Regulation of sugar, amino acid and peptide plant membrane transporters.
During the past few years, various cDNAs encoding the proton cotransporters which mediate the uptake of sucrose, hexoses, amino acids and peptides across the plant plasma membrane have been cloned. This has made possible some preliminary insight into the regulation of the activity of these transporters at various levels. The paper summarises the present status of knowledge and gaps relative to their transcriptional control (organ, tissue and cell specificity, response to the environment) and post-transcriptional control (targeting and turnover, kinetic and thermodynamic control, lipidic environment, phosphorylation). This outline and the description of a few cases (the sink/source transition of the leaf, the pollen grain, the legume seed) serve as a basis for suggesting some directions for future research.
Delrot
S
S
ESA CNRS 6161, Laboratoire de Physiologie et Biochimie Végétales, Bâtiment Botanique, Université Poitiers, 40 Avenue du Recteur Pineau, 86022, Poitiers, France. serge.delrot@campus.univ-poitiers.fr
Atanassova
R
R
Maurousset
L
L
D026905:Amino Acid Transport Systems; D001692:Biological Transport; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism*; D002462:Cell Membrane / Q000378:metabolism; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D004777:Environment; D018506:Gene Expression Regulation, Plant; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism; D026901:Membrane Transport Proteins; D009004:Monosaccharide Transport Proteins / Q000235:genetics / Q000378:metabolism; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D018514:Plant Structures / Q000378:metabolism; D011401:Promoter Regions, Genetic; D011499:Protein Processing, Post-Translational; D027981:Symporters; D013816:Thermodynamics; D014158:Transcription, Genetic
D026905:Amino Acid Transport Systems; D002352:Carrier Proteins; D018076:DNA, Complementary; D008565:Membrane Proteins; D026901:Membrane Transport Proteins; D009004:Monosaccharide Transport Proteins; D010940:Plant Proteins; D027981:Symporters; C089820:monosaccharide-hydrogen cotransporter; C078729:sucrose transport protein, plant