PMID- 29666153 OWN - NLM STAT- MEDLINE DCOM- 20190930 LR - 20190930 IS - 1540-7748 (Electronic) IS - 0022-1295 (Print) IS - 0022-1295 (Linking) VI - 150 IP - 5 DP - 2018 May 7 TI - The ins and outs of vesicular monoamine transporters. PG - 671-682 LID - 10.1085/jgp.201711980 [doi] AB - The H(+)-coupled vesicular monoamine transporter (VMAT) is a transporter essential for life. VMAT mediates packaging of the monoamines serotonin, dopamine, norepinephrine, and histamine from the neuronal cytoplasm into presynaptic vesicles, which is a key step in the regulated release of neurotransmitters. However, a detailed understanding of the mechanism of VMAT function has been limited by the lack of availability of high-resolution structural data. In recent years, a series of studies guided by homology models has revealed significant insights into VMAT function, identifying residues that contribute to the binding site and to specific steps in the transport cycle. Moreover, to characterize the conformational transitions that occur upon binding of the substrate and coupling ion, we have taken advantage of the unique and powerful pharmacology of VMAT as well as of mutants that affect the conformational equilibrium of the protein and shift it toward defined conformations. This has allowed us to identify an important role for the proton gradient in driving a shift from lumen-facing to cytoplasm-facing conformations. CI - (c) 2018 Yaffe et al. FAU - Yaffe, Dana AU - Yaffe D AD - Department of Biological Chemistry, Alexander Silberman Institute of Life Sciences, Hebrew University, Jerusalem, Israel dana.yaffe@mail.huji.ac.il. FAU - Forrest, Lucy R AU - Forrest LR AUID- ORCID: 0000-0003-1855-7985 AD - Computational Structural Biology Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD lucy.forrest@nih.gov. FAU - Schuldiner, Shimon AU - Schuldiner S AUID- ORCID: 0000-0002-4874-6237 AD - Department of Biological Chemistry, Alexander Silberman Institute of Life Sciences, Hebrew University, Jerusalem, Israel shimon.schuldiner@huji.ac.il. LA - eng SI - PDB/3WDO SI - PDB/4YBQ SI - PDB/4YB9 GR - R01 NS016708/NS/NINDS NIH HHS/United States GR - R56 NS016708/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, N.I.H., Intramural PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20180417 PL - United States TA - J Gen Physiol JT - The Journal of general physiology JID - 2985110R RN - 0 (Vesicular Monoamine Transport Proteins) SB - IM MH - Animals MH - Humans MH - Protein Domains MH - Vesicular Monoamine Transport Proteins/*chemistry/metabolism PMC - PMC5940252 EDAT- 2018/04/19 06:00 MHDA- 2019/10/01 06:00 PMCR- 2018/11/07 CRDT- 2018/04/19 06:00 PHST- 2018/01/16 00:00 [received] PHST- 2018/03/26 00:00 [accepted] PHST- 2018/04/19 06:00 [pubmed] PHST- 2019/10/01 06:00 [medline] PHST- 2018/04/19 06:00 [entrez] PHST- 2018/11/07 00:00 [pmc-release] AID - jgp.201711980 [pii] AID - 201711980 [pii] AID - 10.1085/jgp.201711980 [doi] PST - ppublish SO - J Gen Physiol. 2018 May 7;150(5):671-682. doi: 10.1085/jgp.201711980. Epub 2018 Apr 17.