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Wednesday, July 8, 2020 | History

2 edition of I. An acyltransferase from the cyanobacterium Anabaena variabilis found in the catalog.

I. An acyltransferase from the cyanobacterium Anabaena variabilis

Amittha Wickrema

I. An acyltransferase from the cyanobacterium Anabaena variabilis

II. Complete nucleotide sequence of a small plasmid from the cyanobacterium Plectonema boryanum

by Amittha Wickrema

  • 384 Want to read
  • 2 Currently reading

Published .
Written in English

    Subjects:
  • Anabaena,
  • Plectonema boryanum,
  • Acyltransferases,
  • Nucleotide sequence,
  • Cyanobacteria,
  • Plasmids -- Genetics

  • Edition Notes

    Other titlesAcyltransferase from the cyanobacterium Anabaena variabilis, Complete nucleotide sequence of a small plasmid from the cyanobacterium Plectonema boryanum
    Statementby Amittha Wickrema
    The Physical Object
    Paginationvi, 68 leaves :
    Number of Pages68
    ID Numbers
    Open LibraryOL14651742M

    Anabaena oryzae,Anabaena variabilis,and Tolypothrix ceytonica Mixed domestic-industrial wastewater Organic matter, copper, and zinc [ ] Synechocystis sp. PUPCCC Synthetic insecticide solution Chlorpyrifos [ ] Westiellopsis proli ca,Nostoc hatei,and Anabaena sphaerica Synthetic insecticide solution Carbofuran, chlorpyrifos, and endosulfan [ ]. Heterocysts are differentiated cyanobacterial cells whose principal known function is the fixation of dinitrogen (N2), an oxygen (O2)-sensitive process, under aerobic conditions. Cyclic AMP, which plays a role in signal transduction in prokaryotes as well as eukaryotes, is present in Anabaena sp., is responsive to nitrogen deprivation, and can disrupt the normal pattern of heterocyst formation.

    Braune W () Structural aspects of akinete germination in the cyanobacterium Anabaena variabilis. Arch Microbiol – Google Scholar Braune W, Doehler G () 15 N-uptake, influenced by UV-B radiation, and pattern of amino-acid pools during akinete germination in Anabaena variabilis (Cyanobacteria). The cyanobacterium Anabaena variabilis Kütz. from the University of Lodz culture collection grown on BG11 medium (A TCC Medium ) (Rippka et al. ) was used in this research.

    The examples of nitrogen-fixing, hydrogen-producing cyanobacteria include nonmarine Anabaena species; marine species of Anabaena, such as Anabaena cylindrica, Anabaena variabilis, A. variabilis PK84, and Anabaena AMC ; marine cyanobacteria in the genera Calothrix, Oscillatoria, Gloebacter PCC, and Synechococcus PCC; and the marine. Disclaimer: ITIS taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. However, it is not a legal authority for statutory or regulatory purposes. While every effort has been made to provide the most reliable and up-to-date information available, ultimate legal requirements with respect to species are contained in.


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I. An acyltransferase from the cyanobacterium Anabaena variabilis by Amittha Wickrema Download PDF EPUB FB2

Anabaena sp. strain PCC is a filamentous cyanobacterium commonly used as a model organism for studying cyanobacterial cell differentiation and nitrogen fixation. For many decades, this cyanobacterium was considered an obligate photo-lithoautotroph. We now discovered that this strain is also capable of mixotrophic, photo-organoheterotrophic, and chemo-organoheterotrophic growth if Cited by:   Abstract Membranes isolated from the cyanobacterium, Anabaena variabilis, and washed free of soluble endogenous constituents, were capable of catalyzing the direct transfer of the acyl group from acyl-acyl-carrier protein to an endogenous lysomonogalactosyldiacylglycerol to form by: 6.

Elhai J, Wolk CP. Developmental regulation and spatial pattern of expression of the structural genes for nitrogenase in the cyanobacterium Anabaena. EMBO J. Oct; 9 (10)– [PMC free article] Ernst A, Reich S, Böger P. Modification of dinitrogenase reductase in the cyanobacterium Anabaena variabilis due to C starvation and by:   Light-induced acidification by the cyanobacterium Anabaena variabilis is biphasic (a fast phase I and slow phase II) and shown to be sodium-dependent with an optimum concentration of 40 to 60 millimolar Na+.

Cells grown under low CO2 concentrations at pH 9 (i.e. mainly HCO3− present in the medium) exhibited the slow phase II of proton efflux only, while cells grown under low CO2 Cited by: The filamentous cyanobacterium Anabaena variabilis ATCC fixes nitrogen under aerobic conditions in specialized cells called heterocysts that form in response to an environmental deficiency in combined nitrogen.

Nitrogen fixation is mediated by the enzyme nitrogenase, which is very sensitive to oxygen. Heterocysts are microxic cells that allow nitrogenase to function in a filament Cited by: Abstract. Apart from the conventional, Mo-containing nitrogenase, the cyanobacterium Anabaena variabilis can express at least two alternative N 2-fixing enzyme cyanobacterium grows with V in a Mo-deficient medium.

The nitrogenase then expressed reduces C 2 H 2 partly beyond C2H4 to C 2 H 6 and produces more H 2 than the Mo-enzyme (Kentemich et al., ; Yakunin et al., ). In vitro fatty acid transfer to form complex lipids was observed in crude cell extracts of Anabaena variabilis using [C]palmitoyl-acyl carrier protein, [C]stearoyl-acyl carrier protein, and [C]oleoyl-acyl carrier protein substrates.

