Find your PDFs fast.
Welcome to the Pubget Medical Subject Headings (MESH) browser. Click on a topic or subtopic below to explore related papers. In the gold box is the most recent paper about the current MESH term, and below are 20 related papers.
Chlorobi (1):
Recent article
Chlorobi
Photosynthesis Research (100)2 2009
Abstract
A mutant devoid of cytochrome c-554 (CT0075) in Chlorobium tepidum (syn. Chlorobaculum tepidum) exhibited a decreased growth rate but normal growth yield when compared to the wild type. From quantitative determinations of sulfur compounds in media, the mutant was found to oxidize thiosulfate more sl...
|
PMID: 19421892
PDF is available here.
PDF is available here.
| < More recent | Older article > |
Photosynthesis Research (100)2 2009
Abstract
We have collected a 1.3 A X-ray diffraction dataset of the FMO from Prosthecochloris aestuarii 2K, which has allowed us to identify an additional Bacteriochlorophyll-a molecule with chemical attachments to both sides of the central magnesium atom. A new analysis of the previously published X-ray dat...
|
PMID: 19437128
PDF is available here.
PDF is available here.
Abstract
We present here a genome-based survey of the distribution and phylogenies of genes involved in oxidation of sulfur compounds in these strains. It is evident from biochemical and genetic analyses that the dissimilatory sulfur metabolism of these organisms is very complex and incompletely understood....
|
PMID: 18929068
PDF is available here.
PDF is available here.
Abstract
We determined Fe(II) oxidation rates depending on pH, temperature, light intensity, and Fe(II) concentration for three phylogenetically different phototrophic Fe(II)-oxidizing strains (purple nonsulfur bacterium Rhodobacter ferrooxidans sp. strain SW2, purple sulfur bacterium Thiodictyon sp. strain...
|
PMID: 18811650
PDF is available here.
PDF is available here.
Abstract
We find a populous assemblage of anoxygenic phototrophic green sulfur bacteria (GSB). These GSB represent a large component of the Lake Matano phototrophic community, and bacteriochlorophyll e, a pigment produced by low-light-adapted GSB, is nearly as abundant as chlorophyll a in the lake's euphotic...
|
PMID: 18838679
PDF is available here.
PDF is available here.
Journal of Biological Chemistry (283)41 2008
Abstract
We investigated the activities of all three chelatase complexes from the green sulfur bacterium Chlorobaculum tepidum and interactions with the next enzyme in the pathway, magnesium protoporphyrin IX methyltransferase (BchM). Although all three chelatase complexes insert magnesium into protoporphyri...
|
PMID: 18693239
PDF is available here.
PDF is available here.
Environmental Microbiology (10)10 2008
Abstract
The consortium 'Chlorochromatium aggregatum' currently represents the most highly developed interspecific association between prokaryotes. It consists of green sulfur bacteria, so-called epibionts, which surround a central, motile, chemotrophic bacterium. Four putative symbiosis genes of the epibion...
|
PMID: 18707609
PDF is available here.
PDF is available here.
Journal of Bacteriology (190)19 2008
Abstract
The cyclization of lycopene to gamma- or beta-carotene is a major branch point in the biosynthesis of carotenoids in photosynthetic bacteria. Four families of carotenoid cyclases are known, and each family includes both mono- and dicyclases, which catalyze the formation of gamma- and beta-carotene,...
|
PMID: 18676669
PDF is available here.
PDF is available here.
Abstract
We have synthesized different self-assemblies of BChl c mimics having the same functional groups as the natural counterparts, that is, a hydroxyethyl substituent, a carbonyl group and a divalent metal atom ligated by a tetrapyrrole. These artificial BChl mimics have been shown by single crystal x-ra...
|
PMID: 18755898
PDF is available here.
PDF is available here.
Photosynthesis Research (96)3 2008
Abstract
Molecular mechanics calculations and exciton theory have been used to study pigment organization in chlorosomes of green bacteria. Single and double rod, multiple concentric rod, lamella, and Archimedean spiral macrostructures of bacteriochlorophyll c molecules were created and their spectral proper...
|
PMID: 18443917
PDF is available here.
