doi: 10.1126/science.1086770.
Identification of a plant nitric oxide synthase gene involved in hormonal signaling
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- PMID: 14526079
- DOI: 10.1126/science.1086770
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Identification of a plant nitric oxide synthase gene involved in hormonal signaling
Science.
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Abstract
Nitric oxide (NO) serves as a signal in plants. An Arabidopsis mutant (Atnos1) was identified that had impaired NO production, organ growth, and abscisic acid-induced stomatal movements. Expression of AtNOS1 with a viral promoter in Atnos1 mutant plants resulted in overproduction of NO. Purified AtNOS1 protein used the substrates arginine and nicotinamide adenine dinucleotide phosphate and was activated by Ca2+ and calmodulin-like mammalian endothelial nitric oxide synthase and neuronal nitric oxide synthase, yet it is a distinct enzyme with no sequence similarities to any mammalian isoform. Thus, AtNOS1 encodes a distinct nitric oxide synthase that regulates growth and hormonal signaling in plants.
Comment in
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Plant nitric oxide synthase: a never-ending story?Trends Plant Sci. 2006 Nov;11(11):524-5; author reply 526-8. doi: 10.1016/j.tplants.2006.09.008. Epub 2006 Oct 9. Trends Plant Sci. 2006. PMID: 17030145 No abstract available.
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