IUBMB Enzyme Nomenclature


Accepted name: [β-tubulin]-L-lysine N-acetyltransferase

Reaction: acetyl-CoA + a [β-tubulin]-L-lysine = CoA + a [β-tubulin]-N6-acetyl-L-lysine

Other name(s): San; NatE; NAA50 (gene name)

Systematic name: acetyl-CoA:[β-tubulin]-L-lysine N6-acetyltransferase

Comments: The enzyme acetylates L-lysine at position 252 of β-tubulin, which is located at the interface of α/β-tubulin heterodimers and interacts with the phosphate group of the α-tubulin-bound GTP. The acetylation is thought to attenuate tubulin incorporation into microtubules. The enzyme catalysing this activity (NAA50) also catalyses the acetylation of certain N-terminal methionyl residues. That activity is classified as EC, N-terminal methionine Nα-acetyltransferase NatE. cf. EC, α-tubulin N-acetyltransferase.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:


1. Chu, C.W., Hou, F., Zhang, J., Phu, L., Loktev, A.V., Kirkpatrick, D.S., Jackson, P.K., Zhao, Y. and Zou, H. A novel acetylation of β-tubulin by San modulates microtubule polymerization via down-regulating tubulin incorporation. Mol. Biol. Cell 22 (2011) 448-456. [PMID: 21177827]

[EC created 2022]

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