S-sulfocysteine synthase function in sensing chloroplast redox status
2013
Gotor Martínez, Cecilia | Romero González, Luis Carlos | Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular
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 [-]European Regional Development Fund the Ministerio de Economía y Competitividad BIO2010-15201 CSD2007-00057
Show more [+] Less [-]Junta de Andalucia CVI-7190
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