PDF is available here.
Journal of Bacteriology (190)10 2008
Abstract
The phototrophic consortium "Chlorochromatium aggregatum" currently represents the most highly developed interspecific association of bacteria and consists of green sulfur bacteria, so-called epibionts, surrounding a central, motile, chemotrophic bacterium. In order to identify subcellular structure...
|
PMID: 18344357
PDF is available here.
PDF is available here.
Abstract
Our results suggest that a considerable fraction of green sulfur bacterial chemofossils did not originate in a low-light marine chemocline environment and therefore were likely to have an allochthonous origin. Thus, analysis of subfossil DNA sequences permits a more differentiated interpretation and...
|
PMID: 18039829
PDF is available here.
PDF is available here.
Photosynthesis Research (95)2-3 2008
Abstract
We have previously used a simple approach [Adolphs and Renger (2006) Biophys J 91:2778-2797] to study the shift in local transition energies (site energies) of the FMO protein of Prosthecochloris aestuarii by charged amino acid residues, assuming a standard protonation pattern of the titratable grou...
|
PMID: 17917787
PDF is available here.
PDF is available here.
Mikrobiologiia (77)2 2008
Abstract
Mikrobiologiia (77)1 2008
Abstract
The investigated green sulfur bacterium, strain M, was isolated from a sulfidic spring on the Black Sea Coast of the Caucasus. The cells of strain M are straight or curved rods 0.6-0.9 x 1.8-4.2 microm in size. According to the cell wall structure, the bacteria are gram-negative. Chlorosomes are loc...
|
PMID: 18365725
PDF is available here.
PDF is available here.
Journal of Bacteriology (190)2 2008
Abstract
The Chlorobaculum tepidum genome contains two paralogous genes, CT2256 and CT1232, whose products are members of the FixC dehydrogenase superfamily and have sequence similarity to geranylgeranyl reductases. Each gene was insertionally inactivated, and the resulting mutants were characterized. CT2256...
|
PMID: 17993528
PDF is available here.
PDF is available here.
Abstract
The soxB gene encodes the SoxB component of the periplasmic thiosulfate-oxidizing Sox enzyme complex, which has been proposed to be widespread among the various phylogenetic groups of sulfur-oxidizing bacteria (SOB) that convert thiosulfate to sulfate with and without the formation of sulfur globule...
|
PMID: 17991026
PDF is available here.
PDF is available here.
Abstract
We present a combined quantum chemical/electrostatic approach to compute site energies that considers the whole protein in atomic detail and provides the missing link between crystallography and spectroscopy. The calculation of site energies of the Fenna-Matthews-Olson protein results in optical spe...
|
PMID: 17940020
PDF is available here.
PDF is available here.
Microbiology (153)Pt 10 2007
Abstract
I and II, with the proteins of lineage II (Chlorobiaceae and others) in closer affiliation to the enzymes of the sulfate-reducing prokaryotes (SRP). This clustering is discordant with the dissimilatory sulfite reductase (DsrAB) phylogeny and indicates putative lateral aprBA gene transfer from SRP to...
|
PMID: 17906146
PDF is available here.
PDF is available here.
Journal of Bacteriology (189)17 2007
Abstract
We propose that they catalyze the methyl group transfers. bchQ, bchR, and bchQ bchR mutants of C. tepidum were constructed and characterized. The bchQ mutant produced BChl c that was not methylated at C-8(2), the bchR mutant produced BChl c that was not methylated at C-12(1), and the double mutant p...
|
PMID: 17586634
PDF is available here.
PDF is available here.
Abstract
We show the potential of flow cytometry as a fast tool for population identification and enumeration of photosynthetic sulfur bacteria. Purple (PSB) and green sulfur bacteria (GSB) oxidize hydrogen sulfide to elemental sulfur that can act as storage compound to be further oxidized to sulfate generat...
|
PMID: 17635543
PDF is available here.
PDF is available here.
