Document Detail


The multifaceted role of aspartate-family amino acids in plant metabolism.
MedLine Citation:
PMID:  22516796     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Plants represent the major sources of human foods and livestock feeds, worldwide. However, the limited content of the essential amino acid lysine in cereal grains represents a major nutritional problem for human and for livestock feeding in developed countries. Optimizing the level of lysine in cereal grains requires extensive knowledge on the biological processes regulating the homeostasis of this essential amino acid as well as the biological consequences of this homeostasis. Manipulating biosynthetic and catabolic enzymes of lysine metabolism enabled an enhanced accumulation of this essential amino acid in seeds. However, this approach had a major effect on the levels of various metabolites of the tricarboxylic acid (TCA) cycle, revealing a strong interaction between lysine metabolism and cellular energy metabolism. Recent studies discussed here have shed new light on the metabolic processes responsible for the catabolism of lysine, as well as isoleucine, another amino acid of the aspartate-family pathway, into the TCA cycle. Here we discuss progress being made to understand biological processes associated with the catabolism of amino acids of the aspartate-family pathway and its importance for optimal improvement of the nutritional quality of plants.
Authors:
Menny Kirma; Wagner L Araújo; Alisdair R Fernie; Gad Galili
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-19
Journal Detail:
Title:  Journal of experimental botany     Volume:  -     ISSN:  1460-2431     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882906     Medline TA:  J Exp Bot     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Plant Science, The Weizmnn Institute of Science, Rehovot 76100, Israel.
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