铜(II) 与阿尔法-同核素结合,这是帕金森病的蛋白质
Jennifer C Lee1, Harry B Gray, Jay R Winkler
1Laboratory of Molecular Biophysics, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892-8013, USA. leej4@mail.nih.gov
Journal of the American Chemical Society
|May 10, 2008
概括
铜 (II) 离子紧紧地与α-synuclein结合,这是与帕金森病相关的蛋白质. 这种相互作用发生在蛋白质的N端附近,并且不涉及50位的histidine.
科学领域:
- 生物化学 生物化学
- 神经科学是一个神经科学.
- 蛋白质化学 蛋白质化学
背景情况:
- 阿尔法-同核素是一种与帕金森病相关的蛋白质.
- 了解蛋白质-金属相互作用对于神经退行性疾病研究至关重要.
研究的目的:
- 为了研究铜 (II) 和α-synuclein之间的相互作用.
- 为了确定铜与α-synuclein的结合点和亲和力.
主要方法:
- 测量了托芬光强度和衰变动力学.
- 位点定向的突变发生 (F4W和F4W/H50S突变).
主要成果:
- 铜 (II) 与α-synuclein相互作用,通过光变异得到证实.
- 在pH7下,Cu(II) (Kd = 100nM) 在N端附近的高亲和度结合.
- 位于50位的histidine不参与高亲和度铜结合部位.
结论:
- 铜 (II) 特别与N端附近的α-synuclein结合.
- 这种结合在50位是独立于histidine的.
- 这些发现有助于理解α-synuclein在帕金森病发病过程中的作用.
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