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  • Title: Immunological cross-reactivity of fungal and yeast plasma membrane H+-ATPase.
    Author: Vai M, Popolo L, Alberghina L.
    Journal: FEBS Lett; 1986 Sep 29; 206(1):135-41. PubMed ID: 2428661.
    Abstract:
    The plasma membrane H+-ATPases from fungi and yeasts have similar catalytic and molecular properties. A structural comparison has been performed using immunoblot analysis with polyclonal antibodies directed toward the 102 kDa polypeptide of the plasma membrane H+-ATPase from Neurospora crassa. A strong cross-reactivity is observed between the fungal H+-ATPase and the enzyme from the yeasts Saccharomyces cerevisiae and Schizosaccharomyces pombe. Structural homologies are indicated also by the analysis of the cross-reactive peptides originated by proteolytic digestion of Neurospora and S. cerevisiae purified enzymes. Neither enzyme from these two sources appears to be glycosylated by a highly sensitive concanavalin A affinity assay on blotted proteins. A glycoprotein of Mr 115000 and pI 4.8-5, which comigrates with a cell cycle-modulated protein on 2D gel, is present in partially purified preparations of plasma membrane H+-ATPase of S. cerevisiae and it is shown to be structurally unrelated to H+-ATPase.
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