کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8384027 1543463 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and structure of the charge-transfer intermediate of the transmembrane redox catalyst DsbB
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
Preparation and structure of the charge-transfer intermediate of the transmembrane redox catalyst DsbB
چکیده انگلیسی
Disulfide bond formation is a critical step in the folding of many secretory proteins. In bacteria, disulfide bonds are introduced by the periplasmic dithiol oxidase DsbA, which transfers its catalytic disulfide bond to folding polypeptides. Reduced DsbA is reoxidized by ubiquinone Q8, catalyzed by inner membrane quinone reductase DsbB. Here, we report the preparation of a kinetically stable ternary complex between wild-type DsbB, containing all essential cysteines, Q8 and DsbA covalently bound to DsbB. The crystal structure of this trapped DsbB reaction intermediate exhibits a charge-transfer interaction between Q8 and the Cys44 in the DsbB reaction center providing experimental evidence for the mechanism of de novo disulfide bond generation in DsbB.Structured summaryMINT-6742336:dsbB (uniprotkb:P0A6M2) and dsbA (uniprotkb:P0AEG4) bind (MI:0407) biochemically (MI:0401)MINT-6742439:dsbA (uniprotkb:P0AEG4) and dsbB (uniprotkb:P0A6M2) colocalize (MI:0403) by molecular sieving (MI:0071)MINT-6742457:dsbB (uniprotkb:P0A6M2) and dsbA (uniprotkb:P0AEG4) bind (MI:0407) by mass spectrometry studies of complexes (MI:0069)MINT-6742466:dsbA (uniprotkb:P0AEG4) and dsbB (uniprotkb:P0A6M2) bind (MI:0407) by X-ray crystallography (MI:0114)
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: FEBS Letters - Volume 582, Issues 23–24, 15 October 2008, Pages 3301-3307
نویسندگان
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