Uptake of glutamate into synaptic vesicles by an inorganic phosphate transporter.
Previous work has identified two families of proteins that transport classical neurotransmitters into synaptic vesicles, but the protein responsible for vesicular transport of the principal excitatory transmitter glutamate has remained unknown. We demonstrate that a protein that is unrelated to any known neurotransmitter transporters and that was previously suggested to mediate the Na(+)-dependent uptake of inorganic phosphate across the plasma membrane transports glutamate into synaptic vesicles. In addition, we show that this vesicular glutamate transporter, VGLUT1, exhibits a conductance for chloride that is blocked by glutamate.
Department of Neurology, University of California at San Francisco School of Medicine, 513 Parnassus Avenue, San Francisco, CA 94143-0435, USA.
E E
EE
Bellocchio
R J
RJ
Reimer
R T
RT
Fremeau
R H
RH
Edwards
D017878:4,4'-Diisothiocyanostilbene-2,2'-Disulfonic Acid / Q000494:pharmacology; D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D001693:Biological Transport, Active / Q000187:drug effects; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism*; D002462:Cell Membrane / Q000378:metabolism; D002712:Chlorides / Q000378:metabolism; D018698:Glutamic Acid / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D016716:PC12 Cells; D010710:Phosphates / Q000378:metabolism; D011189:Potassium Chloride / Q000378:metabolism; D051381:Rats; D050608:Sodium-Phosphate Cotransporter Proteins; D027981:Symporters; D013572:Synaptic Vesicles / Q000378:metabolism*; D014162:Transfection
D002352:Carrier Proteins; D002712:Chlorides; D010710:Phosphates; D050608:Sodium-Phosphate Cotransporter Proteins; D027981:Symporters; D018698:Glutamic Acid; D011189:Potassium Chloride; D000255:Adenosine Triphosphate; D017878:4,4'-Diisothiocyanostilbene-2,2'-Disulfonic Acid