title: Production and characterization of extracellular carbohydrate polymer from Cyanothece sp. CCY 0110.
abstract: Cyanobacterial extracellular polymeric substances (EPS) are heteropolysaccharides that possess characteristics suitable for industrial applications, notably a high number of different monomers, strong anionic nature and high hydrophobicity. However, systematic studies that unveil the conditions influencing EPS synthesis and/or its characteristics are mandatory. In this work, Cyanothece sp. CCY 0110 was used as model organism. Our results revealed that this strain is among the most efficient EPS producers, and that the amount of RPS (released polysaccharides) is mainly related to the number of cells, rather than to the amount produced by each cell. Light was the key parameter, with high light intensity enhancing significantly RPS production (reaching 1.8 g L(-1)), especially in the presence of combined nitrogen. The data showed that RPS are composed by nine different monosaccharides (including two uronic acids), the presence of sulfate groups and peptides, and that the polymer is remarkably thermostable and amorphous in nature.
authors: IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua do Campo Alegre 823, 4150-180 Porto, Portugal.
authors: Rita
authors: R
authors: Mota
authors: Rodrigo
authors: R
authors: Guimarães
authors: Zsófia
authors: Z
authors: Büttel
authors: Federico
authors: F
authors: Rossi
authors: Giovanni
authors: G
authors: Colica
authors: Carla J
authors: CJ
authors: Silva
authors: Carla
authors: C
authors: Santos
authors: Luís
authors: L
authors: Gales
authors: Andrea
authors: A
authors: Zille
authors: Roberto
authors: R
authors: De Philippis
authors: Sara B
authors: SB
authors: Pereira
authors: Paula
authors: P
authors: Tamagnini
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism; D019149:Bioreactors; D049109:Cell Proliferation; D046508:Culture Techniques; D046889:Cyanothece / Q000166:cytology* / Q000254:growth & development / Q000378:metabolism*; D005110:Extracellular Space / Q000378:metabolism*; D007221:Industry; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis* / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D011135:Polysaccharides, Bacterial