Results 71 to 80 of about 5,583 (160)

A Two‐Protein Chemoreceptor Complex Regulates Oxygen Thresholds in Bacterial Magneto‐Aerotaxis

Advanced Science, Volume 12, Issue 34, September 11, 2025.
Magnetotactic bacteria align with Earth's magnetic field, helping them migrate toward low‐oxygen environments. This study reveals how Magnetospirillum gryphiswaldense uses a specialized flavin adenine dinucleotide (FAD)‐dependent chemoreceptor, composed of two interacting proteins, for precise navigation in oxygen gradients.
Julian Herz, Carina Weigel, Leonie Scheder, Raz Zarivach, Itay Algov, Yonatan Chemla, Felix Popp, Cornelius Riese, Mohammad A. Charsooghi, Lital Alfonta, Michael M. Meijler, Dirk Schüler, Damien Faivre, Daniel Pfeiffer   +13 more
wiley   +1 more source

Structure of a halophilic nucleoside diphosphate kinase from Halobacterium salinarum [PDF]

FEBS Letters, 2005
Nucleoside diphosphate kinase from the halophilic archaeon Halobacterium salinarum was crystallized in a free state and a substrate‐bound form with CDP. The structures were solved to a resolution of 2.35 and 2.2 Å, respectively. Crystals with the apo‐form were obtained with His6‐tagged enzyme, whereas the untagged form was used for co‐crystallization ...
Besir, Hüseyin, Zeth, Kornelius, Bracher, Andreas, Heider, Ursula, Ishibashi, Matsujiro, Tokunaga, Masao, Oesterhelt, Dieter   +6 more
openaire   +3 more sources

Extracts from Microalgae and Archaea from the Andalusian Coast: A Potential Source of Antiproliferative, Antioxidant, and Preventive Compounds

Journal of Marine Science and Engineering
Marine and extreme environments harbor a huge diversity of microorganisms able to produce new bioactive metabolites with beneficial health effects. In this study, ethanol, aqueous, methanol, and acetone extracts and protein hydrolysates were obtained ...
Cristina Luque, Gloria Perazzoli, Patricia Gómez-Villegas, Javier Vigara, Rosario Martínez, Alejandro García-Beltrán, Jesús M. Porres, Jose Prados, Rosa León, Consolación Melguizo   +9 more
doaj   +1 more source

Two Decades of Optogenetic Tools: A Retrospective and a Look Ahead

Advanced Genetics, Volume 6, Issue 3, September 2025.
Optogenetics provides up to millisecond scale, cell type‐specific control of biology using light‐sensitive proteins. This review chronicles two decades of tool development, from microbial rhodopsins and photoactivated enzymes to allosteric switches, surveys broad applications in neuroscience, molecular and cell biology, cardiology, immunology, and ...
Xiao Duan, Mo Zhu, Shiqiang Gao
wiley   +1 more source

A Spotlight on Archaea in Humans, Livestock and Poultry: A Review

Veterinary Medicine and Science, Volume 11, Issue 2, March 2025.
The microbiota includes prokaryotes (archaea and bacteria) and eukaryotes. Archaea are single‐celled prokaryotes and essential part of gut microbiome. Researches on archaea in ruminants and humans are more than mono‐gastric. The low abundance of archaea in the gut depends on the method used (metagenomics or meta‐transcriptomic) and age of people or ...
Ahmad Salahi, Wafaa A. Abd El‐Ghany
wiley   +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, Nannan Yang, Shanfu Lu, Yan Xiang   +3 more
doaj   +1 more source

Chromatin and gene regulation in archaea

Molecular Microbiology, Volume 123, Issue 3, Page 218-231, March 2025.
Recent data from diverse archaea with different repertoires of nucleoid‐associated proteins show a common genome‐wide chromatin organisation where chromatin maintains access to gene promoters independently of transcription activity. Abstract The chromatinisation of DNA by nucleoid‐associated proteins (NAPs) in archaea ‘formats’ the genome structure in ...
Fabian Blombach, Finn Werner
wiley   +1 more source

Archaeal Signalling Networks—New Insights Into the Structure and Function of Histidine Kinases and Response Regulators of the Methanogenic Archaeon Methanosarcina acetivorans

Environmental Microbiology, Volume 27, Issue 2, February 2025.
Methanosarcina acetivorans possesses extensive signal transduction systems, including 53 histidine kinases and 15, mainly REC‐only, response regulators. All recombinant versions of representative kinase types except MA_type 2 showed autokinase activity.
Nora F. K. Georgiev, Anne L. Andersson, Zoe Ruppe, Loriana Kattwinkel, Nicole Frankenberg‐Dinkel   +4 more
wiley   +1 more source

The Function of Gas Vesicles in Halophilic Archaea and Bacteria: Theories and Experimental Evidence

Life, 2012
A few extremely halophilic Archaea (Halobacterium salinarum, Haloquadratum walsbyi, Haloferax mediterranei, Halorubrum vacuolatum, Halogeometricum borinquense, Haloplanus spp.) possess gas vesicles that bestow buoyancy on the cells. Gas vesicles are also
Aharon Oren
doaj   +1 more source

The RosR transcription factor is required for gene expression dynamics in response to extreme oxidative stress in a hypersaline-adapted archaeon

BMC Genomics, 2012
Background Previous work has shown that the hypersaline-adapted archaeon, Halobacterium salinarum NRC-1, is highly resistant to oxidative stress caused by exposure to hydrogen peroxide, UV, and gamma radiation.
Sharma Kriti, Gillum Nicholas, Boyd J, Schmid Amy   +3 more
doaj   +1 more source