[球状蛋白质内部运动与温度和自旋晶格弛豫时间之间的关系]
[Internal movement within globular proteins in accordance with the relationship between temperature and spin-lattice relaxation time].
作者信息
Aksenov S I, Filatov A V
出版信息
Biofizika. 1979 Mar-Apr;24(2):324-5.
PMID:444614
Abstract
The minima on the temperature dependence of T1 for protein protons were observed in dried SA at temperature about -100 degrees C and also about 0 degree C in SA and RNAase solutions in D2O. The minima of the temperature dependence were ascribed to motions of methyl groups of proteins, in the first case, and to oscillation of the polypeptide chain in the second case, both at characteristic frequencies of 10(8) s-1 in the minimum points.
摘要
在干燥的SA中，当温度约为-100℃时，观察到蛋白质质子T1的温度依赖性最小值；在D2O中的SA和核糖核酸酶溶液中，当温度约为0℃时也观察到了该最小值。在第一种情况下，温度依赖性最小值归因于蛋白质甲基的运动；在第二种情况下，归因于多肽链的振荡，两种情况在最小值点处的特征频率均为10⁸ s⁻¹。
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