Publications

properties of r-citramalyl-coenzyme a lyase and its role in the autotrophic 3-hydroxypropionate cycle of chloroflexus aurantiacus.	the autotrophic co(2) fixation pathway (3-hydroxypropionate cycle) in chloroflexus aurantiacus results in the fixation of two molecules of bicarbonate into one molecule of glyoxylate. glyoxylate conversion to the co(2) acceptor molecule acetyl-coenzyme a (coa) requires condensation with propionyl-coa (derived from one molecule of acetyl-coa and one molecule of co(2)) to beta-methylmalyl-coa, which is converted to citramalyl-coa. extracts of autotrophically grown cells contained both s- and r-cit ...	2007	17259315
characterization of a marine gammaproteobacterium capable of aerobic anoxygenic photosynthesis.	members of the gammaproteobacterial clade nor5/om60 regularly form an abundant part, up to 11%, of the bacterioplankton community in coastal systems during the summer months. here, we report the nearly complete genome sequence of one cultured representative, congregibacter litoralis strain kt71, isolated from north sea surface water. unexpectedly, a complete photosynthesis superoperon, including genes for accessory pigments, was discovered. it has a high sequence similarity to bac clones from mo ...	2007	17299055
novel halophilic aerobic anoxygenic phototrophs from a canadian hypersaline spring system.	the first enumeration of cultivable obligately aerobic phototrophic bacteria from a terrestrial saline spring was accomplished in the east german creek system (salinity approximately 6%), near lake winnipegosis, manitoba, canada. occurring at densities up to 3.3x10(7) cfu/ml of sample, aerobic phototrophs comprised 15-36% of the total cultivable bacterial population in the diatom- and chlorophyte-dominated aerobic microbial mats. many of the representative strains isolated for phenotypic charact ...	2008	18385928
biogeography and phylogeny of the nor5/om60 clade of gammaproteobacteria.	the phylogeny, abundance, and biogeography of the nor5/om60 clade was investigated. this clade includes "congregibacter litoralis" strain kt71, the first cultured representative of marine aerobic anoxygenic phototrophic gammaproteobacteria. more than 500 16s rrna sequences affiliated with this clade were retrieved from public databases. by comparative sequence analysis, 13 subclades could be identified, some of which are currently restricted to discrete habitat types. almost all sequences in the ...	2009	19216045
the photosynthetic apparatus and its regulation in the aerobic gammaproteobacterium congregibacter litoralis gen. nov., sp. nov.	there is accumulating evidence that in some marine environments aerobic bacteriochlorophyll a-producing bacteria represent a significant part of the microbial population. the interaction of photosynthesis and carbon metabolism in these interesting bacteria is still largely unknown and requires further investigation in order to estimate their contribution to the marine carbon cycle.	2009	19287491
novel tn4371-ice like element in ralstonia pickettii and genome mining for comparative elements.	integrative conjugative elements (ices) are important factors in the plasticity of microbial genomes. an element related to the ice tn4371 was discovered during a bioinformatic search of the ralstonia pickettii 12j genome. this element was analysed and further searches carried out for additional elements.a pcr method was designed to detect and characterise new elements of this type based on this scaffold and a culture collection of fifty-eight ralstonia pickettii and ralstonia insidiosa strains ...	2009	19941653
haliea mediterranea sp. nov., a marine gammaproteobacterium.	strain 7sm29t, an aerobic marine gammaproteobacterium isolated from seawater from castellón, spain, was characterized by classical phenotyping, chemotaxonomy and 16s rrna gene sequence analysis. strain 7sm29t was found to be closely related to strains in the genus haliea and to congregibacter litoralis kt71t, with which a genus-level cluster was formed within the nor5/om60 clade of the gammaproteobacteria. strain 7sm29t was a short, motile rod with a tuft of three polar flagella. the strain grew ...	2010	19767360
chromocurvus halotolerans gen. nov., sp. nov., a gammaproteobacterial obligately aerobic anoxygenic phototroph, isolated from a canadian hypersaline spring.	a strain eg19(t) of aerobic bacteria able to form pleomorphic cells was isolated from a brine spring runoff stream in the west central region of the province of manitoba, canada. the pale pinkish purple strain contained bacteriochlorophyll a incorporated into light-harvesting i and reaction center complexes. its inability to grow under anaerobic illuminated conditions prompted designation as a member of the functional group known as aerobic anoxygenic phototrophic bacteria. phylogenetic analysis ...	2011	21479531
genome sequence of strain imcc3088, a proteorhodopsin-containing marine bacterium belonging to the om60/nor5 clade.	strain imcc3088, cultivated from the yellow sea, is a novel isolate belonging to the om60/nor5 clade and is closely related to clone om241, congregibacter litoralis, and strain htcc2080. here the genome sequence of strain imcc3088 is presented, showing the absence of photosynthetic gene clusters and the presence of proteorhodopsin.	2011	21551310
co-assimilation of organic substrates via the autotrophic 3-hydroxypropionate bi-cycle in chloroflexus aurantiacus.	chloroflexus aurantiacus is a facultative autotrophic green non-sulfur bacterium that grows phototrophically in thermal springs and forms microbial mats with cyanobacteria. cyanobacteria produce glycolate during the day (photorespiration) and excrete fermentation products at night. c. aurantiacus uses the 3-hydroxypropionate bi-cycle for autotrophic carbon fixation. this pathway was supposed to be also suited for the co-assimilation of various organic substrates like glycolate, acetate, propiona ...	2011	21764971