Document Detail

Current understanding of the factors regulating methionine content in vegetative tissues of higher plants.
MedLine Citation:
PMID:  20140469     Owner:  NLM     Status:  MEDLINE    
Methionine is a nutritionally essential, sulfur-containing amino acid found in low levels in plants, which often limits its value as a source of dietary protein to humans and animals. Methionine is also a fundamental metabolite in plant cells since, through its first metabolite, S-adenosylmethionine (SAM), it controls the level of several key metabolites, such as ethylene, polyamines and biotin. SAM is also the primary methyl group donor that regulates different processes in plants. Despite its nutritional and regulatory significance, the factors regulating methionine content in plants are not fully known. In this review, we summarize the current knowledge and recent progress made in our understanding of the methionine metabolism. The enzymes and substrates that regulate methionine synthesis were described, as well as the influences of the catabolic pathways of methionine on its content. The current effort to tailor an improvement of methionine content in vegetative tissues with minimal interference in plant growth and productivity is described as well. The accumulated knowledge has provided new insights into the control of methionine level in plants and, in some cases, has resulted in significant improvements in the nutritional value of plants.
Rachel Amir
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review     Date:  2010-02-06
Journal Detail:
Title:  Amino acids     Volume:  39     ISSN:  1438-2199     ISO Abbreviation:  Amino Acids     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-09-27     Completed Date:  2010-11-22     Revised Date:  2012-07-13    
Medline Journal Info:
Nlm Unique ID:  9200312     Medline TA:  Amino Acids     Country:  Austria    
Other Details:
Languages:  eng     Pagination:  917-31     Citation Subset:  IM    
MIGAL, Galilee Technology Center, Kiryat Shmona, Israel.
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MeSH Terms
Animal Feed
Carbon-Oxygen Lyases / metabolism
Crops, Agricultural / metabolism
Gene Expression Regulation, Plant
Methionine / biosynthesis*,  metabolism*
Methyltransferases / metabolism
Plants / metabolism*
S-Adenosylmethionine / metabolism*
Seed Storage Proteins / biosynthesis
Reg. No./Substance:
0/Seed Storage Proteins; 29908-03-0/S-Adenosylmethionine; 63-68-3/Methionine; EC 2.1.1.-/Methyltransferases; EC (thiol)-lyase; EC 4.2.-/Carbon-Oxygen Lyases; EC synthase

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