| Chapter title |
Glycine Transporters in Glia Cells: Structural Studies
|
|---|---|
| Chapter number | 2 |
| Book title |
Glial Amino Acid Transporters
|
| Published in |
Advances in neurobiology, January 2017
|
| DOI | 10.1007/978-3-319-55769-4_2 |
| Pubmed ID | |
| Book ISBNs |
978-3-31-955767-0, 978-3-31-955769-4
|
| Authors |
Beatriz López-Corcuera, Cristina Benito-Muñoz, Carmen Aragón, López-Corcuera, Beatriz, Benito-Muñoz, Cristina, Aragón, Carmen |
| Abstract |
Glycine, besides exerting essential metabolic functions, is an important inhibitory neurotransmitter in caudal areas of the central nervous system and also a positive neuromodulator at excitatory glutamate-mediated synapses. Glial cells provide metabolic support to neurons and modulate synaptic activity. Six transporters belonging to three solute carrier families (SLC6, SLC38, and SLC7) are capable of transporting glycine across the glial plasma membrane. The unique glial glycine-selective transporter GlyT1 (SLC6) is the main regulator of synaptic glycine concentrations, assisted by the neuronal GlyT2. The five additional glycine transporters ATB(0,+), SNAT1, SNAT2, SNAT5, and LAT2 display broad amino acid specificity and have differential contributions to glial glycine transport. Glial glycine transporters are divergent in sequence but share a similar architecture displaying the 5 + 5 inverted fold originally characterized in the leucine transporter LeuT. The availability of protein crystals solved at high resolution for prokaryotic and, more recently, eukaryotic homologues of this superfamily has advanced significantly our understanding of the mechanism of glycine transport. |
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|---|---|---|
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