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van Vliet DM, Lin Y, Bale NJ, Koenen M, Villanueva L, Stams AJM, Sánchez-Andrea I. Pontiella desulfatans gen. nov., sp. nov., and Pontiella sulfatireligans sp. nov., Two Marine Anaerobes of the Pontiellaceae fam. nov. Producing Sulfated Glycosaminoglycan-like Exopolymers. Microorganisms 2020; 8:microorganisms8060920. [PMID: 32570748 PMCID: PMC7356697 DOI: 10.3390/microorganisms8060920] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/11/2020] [Accepted: 06/16/2020] [Indexed: 12/16/2022] Open
Abstract
Recently, we isolated two marine strains, F1T and F21T, which together with Kiritimatiella glycovorans L21-Fru-ABT are the only pure cultures of the class Kiritimatiellae within the phylum Verrucomicrobiota. Here, we present an in-depth genome-guided characterization of both isolates with emphasis on their exopolysaccharide synthesis. The strains only grew fermentatively on simple carbohydrates and sulfated polysaccharides. Strains F1T, F21T and K. glycovorans reduced elemental sulfur, ferric citrate and anthraquinone-2,6-disulfonate during anaerobic growth on sugars. Both strains produced exopolysaccharides during stationary phase, probably with intracellularly stored glycogen as energy and carbon source. Exopolysaccharides included N-sulfated polysaccharides probably containing hexosamines and thus resembling glycosaminoglycans. This implies that the isolates can both degrade and produce sulfated polysaccharides. Both strains encoded an unprecedently high number of glycoside hydrolase genes (422 and 388, respectively), including prevalent alpha-L-fucosidase genes, which may be necessary for degrading complex sulfated polysaccharides such as fucoidan. Strain F21T encoded three putative glycosaminoglycan sulfotransferases and a putative sulfate glycosaminoglycan biosynthesis gene cluster. Based on phylogenetic and chemotaxonomic analyses, we propose the taxa Pontiella desulfatans F1T gen. nov., sp. nov. and Pontiella sulfatireligans F21T sp. nov. as representatives of the Pontiellaceae fam. nov. within the class Kiritimatiellae.
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Affiliation(s)
- Daan M. van Vliet
- Laboratory of Microbiology, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands; (D.M.v.V.); (A.J.M.S.)
| | - Yuemei Lin
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands;
| | - Nicole J. Bale
- Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ) and Utrecht University, Landsdiep 4, 1797 SZ ’t Horntje (Texel), The Netherlands; (N.J.B.); (M.K.); (L.V.)
| | - Michel Koenen
- Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ) and Utrecht University, Landsdiep 4, 1797 SZ ’t Horntje (Texel), The Netherlands; (N.J.B.); (M.K.); (L.V.)
| | - Laura Villanueva
- Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ) and Utrecht University, Landsdiep 4, 1797 SZ ’t Horntje (Texel), The Netherlands; (N.J.B.); (M.K.); (L.V.)
| | - Alfons J. M. Stams
- Laboratory of Microbiology, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands; (D.M.v.V.); (A.J.M.S.)
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Irene Sánchez-Andrea
- Laboratory of Microbiology, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands; (D.M.v.V.); (A.J.M.S.)
- Correspondence: ; Tel.: +31-317-483486
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Knobloch S, Daussin A, Jóhannsson R, Marteinsson V. Pelagibaculum spongiae gen. nov., sp. nov., isolated from a marine sponge in South-West Iceland. Int J Syst Evol Microbiol 2019; 69:2129-2134. [PMID: 31120827 DOI: 10.1099/ijsem.0.003448] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-negative, motile, mesophilic, aerobic, rod-shaped bacterium, designated Hp12T, was isolated from a marine sponge in the intertidal zone off the coast of Seltjarnarnes (64° 16' N 22° 00' W), Iceland. Strain Hp12T grew optimally at 20-22 °C, at pH 7-8 and in the presence of 1-2 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences placed strain Hp12T in the class Gammaproteobacteria, related to members of the genus Alcanivorax in the order Oceanospirillales with 90.3-88.5 % sequence similarity. The strain had a draft genome size of 4.99 Mbp with a DNA G+C content of 43.0 mol%. Cellular fatty acids were dominated by C16 : 1 ω7c, C18 : 1 ω7c and C16 : 0. The predominant polar lipids were phosphatidylglycerol and phosphatidylethanolamine. The major respiratory lipoquinones were ubiquinone Q8 and menaquinone MK8. From the taxonomic information and phenotypic properties obtained in this study, it is proposed that strain Hp12T be placed into a novel genus and species named Pelagibaculum spongiae gen. nov., sp. nov. The type strain of Pelagibaculum spongiae is Hp12T (=DSM 104963T=CECT 9367T).
