Hydrogen sulfide as a gasotransmitter
Article first published online: 12 JAN 2010
© 2010 The Authors. Journal Compilation © 2010 International Society for Neurochemistry
Journal of Neurochemistry
Volume 113, Issue 1, pages 14–26, April 2010
How to Cite
Gadalla, M. M. and Snyder, S. H. (2010), Hydrogen sulfide as a gasotransmitter. Journal of Neurochemistry, 113: 14–26. doi: 10.1111/j.1471-4159.2010.06580.x
- Issue published online: 3 MAR 2010
- Article first published online: 12 JAN 2010
- Received October 6, 2009; revised manuscript received December 30, 2009; accepted January 6, 2010.
- cystathionine β-synthase;
- cystathionine γ-lyase;
- hydrogen sulfide;
J. Neurochem. (2010) 10.1111/j.1471-4159.2010.06580.x
Nitric oxide (NO) and carbon monoxide (CO) are well established as messenger molecules throughout the body, gasotransmitters, based on striking alterations in mice lacking the appropriate biosynthetic enzymes. Hydrogen sulfide (H2S) is even more chemically reactive, but until recently there was little definitive evidence for its physiologic formation. Cystathionine β-synthase (EC 126.96.36.199), and cystathionine γ-lyase (CSE; EC 188.8.131.52), also known as cystathionine, can generate H2S from cyst(e)ine. Very recent studies with mice lacking these enzymes have established that CSE is responsible for H2S formation in the periphery, while in the brain cystathionine β-synthase is the biosynthetic enzyme. Endothelial-derived relaxing factor activity is reduced 80% in the mesenteric artery of mice with deletion of CSE, establishing H2S as a major physiologic endothelial-derived relaxing factor. H2S appears to signal predominantly by S-sulfhydrating cysteines in its target proteins, analogous to S-nitrosylation by NO. Whereas S-nitrosylation typically inhibits enzymes, S-sulfhydration activates them. S-nitrosylation basally affects 1–2% of its target proteins, while 10–25% of H2S target proteins are S-sulfhydrated. In summary, H2S appears to be a physiologic gasotransmitter of comparable importance to NO and carbon monoxide.