کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1952578 1057215 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural insights into the acidophilic pH adaptation of a novel endo-1,4-β-xylanase from Scytalidium acidophilum
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Structural insights into the acidophilic pH adaptation of a novel endo-1,4-β-xylanase from Scytalidium acidophilum
چکیده انگلیسی
In this study, the crystal structure of a novel endo-1,4-β-xylanase from Scytalidium acidophilum, XYL1, was solved at 1.9 Å resolution. This is one of the few solved crystal structures of acidophilic proteins. The enzyme has the overall fold typical to family 11 xylanases. Comparison of this structure with other homologous acidophilic, neutrophilic and alkalophilic xylanases provides additional insights into the general features involved in low pH adaptation (stability and activity). Several sequence and structure modifications appeared to be responsible for the acidophilic characteristic: (a) the presence of an aspartic acid H bonded to the acid/base catalyst (b) the nature of specifically conserved residues in the active site (c) the negative potential at the surface (d) the decreased number of salt bridges and H bonds in comparison with highly alkaline enzymes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimie - Volume 92, Issue 10, October 2010, Pages 1407-1415
نویسندگان
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