کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10536933 | 962640 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Addition of negatively charged residues can reverse the decrease in the solubility of an acidic protein caused by an artificially introduced non-polar surface patch
ترجمه فارسی عنوان
اضافه کردن باقی مانده های منفی باقیمانده می تواند کاهش حلالیت پروتئین اسیدی ناشی از یک پچ سطح غیر قطبی مصنوعی
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کلمات کلیدی
تجمع، باز کردن طراحی پروتئین، پروتئین تعامل پروتئین، انفجار الکترواستاتیک،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
A non-polar patch on the surface of a protein can cause a reduction in the solubility and stability of the protein, and thereby induce aggregation. However, a non-polar patch may be required so that the protein can bind to another molecule. The mutant 6L-derived from the acidic, dimeric α-helical protein sulerythrin and containing six additional leucines arranged to form a non-polar patch on its surface when properly folded-has a substantially reduced solubility in comparison with that of wild-type sulerythrin. This reduced solubility appears to cause 6L to aggregate. To reverse this aggregation, we mutated 6L so that it contained three to six additional glutamates or aspartates that we predicted would surround the non-polar leucine patch on natively folded 6L. Although the introduction of three glutamates or aspartates increased solubility, the mutants still aggregate and have a reduced α-helical content. Conversely, mutants with six additional glutamates or aspartates appear to exist mostly as dimers and to have the same α-helical content as that of wild-type sulerythrin. Notably, the introduction of five lysines or five arginines at the positions held by the glutamates or aspartates did not recover solubility as effectively as did the negatively charged residues. These results demonstrate that negatively charged residues, but not positively charged ones, surrounding a non-polar patch on an acidic protein can completely reverse the decrease in its solubility caused by the patch of non-polar surface residues.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics - Volume 1844, Issue 3, March 2014, Pages 553-560
Journal: Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics - Volume 1844, Issue 3, March 2014, Pages 553-560
نویسندگان
Sota Yagi, Satoshi Akanuma, Akihiko Yamagishi,