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Your query returned 1 entry. 
Printable version
| EC | 2.3.1.258 | ||||||||
| Accepted name: | N-terminal methionine Nα-acetyltransferase NatE | ||||||||
| Reaction: | (1) acetyl-CoA + an N-terminal-L-methionyl-L-alanyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-alanyl-[protein] + CoA (2) acetyl-CoA + an N-terminal-L-methionyl-L-seryl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-seryl-[protein] + CoA (3) acetyl-CoA + an N-terminal-L-methionyl-L-valyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-valyl-[protein] + CoA (4) acetyl-CoA + an N-terminal-L-methionyl-L-threonyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-threonyl-[protein] + CoA (5) acetyl-CoA + an N-terminal-L-methionyl-L-lysyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-lysyl-[protein] + CoA (6) acetyl-CoA + an N-terminal-L-methionyl-L-leucyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-leucyl-[protein] + CoA (7) acetyl-CoA + an N-terminal-L-methionyl-L-phenylalanyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-phenylalanyl-[protein] + CoA (8) acetyl-CoA + an N-terminal-L-methionyl-L-tyrosyl-[protein] = an N-terminal-Nα-acetyl-L-methionyl-L-tyrosyl-[protein] + CoA |
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| Other name(s): | NAA50 (gene name); NAT5; SAN | ||||||||
| Systematic name: | acetyl-CoA:N-terminal-Met-Ala/Ser/Val/Thr/Lys/Leu/Phe/Tyr-[protein] Met-Nα-acetyltransferase | ||||||||
| Comments: | 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. It may also play a role in membrane targeting and gene silencing. NatE is found in all eukaryotic organisms and plays an important role in chromosome resolution and segregation. It specifically targets N-terminal L-methionine residues attached to Lys, Val, Ala, Tyr, Phe, Leu, Ser, and Thr. There is some substrate overlap with EC 2.3.1.256, N-terminal methionine Nα-acetyltransferase NatC. In addition, the acetylation of Met followed by small residues such as Ser, Thr, Ala, or Val suggests a kinetic competition between NatE and EC 3.4.11.18, methionyl aminopeptidase. The enzyme also has the activity of EC 2.3.1.48, histone acetyltransferase, and autoacetylates several of its own lysine residues. | ||||||||
| Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc, PDB | ||||||||
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