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Glutamate synthase and the synthesis of glutamate in plants.

Lea, Peter John and Miflin, Ben J. (2003) Glutamate synthase and the synthesis of glutamate in plants. Plant Physiology and Biochemistry, 41 (6-7). pp. 555-564. ISSN 0981-9428

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Abstract

The discovery of glutamate synthases (E.C. 1.4.1.13 and E.C. 1.4.7.1) caused a major re-assessment of the way in which ammonium is assimilated in bacteria and higher plants. The history of that discovery is reviewed and considered in the light of recent developments in the biochemistry and genetics of the higher plant ferredoxin- and NADH-dependent enzymes. The evidence is consistent with the view that plants synthesise glutamate from ammonia by the combined activity of glutamine synthetase (E.C. 6.3.1.2) and glutamate synthase (the glutamate synthase cycle) and that glutamate dehydrogenase (GDH, E.C. 1.4.1.2) plays no significant part in glutamate formation. The evidence does, however, suggest an important role for GDH as a catabolic shunt to ensure N metabolism does not adversely affect mitochondrial function and to enable the synthesis of N-rich transport compounds during nitrogen remobilisation.

Item Type: Article
Journal or Publication Title: Plant Physiology and Biochemistry
Uncontrolled Keywords: Ammonia assimilation ; Enzyme mechanisms ; Gene expression ; Glutamate dehydrogenase ; Glutamate synthase ; Higher plants ; Localisation
Subjects: Q Science > QH Natural history > QH301 Biology
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 10707
Deposited By: Mr Richard Ingham
Deposited On: 22 Jul 2008 16:55
Refereed?: Yes
Published?: Published
Last Modified: 18 Sep 2013 15:56
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/10707

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