terminal-L-methionyl-L-phenylalanyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-phenylalanyl-[protein] + CoA;;(4) acetyl-CoA + an N-terminal-L-methionyl-L-tryptophyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-tryptophyl-[protein] + CoA;;(5) acetyl-CoA + an N-terminal-L-methionyl-L-tyrosyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-tyrosyl-[protein] + CoA
Other name(s)
NAA30 (gene name), NAA35 (gene name), NAA38 (gene name), MAK3 (gene name), MAK10 (gene name), MAK31 (gene name)
Systematic name
acetyl-CoA:N-terminal-Met-Leu/Ile/Phe/Trp/Tyr-[protein] Met Nα-acetyltransferase
Comment
N-terminal-acetylases (NATs) catalyse the covalent attachment of an acetyl moiety from acetyl-CoA to the free α-amino group at the N-terminus of a protein. This irreversible modification neutralizes the positive charge at the N-terminus and makes the N-terminal residue larger and more hydrophobic, and may also play a role in membrane targeting and gene silencing. The NatC complex is found in all eukaryotic organisms, and specifically targets N-terminal L-methionine residues attached to bulky hydrophobic residues at the second position, including Leu, Ile, Phe, Trp, and Tyr residues.
History
created 1989 as EC 2.3.1.88, part transferred 2016 to EC 2.3.1.256
EC Tree
2.3.1.55 created 1976, deleted 1999
2.3.1.120 created 1990, deleted 1992
2.3.1.124 created 1990, deleted 1992