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Affiliation(s)
- Stephen Knobloch
- 2Faculty of Life and Environmental Sciences, University of Iceland, 101 Reykjavík, Iceland.,1Microbiology Group, Department of Research and Innovation, Matís ohf., 113 Reykjavik, Iceland
| | | | - Ragnar Jóhannsson
- 4Marine and Freshwater Research Institute, Hafrannsóknastofnun, 101 Reykjavik, Iceland
| | - Viggó Marteinsson
- 1Microbiology Group, Department of Research and Innovation, Matís ohf., 113 Reykjavik, Iceland.,5Faculty of Food Science and Nutrition, University of Iceland, 101 Reykjavik, Iceland
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3
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Bale NJ, Sorokin DY, Hopmans EC, Koenen M, Rijpstra WIC, Villanueva L, Wienk H, Sinninghe Damsté JS. New Insights Into the Polar Lipid Composition of Extremely Halo(alkali)philic Euryarchaea From Hypersaline Lakes. Front Microbiol 2019; 10:377. [PMID: 30930858 PMCID: PMC6423904 DOI: 10.3389/fmicb.2019.00377] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 02/13/2019] [Indexed: 12/14/2022] Open
Abstract
We analyzed the polar membrane lipids of 13 strains of halo(alkali)philic euryarchaea from hypersaline lakes. Nine belong to the class Halobacteria, representing two functional groups: aerobic polysaccharide utilizers and sulfur-respiring anaerobes. The other four strains represent halo(alkali)philic methanogens from the class Methanomicrobia and a recently discovered class Methanonatronarchaeia. A wide range of polar lipids were detected across the 13 strains including dialkyl glycerol diethers (archaeols), membrane-spanning glycerol tetraethers and diether-based cardiolipins. The archaeols contained a range of core lipid structures, including combinations of C20 and C25 isoprenoidal alkyl chains, unsaturations, and hydroxy moieties. Several diether lipids were novel, including: (a) a phosphatidylglycerolhexose (PG-Gly) headgroup, (b) a N,N,N-trimethyl aminopentanetetrol (APT)-like lipid with a methoxy group in place of a hydroxy group on the pentanetetrol, (c) a series of polar lipids with a headgroup with elemental composition of either C12H25NO13S or C12H25NO16S2, and (d) novel cardiolipins containing a putative phosphatidylglycerolphosphate glycerophosphate (PGPGP) polar moiety. We found that the lipid distribution of the 13 strains could be generally separated into two groups, the methanogens (group) and the Halobacteria (class) based on the presence of specific core lipids. Within the methanogens, adaption to a high or more moderate salt concentration resulted in different ratios of glycerol dialkyl glycerol tetraethers (GDGTs) to archaeol. The methanogen Methanosalsum natronophilum AME2T had the most complex diether lipid composition of any of the 13 strains, including hydroxy archaeol and macrocyclic archaeol which we surmise is an order-specific membrane adaption. The zwitterionic headgroups APT and APT-Me were detected only in the Methanomicrobiales member Methanocalculus alkaliphilus AMF2T which also contained the highest level of unsaturated lipids. Only alkaliphilic members of the Natrialbales order contained PGPGP cardiolipins and the PG-Gly headgroup. The four analyzed neutrophilic members of the Halobacteria were characterized by the presence of sulfur-containing headgroups and glycolipids. The presence of cardiolipins with one or more i-C25 alkyl chains, generally termed extended archaeol (EXT-AR), in one of the Methanonatronarchaeia strains was unexpected as only one other order of methanogenic archaea has been reported to produce EXT-AR. We examined this further by looking into the genomic potential of various archaea to produce EXT-AR.
