Simultaneous spectral illumination of microplates for high-throughput optogenetics and photobiology

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Item Type:	Article
Title:	Simultaneous spectral illumination of microplates for high-throughput optogenetics and photobiology
Creators Name:	Vogt, A., Paulat, R., Parthier, D., Just, V., Szczepek, M., Scheerer, P., Xu, Q., Möglich, A., Schmitz, D., Rost, B.R. and Wenger, N.
Abstract:	The biophysical characterization and engineering of optogenetic tools and photobiological systems has been hampered by the lack of efficient methods for spectral illumination of microplates for high-throughput analysis of action spectra. Current methods to determine action spectra only allow the sequential spectral illumination of individual wells. Here we present the open-source RainbowCap-system, which combines LEDs and optical filters in a standard 96-well microplate format for simultaneous and spectrally defined illumination. The RainbowCap provides equal photon flux for each wavelength, with the output of the LEDs narrowed by optical bandpass filters. We validated the RainbowCap for photoactivatable G protein-coupled receptors (opto-GPCRs) and enzymes for the control of intracellular downstream signaling. The simultaneous, spectrally defined illumination provides minimal interruption during time-series measurements, while resolving 10 nm differences in the action spectra of optogenetic proteins under identical experimental conditions. The RainbowCap is also suitable for studying the spectral dependence of light-regulated gene expression in bacteria, which requires illumination over several hours. In summary, the RainbowCap provides high-throughput spectral illumination of microplates, while its modular, customizable design allows easy adaptation to a wide range of optogenetic and photobiological applications.
Keywords:	Action Spectra, Cyclic Mononucleotides, GPCR, Photoactivated Nucleotidyl Cyclases, Rhodopsin, Signal Transduction
Source:	Biological Chemistry
ISSN:	1431-6730
Publisher:	de Gruyter
Date:	23 September 2024
Official Publication:	https://doi.org/10.1515/hsz-2023-0205
PubMed:	View item in PubMed

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