Chromophore/protein and chromophore/anion interactions in halorhodopsin
نویسندگان
چکیده
منابع مشابه
Functional reconstitution of halorhodopsin. Properties of halorhodopsin-containing proteoliposomes.
A one-step purification method for halorhodopsin was developed. Functional proteoliposomes were prepared from this preparation using cholate, which is removed by dialysis in the presence of asolectin or the polar halobacterial lipids. Light-induced outward directed transport of chloride by halorhodopsin was followed by measuring passive proton efflux in the presence of uncoupler; initial rates ...
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Procedures are described for selectively radiolabeling the protein moiety (haloopsin) or the chromophoric prosthestic group (retinal) of the light-driven chloride pump halorhodopsin in intact cells of Halobacterium halobium. By sodium dodecyl sulfate-polyacrylamide gel electrophoresis and autofluorography, two retinal-binding polypeptides are observed to band near the known molecular weight of ...
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Expression of halorhodopsin (NpHR), a light-driven microbial chloride pump, enables optical control of membrane potential and reversible silencing of targeted neurons. We generated transgenic zebrafish expressing enhanced NpHR under control of the Gal4/UAS system. Electrophysiological recordings showed that eNpHR stimulation effectively suppressed spiking of single neurons in vivo. Applying lig...
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Properties and Photochemistry of a Halorhodopsin from the
Pharaonis halorhodopsin is a light-driven transport system for chloride, similarly to the previously described halorhodopsin, but we find that it transports nitrate as effectively as chloride. We studied the photoreactions of the purified, detergent-solubilized pharaonis pigment with a gated multichannel analyzer. At a physiological salt concentration (4 M NaCl), the absorption spectra and rate...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1988
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(88)83080-7