Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 13, Issue 7, Pages 7994-8024Publisher
MDPI
DOI: 10.3390/ijms13077994
Keywords
glutamine synthetase; Lotus japonicus; functional genomics; nitrogen metabolism
Funding
- Junta de Andalucia (Spain) [CVI-P07-3026, CVI-P10-6368, BIO163]
- University of Seville
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Glutamine synthetase (GS) is the key enzyme involved in the assimilation of ammonia derived either from nitrate reduction, N-2 fixation, photorespiration or asparagine breakdown. A small gene family is encoding for different cytosolic (GS1) or plastidic (GS2) isoforms in legumes. We summarize here the recent advances carried out concerning the quaternary structure of GS, as well as the functional relationship existing between GS2 and processes such as nodulation, photorespiration and water stress, in this latter case by means of proline production. Functional genomic analysis using GS2-minus mutant reveals the key role of GS2 in the metabolic control of the plants and, more particularly, in carbon metabolism.
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