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相关概念视频

Channel Rhodopsins01:11

Channel Rhodopsins

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Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
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Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
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自动罗多普辛建模与多个质子化微状态.

Gustavo Cárdenas1, Vincent Ledentu1, Miquel Huix-Rotllant1

  • 1Aix-Marseille Univ, CNRS, ICR, 13013 Marseille, France.

The journal of physical chemistry. A
|October 25, 2023
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概括
此摘要是机器生成的。

增强的自动罗多素建模 (ARM) 协议现在包括最小静电模型 (MEM) 来模拟多个质子状态,改善不同pH值的罗多素吸收光谱精度.

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科学领域:

  • 生物物理学的生物物理.
  • 计算化学的计算化学
  • 频谱学是一种光谱学.

背景情况:

  • 自动Rhodopsin建模 (ARM) 协议使用QM/MM模型来模拟Rhodopsin电子吸收和排放.
  • 目前ARM的局限性包括每种罗多普辛模型只能建模一个单个质子化微态.

研究的目的:

  • 扩展ARM协议,以使用最小静电模型 (MEM) 结合多个质子微态.
  • 为了提高模拟罗多素吸收光谱在不同pH条件下的准确性.

主要方法:

  • 将最小静电模型 (MEM) 集成到现有的自动Rhodopsin建模 (ARM) 协议中.
  • 对玩具模型和 * Anabaena * 感官罗多素的pH 取决于吸收光谱的模拟.

主要成果:

  • 新的ARM+MEM协议成功地在给定的pH值上考虑了相关的质子化微态.
  • 模拟表明,单微态模型在某些pH值下是不够的.
  • 通过考虑关键残留量定位,ARM+MEM提供了对*Anabaena*感觉罗多素吸收谱的改进描述.

结论:

  • ARM+MEM协议提供了一种更全面的方法来建模罗多素的光谱特性.
  • 对质子化微态的计算对于准确预测罗多普辛的pH依赖的光谱行为至关重要.