Biochimica et Biophysica Acta (1767)6 2007
Abstract
I and purple bacterial reaction centres of Rhodobacter sphaeroides wild type. The donor in RCs of green sulfur bacteria clearly differs from the substantially asymmetric special pair of purple bacteria and appears to be similar to the more symmetric donor of photosystem I....
|
PMID: 17292850
PDF is available here.
PDF is available here.
FEBS Letters (581)9 2007
Abstract
Substituent-dependent demetalation kinetics of natural bacteriochlorophyll (BChl) c and e homologs purified from two green sulfur photosynthetic bacteria was first studied. Separated BChl e homologs, which possessed a formyl group at the 7-position of their chlorin macrocycles, exhibited a significa...
|
PMID: 17434497
PDF is available here.
PDF is available here.
Abstract
We extend previous two-dimensional electronic spectroscopy investigations of the FMO bacteriochlorophyll complex, and obtain direct evidence for remarkably long-lived electronic quantum coherence playing an important part in energy transfer processes within this system. The quantum coherence manifes...
|
PMID: 17429397
PDF is available here.
PDF is available here.
Abstract
Abstract
The potential of microbial mats to develop sulfide-oxidizing biofims was explored. A bioreactor specially designed for the treatment of sulfide-containing effluents was inoculated with a microbial-mat sample, and a complex microbial biofilm with sulfide-oxidation activity developed. The microbial co...
|
PMID: 17407058
PDF is available here.
PDF is available here.
Abstract
We investigated the importance of this basic segment and of several residues of the signature for the function of sigmaA. We have shown that the conserved residues Phe-61 and Lys-265, located in the core binding and DNA binding subregions 2.1 and 4.2, respectively, are critical for full function of...
|
PMID: 17150963
PDF is available here.
PDF is available here.
Abstract
We searched for fossil 16S rRNA gene sequences of green sulfur bacteria employing ancient DNA methodology. 540 bp-long fossil sequences could indeed be amplified from up to 217 000-year-old sapropels. In addition, such sequences were also recovered from carbon-lean intermediate sediment layers depos...
|
PMID: 17227428
PDF is available here.
PDF is available here.
Abstract
We investigated the genotypic diversity of oxygenic and anoxygenic phototrophic microorganisms in microbial mat samples collected from three hot spring localities on the east coast of Greenland. These hot springs harbour unique Arctic microbial ecosystems that have never been studied in detail befor...
|
PMID: 17227409
PDF is available here.
PDF is available here.
Abstract
Systematic blast searches were performed on each open reading frame in the genomes of Porphyromonas gingivalis W83, Bacteroides fragilis YCH46, B. thetaiotaomicron VPI-5482, Gramella forsetii KT0803, Chlorobium luteolum (formerly Pelodictyon luteolum) DSM 273 and Chlorobaculum tepidum (formerly Chlo...
|
PMID: 17488508
PDF is available here.
PDF is available here.
Abstract
Whereas the N-terminal module of Tic62 is highly conserved among all oxyphototrophs, the C-terminal region (FNR-binding module) is only found in vascular plants. Phylogenetic analyses classify four Tic62-NAD(P)-related protein subfamilies in land plants, closely related to members from cyanobacteria...
|
PMID: 17374152
PDF is available here.
PDF is available here.
Mikrobiologiia (76)4 2007
Abstract
The anoxygenic phototrophic bacterial community of the brackish meromictic Lake Shira (Khakassia) was investigated in August 2001, July 2002, and February-March 2003. In all the periods of investigation, the prevailing microorganisms were purple sulfur bacteria similar to Lamprocystis purpurea in mo...
|
PMID: 17974211
PDF is available here.
PDF is available here.
Abstract
I in cyanobacteria and higher plants. Therefore, they all belong to the so-called type 1 RCs, in contrast to the type 2 RCs of purple bacteria and photosystem II containing quinone molecules. Although the architecture of the heliobacterial RC as a protein complex is still unknown, it forms a homodim...
|
PMID: 16842023
PDF is available here.
PDF is available here.
Abstract
Communities of green sulfur bacteria were studied in selected marine and saline habitats on the basis of gene sequences of 16S rRNA and the Fenna- Matthews-Olson (FMO) protein. The availability of group-specific primers for both 16S rDNA and the fmoA gene, which is unique to green sulfur bacteria, h...
|
PMID: 17236159
PDF is available here.
