Results 71 to 80 of about 17,342 (214)
Cryo-EM structures of the channelrhodopsin ChRmine in lipid nanodiscs
Nature Communications, 2022 ChRmine is a bacteriorhodopsin-like cation channelrhodopsin (BCCR). Here, the authors present cryo-EM structures of ChRmine in apo- and retinal-bound forms to provide insight into channel activity in a BCCR and facilitate engineering of ChRmine-based ...
Kyle Tucker +3 more
doaj +1 more source
Opsins are phospholipid scramblases in all domains of life
mBioOpsins are highly abundant retinal proteins in the membranes of photoheterotrophic bacteria. However, some microbial genomes encode an opsin but lack the gene for the final enzyme in retinal synthesis.
Zachary A. Maschmann +5 more
doaj +1 more source
Ion Transport of Biohybrid Asymmetric Membranes by pH and Light‐Cooperative Modulation
Advanced Materials Interfaces, 2020 Bacteriorhodopsin (bR) is an excellent light‐driven proton pump and plays a vital role in chemical and biological analytical processes, such as maintaining osmotic balance, intracellular acidity, and participating in photosynthesis.
Yujia Lv +3 more
doaj +1 more source
Acta Crystallographica Section D, Volume 82, Issue 5, Page 504-515, May 2026.Radiation‐induced changes during X‐ray crystallographic data collection can compromise concurrent spectroscopic studies. Suitable protocols to detect and identify spectral artefacts from crystallization buffers and cryoprotectants are essential for the reliable analysis of chromophoric ligands in macromolecules.Online UV–Vis absorption spectroscopy is ...
Jack Stubbs +8 more
wiley +1 more source
Life, 2016 We have explored the use of optical oxygen electrodes to study oxygenic photosynthesis and heterotrophic activities in crystallizer brines of the salterns in Eilat, Israel.
Aharon Oren
doaj +1 more source
Structural studies of bacteriorhodopsin in BC era
Biophysics and Physicobiology, 2023 It marked half a century since the discovery of bacteriorhodopsin two years ago. On this occasion, I have revisited historically important diffraction studies of this membrane protein, based on my recollections. X-ray diffraction and electron diffraction,
Mikio Kataoka
doaj +1 more source
Halide binding by the purified halorhodopsin chromoprotein. II. New chloride-binding sites revealed by 35Cl NMR [PDF]
, 1984 Halorhodopsin is a light-driven chloride pump in the cell membrane of Halobacterium halobium. Recently, a polypeptide of apparent Mr = 20,000 has been purified that contains the halorhodopsin chromophore.
Chan, Sunney I. +5 more
core
Chromophore equilibria in bacteriorhodopsin
Biophysical Journal, 1979 An investigation of the dark equilibria between different chromophores of bacteriorhodopsin (BR) and studies of the kinetics of their interconversion and photochemical activity have led to the following conclusions. (a) A component of the 605-nm chromophore of BR decays in the millisecond range and is likely to be identical to the intermediate O of the
Fischer, U., Oesterhelt, D.
openaire +2 more sources
ChemPhysChem, Volume 27, Issue 7, 14 April 2026.The microbial retinal protein KR2 (Krokinobacter eikastus) is a light‐driven outward Na+ pump, which is coupled to the photocycle of the chromophore. Using time‐resolved continuous‐wave pump‐probe resonance Raman spectroscopy, the operational switches for ion transport are identified, which are the transitions to a specific Schiff base sub‐state and ...
Anna Lena Schäfer +5 more
wiley +1 more source
Lipid composition of integral purple membrane by 1H and 31P NMR
Journal of Lipid Research, 2005 In the purple membrane (PM) of halobacteria, lipids stabilize the trimeric arrangement of bacteriorhodopsin (BR) molecules and mediate the packing of the trimers in a regular crystalline arrangement.
Christian Renner +2 more
doaj +1 more source