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The photosensitivity of the malate oxidase system of a pigmented strain and a carotenoidless mutant of Sarcina lutea (Micrococcus luteus).

Authors
Type
Published Article
Journal
Archives of microbiology
Publication Date
Volume
113
Issue
1-2
Pages
39–42
Identifiers
PMID: 889386
Source
Medline
License
Unknown

Abstract

The effect of white light on the malate oxidase of Sarcina lutea (Micrococcus luteus) membranes has been examined using a carotenoid-containing and a carotenoidless mutant. At least three photosensitive sites have been detected. Two of these are associated with the malate dehydrogenase complex (malate-menaquinone reductase) and are unaffected by membrane carotenoid. A third site which has been detected beyond the dehydrogenase complex, is protected by carotenoid since it can only be demonstrated in carotenoidless systems. A repair mechanism has been found for one of the two sites in the dehydrogenase complex.

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