National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35 GM118090
米国
引用
ジャーナル: Elife / 年: 2020 タイトル: Molecular basis for N-terminal alpha-synuclein acetylation by human NatB. 著者: Sunbin Deng / Buyan Pan / Leah Gottlieb / E James Petersson / Ronen Marmorstein / 要旨: NatB is one of three major N-terminal acetyltransferase (NAT) complexes (NatA-NatC), which co-translationally acetylate the N-termini of eukaryotic proteins. Its substrates account for about 21% of ...NatB is one of three major N-terminal acetyltransferase (NAT) complexes (NatA-NatC), which co-translationally acetylate the N-termini of eukaryotic proteins. Its substrates account for about 21% of the human proteome, including well known proteins such as actin, tropomyosin, CDK2, and α-synuclein (αSyn). Human NatB (hNatB) mediated N-terminal acetylation of αSyn has been demonstrated to play key roles in the pathogenesis of Parkinson's disease and as a potential therapeutic target for hepatocellular carcinoma. Here we report the cryo-EM structure of hNatB bound to a CoA-αSyn conjugate, together with structure-guided analysis of mutational effects on catalysis. This analysis reveals functionally important differences with human NatA and NatB, resolves key hNatB protein determinants for αSyn N-terminal acetylation, and identifies important residues for substrate-specific recognition and acetylation by NatB enzymes. These studies have implications for developing small molecule NatB probes and for understanding the mode of substrate selection by NAT enzymes.
EMPIAR-10477 (タイトル: Cryo-EM structure of Human NatB with an Alpha-Synuclein peptide and CoA conjugate Data size: 2.0 TB Data #1: unaligned raw movies of hNatB with an Alpha-Synuclein peptide and CoA conjugate [micrographs - multiframe])
N-alpha-acetyltransferase25, NatBauxiliarysubunit / Mitochondrial distribution and morphology protein 20 / N-terminal acetyltransferase B complex ...Mitochondrial distribution and morphology protein 20 / N-terminal acetyltransferase B complex subunit MDM20 / NatB complex subunit MDM20 / N-terminal acetyltransferase B complex subunit NAA25 / p120