Complete genome sequence and description of Salinispira pacifica gen. nov., sp. nov., a novel spirochaete isolated form a hypersaline microbial mat

2.50
Hdl Handle:
http://hdl.handle.net/10033/620796
Title:
Complete genome sequence and description of Salinispira pacifica gen. nov., sp. nov., a novel spirochaete isolated form a hypersaline microbial mat
Authors:
Ben Hania, Wajdi; Joseph, Manon; Schumann, Peter; Bunk, Boyke; Fiebig, Anne; Spröer, Cathrin; Klenk, Hans-Peter; Fardeau, Marie-Laure; Spring, Stefan
Abstract:
Abstract During a study of the anaerobic microbial community of a lithifying hypersaline microbial mat of Lake 21 on the Kiritimati atoll (Kiribati Republic, Central Pacific) strain L21-RPul-D2T was isolated. The closest phylogenetic neighbor was Spirochaeta africana Z-7692T that shared a 16S rRNA gene sequence identity value of 90% with the novel strain and thus was only distantly related. A comprehensive polyphasic study including determination of the complete genome sequence was initiated to characterize the novel isolate. Cells of strain L21-RPul-D2T had a size of 0.2 – 0.25 × 8–9 μm, were helical, motile, stained Gram-negative and produced an orange carotenoid-like pigment. Optimal conditions for growth were 35°C, a salinity of 50 g/l NaCl and a pH around 7.0. Preferred substrates for growth were carbohydrates and a few carboxylic acids. The novel strain had an obligate fermentative metabolism and produced ethanol, acetate, lactate, hydrogen and carbon dioxide during growth on glucose. Strain L21-RPul-D2T was aerotolerant, but oxygen did not stimulate growth. Major cellular fatty acids were C14:0, iso-C15:0, C16:0 and C18:0. The major polar lipids were an unidentified aminolipid, phosphatidylglycerol, an unidentified phospholipid and two unidentified glycolipids. Whole-cell hydrolysates contained L-ornithine as diagnostic diamino acid of the cell wall peptidoglycan. The complete genome sequence was determined and annotated. The genome comprised one circular chromosome with a size of 3.78 Mbp that contained 3450 protein-coding genes and 50 RNA genes, including 2 operons of ribosomal RNA genes. The DNA G + C content was determined from the genome sequence as 51.9 mol%. There were no predicted genes encoding cytochromes or enzymes responsible for the biosynthesis of respiratory lipoquinones. Based on significant differences to the uncultured type species of the genus Spirochaeta, S. plicatilis, as well as to any other phylogenetically related cultured species it is suggested to place strain L21-RPul-D2T (=DSM 27196T = JCM 18663T) in a novel species and genus, for which the name Salinispira pacifica gen. nov., sp. nov. is proposed.
Citation:
Standards in Genomic Sciences. 2015 Feb 09;10(1):7
Issue Date:
9-Feb-2015
URI:
http://dx.doi.org/10.1186/1944-3277-10-7; http://hdl.handle.net/10033/620796
Type:
Journal Article
Appears in Collections:
publications of the department of molecular Infectionbiology (MIBI)

Full metadata record

DC FieldValue Language
dc.contributor.authorBen Hania, Wajdien
dc.contributor.authorJoseph, Manonen
dc.contributor.authorSchumann, Peteren
dc.contributor.authorBunk, Boykeen
dc.contributor.authorFiebig, Anneen
dc.contributor.authorSpröer, Cathrinen
dc.contributor.authorKlenk, Hans-Peteren
dc.contributor.authorFardeau, Marie-Laureen
dc.contributor.authorSpring, Stefanen
dc.date.accessioned2017-01-30T15:33:05Z-
dc.date.available2017-01-30T15:33:05Z-
dc.date.issued2015-02-09en
dc.identifier.citationStandards in Genomic Sciences. 2015 Feb 09;10(1):7en
dc.identifier.urihttp://dx.doi.org/10.1186/1944-3277-10-7en
dc.identifier.urihttp://hdl.handle.net/10033/620796-
dc.description.abstractAbstract During a study of the anaerobic microbial community of a lithifying hypersaline microbial mat of Lake 21 on the Kiritimati atoll (Kiribati Republic, Central Pacific) strain L21-RPul-D2T was isolated. The closest phylogenetic neighbor was Spirochaeta africana Z-7692T that shared a 16S rRNA gene sequence identity value of 90% with the novel strain and thus was only distantly related. A comprehensive polyphasic study including determination of the complete genome sequence was initiated to characterize the novel isolate. Cells of strain L21-RPul-D2T had a size of 0.2 – 0.25 × 8–9 μm, were helical, motile, stained Gram-negative and produced an orange carotenoid-like pigment. Optimal conditions for growth were 35°C, a salinity of 50 g/l NaCl and a pH around 7.0. Preferred substrates for growth were carbohydrates and a few carboxylic acids. The novel strain had an obligate fermentative metabolism and produced ethanol, acetate, lactate, hydrogen and carbon dioxide during growth on glucose. Strain L21-RPul-D2T was aerotolerant, but oxygen did not stimulate growth. Major cellular fatty acids were C14:0, iso-C15:0, C16:0 and C18:0. The major polar lipids were an unidentified aminolipid, phosphatidylglycerol, an unidentified phospholipid and two unidentified glycolipids. Whole-cell hydrolysates contained L-ornithine as diagnostic diamino acid of the cell wall peptidoglycan. The complete genome sequence was determined and annotated. The genome comprised one circular chromosome with a size of 3.78 Mbp that contained 3450 protein-coding genes and 50 RNA genes, including 2 operons of ribosomal RNA genes. The DNA G + C content was determined from the genome sequence as 51.9 mol%. There were no predicted genes encoding cytochromes or enzymes responsible for the biosynthesis of respiratory lipoquinones. Based on significant differences to the uncultured type species of the genus Spirochaeta, S. plicatilis, as well as to any other phylogenetically related cultured species it is suggested to place strain L21-RPul-D2T (=DSM 27196T = JCM 18663T) in a novel species and genus, for which the name Salinispira pacifica gen. nov., sp. nov. is proposed.en
dc.titleComplete genome sequence and description of Salinispira pacifica gen. nov., sp. nov., a novel spirochaete isolated form a hypersaline microbial maten
dc.typeJournal Articleen
dc.language.rfc3066enen
dc.rights.holderBen Hania et al.; licensee BioMed Central.en
dc.date.updated2015-09-04T08:26:43Zen
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