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Structure type: polymer chemical repeating unit
Compound class: EPS, polysaccharide
Contained glycoepitopes: IEDB_115136,IEDB_136044,IEDB_136105,IEDB_136906,IEDB_137472,IEDB_137485,IEDB_140630,IEDB_141794,IEDB_142488,IEDB_144983,IEDB_146664,IEDB_151528,IEDB_152206,IEDB_190606,IEDB_225177,IEDB_423153,IEDB_885823,IEDB_983930,IEDB_983931,SB_165,SB_166,SB_187,SB_192,SB_195,SB_44,SB_7,SB_72,SB_88

• Article ID: 1154
  Rougeaux H, Guezennec J, Carlson RW, Kervarec N, Pichon R, Talaga P "Structural determination of the exopolysaccharide of Pseudoalteromonas strain HYD 721 isolated from a deep-sea hypothermal vent" - Carbohydrate Research 315(3-4) (1999) 273-285
  

  The structure of the exopolysaccharide produced by Pseudoalteromonas reference strain HYD 721 recovered from a deep-sea hydrothermal vent has been investigated. By means of methylation and beta-elimination analysis, selective degradation of the uronic acids, partial depolymerization and NMR studies, the repeating unit of the polymer was deduced to be a branched octasaccharide with the structure shown. [formula]

  strain, structural, determination, structural determination, uronic acid, exopolysaccharide, Bacterial polysaccharide, hydrothermal vent, Pseudoalteromonas

  NCBI PubMed ID: 10399301
  Journal NLM ID: 0043535
  Publisher: Elsevier
  Correspondence: jguezenn@ifremer.fr
  Institutions: Complex Carbohydrate Center, University of Georgia, Athens, GA 30602-4712, USA, Groupe EVEN, BP 67, F-29260 Ploudaniel, France, Ifremer, Centre de Brest, DRV:VP:BMH, BP 70, F-29280 Plouzane, France, Laboratoire de RMN, Uni6ersite de Bretagne Occidentale, F-29200 Brest, France
  Methods: 13C NMR, 1H NMR, methylation, GLC-MS, b-elimination, composition analysis
  
   
  
  Pseudoalteromonas sp. HYD721
  CSDB ID 4375 (all data & tools)
• Article ID: 4435
  Nazarenko EL, Komandrova NA, Gorshkova RP, Tomshich SV, Zubkov VA, Kilcoyne M, Savage AV "Structures of polysaccharides and oligosaccharides of some Gram-negative marine Proteobacteria" - Carbohydrate Research 338(23) (2003) 2449-2457
  

  The chemical structures of polysaccharides and LPS core oligosaccharides, isolated from various Gram-negative marine bacteria from the genera Pseudoalteromonas and Shewanella belonging to the Alteromonadaceae family and gamma-subclass of Proteobacteria, are reviewed. The polysaccharides are distinguished by the acidic character (e.g., due to the presence of hexuronic and aldulosonic acids and their derivatives) and the occurrence of unusual sugars, including N-acyl derivatives of 6-deoxyamino sugars, such as N-acetyl-D-quinovosamine, N-acetyl-L-fucosamine and N-acetyl-6-deoxy-L-talosamine, and higher sugars like 2,6-dideoxy-2-acetamido-4-C-(3'-carboxamide-2',2'-dihydroxypropyl)-D-galac topyranose (shewanellose). Many constituent sugars have various uncommon non-sugar substituents, such as alanine, formic, lactic and hydroxybutyric acids, sulfate, phosphate, and 2-aminopropane-1,3-diol.

  Lipopolysaccharide, oligosaccharide structure, O-antigen, polysaccharide structure, Shewanella, Pseudoalteromonas, Proteobacteria

  NCBI PubMed ID: 14670708
  Publication DOI: 10.1016/j.carres.2003.06.004
  Journal NLM ID: 0043535
  Publisher: Elsevier
  Correspondence: A.V. Savage
  Institutions: Department of Chemistry, National University of Ireland, Galway, Ireland, Pacific Institute of Bioorganic Chemistry, Far East Branch of the Russian Academy of Sciences, Vladivostok 690022, Russian Federation
  
   
  
  Pseudoalteromonas sp. HYD 721
  CSDB ID 3755 (all data & tools)
• Article ID: 5137
  Casillo A, Lanzetta R, Parrilli M, Corsaro MM "Exopolysaccharides from Marine and Marine Extremophilic Bacteria: Structures, Properties, Ecological Roles and Applications" - Marine Drugs 16(2) (2018) pii E69
  

