Open AccessLOVIT Is a Putative Vesicular Histamine Transporter Required in Drosophila for Vision
Author(s) -
Ying Xu,
Tao Wang
Publication year - 2019
Publication title -
cell reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.264
H-Index - 154
eISSN - 2639-1856
pISSN - 2211-1247
DOI - 10.1016/j.celrep.2019.04.024
Subject(s) - synaptic vesicle , vesicular monoamine transporter , histamine , neurotransmitter , vesicular monoamine transporter 2 , neurotransmission , microbiology and biotechnology , neurotransmitter transporter , transporter , biology , vesicular transport protein , vesicular acetylcholine transporter , monoamine neurotransmitter , neuroscience , cholinergic , vesicle , biochemistry , dopamine transporter , pharmacology , central nervous system , gene , choline acetyltransferase , receptor , membrane , serotonin
Classical fast neurotransmitters are loaded into synaptic vesicles and concentrated by the action of a specific vesicular transporter before being released from the presynaptic neuron. In Drosophila, histamine is distributed mainly in photoreceptors, where it serves as the main neurotransmitter for visual input. In a targeted RNAi screen for neurotransmitter transporters involved in concentrating photoreceptor synaptic histamine, we identified an SLC45 transporter protein, LOVIT (loss of visual transmission). LOVIT is prominently expressed in photoreceptor synaptic vesicles and is required for Drosophila visual neurotransmission. Null mutations of lovit severely reduced the concentration of histamine in photoreceptor terminals. These results demonstrate a LOVIT-dependent mechanism, maintaining the synaptic concentration of histamine, and provide evidence for a histamine vesicular transporter besides the vesicular monoamine transporter (VMAT) family.
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