PDF is available here.
Trends in Microbiology (14)11 2006
Abstract
We present examples that reflect recent advances in phototroph biology as a result of insights from genome and metagenome sequencing....
|
PMID: 16997562
PDF is available here.
PDF is available here.
Biophysical Journal (91)8 2006
Abstract
A simple electrostatic method for the calculation of optical transition energies of pigments in protein environments is presented and applied to the Fenna-Matthews-Olson (FMO) complex of Prosthecochloris aestuarii and Chlorobium tepidum. The method, for the first time, allows us to reach agreement b...
|
PMID: 16861264
PDF is available here.
PDF is available here.
Scientific American (295)4 2006
Abstract
Abstract
The community structure and composition of marine microbial biofilms established on glass surfaces was investigated across three differentially contaminated Antarctic sites within McMurdo Sound. Diverse microbial communities were revealed at all sites using fluorescence in situ hybridization (FISH)...
|
PMID: 16817926
PDF is available here.
PDF is available here.
Abstract
Hydrogenation processes leading from biomolecules to fossil biomarkers in anoxic sediments are crucial for the preservation of organic matter. However, these processes are still poorly understood. The present identification of several reduced carotenoids in recent sediments attests that these proces...
|
PMID: 16690819
PDF is available here.
PDF is available here.
Abstract
We describe the determination of their stereochemistries to be 13(2)-(R)-, 17-(S)- and 18-(S)-configurations by using 1H-1H NOE correlations in 1H-NMR and circular dichroism spectra as well as chemical modification of Chl-a to produce stereochemically defined Chl derivatives. In the second part of t...
|
PMID: 16520864
PDF is available here.
PDF is available here.
Bioconjugate Chemistry (17)4 2006
Abstract
Naturally occurring bacteriochlorophyll(BChl)s-c, -d, and -e from green sulfur photosynthetic bacteria were self-assembled in an aqueous solution in the presence of octadecyltriethoxysilane and tetraethoxysilane, followed by polycondensation of the alkoxysilanes by incubation for 50 h at 25 degrees...
|
PMID: 16848406
PDF is available here.
PDF is available here.
Abstract
The biomass, phylogenetic composition, and photoautotrophic metabolism of green sulfur bacteria in the Black Sea was assessed in situ and in laboratory enrichments. In the center of the western basin, bacteriochlorophyll e (BChl e) was detected between depths of 90 and 120 m and reached maxima of 54...
|
PMID: 16332785
PDF is available here.
PDF is available here.
Abstract
Phototrophic consortia represent valuable model systems for the study of signal transduction and coevolution between different bacteria. The phototrophic consortium "Chlorochromatium aggregatum" consists of a colorless central rod-shaped bacterium surrounded by about 20 green-pigmented epibionts. Al...
|
PMID: 16269785
PDF is available here.
PDF is available here.
Abstract
We present hydrocarbon biomarkers (molecular fossils) from a 1.64-Gyr-old basin in northern Australia, revealing the ecological structure of mid-Proterozoic marine communities. The biomarkers signify a marine basin with anoxic, sulphidic, sulphate-poor and permanently stratified deep waters, hostile...
|
PMID: 16208367
PDF is available here.
PDF is available here.
Abstract
Population analyses in water samples obtained from the chemocline of crenogenic, meromictic Lake Cadagno, Switzerland, in October for the years 1994 to 2003 were studied using in situ hybridization with specific probes. During this 10-year period, large shifts in abundance between purple and green s...
|
PMID: 16000760
PDF is available here.
PDF is available here.
Abstract
Abstract
We describe the isolation and cultivation of a previously unknown green sulfur bacterial species from a deep-sea hydrothermal vent, where the only source of light is geothermal radiation that includes wavelengths absorbed by photosynthetic pigments of this organism....
|
PMID: 15967984
PDF is available here.
PDF is available here.
