Role of electromechanical and mechanoelectric effects in protein hydration under hydrostatic pressure

被引：13

作者：

Danielewicz-Ferchmin, Irena ^{[2
]}

Banachowicz, Ewa M. ^{[2
]}

Ferchmin, A. Ryszard ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland

[2] Adam Mickiewicz Univ Poznan, Fac Phys, PL-61614 Poznan, Poland

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2011年 / 13卷 / 39期

关键词：

SCANNING PROBE MICROSCOPY; EGG-WHITE LYSOZYME; 10(8) V M(-1); ELECTRIC-FIELD; STATIC PERMITTIVITY; X-RAY; WATER; TEMPERATURE; SCATTERING; NANOSCALE;

D O I：

10.1039/c1cp21819k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Recent measurements of lysozyme hydration water density under non-denaturing pressure show that it is higher than that of bulk water in the same conditions. High protein hydration layer density has earlier been observed at ambient conditions and ascribed to electrostriction. We calculate the pressure-induced protein mean surface charge density increment Delta sigma. Within the hydration layer, the higher fields due to Delta sigma lead to an additional water compression via electrostriction. The increment Delta sigma is considered as due to a mechanoelectric effect in protein molecules. The mean value of the effective mechanoelectric coefficient d is calculated and compared with piezoelectric coefficients of amino acids and their compounds.

引用

页码：17722 / 17728

页数：7

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