ArticleThe EMBO journal1996
Different modes of proton translocation by sensory rhodopsin I.
Article in The EMBO journal, 1996. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- A Schiff base connectivity switch in sensory rhodopsin signaling.Proceedings of the National Academy of Sciences of the United States of America · 2008Article
- Proton transfer dynamics on the surface of the late M state of bacteriorhodopsin.Biophysical journal · 2002Article
- Electrophysiological characterization of specific interactions between bacterial sensory rhodopsins and their transducers.Proceedings of the National Academy of Sciences of the United States of America · 2001Article
- Photo-induced proton transport of pharaonis phoborhodopsin (sensory rhodopsin II) is ceased by association with the transducer.Biophysical journal · 2001Article
- Aspartate 75 mutation in sensory rhodopsin II from Natronobacterium pharaonis does not influence the production of the K-like intermediate, but strongly affects its relaxation pathway.Biophysical journal · 2000Article
- Sensory rhodopsin II from the haloalkaliphilic natronobacterium pharaonis: light-activated proton transfer reactions.Biophysical journal · 2000Article
- Proton circulation during the photocycle of sensory rhodopsin II.Biophysical journal · 1999Article
- Bioenergetics of the Archaea.Microbiology and molecular biology reviews : MMBR · 1999Review
- Time-resolved absorption and photothermal measurements with sensory rhodopsin I from Halobacterium salinarum.Biophysical journal · 1999Article
- Voltage dependence of proton pumping by bacteriorhodopsin is regulated by the voltage-sensitive ratio of M1 to M2.Biophysical journal · 1998Article
- Specific arginine and threonine residues control anion binding and transport in the light-driven chloride pump halorhodopsin.The EMBO journal · 1997Article
Corrections and comments
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The membrane-bound complex between sensory rhodopsin I (SRI) and its transducer HtrI forms the functional photoreceptor unit that allows transmission of light signals to the flagellar motor. Although being a photosensor, SRI, the mutant SRI-D76N and the HtrI-SRI complex can transport protons, as we demonstrate by using the sensitive and ion-specific black lipid membrane technique. SRI sustains an orange light-driven (one-photon-driven) outward proton transport which is enhanced by additional blue light (two-photon-driven). The vectoriality of the two-photon-driven transport could be reversed at neutral pH from the outward to the inward direction by switching the cut-off wavelength of the long wavelength light from 550 to 630 nm. The cut-off wavelength determining the reversal point decreases with decreasing pH. The currents could be enhanced by azide. A two-photon-driven inward proton transport by SRI-D76N (catalyzed by azide) and by the complex HtrI-SRI is demonstrated. The influence of pH and azide concentration on the rise and decay kinetics of the SRI380 intermediate is analyzed. The different modes of proton translocation of the SRI species are discussed on the basis of a general model of proton translocation of retinal proteins and in the context of signal transduction.
Indexed as
Identifiers
8617229PMC450100What OpenQuestion holds
Registered trials
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