RGD Reference Report - The system N transporter SN2 doubles as a transmitter precursor furnisher and a potential regulator of NMDA receptors. - Rat Genome Database

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The system N transporter SN2 doubles as a transmitter precursor furnisher and a potential regulator of NMDA receptors.

Authors: Hamdani, El Hassan  Gudbrandsen, Marius  Bjørkmo, Mona  Chaudhry, Farrukh Abbas 
Citation: Hamdani el H, etal., Glia. 2012 Nov;60(11):1671-83. doi: 10.1002/glia.22386. Epub 2012 Jul 20.
RGD ID: 153298961
Pubmed: PMID:22821889   (View Abstract at PubMed)
DOI: DOI:10.1002/glia.22386   (Journal Full-text)

Activation of NMDA receptor requires two co-agonists, glutamate and glycine. Despite its intrinsic role in brain functions molecular mechanisms involved in glutamate replenishment and identification of the origin of glycine have eluded characterization. We have performed direct measurements of glycine flux by SN2 (Slc38a5; also known as SNAT5), executed extensive electrophysiological characterization as well as implemented ratiometric analyses to show that SN2 transport resembles SN1 in mechanism but differ in functional implications. We report that rat SN2 mediates electroneutral and bidirectional transport of glutamine and glycine at perisynaptic astroglial membranes. Sophisticated coupled and uncoupled movements of H(+) differentially associate with glutamine and glycine transport by SN2 and regulate pH(i) and the release mode of the transporter. Consequently, SN2 doubles as a transmitter precursor furnisher and a potential regulator of NMDA receptors.



Gene Ontology Annotations    

Biological Process

Molecular Function

Objects Annotated

Genes (Rattus norvegicus)
Slc38a5  (solute carrier family 38, member 5)


Additional Information