کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1936373 | 1050689 | 2007 | 5 صفحه PDF | دانلود رایگان |
WASP (Wiskott–Aldrich syndrome protein) has been proposed to adopt a closed conformation (autoinhibited conformation) due to interaction between the carboxy terminal and the GTPase binding domain. Various WASP-interacting proteins have been suggested to relieve this autoinhibition. We have used the split YFP (Yellow Fluorescent Protein) to analyze the conformation of WASP. Saccharomyces cerevisiae cells expressing YFP1–154-WASP-YFP155–238 were found to exhibit YFP fluorescence while cells expressing of YFP1–154-WASP and WASP-YFP155–238 did not suggesting an intramolecular complementation of the YFP molecule. The fluorescence signal of YFP1–154-WASP-YFP155–238 was enhanced in the presence of WIP (WASP-interacting protein) however this is not due to the increased stability of YFP1–154-WASP-YFP155–238. Expression of Toca-1 and Nck1 reduced the YFP fluorescence from YFP1–154-WASP-YFP155–238 even in the presence of WIP suggesting that binding of Toca-1 or Nck1 altered the conformation of YFP1–154-WASP-YFP155–238. Thus both Nck1 and Toca-1 can relieve the autoinhibition of the WASP molecule.
Journal: Biochemical and Biophysical Research Communications - Volume 362, Issue 4, 3 November 2007, Pages 1085–1089