Mechanisms of S-nitrosothiol formation and selectivity in nitric oxide signaling.

Mechanisms of S-nitrosothiol formation and selectivity in nitric oxide signaling.
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DOI:
10.1016/j.cbpa.2012.10.016
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发表时间:
2012-12
影响因子:
7.8
通讯作者:
Marletta, Michael A.
Marletta, Michael A.
中科院分区:
生物学2区
文献类型:
--
作者:
Smith, Brian C.;Marletta, Michael A.

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虽然它被广泛接受,S-亚硝化发生在体内,问题仍然是关于S-亚硝化作为一种信号机制。S-亚硝化的化学反应包括NO氧化为N2 O3,然后与硫醇盐反应,NO和硫基自由基的自由基重组,以及过渡金属催化的途径。一旦形成,亚硝基硫醇可以通过转亚硝化反应在小分子或蛋白质硫醇之间转移。导致仅一部分细胞半胱氨酸的选择性S-亚硝化的途径在很大程度上仍然未知。选择性可以通过与NOS同种型共定位、蛋白质-蛋白质相互作用驱动的转亚硝化反应、S-亚硝基谷胱甘肽水平的调节或蛋白质亚硝基硫醇的定向脱亚硝化来赋予。
Although it is widely accepted that S-nitrosation occurs in vivo, questions remain regarding S-nitrosation as a signaling mechanism. The chemistry of S-nitrosation includes NO oxidation to N2O3 followed by reaction with thiolates, radical recombination of NO and thiyl radicals, and transition metal catalyzed pathways. Once formed, nitrosothiols can be transferred between small molecule or protein thiols through transnitrosation reactions. The pathways that lead to selective S-nitrosation of only a subset of cellular cysteines remain largely unknown. Selectivity may be conferred through colocalization with NOS isoforms, protein-protein interaction driven transnitrosation reactions, regulation of S-nitrosoglutathione levels, or directed denitrosation of protein nitrosothiols.
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