Synergy of peptide and sugar in O-GlcNAcase substrate recognition.
Synergy of peptide and sugar in O-GlcNAcase substrate recognition.
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DOI:
10.1016/j.chembiol.2012.01.011
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发表时间:
2012-02-24
影响因子:
--
通讯作者:
van Aalten DM
中科院分区:
文献类型:
--
作者:
Schimpl M;Borodkin VS;Gray LJ;van Aalten DM
Protein O-GlcNAcylation is an essential reversible posttranslational modification in higher eukaryotes. O-GlcNAc addition and removal is catalyzed by O-GlcNAc transferase and O-GlcNAcase, respectively. We report the molecular details of the interaction of a bacterial O-GlcNAcase homolog with three different synthetic glycopeptides derived from characterized O-GlcNAc sites in the human proteome. Strikingly, the peptides bind a conserved O-GlcNAcase substrate binding groove with similar orientation and conformation. In addition to extensive contacts with the sugar, O-GlcNAcase recognizes the peptide backbone through hydrophobic interactions and intramolecular hydrogen bonds, while avoiding interactions with the glycopeptide side chains. These findings elucidate the molecular basis of O-GlcNAcase substrate specificity, explaining how a single enzyme achieves cycling of the complete O-GlcNAc proteome. In addition, this work will aid development of O-GlcNAcase inhibitors that target the peptide binding site. ► Multiple O-GlcNAc peptides bind OGA with similar orientation and conformations ► OGA interacts with the peptide backbone of substrates, not with side chains ► Intramolecular hydrogen bonds affect substrate conformation and Km of glycopeptides ► Different OGA inhibitors display varying levels of peptide mimicry
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影响因子:
56.9
作者:
CHO, YJ;GORINA, S;PAVLETICH, NP
通讯作者:
PAVLETICH, NP
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
影响因子:
16.8
作者:
Dennis, RJ;Taylor, EJ;Davies, GJ
通讯作者:
Davies, GJ
DOI:
10.1042/bj20101338
发表时间:
2010-11-15
期刊:
The Biochemical journal
影响因子:
--
作者:
Schimpl M;Schüttelkopf AW;Borodkin VS;van Aalten DM
通讯作者:
van Aalten DM
影响因子:
4.3
作者:
Lazarus, BD;Love, DC;Hanover, JA
通讯作者:
Hanover, JA