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Conference Paper

Molecular analysis and control of cysteine biosynthesis: integration of nitrogen and sulphur metabolism

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons97193

Hesse,  H.
Amino Acid and Sulfur Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons97319

Nikiforova,  V.
System Integration, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons97197

Hoefgen,  R.
Amino Acid and Sulfur Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Citation

Hesse, H., Nikiforova, V., Gakiere, B., & Hoefgen, R. (2004). Molecular analysis and control of cysteine biosynthesis: integration of nitrogen and sulphur metabolism. In Journal of Experimental Botany (pp. 1283-1292).


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-2CCF-C
Abstract
Since cysteine is the first committed molecule in plant metabolism containing both sulphur and nitrogen, the regulation of its biosynthesis is critically important. Cysteine itself is required for the production of an abundance of key metabolites in diverse pathways. Plants alter their metabolism to compensate for sulphur and nitrogen deficiencies as best as they can, but limitations in either nutrient not only curb a plant's ability to synthesize cysteine, but also restrict protein synthesis. Nutrients such as nitrate and sulphate (and carbon) act as signals; they trigger molecular mechanisms that modify biosynthetic pathways and thereby have a profound impact on metabolite fluxes. Cysteine biosynthesis is modified by regulators acting at the site of uptake and throughout the plant system. Recent data point to the existence of nutrient-specific signal transduction pathways that relay information about external and internal nutrient concentrations, resulting in alterations to cysteine biosynthesis. Progress in this field has led to the cloning of genes that play pivotal roles in nutrient-induced changes in cysteine formation.