Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: HUMANGGP:029852 (glutamate transporter)
 2,528 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Pharmacological properties of a cDNA clone encoding a high affinity, Na(+)-dependent L-glutamate transporter (GluT-1) were examined using Xenopus oocytes. L-[3H]glutamate transport was inhibited by the putative endogenous substrates L-aspartate (Ki = 65 microM) and L-glutamate (Ki = 70 microM). L-Homocysteate did not significantly inhibit high-affinity glutamate transport (Ki = 2.7 mM). Of the previously identified uptake inhibitors, DL-threo-beta-hydroxyaspartate (Ki = 65 microM), L-cysteine sulfinate (Ki = 80 microM), beta-glutamate (Ki = 475 microM) and L-aspartate-beta-hydroxamate (Ki = 950 microM) inhibited L-glutamate uptake. The other L-glutamate uptake blockers examined, including dihydrokainate, L-alpha-aminoadipate and SITS, weakly inhibited uptake of L-glutamate with Ki values in excess of 1 mM. These features of the inhibitor sensitivities of GluT-1 transport show that GluT-1 is less sensitive to these agents than previously characterized glutamate transporters in rat brain, suggesting that GluT-1 is a novel glutamate transporter with a unique pharmacologic profile.
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PMID:Pharmacological characterization of a cloned rat glutamate transporter (GluT-1). 790 50