Phosphoserine Aminotransferase in Soybean Root Nodules | Zendy

Paul H. S. Reynolds | Zendy; Dale G. Blevins | Zendy

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Phosphoserine Aminotransferase in Soybean Root Nodules

Author(s) -

Paul H. S. Reynolds,

Dale G. Blevins

Publication year - 1986

Publication title -

plant physiology

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.81.1.293

Subject(s) - phosphoserine , glycine , serine , root nodule , biochemistry , fractionation , biogenesis , biosynthesis , nodule (geology) , biology , enzyme , chemistry , nitrogen fixation , gene , amino acid , chromatography , bacteria , paleontology , genetics

Phosphoserine aminotransferase activity was detected in the plant and bacteroid fractions from soybean (Glycine max) root nodules. Both total and specific activities increased in the plant fraction during nodule development. Serine-pyruvate aminotransferase activity was not detectable in the plant or bacteroid fractions of these nodules. Sucrose density gradient fractionation indicated a proplastid localization for phosphoserine aminotransferase. The data presented support a role for this enzyme in carbon supply to purine biosynthesis in the pathway of ureide biogenesis in soybean nodules.

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