| Literature DB >> 9952442 |
K Higuchi1, K Suzuki, H Nakanishi, H Yamaguchi, N K Nishizawa, S Mori.
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.Entities:
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Year: 1999 PMID: 9952442 PMCID: PMC32123 DOI: 10.1104/pp.119.2.471
Source DB: PubMed Journal: Plant Physiol ISSN: 0032-0889 Impact factor: 8.340