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Plant Physiology 52:98-104 (1973)
© 1973 American Society of Plant Biologists

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Isolation and Characterization of Glucosamine-containing Storage Glycoproteins from the Cotyledons of Phaseolus aureus1

Mary C. Ericson and Maarten J. Chrispeels2

a Department of Biology, University of California, San Diego, California 92037

Cotyledons of Phaseolus aureus contain protein-bound glucosamine which is metabolized during germination. The glucosamine is present in storage glycoproteins, and these are concurrently metabolized along with the glucosamine. These glycoproteins are associated with protein bodies. Characterization of the glucosamine-containing storage proteins showed them to be identical with vicilin and legumin, the major storage proteins of the Leguminosae. Phaseolus aureus vicilin has a sedimentation constant of 8.0S and is made up of four nonidentical subunits. It contains 0.2% glucosamine and 1% mannose. Legumin has a sedimentation constant of 11.3S and is made up of three nonidentical subunits. It contains about 0.1% glucosamine.

2 To whom inquiries should be addressed.

1 This research was supported by Grants GB 30235 and GB 27386X from the National Science Foundation.




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A. Schlereth, C. Becker, C. Horstmann, J. Tiedemann, and K. Muntz
Comparison of globulin mobilization and cysteine proteinases in embryonic axes and cotyledons during germination and seedling growth of vetch (Vicia sativa L.)
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[Abstract] [Full Text] [PDF]


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Copyright © 1973 by the American Society of Plant Biologists