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Affiliation(s)
- Nicole J. Bale
- Department of Marine Microbiology and Biogeochemistry, NIOZ Royal Institute for Sea Research, Utrecht University, Texel, Netherlands
| | - Dimitry Y. Sorokin
- Research Centre of Biotechnology, Winogradsky Institute of Microbiology, Russian Academy of Sciences, Moscow, Russia
- Department of Biotechnology, Faculty of Applied Sciences, Delft University of Technology, Delft, Netherlands
| | - Ellen C. Hopmans
- Department of Marine Microbiology and Biogeochemistry, NIOZ Royal Institute for Sea Research, Utrecht University, Texel, Netherlands
| | - Michel Koenen
- Department of Marine Microbiology and Biogeochemistry, NIOZ Royal Institute for Sea Research, Utrecht University, Texel, Netherlands
| | - W. Irene C. Rijpstra
- Department of Marine Microbiology and Biogeochemistry, NIOZ Royal Institute for Sea Research, Utrecht University, Texel, Netherlands
| | - Laura Villanueva
- Department of Marine Microbiology and Biogeochemistry, NIOZ Royal Institute for Sea Research, Utrecht University, Texel, Netherlands
| | - Hans Wienk
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Jaap S. Sinninghe Damsté
- Department of Marine Microbiology and Biogeochemistry, NIOZ Royal Institute for Sea Research, Utrecht University, Texel, Netherlands
- Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Utrecht, Netherlands
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4
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Carlson RP, Oshota O, Shipman M, Caserta JA, Hu P, Saunders CW, Xu J, Jay ZJ, Reeder N, Richards A, Pettigrew C, Peyton BM. Integrated molecular, physiological and in silico characterization of two Halomonas isolates from industrial brine. Extremophiles 2016; 20:261-74. [PMID: 26888357 DOI: 10.1007/s00792-015-0806-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 12/06/2015] [Indexed: 01/15/2023]
Abstract
Two haloalkaliphilic bacteria isolated from industrial brine solutions were characterized via molecular, physiological, and in silico metabolic pathway analyses. Genomes from the organisms, designated Halomonas BC1 and BC2, were sequenced; 16S ribosomal subunit-based phylogenetic analysis revealed a high level of similarity to each other and to Halomonas meridiana. Both strains were moderate halophiles with near optimal specific growth rates (≥60 % μ max) observed over <0.1-5 % (w/v) NaCl and pH ranging from 7.4 to 10.2. Isolate BC1 was further characterized by measuring uptake or synthesis of compatible solutes under different growth conditions; in complex medium, uptake and accumulation of external glycine betaine was observed while ectoine was synthesized de novo in salts medium. Transcriptome analysis of isolate BC1 grown on glucose or citrate medium measured differences in glycolysis- and gluconeogenesis-based metabolisms, respectively. The annotated BC1 genome was used to build an in silico, genome-scale stoichiometric metabolic model to study catabolic energy strategies and compatible solute synthesis under gradients of oxygen and nutrient availability. The theoretical analysis identified energy metabolism challenges associated with acclimation to high salinity and high pH. The study documents central metabolism data for the industrially and scientifically important haloalkaliphile genus Halomonas.
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Affiliation(s)
- Ross P Carlson
- Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT, 59717, USA. .,Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA.
| | - Olusegun Oshota
- Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT, 59717, USA.,Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Matt Shipman
- Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT, 59717, USA.,U.S. Navy, Washington, DC, USA
| | | | - Ping Hu
- Procter and Gamble Co., Cincinnati, OH, 45202, USA
| | | | - Jun Xu
- Procter and Gamble Co., Cincinnati, OH, 45202, USA
| | - Zackary J Jay
- Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT, 59717, USA.,Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
| | - Nancy Reeder
- Procter and Gamble Co., Cincinnati, OH, 45202, USA
| | - Abigail Richards
- Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT, 59717, USA.,Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA
| | | | - Brent M Peyton
- Department of Chemical and Biological Engineering, Montana State University, Bozeman, MT, 59717, USA. .,Center for Biofilm Engineering, Montana State University, Bozeman, MT, 59717, USA.
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5
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Hoffmann A, Kovermann M, Oberwinkler T, Siedler F, Cortina NS, Balbach J, Oesterhelt D. Novel sulfated phosphoglycolipids from Natronomonas moolapensis. Chem Phys Lipids 2015; 191:8-15. [PMID: 26134137 DOI: 10.1016/j.chemphyslip.2015.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 06/22/2015] [Accepted: 06/23/2015] [Indexed: 01/09/2023]
Abstract
Polar lipid pattern determination is often used for the taxonomic classification of halophilic Archaea in addition to a genomic characterization. During the analysis of polar lipid extracts from the recently described haloarchaeon Natrononomonas moolapensis, an unknown glycolipid was detected. Fragmentation patterns observed from preliminary mass spectrometric analysis initially suggested the presence of a sulfo-hexosyl-phosphatidylglycerol. However, by NMR spectroscopy and enzymatic assays the existence of two isomeric molecules with different hexoses (1-(6-sulfo-d-glcp/galf-β1,2-glycero)-phospho-2,3-diphytanylglycerol) could be shown. The structural origin from phosphatidylglycerol distinguishes these glycolipids within Archaea, because all other characterized haloarchaeal glycolipids consist of diphytanylglycerol directly linked to an oligoglycosyl moiety. Now the door is open to investigate the physical and functional consequences of these architectural differences of the head groups.
