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-Structure paper
タイトル | Ion transport and regulation in a synaptic vesicle glutamate transporter. |
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ジャーナル・号・ページ | Science, Vol. 368, Issue 6493, Page 893-897, Year 2020 |
掲載日 | 2020年5月22日 |
著者 | Fei Li / Jacob Eriksen / Janet Finer-Moore / Roger Chang / Phuong Nguyen / Alisa Bowen / Alexander Myasnikov / Zanlin Yu / David Bulkley / Yifan Cheng / Robert H Edwards / Robert M Stroud / |
PubMed 要旨 | Synaptic vesicles accumulate neurotransmitters, enabling the quantal release by exocytosis that underlies synaptic transmission. Specific neurotransmitter transporters are responsible for this ...Synaptic vesicles accumulate neurotransmitters, enabling the quantal release by exocytosis that underlies synaptic transmission. Specific neurotransmitter transporters are responsible for this activity and therefore are essential for brain function. The vesicular glutamate transporters (VGLUTs) concentrate the principal excitatory neurotransmitter glutamate into synaptic vesicles, driven by membrane potential. However, the mechanism by which they do so remains poorly understood owing to a lack of structural information. We report the cryo-electron microscopy structure of rat VGLUT2 at 3.8-angstrom resolution and propose structure-based mechanisms for substrate recognition and allosteric activation by low pH and chloride. A potential permeation pathway for chloride intersects with the glutamate binding site. These results demonstrate how the activity of VGLUTs can be coordinated with large shifts in proton and chloride concentrations during the synaptic vesicle cycle to ensure normal synaptic transmission. |
リンク | Science / PubMed:32439795 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.8 Å |
構造データ | EMDB-21040: Structure of the rat vesicular glutamate transporter 2 determined by single particle Cryo-EM |
由来 |
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キーワード | MEMBRANE PROTEIN / glutamate transport / synaptic vesicle / Major facilitator Superfamily / excitatory neurotransmission |