Results 1 to 10 of about 1,876 (158)

The Role of Tetraether Lipid Composition in the Adaptation of Thermophilic Archaea to Acidity [PDF]

Frontiers in Microbiology, 2013
Diether and tetraether lipids are fundamental components of the archaeal cell membrane. Archaea adjust the degree of tetraether lipid cyclization in order to maintain functional membranes and cellular homeostasis when confronted with pH and/or thermal ...
Eric eBoyd, Trinity eHamilton, Jinxiang eWang, Liu eHe, Chuanlun eZhang   +4 more
doaj   +7 more sources

First Isolation and Structure Elucidation of GDNT‐β‐Glu – Tetraether Lipid Fragment from Archaeal Sulfolobus Strains [PDF]

ChemistryOpen, 2021
Due to their special chemical structure, tetraether lipids (TEL) represent essential elements of archaeal membranes, providing these organisms with extraordinary properties.
Dr. Alexander Scholte, Christoph Hübner, Dr. Dieter Ströhl, Olaf Scheufler, Dr. Steffen Czich, Julia M. Börke, Dr. Gerhard Hildebrand, Prof. Dr. Klaus Liefeith   +7 more
doaj   +2 more sources

Biological Membranes in Extreme Conditions: Simulations of Anionic Archaeal Tetraether Lipid Membranes. [PDF]

PLoS ONE, 2016
In contrast to the majority of organisms that have cells bound by di-ester phospholipids, archaeal membranes consist of di- and tetraether phospholipids.
Luis Felipe Pineda De Castro, Mark Dopson, Ran Friedman   +2 more
doaj   +2 more sources

Novel Extended Tetraether Lipids Found in a High-CO₂ Geyser. [PDF]

Environ Microbiol
Characterisation of the archaeal lipidome of the CO2‐rich subsurface aquifer of the Geyser Andernach reveals novel extended tetraether lipids analogous to extended archaeols, likely produced by Candidatus Altiarchaeum, and potentially functioning as a membrane adaptation strategy to nutrient‐deprived conditions.
Groninga J, Wittig L, Bouderka F, Bornemann TLV, Lipp JS, Schubotz F, Keden S, Probst AJ, Hinrichs KU.   +8 more
europepmc   +2 more sources

Engineering archaeal membrane‐spanning lipid GDGT biosynthesis in bacteria: Implications for early life membrane transformations [PDF]

mLife
Eukaryotes are hypothesized to be archaeal–bacterial chimeras. Given the different chemical structures of membrane phospholipids in archaea and bacteria, transformations of membranes during eukaryogenesis that led to the bacterial‐type membranes of ...
Huahui Chen, Fengfeng Zheng, Xi Feng, Zijing Huang, Wei Yang, Chuanlun Zhang, Wenbin Du, Kira S. Makarova, Eugene V. Koonin, Zhirui Zeng   +9 more
doaj   +2 more sources

Environmental Controls on Crenarchaeol Distributions in Hydrothermal Springs [PDF]

Environ Microbiol
The optimal pH and temperature for crenarchaeol (a unique archaeal lipid) production in hydrothermal springs are 7.4°C and 46°C, respectively, which has important implications for archaeal evolution. Our study also indicates that pH is the most important environmental variable for archaeal lipid membrane compositions.
Calhoun A, Blewett J, Colman D, Amenabar M, Harris C, Boyd E, Pearson A, Leavitt W.   +7 more
europepmc   +2 more sources

Laurdan: Clarifying Photophysics and Advancing the Characterization of Extracellular Vesicles. [PDF]

Chemphyschem
Biophysical properties of extracellular vesicles (EVs) reflect their composition and membrane organization. We introduce a novel approach using time‐resolved emission spectra (TRES) phasor analysis of the polarity‐sensitive probe Laurdan to characterize membranes with complex compositions.
Riegerová P, Amaro M, Kapusta P, Vlček A, Smolko M, Souček K, Pospíchalová V, Hof M, Pokorná Š.   +8 more
europepmc   +2 more sources

Lipid hydrogen isotope compositions primarily reflect growth water in the model archaeon Sulfolobus acidocaldarius [PDF]

Applied and Environmental Microbiology
The stable hydrogen isotope composition (δ2H) of lipid biomarkers can track environmental processes and remain stable over geologically relevant time scales, enabling studies of past climate, hydrology, and ecology.
Carolynn M. Harris, Sebastian Kopf, Jeemin H. Rhim, Alec Cobban, Felix J. Elling, Xiahong Feng, Jamie McFarlin, Yuki Weber, Yujiao Zhang, Alice Zhou, Harpreet Batther, Ann Pearson, William D. Leavitt   +12 more
doaj   +2 more sources

A New Era for Using Natural Pigments: The Case of the C₅₀ Carotenoid Called Bacterioruberin. [PDF]

Biotechnol Appl Biochem
ABSTRACT Haloarchaea are extremophilic microorganisms belonging to the Archaea domain that require high salt concentrations to live, thus inhabiting ecosystems like salty ponds, salty marshes, or extremely salty lagoons. They are more abundant and widely distributed worldwide than initially expected.
Giani M, Valdés E, Miralles-Robledillo JM, Martínez G, Pire C, Martínez-Espinosa RM.   +5 more
europepmc   +2 more sources

The influence of near-surface sediment hydrothermalism on the TEX₈₆ tetraether-lipid-based proxy and a new correction for ocean bottom lipid overprinting [PDF]

Biogeosciences, 2022
The diversity and relative abundances of tetraether lipids produced by archaea and bacteria in soils and sediments are increasingly used to assess environmental change.
J. N. Bentley, G. T. Ventura, C. C. Walters, S. M. Sievert, J. S. Seewald   +4 more
doaj   +1 more source