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Title

Structure of xylanase Xys1Δ from Streptomyces halstedii

AuthorsCanals, Albert ; Vega, María Cristina ; Gomis-Rüth, F. Xavier ; Gomis-Rüth, F. Xavier ; Díaz, Margarita ; Santamaría, Ramón I. ; Coll, Miquel
KeywordsXys1 protein, Streptomyces halstedii
xylan 1,4 beta xylosidase
bacterial protein
Streptomyces lividans
Streptomyces halstedii
Streptomyces
Bacteria (microorganisms)
Issue Date1-Aug-2003
PublisherInternational Union of Crystallography
CitationActa Crystallographica Section D: Biological Crystallography 59(8): 1447-1453 (2003)
AbstractXylanases hydrolyze the β-1,4-linked xylose backbone of xylans. They are of increasing interest in the paper and food industries for their pre-bleaching and bio-pulping applications. Such industries demand new xylanases to cover a wider range of cleavage specificity, activity and stability. The catalytic domain of xylanase Xys1 from Streptomyces halstedii JM8 was expressed, purified and crystallized and native data were collected to 1.78 Å resolution with an Rmerge of 4.4%. The crystals belong to space group P212121, with unit-cell parameters a = 34.05, b = 79.60, c = 87.80 Å. The structure was solved by the molecular-replacement method using the structure of the homologue Xyl10A from Streptomyces lividans. In a similar manner to other members of its family, Xys1 folds to form a standard (β/α)8 barrel with the two catalytic functions, the acid/base and the nucleophile, at its C-terminal side. The overall structure is described and compared with those of related xylanases.
Publisher version (URL)http://dx.doi.org/10.1107/S0907444903012629
URIhttp://hdl.handle.net/10261/104687
DOI10.1107/S0907444903012629
Identifiersdoi: 10.1107/S0907444903012629
issn: 0907-4449
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