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Taylor and Francis Group, Plant Signaling & Behavior, 5(8), p. e24007

DOI: 10.4161/psb.24007

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L-Cysteine Desulfhydrase 1 modulates the generation of the signaling molecule sulfide in plant cytosol

Journal article published in 2013 by Luis C. Romero ORCID, Irene García, Cecilia Gotor ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Consistent with data in animal systems, experimental evidence highlights sulfide as a signaling molecule of equal importance to NO and H2O2 in plant systems. In mammals, two cytosolic enzymes, cystathionine β-synthase (CBS) and cystathionine γ-lyase (CSE), have been shown to be responsible for the endogenous production of sulfide. L-cysteine desulfhydrase 1 (DES1) has been recently established as the only enzyme that is involved in the generation of hydrogen sulfide in plant cytosol. Although plants have an available source of sulfide within chloroplasts, the basic stromal pH prevents sulfide release into the cytosol. Therefore, DES1 is essential for the production of sulfide for signaling purposes.