Opsin-Mediated Inhibition of Bacterioruberin Synthesis in Halophilic Archaea [PDF]
Journal of Bacteriology, 2017 ABSTRACTHalophilic archaea often inhabit environments with limited oxygen, and many produce ion-pumping rhodopsin complexes that allow them to maintain electrochemical gradients when aerobic respiration is inhibited. Rhodopsins require a protein, an opsin, and an organic cofactor, retinal.
Ronald F, Peck +4 more
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In Situ Study of the Function of Bacterioruberin in the Dual‐Chromophore Photoreceptor Archaerhodopsin‐4 [PDF]
Angewandte Chemie International Edition, 2018 AbstractWhile certain archaeal ion pumps have been shown to contain two chromophores, retinal and the carotenoid bacterioruberin, the functions of bacterioruberin have not been well explored. To address this research gap, recombinant archaerhodopsin‐4 (aR4), either with retinal only or with both retinal and bacterioruberin chromophores, was ...
Sun, C +6 more
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Identification of carotenoids from the extremely halophilic archaeon Haloarcula japonica [PDF]
Frontiers in Microbiology, 2014 The carotenoids produced by extremely halophilic archaeon Haloarcula japonica were extracted and identified by their chemical, chromatographic, and spectroscopic characteristics (UV-Vis and mass spectrometry).
Rie eYatsunami +12 more
doaj +2 more sources
Carbon Source Influences Antioxidant, Antiglycemic, and Antilipidemic Activities of Haloferax mediterranei Carotenoid Extracts [PDF]
Marine Drugs, 2022 Haloarchaeal carotenoids have attracted attention lately due to their potential antioxidant activity. This work studies the effect of different concentrations of carbon sources on cell growth and carotenoid production.
Micaela Giani +3 more
doaj +2 more sources
Antioxidant Capacity of Carotenoid Extracts from the Haloarchaeon Halorhabdus utahensis [PDF]
Antioxidants, 2023 Herein, we report on the production, characterization, and antioxidant power assessment of carotenoids from the haloarchaeon Halorhabdus utahensis. It was grown at 37 °C and 180 rpm agitation in halobacteria medium supplemented with glucose, fructose ...
Ismene Serino +6 more
doaj +2 more sources
Carotenoids in Skin Photoaging: Unveiling Protective Effects, Molecular Insights, and Safety and Bioavailability Frontiers [PDF]
AntioxidantsSkin photoaging, driven primarily by ultraviolet radiation, remains a critical dermatological concern. Carotenoids, a class of natural pigments with potent antioxidant properties, have emerged as promising agents for preventing and mitigating photoaging.
Yingchao Ma +7 more
doaj +2 more sources
Deciphering Pathways for Carotenogenesis in Haloarchaea [PDF]
Molecules, 2020 Bacterioruberin and its derivatives have been described as the major carotenoids produced by haloarchaea (halophilic microbes belonging to the Archaea domain).
Micaela Giani +4 more
doaj +2 more sources
The Journal of Physical Chemistry B, 2017 Ultrafast photochemistry of pharaonis halorhodopsin (p-HR) in the intact membrane of Natronomonas pharaonis has been studied by photoselective femtosecond pump-hyperspectral probe spectroscopy with high time resolution. Two variants of this sample were studied, one with wild-type retinal prosthetic groups and another after shifting the retinal ...
Itay Gdor +4 more
openaire +3 more sources
Extreme halophilic Archaea: Halobacterium salinarum carotenoids characterization and antioxidant properties [PDF]
HeliyonImportant marine microorganisms are resources of renewable energy that may face global population growth and needs. The application of biomass metabolites, such as carotenoids and their derivatives, may solve some agro-food health problems. Herein, a new
Sana Ben Hamad Bouhamed +4 more
doaj +2 more sources
Expanding genomic resources for heritage science: characterization of selected microbial isolates from salt-weathered historic sites [PDF]
Frontiers in MicrobiologyIntroductionOn historic masonry and plaster, moisture-driven salt crystallization cycles impose mechanical stress and create niches for halophilic and halotolerant microbial communities. Halotolerant/halophilic microorganisms isolated from these man-made
Lukas Fürnwein +8 more
doaj +2 more sources