Studies on the catalase of Histoplasma capsulatum.

Abstract:

:Factors which control the levels of catalase within yeast cells of Histoplasma capsulatum were studied. Only a small fraction of the total catalase activity could be detected in whole cells. The bulk of the activity was revealed in cell-free extracts or in cells permeabilized with acetone. The formation of the enzyme was regulated by glucose and by oxygen. There were large, consistent differences in the levels of catalase among strains of H. capsulatum. The sensitivity of the strains to H2O2 toxicity also varied remarkably. Peroxidase activity could not be detected in cell-free extracts of the strains. Resistance to H2O2 did not correspond to levels of catalase. There was no obvious correlation of H2O2 sensitivity and virulence among the strains.

journal_name

Infect Immun

journal_title

Infection and immunity

authors

Howard DH

doi

10.1128/IAI.39.3.1161-1166.1983

subject

Has Abstract

pub_date

1983-03-01 00:00:00

pages

1161-6

issue

3

eissn

0019-9567

issn

1098-5522

journal_volume

39

pub_type

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