Publication Date:
2005-03-19
Description:
Recognizing a deficiency of indispensable amino acids (IAAs) for protein synthesis is vital for dietary selection in metazoans, including humans. Cells in the brain's anterior piriform cortex (APC) are sensitive to IAA deficiency, signaling diet rejection and foraging for complementary IAA sources, but the mechanism is unknown. Here we report that the mechanism for recognizing IAA-deficient foods follows the conserved general control (GC) system, wherein uncharged transfer RNA induces phosphorylation of eukaryotic initiation factor 2 (eIF2) via the GC nonderepressing 2 (GCN2) kinase. Thus, a basic mechanism of nutritional stress management functions in mammalian brain to guide food selection for survival.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hao, Shuzhen -- Sharp, James W -- Ross-Inta, Catherine M -- McDaniel, Brent J -- Anthony, Tracy G -- Wek, Ronald C -- Cavener, Douglas R -- McGrath, Barbara C -- Rudell, John B -- Koehnle, Thomas J -- Gietzen, Dorothy W -- GM49164/GM/NIGMS NIH HHS/ -- NS043231/NS/NINDS NIH HHS/ -- NS33347/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2005 Mar 18;307(5716):1776-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Veterinary Medicine, Department of Anatomy, Physiology and Cell Biology, University of California, Davis, CA 95616, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15774759" target="_blank"〉PubMed〈/a〉
Keywords:
Acylation
;
Amino Acids, Essential/*administration & dosage/analysis/*deficiency
;
Animals
;
Diet
;
Eating
;
Eukaryotic Initiation Factor-2/*metabolism
;
*Food
;
Food Preferences
;
Leucine/administration & dosage/*analogs & derivatives/pharmacology
;
Mice
;
Mice, Inbred C57BL
;
Olfactory Pathways/*metabolism
;
Phosphorylation
;
Protein Kinases/*metabolism
;
Protein-Serine-Threonine Kinases
;
RNA, Transfer/*metabolism
;
Rats
;
Stereoisomerism
;
Threonine/administration & dosage
;
eIF-2 Kinase/metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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