5wv8

Crystal structure of a mutant insect group III chitinase (CAD1-E217L) from Ostrinia furnacalis

spinqualitylabelsall models 5wv8, resolution 2.04Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5wv8 is a 1 chain structure with sequence from Ostrinia furnacalis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.042Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function U5LUV7_OSTFU Publication Abstract from PubMed The glycoside hydrolase family 18 chitinases degrade or alter chitin. Multiple catalytic domains in a glycoside hydrolase family 18 chitinase function synergistically during chitin degradation. Here, an insect group III chitinase from the agricultural pest Ostrinia furnacalis (OfChtIII) is revealed to be an arthropod-conserved chitinase that contains two nonsynergistic GH18 domains according to its catalytic properties. Both GH18 domains are active towards single-chained chitin substrates, but are inactive towards insoluble chitin substrates. The crystal structures of each unbound GH18 domain, as well as of GH18 domains complexed with hexa-N-acetyl-chitohexaose or penta-N-acetyl-chitopentaose, suggest that the two GH18 domains possess endo-specific activities. Physiological data indicated that the developmental stage-dependent gene-expression pattern of OfChtIII was the same as that of the chitin synthase OfChsA but significantly different from that of the chitinase OfChtI, which is indispensable for cuticular chitin degradation. Additionally, immunological staining indicated that OfChtIII was co-localized with OfChsA. Thus, OfChtIII is most likely to be involved in the chitin-synthesis pathway. The deduced role of a chitinase containing two nonsynergistic catalytic domains.,Liu T, Zhu W, Wang J, Zhou Y, Duan Y, Qu M, Yang Q Acta Crystallogr D Struct Biol. 2018 Jan 1;74(Pt 1):30-40. doi:, 10.1107/S2059798317018289. Epub 2018 Jan 1. PMID:29372897 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Chitinase 3D structures

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