The data indicated that there was a rapid transfer of the fatty acids into the complex lipids. The greatest amount of radioactivity was observed in the. The rate of adaptation of high CO2 (5% v/v CO2 in air)-grown Anabaena to a low level of CO2 (% v/v in air) was determined as a function of O2 concentration.

Exposure of cells to low (%) O2 concentration resulted in an extended lag in the adaptation to low CO2 concentration. The rate of adaptation following the lag was not affected by the concentration of O2. The nitrogenase gene cluster in cyanobacteria has been thought to comprise multiple operons; however, in Anabaena variabilis, the promoter for the first gene in the cluster, nifB1, appeared to be the primary promoter for the entire nif cluster.

The structural genes nifHDK1 were the most abundant transcripts; however, their abundance was not controlled by an independent nifH1 promoter, but. Shinorine, produced by the cyanobacterium Anabaena variabilis, has been commercialized as an active ingredient in sunscreen creams under the trade name Helioguard and Helionori and are available in the global market (Katoch et al., ; Chrapusta et al., ).

Both the products show high antiaging activity and the formulation exhibits. Which would be the most likely host of an enveloped virus. Anabaena variabilis (cyanobacterium). Bacillus subtilis (Gram-positive bacterium).

Culex quinquefasciatus (mosquito). Zea mays (corn). Stapleton SR and Jaworski JG (a) Characterization of fatty acid biosynthesis in the cyanobacterium Anabaena variabilis. Biochim Biophys Acta – CrossRef Google Scholar Stapleton SR and Jaworski JG (b) Characterization and purification of malonyl-coenzyme A: [acyl-carrier-protein] transacylases from spinach and Anabaena.

Over 2 billion years ago, with the growth of large numbers of O2-producing cyanobacteria, our planet emerged from anaerobiosis. The cyanobacteria needed only light, water, and inorganic nutrients, with CO2 as a carbon source, to replicate.

Numerous genes have been identified that are required specifically for synthesis and deposition of heterocyst envelope glycolipids and polysaccharide. The nature of the inorganic carbon (Ci) species actively taken up by cyanobacteria CO2 or HCO3− has been investigated.

The kinetics of CO2 uptake, as well as that of HCO3− uptake, indicated the involvement of a saturable process. The apparent affinity of the uptake mechanism for CO2 was higher than that for HCO3−. Though the calculated V max was the same in both cases, the maximum rate.

Anabaena variabilis ATCC is a heterotrophic, nitrogen-fixing cyanobacterium containing both a Mo-dependent nitrogenase encoded by the nif genes and V-dependent nitrogenase encoded by the vnf genes. The nifB, nifS, and nifU genes of A.

variabilis were cloned, mapped, and partially sequenced. The fdxN gene was between nifB and nifS. Metabolic studies of taurine utilization in intact Anabaena variabilis cells suggests possible reduction of a sulfonate group to a thiol group.

11 No evidence for a trithionate pathway 5° is avail- able to date, although a thiosulfate reductase has been demonstrated in Plectonema. 17 39 A. Schmidt and U. Christen, Planta(). 4o A. Abstract. In vitro fatty acid transfer to form complex lipids was observed in crude cell extracts of Anabaena variabilis using [ C]palmitoyl-acyl carrier protein, [ C]stearoyl-acyl carrier protein, and [ C]oleoyl-acyl carrier protein substrates.

The data indicated that there was a rapid transfer of the fatty acids into the complex lipids. The greatest amount of radioactivity was. In vitro fatty acid synthesis was examined in crude cell extracts, soluble fractions, and 80% (NH4)2SO4 fractions from Anabaena variabilis M3.

Fatty acid synthesis was absolutely dependent upon acyl carrier protein and required NADPH and NADH. Moreover, fatty acid synthesis and elongation occurred in the cytoplasm of the cell. The major fatty acid products were palmitic acid () and stearic.

Chen, H.H.; Wickrema, A.; Jaworski, J.G.: Acyl-acyl-carrier protein: lysomo-nogalactosyldiacylglycerol acyltransferase from the cyanobacterium Anabaena variabilis. Most of the information about heterocyst development to date is based on the study of three species of heterocyst-forming filamentous cyanobacteria: Anabaena (also Nostoc) sp.

strain PCCA. variabilis ATCCand Nostoc punctiforme ATCC This chapter focuses on those genes involved in signaling and regulation.

HetR plays a central role in heterocyst development and pattern. Gerhard Heussipp, in Handbook of Proteolytic Enzymes (Third Edition), Name and History. So far only two bacterial proteases have been described that belong to subfamily S8B, PrcA of Anabaena variabilis, and HreP of Yersinia was identified in the cyanobacterium A.

variabilis as a Ca 2+-dependent intracellular was supposed that PrcA participates in the.Mixts. of 3 strains of Cyanobacteria (Anabaena sp. Trebon, Microcystis aeruginosa MKRAnabaena variabilis) and 2 com. biostimulators were added to .Cossar JD, Darling AJ, Ip SM, Rowell P and Stewart WDP (a) Immunocytochemical localization of thioredoxins in the cyanobacteria Anabaena cylindrica and Anabaena variabilis.

J .