ArticleScientific reports2019
The Blue-Green Sensory Rhodopsin SRM from Haloarcula marismortui Attenuates Both Phototactic Responses Mediated by Sensory Rhodopsin I and II in Halobacterium salinarum.
Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 4 citations in OpenAlex.
- Cryo-EM structure of the SRI-HtrI complex reveals the cytoplasmic coupling in an archaeal phototaxis system.Nature communications · 2026Article
- Halophilic archaea produce wax esters and use an alternative fatty acyl-coenzyme A reductase for precursor synthesis.The ISME journal · 2025Article
- Bacterial Pigments as a Promising Alternative to Synthetic Colorants: From Fundamentals to Applications.Journal of microbiology and biotechnology · 2024Review
- HwMR is a novel magnesium-associated protein.Biophysical journal · 2022Article
- The Photoreaction of the Proton-Pumping Rhodopsin 1 From the Maize Pathogenic BasidiomyceteFrontiers in molecular biosciences · 2022Article
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Haloarchaea utilize various microbial rhodopsins to harvest light energy or to mediate phototaxis in search of optimal environmental niches. To date, only the red light-sensing sensory rhodopsin I (SRI) and the blue light-sensing sensory rhodopsin II (SRII) have been shown to mediate positive and negative phototaxis, respectively. In this work, we demonstrated that a blue-green light-sensing (504 nm) sensory rhodopsin from Haloarcula marismortui, SRM, attenuated both positive and negative phototaxis through its sensing region. The H. marismortui genome encodes three sensory rhodopsins: SRI, SRII and SRM. Using spectroscopic assays, we first demonstrated the interaction between SRM and its cognate transducer, HtrM. We then transformed an SRM-HtrM fusion protein into Halobacterium salinarum, which contains only SRI and SRII, and observed that SRM-HtrM fusion protein decreased both positive and negative phototaxis of H. salinarum. Together, our results suggested a novel phototaxis signalling system in H. marismortui comprised of three sensory rhodopsins in which the phototactic response of SRI and SRII were attenuated by SRM.
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