@article{PAR00013189, title = {{C}aldisalinibacter kiritimatiensis gen. nov., sp. nov., a moderately thermohalophilic thiosulfate-reducing bacterium from a hypersaline microbial mat}, author = {{B}en {H}ania, {W}ajdi and {J}oseph, {M}anon and {F}iebig, {A}. and {B}unk, {B}. and {K}lenk, {H}. {P}. and {F}ardeau, {M}arie-{L}aure and {S}pring, {S}.}, editor = {}, language = {{ENG}}, abstract = {{A} novel anaerobic bacterium, designated {L}21-{TH}-{D}2({T}) was isolated from the anoxic zone of a microbial mat of the hypersaline {L}ake 21 on the {K}iritimati {A}toll ({R}epublic of {K}iribati, {C}entral {P}acific). {C}ells were {G}ram-positive, spore-forming and motile slender rods. {T}he novel strain grew anaerobically by fermentation at temperatures between 40 and 65 degrees {C} (optimum 50-55 degrees {C}) and at p{H} between 5-9 (optimum 6.9-7.0). {I}t required at least 20g {L}-1 {N}a{C}l for growth and tolerated up to 150g {L}-1 {N}a{C}l (optimum at 50g {L}-1). {I}n the presence of yeast extract or peptone the novel strain fermented glucose, fructose, maltose, mannose and pyruvate. {T}he end-products from glucose fermentation were acetate, ethanol, {CO}2 and {H}-2. {N}itrate, nitrite, elemental sulfur, sulfate, and sulfite were not used as electron acceptors, while thiosulfate was reduced to sulfide. {T}he cellular fatty acids pattern was dominated by iso-{C}15:0 and iso-{C}15:0 {DMA}. {T}he major polar lipids were identified as phosphatidylglycerol, phosphatidylethanolamine, an unidentified phospholipid and two different unidentified glycolipids. {N}o respiratory lipoquinones or cytochromes were detected. {T}he {DNA} {G} + {C} content was 30.7mol%. {T}he determined draft genome sequence of strain {L}21-{TH}-{D}2({T}) revealed a specialization on a saccharolytic fermentative metabolism. {B}esides enzymes for substrate-level phosphorylation, several membrane-bound enzyme complexes, like an ion-translocating {RNF} complex and an {F}-type {ATP} synthase, were annotated in the genome sequence and seem to be involved in the energy metabolism. {P}hylogenetic analyses based on a comparison of 16{S} r{RNA} gene sequences placed the novel isolate in a clade of anaerobic halophilic or thermohalophilic bacteria within the clostridial subcluster {XII}. {S}ignificant phenotypic and phylogenetic differences prevent inclusion of the novel isolate in existing genera within the family {C}lostridiaceae, so that the novel taxon {C}aldisalinibacter kiritimatiensis gen. nov., sp. nov., is proposed. {T}he type strain is {L}21-{TH}-{D}2({T}) (= {DSM} 26826({T}) = {JCM} 18664({T})).}, keywords = {biogeochemical cycling ; {K}iritimati {A}toll ; biofilm ; sediments ; biomineralization ; {PACIFIQUE} ; {MICRONESIE} ; {KIRIBATI} ; {KIRITIMATI} {ATOLL}}, booktitle = {}, journal = {{G}eomicrobiology {J}ournal}, volume = {32}, numero = {3-4}, pages = {347--354}, ISSN = {0149-0451}, year = {2015}, DOI = {10.1080/01490451.2013.866995}, URL = {https://www.documentation.ird.fr/hor/{PAR}00013189}, }