Results 51 to 60 of about 4,854 (164)

Archaeal Tetraether Lipids as Tracers for Past Marine Environmental Change

open access: yesPaleoceanography and Paleoclimatology, Volume 41, Issue 7, July 2026.
Abstract Archaea are single‐celled microorganisms that are abundant in marine environments and play a key role in the carbon and nitrogen cycles. Archaea can biosynthesize a wide variety of isoprenoid membrane lipids, including isoprenoid glycerol dibiphytanyl glycerol tetraethers (isoGDGTs).
Felix J. Elling   +39 more
wiley   +1 more source

Complex Effects of Cytochrome P450 Monooxygenase on Purple Membrane and Bacterioruberin Production in an Extremely Halophilic Archaeon: Genetic, Phenotypic, and Transcriptomic Analyses

open access: yesFrontiers in Microbiology, 2018
Halophilic archaea are known to produce a diverse array of pigments for phototrophy and photoprotection. The aim of this paper was to determine the role of a Halobacterium gene encoding the predicted cytochrome P450 monooxygenase (CYP174A1) in pigment ...
Walter J. Müller   +4 more
doaj   +1 more source

Scotty: lattice coincidences in the Protein Data Bank

open access: yesActa Crystallographica Section D, Volume 82, Issue 7, Page 824-835, July 2026.
Scotty supports crystallographic comparisons of lattice coincidences, the interpretation of oligomeric assemblies and paracrystallinity.The application Scotty, implemented within the Phasertng codebase, was used to perform a PDB‐wide analysis of lattice coincidences.
Airlie J. McCoy   +3 more
wiley   +1 more source

A Novel Polyphosphate‐Degrading Enzyme Confers Growth on Exogenous Polyphosphate in the Archaeon Haloferax volcanii

open access: yesEnvironmental Microbiology, Volume 28, Issue 7, July 2026.
A novel polyP‐degrading enzyme with an activity differing from those currently known was found in Haloferax volcanii, conferring the ability for this microbe to grow on extracellular polyP. These findings further our understanding of the potential ecological roles of polyP and how archaea metabolise this essential biopolymer.
Jack W. F. Nicholls   +4 more
wiley   +1 more source

The astrobiological potential of halophilic archaea [PDF]

open access: yes, 2016
The universe we know is a hostile place and currently we only know one planet that harbors life: Earth. Most of the extant life on Earth thrives in moderate environmental conditions, however, over the last decades extreme environments have been shown to harbor a great diversity of life.
Leuko, Stefan, Rettberg, Petra
openaire   +2 more sources

A Genetic Investigation of the KEOPS Complex in Halophilic Archaea

open access: yesPLoS ONE, 2012
KEOPS is an important cellular complex conserved in Eukarya, with some subunits conserved in Archaea and Bacteria. This complex was recently found to play an essential role in formation of the tRNA modification threonylcarbamoyladenosine (t(6)A), and was previously associated with telomere length maintenance and transcription.
Adit Naor   +6 more
openaire   +4 more sources

Test for the Production and Assay of the Proteolytic Activities of Halophilic Bacteria and Archaea Isolated from Algerian Hypersaline Environments

open access: yesProceedings, 2020
: The present work was carried out on 133 halophilic strains isolated on MGM (Modified Growth Medium) medium with 12 and 23% (w/v) of salt. A screening of the extracellular proteolytic activities, carried out on the same medium supplemented with casein ...
Hania Benmebarek   +3 more
doaj   +1 more source

Beyond PEGylation: Archaeal Lipids for Long‐Circulating Liposomes

open access: yesAdvanced NanoBiomed Research, Volume 6, Issue 6, June 2026.
Archaeal lipid‐based liposomes, particularly those containing caldarchaeol (GDGT), were found to significantly prolong the circulation time of vancomycin in rats, matching the pharmacokinetic properties of PEGylated systems. These findings suggest archaeal lipids as promising non‐PEG excipients for parenteral applications to minimize drug clearance ...
Viktor Sedlmayr   +9 more
wiley   +1 more source

Isocitrate lyase activity in halophilic archaea [PDF]

open access: yesFEMS Microbiology Letters, 1995
Eight species of halophilic Archaea were tested for the presence of isocitrate lyase activity. High activities (up to 100 nmol min−1 mg protein−1) were detected in Haloferax mediterranei and Haloferax volcanii when grown in medium containing acetate as the principal carbon source. Little activity was found in representatives of the genera Halobacterium
Aharon Oren, Peter Gurevich
openaire   +1 more source

Unraveling the 13C Hyperfine Structure of the 5‐Deazaflavin Radical in Solution Using Photo‐CIDNP Spectroscopy

open access: yesChemPhotoChem, Volume 10, Issue 6, June 2026.
The 13C hyperfine structure of the 5‐deazaflavin radical is elucidated by photo‐chemically induced dynamic nuclear polarization spectroscopy and compared to the flavin radical. Despite structural similarity to flavins, 5‐deazaflavins were long thought to act only as two‐electron transfer agents.
Sabrina Panter   +6 more
wiley   +1 more source

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