  The marine environment is the largest aquatic ecosystem on Earth and it harbours microorganisms responsible for more than 50% of total biomass of prokaryotes in the world. All these microorganisms produce extracellular polymers that constitute a substantial part of the dissolved organic carbon, often in the form of exopolysaccharides (EPS). In addition, the production of these polymers is often correlated to the establishment of the biofilm growth mode, during which they are important matrix components. Their functions include adhesion and colonization of surfaces, protection of the bacterial cells and support for biochemical interactions between the bacteria and the surrounding environment. The aim of this review is to present a summary of the status of the research about the structures of exopolysaccharides from marine bacteria, including capsular, medium released and biofilm embedded polysaccharides. Moreover, ecological roles of these polymers, especially for those isolated from extreme ecological niches (deep-sea hydrothermal vents, polar regions, hypersaline ponds, etc.), are reported. Finally, relationships between the structure and the function of the exopolysaccharides are discussed.

  NMR, capsular polysaccharide, exopolysaccharide, exopolysaccharides, EPS, purification, Extremophile, marine, chemical characterization, GC-MS, structure/activity relationship

  NCBI PubMed ID: 29461505
  Publication DOI: 10.3390/md16020069
  Journal NLM ID: 101213729
  Publisher: Basel, Switzerland: Molecular Diversity Preservation International
  Correspondence: corsaro@unina.it; angela.casillo@unina.it
  Institutions: Department of Chemical Sciences, University of Naples 'Federico II', Naples 80126, Italy
  
   
  
  Pseudoalteromonas sp. HYD 721
  CSDB ID 13092 (all data & tools)
• Article ID: 5633
  Guezennec J "Deep-sea hydrothermal vents: a new source of innovative bacterial exopolysaccharides of biotechnological interest?" - Journal of Industrial Microbiology and Biotechnology 29(4) (2002) 204-208
  

  Polysaccharides and, in particular, microbial polysaccharides represent a class of important products of growing interest for many sectors of industry. Although many known marine bacteria produce exopolysaccharides (EPS), continuation in looking for new polysaccharide-producing microorganisms is promising. Hydrothermal deep-sea vents could be a source of novel EPS as indicated by the screening of a number of mesophilic heterotrophic bacteria recovered from different locations. Although originating from such extreme environment, some bacteria were shown to biosynthesize innovative EPS under laboratory conditions. Their specific rheological properties either in the presence or absence of monovalent and divalent ions, biological activities, metal binding capabilities, and novel chemical composition mean that these EPS are expected to find many applications in the near future

  Bacterial exopolysaccharides, hydrothermal vents

  NCBI PubMed ID: 12355321
  Publication DOI: 10.1038/sj.jim.7000298
  Journal NLM ID: 9705544
  Institutions: IFREMER, Centre de Brest, Dept. DRV/VP/BMM, Plouzane, France
  
   
  
  Pseudoalteromonas sp. 721
  CSDB ID 47862 (all data & tools)
• Article ID: 5634
  Nichols CA, Guezennec J, Bowman JP "Bacterial exopolysaccharides from extreme marine environments with special consideration of the southern ocean, sea ice, and deep-sea hydrothermal vents: a review" - Marine Biotechnology 7(4) (2005) 253-271
  

  Exopolysaccharides (EPSs) are high molecular weight carbohydrate polymers that make up a substantial component of the extracellular polymers surrounding most microbial cells in the marine environment. EPSs constitute a large fraction of the reduced carbon reservoir in the ocean and enhance the survival of marine bacteria by influencing the physicochemical environment around the bacterial ce11. Microbial EPSs are abundant in the Antarctic marine environment, for example, in sea ice and ocean particles, where they may assist microbial communities to endure extremes of temperature, salinity, and nutrient availability. The microbial biodiversity of Antarctic ecosystems is relatively unexplored. Deep-sea hydrothermal vent environments are characterized by high pressure, extreme temperature, and heavy metals. The commercial value of microbial EPSs from these habitats has been established recently. Extreme environments offer novel microbial biodiversity that produces varied and promising EPSs. The biotechnological potential of these biopolymers from hydrothermal vent environments as well as from Antarctic marine ecosystems remains largely untapped

  Bacterial exopolysaccharides, hydrothermal vents

  NCBI PubMed ID: 16075348
  Publication DOI: 10.1007/s10126-004-5118-2
  Journal NLM ID: 100892712
  Correspondence: C.A.Mancuso@utas.edu.au
  Institutions: School of Agricultural Science, University of Tasmania, Hobart, Australia, Institute Français de Recherche pour l’Exploitation de la Mer, Centre de Brest, DRV/VP, Plouzané, France, Australian Centre of Excellence for Food Safety, University of Tasmania, Hobart, Australia
  
   
  
  Pseudoalteromonas sp. 721
  CSDB ID 47864 (all data & tools)