Abstract
Our results indicate that the natural diversity in the ecosystem studied has been significantly underestimated in the past and point out the presence of novel species not related to all known purple sulfur bacteria. Furthermore, the detection of green sulfur bacteria, after only an initial step of e...
|
PMID: 16329919
PDF is available here.
PDF is available here.
Abstract
Our evidence for widespread photiczone euxinic conditions suggests that sulfide toxicity was a driver of the extinction and a factor in the protracted recovery....
|
PMID: 15661975
PDF is available here.
PDF is available here.
Abstract
The effects of acetate and propionate on the performance of a recently proposed and characterized photosynthetic biological sulfide removal system have been investigated with a view to predicting this concept's suitability for removing sulfide from wastewater undergoing or having undergone anaerobic...
|
PMID: 15584053
PDF is available here.
PDF is available here.
Mikrobiologiia (74)3 2005
Abstract
The structure of the phototrophic community found in Lake Khilganta (the Agin-Buryat Autonomous Area), a shallow saline soda lake (depth, 35-45 cm; water mineralization, 45 g/l; alkalinity, 30 mg-equiv/l; pH 9.5) has been studied. The bottom of the lake is covered with a 10- to 15-mm microbial mat,...
|
PMID: 16119856
PDF is available here.
PDF is available here.
Abstract
Motile phototrophic consortia are highly regular associations in which numerous cells of green sulfur bacteria surround a flagellated colorless beta-proteobacterium in the center. To date, seven different morphological types of such consortia have been described. In addition, two immotile associatio...
|
PMID: 15294820
PDF is available here.
PDF is available here.
Abstract
Vertical distributions of dominant bacterial populations in saline meromictic Lake Kaiike were investigated throughout the water column and sediment by quantitative oligonucleotide probe membrane hybridization. Three oligonucleotide probes specific for the small-subunit (SSU) rRNA of three groups of...
|
PMID: 15294833
PDF is available here.
PDF is available here.
Microbiology (150)Pt 8 2004
Abstract
Members of the Chlorobiaceae and Chloroflexaceae are unique among the phototrophic micro-organisms in having a remarkably rich chlorophyll pigment diversity. The physiological regulation of this diversity and its ecological implications are still enigmatic. The bacteriochlorophyll composition of the...
|
PMID: 15289552
PDF is available here.
PDF is available here.
Journal of Bacteriology (186)16 2004
Abstract
Abstract
Recommended standards for the description of new species of the anoxygenic phototrophic bacteria are proposed in accordance with Recommendation 30b of the International Code of Nomenclature of Bacteria. These standards include information on the natural habitat, ecology and phenotypic properties inc...
|
PMID: 15280323
PDF is available here.
PDF is available here.
Abstract
The performance of a sulfide-removal system based on biofilms dominated by green sulfur bacteria (GSB) has been investigated. The system was supplied with radiant energy in the band 720-780 nm, and fed with a synthetic wastewater. The areal net sulfide removal rate and the efficacy of the incident r...
|
PMID: 15211484
PDF is available here.
PDF is available here.
The phylogeny and signature sequences characteristics of Fibrobacteres, Chlorobi, and Bacteroidetes.
Abstract
Fibrobacteres, Chlorobi, and Bacteroidetes (FCB group) comprise three main bacterial phyla recognized on the basis of 16S rRNA trees. Presently, there are no distinctive biochemical or molecular characteristics known that can distinguish these bacteria from other bacterial phyla. The relationship of...
|
PMID: 15239383
PDF is available here.
PDF is available here.
Abstract
The enormous amount of hydrogen sulfide (up to 11 mg/ml) is present in the Yavoriv sulfur deposit reservoirs owing to sulfur reductive bacteria activity. As a consequence the ecological situation is badly affected and requires recovering. The biological H2S decomposition by photosynthetic sulfur bac...
|
PMID: 15104050
PDF is available here.
PDF is available here.
Abstract
The feasibility of using photosynthetic sulfide-oxidizing bacteria to remove sulfide from wastewater in circumstances where axenic cultures are unrealistic has been completely reconsidered on the basis of known ecophysiological data, and the principles of photobioreactor and chemical reactor enginee...
|
PMID: 14705011
PDF is available here.
PDF is available here.