Recommend Plant Signaling & Behavior (PS&B) to your librarian for 2008. Download form here.

Sign up for Table of Contents Alerts!

PS&B is the official journal of the Society for Plant Neurobiology. Full membership ($60 annually) and student membership ($30 annually) include online access to the journal. Click here to join.

Email this page

Print this page

Article Addendum

Cytosolic cysteine in redox signaling

M. Carmen López-Martín, Luis C. Romero and Cecilia Gotor

Purchase article for $19

Subscribe to this journal for $79/year

Cysteine biosynthesis in plants takes place in the three cellular compartments with autonomous protein biosynthesis machinery: cytosol, plastids and mitochondria. This sulfur-containing molecule is synthesized sequentially in these compartments by two enzymatic families, the serine acetyltransferases and the O-acetylserine(thiol)lyases. Each family consists of several isoforms that differ in subcellular localization and abundance. Why so many isoforms are required in plant cell for cysteine biosynthesis has remained unknown to date. The characterization of gene-specific knockout mutants has started to address this question. In our recent work, we have performed a detailed analysis of the Arabidopsis oas-a1 null mutant and showed that the antioxidant capacity of the cytosol is compromised highlighting the contribution of cytosolic Cys in redox signaling.

Addendum to: Knocking out cytosolic cysteine synthesis compromises the antioxidant capacity of the cytosol to maintain discrete concentrations of hydrogen peroxide in Arabidopsis. López-Martín MC, Becana M, Romero LC, Gotor C. Plant Physiol 2008; In press.

Authors

M. Carmen López-Martín

Instituto de Bioquímica Vegetal y Fotosíntesis; Consejo Superior de Investigaciones Científicas and Universidad de Sevilla; Sevilla, Spain

Luis C. Romero

Instituto de Bioquímica Vegetal y Fotosíntesis; Consejo Superior de Investigaciones Científicas and Universidad de Sevilla; Sevilla, Spain

Cecilia Gotor

Instituto de Bioquímica Vegetal y Fotosíntesis; Consejo Superior de Investigaciones Científicas and Universidad de Sevilla; Sevilla, Spain

Purchase article for $19

Subscribe to this journal for $79/year