pH-Dependent absorption spectrum of a protein: a minimal electrostatic model of Anabaena sensory rhodopsin.
pH-Dependent absorption spectrum of a protein: a minimal electrostatic model of Anabaena sensory rhodopsin.
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蛋白质的 pH 依赖性吸收光谱:鱼腥藻感觉视紫红质的最小静电模型
DOI:
10.1039/c7cp00991g
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Ledentu
中科院分区:
文献类型:
--
作者:
Stenrup;Ledentu
A minimal electrostatic model is introduced which aims at reproducing and analyzing the visible-light absorption energy shift of a protein with pH. It relies on the existence of a protein structure, the prediction of titratable amino-acid pKa values and a very limited set of parameters. Applied to the case of the photochromic Anabaena sensory rhodopsin protein, the model succeeds in reproducing qualitatively the reported experimental data, confirming the importance of aspartic acid 217 in the observed blue shift in the λmax of ASR at neutral pH. It also suggests for the first time the role of two other amino acids, glutamic acid 36 at basic pH and aspartic acid 120 at acidic pH.
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