کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1365958 | 981577 | 2006 | 7 صفحه PDF | دانلود رایگان |
We have undertaken quantitative binding site studies in order to identify the binding site of the known microtubule destabilizing agents, the tubulyzines, in the tubulin dimer. Two different approaches were employed that utilized the tubulyzines and their derivatives. The first approach was based on a chemical affinity labeling method using tubulyzine affinity derivatives, and the second approach employed the mass spectrometric measurement of the differential reactivity of cysteines using the tubulyzines and monobromobimane. Based on overlapping data from these two approaches, we propose that the tubulyzines bind at the guanosine-5′-triphosphate binding site of β-tubulin. Interestingly, we also show that the tubulyzines’ binding to tubulin induces a conformational change in tubulin that prevents further interaction of the 239Cysβ with other reagents.
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Journal: Bioorganic & Medicinal Chemistry - Volume 14, Issue 4, 15 February 2006, Pages 1169–1175