首页> 美国卫生研究院文献>Plant Methods >Quantitation of glutathione S-transferases in rice (Oryza sativa L.) roots exposed to cadmium by liquid chromatography–tandem mass spectrometry using isotope-labeled wing peptides as an internal standard
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Quantitation of glutathione S-transferases in rice (Oryza sativa L.) roots exposed to cadmium by liquid chromatography–tandem mass spectrometry using isotope-labeled wing peptides as an internal standard

机译:液相色谱-串联质谱法使用同位素标记的翼状肽作为内标定量测定暴露于镉的水稻(Oryza sativa L.)根中的谷胱甘肽S-转移酶

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摘要

BackgroundPlant glutathione S-transferases (GSTs, EC 2.5.1.18) are multifunctional enzymes involved in heavy metal cellular detoxification by conjugating the tripeptide (g-Glu-Cys-Gly) glutathione to heavy metals. Previous studies demonstrated that individual rice GSTs were differentially induced by heavy metal exposure at the mRNA transcript level. However, little information is available concerning changes in protein concentration of rice GSTs under heavy metal stress. Because the correlation between changes in protein concentration and gene expression under abiotic stress is poor, direct determination of rice GSTs protein concentrations during cadmium (Cd) exposure is a more effective and reliable approach to explore possible mechanisms of rice Cd translocation and accumulation.
机译:背景植物谷胱甘肽S-转移酶(GSTs,EC 2.5.1.18)是通过将三肽(g-Glu-Cys-Gly)谷胱甘肽与重金属缀合而参与重金属细胞解毒的多功能酶。先前的研究表明,个别水稻GSTs在mRNA转录水平上受到重金属暴露的诱导。但是,有关重金属胁迫下水稻GSTs蛋白质浓度变化的信息很少。由于非生物胁迫下蛋白质浓度变化与基因表达之间的相关性较弱,因此直接测定水稻暴露于镉(Cd)过程中的GSTs蛋白质浓度是探索水稻Cd易位和积累机制的更有效和可靠的方法。

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