ANTIGENS OF ASPERGILLUS-FUMIGATUS .1. PURIFICATION OF A CYTOPLASMIC ANTIGEN REACTIVE WITH SERA OF PATIENTS WITH ASPERGILLUS-RELATED DISEASE

  • 1 January 1981
    • journal article
    • research article
    • Vol. 45 (3), 662-671
Abstract
An antigen is purified from the mycelial cell sap of A. fumigatus (strain 507). The same component appears to be present in the extracellular phase (culture filtrate) in a partially degraded form. The cell sap protein has a structure composed of 4 polypeptides of 45,000 daltons linked through disulfide bonds. The isoelectric point (5.2-5.6) and carbohydrate content (12.5% neutral hexose) indicate that this proteins is an acidic glycoprotein. It shows reactions with 75% of sera from patients with aspergilloma and allergic bronchopulmonary aspergillosis and is not reactive with sera from normal individuals or patients with other fungal diseases. It also appears to be a component of other A. fumigatus strains.