Molecular mechanism of N-terminal acetylation by the ternary NatC complex.
Molecular mechanism of N-terminal acetylation by the ternary NatC complex.
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三元NatC复合物N-末端乙酰化的分子机制。
DOI:
10.1016/j.str.2021.05.003
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发表时间:
2021-10-07
期刊:
影响因子:
--
通讯作者:
Marmorstein R
中科院分区:
文献类型:
--
作者:
Deng S;Gottlieb L;Pan B;Supplee J;Wei X;Petersson EJ;Marmorstein R
Protein N-terminal acetylation is predominantly a ribosome-associated modification, with NatA-E serving as the major enzymes. NatC is the most unusual of these enzymes, containing one Naa30 catalytic subunit and two auxiliary subunits, Naa35 and Naa38; and substrate selectivity profile that overlaps with NatE. Here, we report the Cryo-EM structure of S. pombe NatC with a NatE/C-type bisubstrate analogue and inositol hexaphosphate (IP6), and associated biochemistry studies. We find that the presence of three subunits is a prerequisite for normal NatC acetylation activity in yeast and that IP6 binds tightly to NatC to stabilize the complex. We also describe the molecular basis for IP6-mediated NatC complex stabilization and the overlapping yet distinct substrate profiles of NatC and NatE. NatC is an unusual member of protein N-terminal acetyltransferases in requiring a small Naa38 subunit for activity. Deng et al. finds that Naa38 is required for normal NatC acetylation, Inositol hexaphosphate binding contributes to yeast NatC complex stability and NatC adopts a unique NAT architecture with a distinct substrate profile.
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影响因子:
5.7
作者:
Gottlieb, Leah;Marmorstein, Ronen
通讯作者:
Marmorstein, Ronen
影响因子:
16.8
作者:
Liszczak G;Goldberg JM;Foyn H;Petersson EJ;Arnesen T;Marmorstein R
通讯作者:
Marmorstein R
影响因子:
3.5
作者:
Dörfel MJ;Lyon GJ
通讯作者:
Lyon GJ
影响因子:
9.8
作者:
Arnesen T
通讯作者:
Arnesen T
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K