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  • Title: Isolation and characterization of a component of the surface sheath of Dictyostelium discoideum.
    Author: Freeze H, Loomis WF.
    Journal: J Biol Chem; 1977 Feb 10; 252(3):820-4. PubMed ID: 557037.
    Abstract:
    Aggregates of Dictyostelium discoideum are surrounded by a surface sheath which functions to maintain polarity and integrity during development. We have isolated and partially characterized a component of the surface sheath. It is composed of 60% cellulose, 15% protein, 3% heteropolysaccharide (heteropolymer), 5% lipid, and 1% sulfate when isolated from migrating slugs. The sheath, isolated from aggregates prior to tip formation, has less protein, a different heteropolymer, and cellulose of a lower crystallinity than the sheath of migrating slugs. The increase in crystallinity of the cellulose during development may be important in determining the strength of the surface sheath.
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