Plant Physiol. Illumina
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Plant Physiology 54:725-736 (1974)
© 1974 American Society of Plant Biologists

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Web of Science (35)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Giovanelli, J.
Right arrow Articles by Datko, A. H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Giovanelli, J.
Right arrow Articles by Datko, A. H.
Agricola
Right arrow Articles by Giovanelli, J.
Right arrow Articles by Datko, A. H.
Articles

Homoserine Esterification in Green Plants

John Giovanelli, S. Harvey Mudd and Anne H. Datko

1 Laboratory of General and Comparative Biochemistry, National Institute of Mental Health, Bethesda, Maryland 20014

Extracts of phylogenetically diverse plans were surveyed for their ability to synthesize the following homoserine esters which are potential precursors for methionine and threonine synthesis in green plants: O-acetyl-, O-oxalyl-, O-succinyl-, O-malonyl-, and O-phosphohomoserine. Synthesis of O-acylhomoserine esters was detected only in Pisum sativum L. and Lathyrus sativus L. Extracts of P. sativum, a plant known to accumulate O-acetylhomoserine, catalyzed the specific synthesis of this ester from homoserine and acetyl-CoA. Extracts of L. sativus, a plant known to accumulate O-oxalylhomoserine, catalyzed the specific synthesis of this ester from homoserine and oxalyl-CoA. None of the other plants surveyed, including representatives of the green algae, horsetails, gymnosperms, and angiosperms, catalyzed the synthesis of any of the O-acylhomoserine esters studied. In contrast, synthesis of O-phosphohomoserine by the reaction catalyzed by homoserine kinase was demonstrated in extracts of all plants examined, including the two exceptional legumes.

These results suggest that, among the five homoserine esters studied, O-phosphohomoserine is the major activated homoserine derivative in plants. Direct confirmation of the dominant physiological role of O-phosphohomoserine in the synthesis of cystathionine in the transsulfuration pathway of methionine biosynthesis in plants has recently been provided (Datko, A. H., Giovanelli, J., and Mudd, S. H. 1974. J. Biol. Chem. 249: 1139-1155).




This article has been cited by other articles:


Home page
 J. Bacteriol.Home page
N. D. Keshavan, P. K. Chowdhary, D. C. Haines, and J. E. Gonzalez
L-Canavanine Made by Medicago sativa Interferes with Quorum Sensing in Sinorhizobium meliloti
J. Bacteriol., December 15, 2005; 187(24): 8427 - 8436.
[Abstract] [Full Text] [PDF]

Home page
 J. Biol. Chem.Home page
J. F. Ma, T. Shinada, C. Matsuda, and K. Nomoto
Biosynthesis of Phytosiderophores, Mugineic Acids, Associated with Methionine Cycling
J. Biol. Chem., July 14, 1995; 270(28): 16549 - 16554.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1974 by the American Society of Plant Biologists