Sulfide Detoxification in Plant Mitochondria
Methods in Enzymology, ISSN: 0076-6879, Vol: 555, Page: 271-286
2015
- 11Citations
- 30Captures
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Metrics Details
- Citations11
- Citation Indexes11
- 11
- CrossRef1
- Captures30
- Readers30
- 30
Article Description
In contrast to animals, which release the signal molecule sulfide in small amounts from cysteine and its derivates, phototrophic eukaryotes generate sulfide as an essential intermediate of the sulfur assimilation pathway. Additionally, iron–sulfur cluster turnover and cyanide detoxification might contribute to the release of sulfide in mitochondria. However, sulfide is a potent inhibitor of cytochrome c oxidase in mitochondria. Thus, efficient sulfide detoxification mechanisms are required in mitochondria to ensure adequate energy production and consequently survival of the plant cell. Two enzymes have been recently described to catalyze sulfide detoxification in mitochondria of Arabidopsis thaliana, O -acetylserine(thiol)lyase C (OAS-TL C), and the sulfur dioxygenase (SDO) ethylmalonic encephalopathy protein 1 (ETHE1). Biochemical characterization of sulfide producing and consuming enzymes in mitochondria of plants is fundamental to understand the regulatory network that enables mitochondrial sulfide homeostasis under nonstressed and stressed conditions. In this chapter, we provide established protocols to determine the activity of the sulfide releasing enzyme β-cyanoalanine synthase as well as sulfide-consuming enzymes OAS-TL and SDO. Additionally, we describe a reliable and efficient method to purify OAS-TL proteins from plant material.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0076687914000925; http://dx.doi.org/10.1016/bs.mie.2014.11.027; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84929314698&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/25747485; https://linkinghub.elsevier.com/retrieve/pii/S0076687914000925; https://dx.doi.org/10.1016/bs.mie.2014.11.027
Elsevier BV
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