乳酸脱酶D是D-2-氧酸的一般脱酶,与D-乳酸酸性酸性相关
Shan Jin1, Xingchen Chen1, Jun Yang1
1State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 320 Yue-Yang Road, Shanghai, 200031, China.
哺乳动物乳酸脱酶D (LDHD) 突变导致D-乳酸酸性酸性. 这项研究揭示了mLDHDHD.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 酶学 是一种酶学.
背景情况:
- 哺乳动物乳酸脱酶D (LDHD) 对于D-乳酸盐代谢至关重要.
- 在LDHD的突变与D-乳酸酸性化有关,一种代谢障碍.
- 了解LDHD的功能对于解决相关病态至关重要.
研究的目的:
- 对小鼠LDHD (mLDHD) 进行全面的生化和结构分析.
- 阐明mLDHD基底特异性和催化活性背后的分子机制.
- 为了研究突变对LDHD功能和D-乳酸酸性酸性疾病发病的影响.
主要方法:
- 在纯化小鼠LDHD.HD上进行系统的生物化学测定.
- 确定各种复杂形式的mLDHD晶体结构 (FAD结合,FAD/Mn2+结合,基质/产品复合物).
- 对基质结合部位相互作用和催化活性的分析.
主要成果:
- mLDHD是一种依赖Mn2+的脱酶,对具有疏水性部分的D-2-氧酸具有特定活性.
- 该酶对L-异构体或具有水友性部分的D-2-氧酸没有活性.
- 结构数据揭示了基质结合部位的正电荷口袋和弹性疏水口袋,解释了基质特异性.
结论:
- 该研究提供了对mLDHD的基质特异性和催化机制的详细分子理解.
- 对基质结合部位的结构洞察力解释了mLDHD如何区分各种D-2-氧酸.
- 这项研究澄清了LDHD突变在D-乳酸性酸性发展中的功能性作用.
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