Gordonan, an Acidic Polysaccharide with Cell Aggregation-Inducing Activity in Insect BM-N4 Cells, Produced by <i>Gordonia</i> sp.

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  • KONDO Tatsuhiko
    Department of Applied Biological Chemistry, The University of Tokyo
  • YAMAMOTO Daisuke
    Department of Applied Biological Chemistry, The University of Tokyo
  • YOKOTA Akira
    Institute of Molecular and Cellular Biosciences. The University of Tokyo
  • SUZUKI Akinori
    Department of Applied Biological Chemistry, The University of Tokyo
  • NAGASAWA Hiromichi
    Department of Applied Biological Chemistry, The University of Tokyo
  • SAKUDA Shohei
    Department of Applied Biological Chemistry, The University of Tokyo

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  • Gordonan, an Acidic Polysaccharide with Cell Aggregation-Inducing Activity in Insect BM-N4 Cells, Produced by Gordonia sp.

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  An acidic polysaccharide, termed gordonan, was isolated from the culture medium of Gordonia sp. as an inducer of cell aggregation in an insect cell line, BM-N4. Gordonan had an average molecular weight of 5×106 and its structure was identified as →3)-4-O-(1-carboxyethyl)-β-D-Manp-(1→4)-β-D-GlcAp-(1→4)-β-D-Glcp-(1→ mainly by acid hydrolysis experiments and NMR analysis. It induces cell aggregation at the concentration of 4 μg/ml. A partially hydrolyzed polysaccharide derived from gordonan with a molecular weight of 5×105 showed weak activity, while any fragment molecules with lower molecular weights prepared from gordonan showed no activity.<br>

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