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Nat Neurosci
2008 Jun 01;116:631-3. doi: 10.1038/nn.2120.
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Red-shifted optogenetic excitation: a tool for fast neural control derived from Volvox carteri.
Zhang F
,
Prigge M
,
Beyrière F
,
Tsunoda SP
,
Mattis J
,
Yizhar O
,
Hegemann P
,
Deisseroth K
.
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The introduction of two microbial opsin-based tools, channelrhodopsin-2 (ChR2) and halorhodopsin (NpHR), to neuroscience has generated interest in fast, multimodal, cell type-specific neural circuit control. Here we describe a cation-conducting channelrhodopsin (VChR1) from Volvox carteri that can drive spiking at 589 nm, with excitation maximum red-shifted approximately 70 nm compared with ChR2. These results demonstrate fast photostimulation with yellow light, thereby defining a functionally distinct third category of microbial rhodopsin proteins.
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