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dc.contributor.authorJiraphorn Phanichen_US
dc.contributor.authorSiraphob Threeracheepen_US
dc.contributor.authorNawee Kungwanen_US
dc.contributor.authorThanyada Rungrotmongkolen_US
dc.contributor.authorSupot Hannongbuaen_US
dc.date.accessioned2018-12-14T03:48:20Z-
dc.date.available2018-12-14T03:48:20Z-
dc.date.issued2018-01-01en_US
dc.identifier.issn15380254en_US
dc.identifier.issn07391102en_US
dc.identifier.other2-s2.0-85057574035en_US
dc.identifier.other10.1080/07391102.2018.1514326en_US
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85057574035&origin=inwarden_US
dc.identifier.urihttp://cmuir.cmu.ac.th/jspui/handle/6653943832/62960-
dc.description.abstract© 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group. Two important glycoproteins on the influenza virus membrane, hemagglutinin (HA) and neuraminidase (NA), are relevant to virus replication. As previously reported, HA has a substrate specificity towards SIA-2,3-GAL-1,4-NAG (3SL) and SIA-2,6-GAL-1,4-NAG (6SL) glycans, while NA can cleave both types of linkages. However, the substrate binding into NA and its preference are not well understood. In this work, the glycan binding and specificity of human and avian NAs were evaluated by classical molecular dynamics (MD) simulations, whilst the conformational diversity of 3SL avian and 6SL human glycans in an unbound state was investigated by replica exchange MD simulations. The results indicated that the 3SL avian receptor fits well in the binding cavity of all NAs and does not require a conformational change for such binding compared to the flexible shape of the 6SL human receptor. From the QM/MM-GBSA binding free energy and decomposition free energy data, 6SL showed a much stronger binding towards human NAs (H1N1, H2N2 and H3N2) than to avian NAs (H5N1 and H7N9). This suggests that influenza NAs have a substrate specificity corresponding to their HA, indicating the functional balance between the two important glycoproteins. Both linkages show distinct glycan topologies when complexed with NAs, while the flexibility of torsion angles between GAL and NAG in 6SL results in the various shapes of glycan and different binding patterns. Lower conformational diversities of both glycans when bound to NA compared to the unbound state were found, and were required in order to be accommodated within the NA cavity. Communicated by Ramaswamy H. Sarma.en_US
dc.subjectBiochemistry, Genetics and Molecular Biologyen_US
dc.titleGlycan binding and specificity of viral influenza neuraminidases by classical molecular dynamics and replica exchange molecular dynamics simulationsen_US
dc.typeJournalen_US
article.title.sourcetitleJournal of Biomolecular Structure and Dynamicsen_US
article.stream.affiliationsChulalongkorn Universityen_US
article.stream.affiliationsChiang Mai Universityen_US
Appears in Collections:CMUL: Journal Articles

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