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EC 2.3.1.259 Details
EC number
2.3.1.259
Accepted name
N-terminal methionine Nα-acetyltransferase NatF
Reaction
acetyl-CoA + an N-terminal-L-methionyl-[transmembrane protein] = an N-terminal-Nα-acetyl-L-methionyl-[transmembrane protein] + CoA
Other name(s)
NAA60 (gene name)
Systematic name
acetyl-CoA:N-terminal-Met-Lys/Ser/Val/Leu/Gln/Ile/Tyr/Thr-[transmembrane 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, makes the N-terminal residue larger and more hydrophobic, and prevents its removal by hydrolysis. NatF is found only in higher eukaryotes, and is absent from yeast. Unlike other Nat systems the enzyme is located in the Golgi apparatus. It faces the cytosolic side of intracellular membranes, and specifically acetylates transmembrane proteins whose N termini face the cytosol. NatF targets N-terminal L-methionine residues attached to Lys, Ser, Val, Leu, Gln, Ile, Tyr and Thr residues.
History
created 1989 as EC 2.3.1.88, part transferred 2016 to EC 2.3.1.259
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