PubMed · 5618102
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O Ia Rashba. [Study of specific bacterial polysaccharides].. https://pubmed.ncbi.nlm.nih.gov/5618102/
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Agrobacterium isolated from soil samples produced two extracellular polysaccharides: succinoglycan, an acidic soluble polymer, and curdlan gum, a neutral, insoluble polymer. Maize glucose, cassava glucose, and maize maltose were used in fermentation medium to produce insoluble polysaccharide. Two Agrobacterium sp. strains which were used (ATCC 31749 and IFO 13140) in the production of insoluble exopolysaccharide presented equal or superior yields compared to the literature. The strain ATCC 31749 yielded better production when using maize maltose, whose yield was 85%, whereas strain IFO 13140 produced more when fed maize glucose, producing a yield of 50% (on reducing sugars).
OBJECTIVE: To isolate and purify a new polysaccharid Streptomyces polysaccharid polysaccharide (SMP ), from cultured broth of a Streptomyces sp.strain and perform its structural analysis. METHODS: Ethanol was used to precipitate the polysaccharides and macromolecules from the broth. The proteins in the precipitate were removed by Sevage method and purification of SMP was carried out by DEAE-celluloseion-exchange chromatography and Sephadex G-25 gel filtration. The chemical structure of the SMP was determined by combined application of high performance liquid chromatography (HPLC), UV, IR and 1H-NMR spectroscopy, supplemented by periodate oxidation and Smith degradation. RESULTS: The purified SMP was neutral by a relative molecular mass of approximately 4 855. Sugar analysis showed that SMP contained glucose and fructose residues in an approximate molar ratio of 22:1 (10.96 to 0.48). The glycosidic linkages were estimated to be (1-6)- alpha-D- pyranoside form. CONCLUSION: SMP is characterized as a (1-6)- alpha-D- pyranose.
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