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Affiliation(s)
- Andreas Hoffmann
- Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany
| | - Michael Kovermann
- Institute of Physics, Martin Luther University Halle-Wittenberg, Betty-Heimann-Str. 7, 06120 Halle, Germany; Department of Chemistry, Umeå University, 90187 Umeå, Sweden
| | - Tanja Oberwinkler
- Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany
| | - Frank Siedler
- Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany
| | - Niña Socorro Cortina
- Institute of Organic Chemistry and Chemical Biology, Goethe University, Max-von-Laue-Str. 15, 60438 Frankfurt, Germany
| | - Jochen Balbach
- Institute of Physics, Martin Luther University Halle-Wittenberg, Betty-Heimann-Str. 7, 06120 Halle, Germany
| | - Dieter Oesterhelt
- Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany
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6
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Banskota AH, Stefanova R, Sperker S, Lall SP, Craigie JS, Hafting JT, Critchley AT. Polar lipids from the marine macroalga Palmaria palmata inhibit lipopolysaccharide-induced nitric oxide production in RAW264.7 macrophage cells. PHYTOCHEMISTRY 2014; 101:101-8. [PMID: 24569177 DOI: 10.1016/j.phytochem.2014.02.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 01/11/2014] [Accepted: 02/03/2014] [Indexed: 05/05/2023]
Abstract
The EtOAc soluble fraction of a MeOH/CHCl3 extract of Palmaria palmata showed strong nitric oxide (NO) inhibitory activity against lipopolysaccharide (LPS)-induced NO production in murine RAW264.7 cells. NO inhibition-guided isolation led to identification of three new polar lipids including a sulfoquinovosyl diacylglycerol (SQDG) (2S)-1-O-eicosapentaenoyl-2-O-myristoyl-3-O-(6-sulfo-α-D-quinovopyranosyl)-glycerol (1) and two phosphatidylglycerols, 1-O-eicosapentaenoyl-2-O-trans-3-hexadecenoyl-3-phospho-(1'-glycerol)-glycerol (3) and 1-O-eicosapentaenoyl-2-O-palmitoyl-3-phospho-(1'-glycerol)-glycerol (4) from the EtOAc fraction. Seven known lipids were also isolated including a SQDG (2), a phospholipid (5) and five galactolipids (6-10). Structures of the isolated lipids were elucidated by spectral analyses. The isolated SQDGs, phosphatidylglycerols and phospholipid possessed strong and dose-dependent NO inhibitory activity compared to N(G)-methyl-L-arginine acetate salt (L-NMMA), a well-known NO inhibitor used as a positive control. Further study suggested that these polar lipids suppressed NO production through down-regulation of inducible nitric oxide synthase (iNOS).
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Affiliation(s)
- Arjun H Banskota
- Aquatic and Crop Resource Development, National Research Council Canada, 1411 Oxford Street, Halifax, Nova Scotia B3H 3Z1, Canada.
