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  • Title: The neuronal glycine transporter 2 interacts with the PDZ domain protein syntenin-1.
    Author: Ohno K, Koroll M, El Far O, Scholze P, Gomeza J, Betz H.
    Journal: Mol Cell Neurosci; 2004 Aug; 26(4):518-29. PubMed ID: 15276154.
    Abstract:
    The glycine transporter subtype 2 (GlyT2) is localized at glycinergic axon terminals where it mediates the re-uptake of glycine from the extracellular space. In this study, we used the yeast two-hybrid system to search for proteins that interact with the cytoplasmic carboxy terminal tail region of GlyT2. Screening of a rat brain cDNA library identified the PDZ domain protein syntenin-1 as an intracellular binding partner of GlyT2. In pull-down experiments, the interaction between GlyT2 and syntenin-1 was found to involve the C-terminal amino acid residues of GlyT2 and the PDZ2 domain of syntenin-1. Syntenin-1 is widely expressed in brain and co-localizes with GlyT2 in brainstem sections. Furthermore, syntenin-1 binds syntaxin 1A, which is known to regulate the plasma membrane insertion of GlyT2. Thus, syntenin-1 may be an in vivo binding partner of GlyT2 that regulates its trafficking and/or presynaptic localization in glycinergic neurons.
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