Results 51 to 60 of about 23,202 (197)

Biosynthesis of a linoleic acid allylic epoxide: mechanistic comparison with its chemical synthesis and leukotriene A biosynthesis[S]

Journal of Lipid Research, 2009
Biosynthesis of the leukotriene A (LTA) class of epoxide is a lipoxygenase-catalyzed transformation requiring a fatty acid hydroperoxide substrate containing at least three double bonds. Here, we report on biosynthesis of a dienoic analog of LTA epoxides
Katrin Niisuke, William E. Boeglin, John J. Murray, Claus Schneider, Alan R. Brash   +4 more
doaj   +1 more source

Nutrient disturbance in a shallow aquaculture pond impacts Microcystis gene expression but does not impact bacterial community function during bloom conditions

Journal of Phycology, EarlyView.
Abstract Cyanobacterial harmful algal blooms (cHABs) are worldwide issues. Reduced nitrogen forms (ammonium and urea) have recently been measured in freshwater systems at concentrations not previously recorded. These reduced nitrogen forms have been shown to favor the proliferation of harmful cyanobacteria.
Matthew F. Gladfelter, Hunter R. Baylous, Alan E. Wilson, Morgan M. Steffen   +3 more
wiley   +1 more source

Description of Flavicapitulum gen. nov. and two new species of Marmoreocelis from thermal habitats in the Americas

Journal of Phycology, EarlyView.
Abstract Three novel taxa in the Coleofasciculales were observed in hot springs in Yellowstone National Park, Wyoming, United States, and in the Tabaconcito thermal springs on the Rio Tabacón in Costa Rica. Flavicapitulum vaporiphilum gen. et sp. nov. was located in a supported clade with Gracilinea and Marmoreocelis.
Jeffrey R. Johansen, Jan Pokorný, Radka Hauerová, Jan Kaštovský   +3 more
wiley   +1 more source

A novel covalent modification of nitrogenase in a cyanobacterium

FEBS Letters, 2000
In extracts of the unicellular cyanobacterium Gloeothece, the Fe‐protein of nitrogenase can be separated by SDS–PAGE into two antigenically identifiable components. Unlike the situation in photosynthetic bacteria such as Rhodospirillum rubrum, these two forms do not arise from covalent modification of the protein by ADP‐ribosylation.
Gallon, John R., Cheng, Jiujun, Dougherty, Lisa J., Gallon, Victoria A., Hilz, Helmuth, Pederson, Dennis M., Richards, Helen M., Rüggeberg, Sabrina, Smith, Christopher J.   +8 more
openaire   +2 more sources

A Phosphorylation‐Dependent Partner‐Switching‐Like Module Regulates a Glycosyltransferase Required for Heterocyst Polysaccharide Layer Formation in Anabaena sp. Strain PCC 7120

Molecular Microbiology, EarlyView.
The glycosyltransferase All4160 is regulated by the reversible phosphorylation of Ser74. The kinase Alr3423 phosphorylates and inactivates All4160, while the SpoIIE‐like phosphatase HenR restores its activity through dephosphorylation. A nonphosphorylatable variant of All4160 bypasses the need for HenR, which demonstrates that a phosphorylation ...
Mai Harada, Satoshi Matsuoka, Shigeki Ehira   +2 more
wiley   +1 more source

Recombinant Expression and Purification of the Cyanobacterial Chaperone HtpG from Synechococcus elongatus PCC 7942

Methods and Protocols
The 90 kDa Heat Shock Protein (Hsp90) is an essential and highly conserved molecular chaperone that supports the folding and maturation of a diverse array of client proteins across prokaryotic and eukaryotic organisms.
Liqun Jiang, Ibrahim D. Boyenle, Nicolas Delaeter, Yanxin Liu   +3 more
doaj   +1 more source

Diel Infection of a Cyanobacterium by a Contractile Bacteriophage [PDF]

Applied and Environmental Microbiology, 2005
ABSTRACT Light was found to strongly influence the infection of a freshwater cyanobacterium ( Synechococcus elongatus PCC 7942) by a contractile DNA phage named AS-1. Phage progeny production was correlated with the amount of light in the laboratory and occurred in a diel pattern under natural light.
C Cheng, Kao, Susan, Green, Barry, Stein, Susan S, Golden   +3 more
openaire   +2 more sources

Photosynthetic glyceraldehyde 3‐phosphate dehydrogenase B is present in the last common ancestor of Viridiplantae predating the Streptophyta–Chlorophyta split

New Phytologist, EarlyView.
Predicted evolutionary history of GAPA (blue squares), CP12 (red circles), and GAPB (represented as a fusion of a blue square and half red circle) across the Viridiplantae.
Alex P. Mann, James E. M. Stach, Maxim V. Kapralov, Patricia E. Lopez‐Calcagno   +3 more
wiley   +1 more source

Structural Analyses of Polysaccharides Extracted from Cyanobacterial Extracellular Gels and Oriented Liquid Crystalline Microfiber Processing by Poly(vinyl alcohol)-Assisted Electrospinning

Gels
Sacran is a supergiant cyanobacterial polysaccharide that forms mesogenic supercoil rods that exhibit liquid crystalline (LC) gels at deficient concentrations of around 0.5 wt%, and has several bioactive stimuli-responsive functions.
Chizu Mitani, Maiko Okajima, Tomomi Ohashira, Mohammad Asif Ali, Toshiaki Taniike, Tatsuo Kaneko   +5 more
doaj   +1 more source

Effects of Cylindrospermopsin Producing Cyanobacterium and Its Crude Extracts on a Benthic Green Alga—Competition or Allelopathy?

Marine Drugs, 2015
Cylindrospermopsin (CYN) is a toxic secondary metabolite produced by filamentous cyanobacteria which could work as an allelopathic substance, although its ecological role in cyanobacterial-algal assemblages is mostly unclear.
Viktória B-Béres, Gábor Vasas, Dalma Dobronoki, Sándor Gonda, Sándor Alex Nagy, István Bácsi   +5 more
doaj   +1 more source