Structures of human O-GlcNAcase and its complexes reveal a new substrate recognition mode.
Structures of human O-GlcNAcase and its complexes reveal a new substrate recognition mode.
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DOI:
10.1038/nsmb.3390
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发表时间:
2017-04
影响因子:
16.8
通讯作者:
Jiang J
中科院分区:
文献类型:
--
作者:
Li B;Li H;Lu L;Jiang J
Human O-GlcNAcase (hOGA) is the unique enzyme responsible for the hydrolysis of the O-linked β-N-acetyl glucosamine (O-GlcNAc) modification, an essential protein glycosylation event that modulates the function of numerous cellular proteins in response to nutrients and stress. Here we report crystal structures of a truncated hOGA, which comprises the catalytic and stalk domains, in apo form, in complex with an inhibitor, and in complex with a glycopeptide substrate. We found that hOGA forms an unusual arm-in-arm homodimer in which the catalytic domain of one monomer is covered by the stalk domain of the sister monomer to create a substrate-binding cleft. Notably, the residues on the cleft surface afford extensive interactions with the peptide substrate in a recognition mode that is distinct from that of its bacterial homologs. These structures represent the first model of eukaryotic enzymes in the glycoside hydrolase 84 (GH84) family and provide a crucial starting point for understanding the substrate specificity of hOGA, which regulates a broad range of biological and pathological processes.
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DOI:
10.1083/jcb.201501101
发表时间:
2015-03-30
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bond MR;Hanover JA
通讯作者:
Hanover JA
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:
4
作者:
Keembiyehetty, Chithra N.;Krzeslak, Anna;Hanover, John A.
通讯作者:
Hanover, John A.
影响因子:
16.8
作者:
Dennis, RJ;Taylor, EJ;Davies, GJ
通讯作者:
Davies, GJ
DOI:
10.1126/science.1243990
发表时间:
2013-12-06
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Lazarus MB;Jiang J;Kapuria V;Bhuiyan T;Janetzko J;Zandberg WF;Vocadlo DJ;Herr W;Walker S
通讯作者:
Walker S