| | - Roumiana Stefanova
- Aquatic and Crop Resource Development, National Research Council Canada, 1411 Oxford Street, Halifax, Nova Scotia B3H 3Z1, Canada
| | - Sandra Sperker
- Aquatic and Crop Resource Development, National Research Council Canada, 1411 Oxford Street, Halifax, Nova Scotia B3H 3Z1, Canada
| | - Santosh P Lall
- Aquatic and Crop Resource Development, National Research Council Canada, 1411 Oxford Street, Halifax, Nova Scotia B3H 3Z1, Canada
| | - James S Craigie
- Aquatic and Crop Resource Development, National Research Council Canada, 1411 Oxford Street, Halifax, Nova Scotia B3H 3Z1, Canada
| | - Jeff T Hafting
- Acadian Seaplants Limited, 30 Brown Avenue, Dartmouth, Nova Scotia B3B 1X8, Canada
| | - Alan T Critchley
- Acadian Seaplants Limited, 30 Brown Avenue, Dartmouth, Nova Scotia B3B 1X8, Canada
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Raab A, Newcombe C, Pitton D, Ebel R, Feldmann J. Comprehensive analysis of lipophilic arsenic species in a brown alga (Saccharina latissima). Anal Chem 2013; 85:2817-24. [PMID: 23394220 DOI: 10.1021/ac303340t] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Approaches for the unambiguous identification of lipophilic arsenic species in Saccharina latissima (sugar kelp) have been studied. Parallel use of high resolution ICPMS and electrospray ionization (ESI)-MS after separation revealed that Saccharina latissima contained three distinct classes of lipophilic As-species, a family of arsenic containing phospholipids (AsPL), all including As in the form of As-sugar-PO4, As-containing hydrocarbons (AsHC), and As-containing polyunsaturated fatty acids (AsFA). For detailed identification, the use of phospholipases, in particular phospholipase A2, was essential to define the fatty acid composition (determination of regioisomers) of the lipids without purification of the sample, while fragmentation of the molecules by MS(2) measurements alone did not supply this information. Some of the identified AsPL contained unsaturated fatty acids (C16:1, C18:1 to C18:3), but saturated fatty acids dominated the AsPL. The fatty acid bound to the position 2″ was predominantly C16:0. Complete lipid hydrolysis showed that this alga did not contain arsenic containing fatty acids (AsFA) bound to complex lipids. Our investigations indicate that in addition to RP-HPLC-ICPMS/ESI-MS a range of different derivatization methods should be used for the comprehensive identification of unknown lipid-soluble arsenic compounds.
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Affiliation(s)
- Andrea Raab
- TESLA (Trace Element Speciation Laboratory), Department of Chemistry, Meston Walk, University of Aberdeen, Aberdeen AB24 3UE, Scotland, United Kingdom
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Halomonas smyrnensis sp. nov., a moderately halophilic, exopolysaccharide-producing bacterium. Int J Syst Evol Microbiol 2013; 63:10-18. [DOI: 10.1099/ijs.0.037036-0] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Four Gram-negative, moderately halophilic, exopolysaccharide-producing strains, designated AAD6T, AAD4, AAD17 and AAD21, were isolated from Çamaltı Saltern Area, a wildlife reserve in Sasalı, İzmir province located in the Aegean Region of Turkey. The isolates grew at an optimum NaCl concentration of 10 % (w/v). The major cellular fatty acids were C16 : 0, C18 : 1ω7c, C16 : 1ω7c and C12 : 0 3OH, respectively and the predominant lipoquinone was ubiquinone Q-9. The G+C content of the genomic DNA of strains AAD6T, AAD4, AAD17 and AAD21 was 63.0, 63.3, 62.8 and 62.6 mol%, respectively. Comparative 16S rRNA gene sequence studies showed that the isolates belonged to the genus
Halomonas
. The DNA–DNA hybridization mean values between the representative strain AAD6T and the closely related species
Halomonas salina
DSM 5928T,
Halomonas halophila
DSM 4770T,
Halomonas maura
DSM 13445T,
Halomonas organivorans
DSM 16226T,
Halomonas elongata
DSM 2581T,
Halomonas koreensis
JCM 12237T and
Halomonas nitroreducens
LMG 24185, were 40.8, 39.6, 24.2, 23.3, 12.6, 14.5 and 12.2 %, respectively. Based on these data the strains represent a novel species of the genus
Halomonas
for which the name Halomonas smyrnensis sp. nov. is proposed. The type strain is AAD6T ( = DSM 21644T = JCM 15723T).
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Properties of sesame oil by detailed 1H and 13C NMR assignments before and after ozonation and their correlation with iodine value, peroxide value, and viscosity measurements. Chem Phys Lipids 2009; 163:148-56. [PMID: 19900426 DOI: 10.1016/j.chemphyslip.2009.10.010] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Accepted: 10/26/2009] [Indexed: 11/21/2022]
Abstract
Gaseous ozone chemically reacts with unsaturated triglyceride substrates leading to ozonated derivatives with a wide potential applications, ranging from the petrochemical to the pharmaceutical industry. To date, an ultimate understanding of the ozone reactivity during sesame oil ozonation process as well as detailed (1)H and (13)C NMR assignments are lacking. A practical advantage of NMR is that a single NMR sample measurement can explain many issues, while similar analysis by traditional methods may require several independent and time-consuming measurements. Moreover, significant relationships among NMR spectra and both conventional chemical analysis and viscosity measurements have been found. Eventually, NMR could play an important role for quality attributes of ozonated oil derivatives.
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