کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7841940 | 1506504 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure and slow dynamics of protein hydration water
ترجمه فارسی عنوان
ساختار و پویایی آهسته آب هیدراته پروتئین
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کلمات کلیدی
آب هیدراتاسیون، هپینگ، پروتئین، ساختار، پیوند های هیدروژنی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
We report results on the structure, local order and dynamics of water surrounding a lysozyme protein. The local order of water molecules is as much tetrahedral as in bulk water already at close vicinity of the protein but the number of hydrogen bonds depends more on the distance from the protein and gradually recovers bulk value upon moving outer. The dynamics of water seems in general to be more affected than its structure by the presence of the protein. An extremely long-relaxation detected in hydration water appears in the first monolayer around the protein, and the slow down is enhanced at low temperature. The dynamics of water within a layer of thickness 6â¯Ã
is sub-diffusive up to about â¼1â¯ns, above 1â¯ns we observe a crossover toward a hopping regime over a length-scale larger than that of nearest neighbors molecules. This hopping seems connected to transient trapping of water molecules on some specific protein domains.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 268, 15 October 2018, Pages 903-910
Journal: Journal of Molecular Liquids - Volume 268, 15 October 2018, Pages 903-910
نویسندگان
Gaia Camisasca, Antonio Iorio, Margherita De Marzio, Paola Gallo,