alexa Cloning of nicotianamine synthase genes, novel genes involved in the biosynthesis of phytosiderophores.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Transcriptomics: Open Access

Author(s): Higuchi K, Suzuki K, Nakanishi H, Yamaguchi H, Nishizawa NK, , Higuchi K, Suzuki K, Nakanishi H, Yamaguchi H, Nishizawa NK,

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Abstract Nicotianamine synthase (NAS), the key enzyme in the biosynthetic pathway for the mugineic acid family of phytosiderophores, catalyzes the trimerization of S-adenosylmethionine to form one molecule of nicotianamine. We purified NAS protein and isolated the genes nas1, nas2, nas3, nas4, nas5-1, nas5-2, and nas6, which encode NAS and NAS-like proteins from Fe-deficient barley (Hordeum vulgare L. cv Ehimehadaka no. 1) roots. Escherichia coli expressing nas1 showed NAS activity, confirming that this gene encodes a functional NAS. Expression of nas genes as determined by northern-blot analysis was induced by Fe deficiency and was root specific. The NAS genes form a multigene family in the barley and rice genomes.
This article was published in Plant Physiol and referenced in Transcriptomics: Open Access

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