کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10536976 | 962647 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical phosphorylation of histidine-containing peptides based on the sequence of histone H4 and their dephosphorylation by protein histidine phosphatase
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Chemical phosphorylation of histidine-containing peptides based on the sequence of histone H4 and their dephosphorylation by protein histidine phosphatase Chemical phosphorylation of histidine-containing peptides based on the sequence of histone H4 and their dephosphorylation by protein histidine phosphatase](/preview/png/10536976.png)
چکیده انگلیسی
Using peptides based on the amino acid sequences surrounding the two histidine residues in histone H4, we have investigated the kinetics of the phosphorylation and dephosphorylation reactions of their histidine residues, when reacted with potassium phosphoramidate, by 1H NMR. We have been able to estimate rate constants for the reactions and have shown that there are differences in the kinetics between the two peptides. The kinetics of hydrolysis of phosphoramidate was measured by 31P NMR and protein histidine phosphatase (PHP) was shown to catalyse the reaction. We have shown that the dephosphorylation of the phosphohistidine of the phosphopeptides is catalysed by PHP. In terms of substrate specificity, there is a small preference for 1-phosphohistidine compared to 3-phosphohistidine, although the rate accelerations for hydrolysis induced by the enzyme were 1100- and 33,333-fold, respectively. The kinetics of both the phosphorylation and dephosphorylation reactions depend on the amino acid sequence surrounding the histidine. PHP shows greater substrate specificity for the peptide whose sequence is similar to that around histidine 18 of histone H4. PHP was unable to catalyse the dephosphorylation of histone H4 that had been phosphorylated with a histone H4 histidine kinase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics - Volume 1804, Issue 1, January 2010, Pages 199-205
Journal: Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics - Volume 1804, Issue 1, January 2010, Pages 199-205
نویسندگان
Paul V. Attwood, Katrin Ludwig, Klaus Bergander, Paul G. Besant, Abdussalam Adina-Zada, Josef Krieglstein, Susanne Klumpp,