S-sulfocysteine synthase function in sensing chloroplast redox status
2013
Gotor, Cecilia | Romero, Luis C.
3 Páginas, 1 figura
Show more [+] Less [-]The minor chloroplastic O-acetylserine(thiol)lyase isoform encoded by the CS26 gene in Arabidopsis thaliana has been described as an S-sulfocysteine synthase enzyme that plays an important role in chloroplast function. This enzyme is located in the thylakoid lumen, and its S-sulfocysteine activity is essential for the proper photosynthetic performance of the chloroplast under long-day growth conditions. Based on the present knowledge of this enzyme, we suggest that S-sulfocysteine synthase functions as a protein sensor to detect the accumulation of thiosulfate as a result of the inadequate detoxification of reactive oxygen species generated under conditions of excess light to produce the S-sulfocysteine molecule that triggers protection mechanisms of the photosynthetic apparatus.
Show more [+] Less [-]We would like to thank the European Regional Development Fund and the Ministerio de Economía y Competitividad (grant no. BIO2010-15201 and CSD2007–00057) Spain, for their financial support.
Show more [+] Less [-]Peer reviewed
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