6zj6

Structure of the GH99 endo-alpha-mannanase from Bacteroides xylanisolvens in complex with cyclohexylmethyl-Glc-1,3-isofagomine

spinqualitylabelsall models 6zj6, resolution 1.09Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6zj6 is a 1 chain structure with sequence from Bacteroides xylanisolvens XB1A. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.09Å Ligands: ACT, EDO, GLC, IFM, QTE Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function D6D1V7_9BACE Publication Abstract from PubMed Mammalian protein N-linked glycosylation is critical for glycoprotein folding, quality control, trafficking, recognition, and function. N-linked glycans are synthesized from Glc3Man9GlcNAc2 precursors that are trimmed and modified in the endoplasmic reticulum (ER) and Golgi apparatus by glycoside hydrolases and glycosyltransferases. Endo-alpha-1,2-mannosidase (MANEA) is the sole endo-acting glycoside hydrolase involved in N-glycan trimming and is located within the Golgi, where it allows ER-escaped glycoproteins to bypass the classical N-glycosylation trimming pathway involving ER glucosidases I and II. There is considerable interest in the use of small molecules that disrupt N-linked glycosylation as therapeutic agents for diseases such as cancer and viral infection. Here we report the structure of the catalytic domain of human MANEA and complexes with substrate-derived inhibitors, which provide insight into dynamic loop movements that occur on substrate binding. We reveal structural features of the human enzyme that explain its substrate preference and the mechanistic basis for catalysis. These structures have inspired the development of new inhibitors that disrupt host protein N-glycan processing of viral glycans and reduce the infectivity of bovine viral diarrhea and dengue viruses in cellular models. These results may contribute to efforts aimed at developing broad-spectrum antiviral agents and help provide a more in-depth understanding of the biology of mammalian glycosylation. Structure of human endo-alpha-1,2-mannosidase (MANEA), an antiviral host-glycosylation target.,Sobala LF, Fernandes PZ, Hakki Z, Thompson AJ, Howe JD, Hill M, Zitzmann N, Davies S, Stamataki Z, Butters TD, Alonzi DS, Williams SJ, Davies GJ Proc Natl Acad Sci U S A. 2020 Nov 5. pii: 2013620117. doi:, 10.1073/pnas.2013620117. PMID:33154157 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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