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- Title
Evidence for an operative glyoxylate cycle in the thermoacidophilic crenarchaeon Sulfolobus acidocaldarius
- Authors
Uhrigshardt, Helge; Walden, Michael; John, Harald; Petersen, Arnd; Anemüller, Stefan
- Abstract
Both key enzymes for the glyoxylate cycle, isocitrate lyase (EC 4.1.3.1) and malate synthase (EC 4.1.3.2), were purified and characterized from the thermoacidophilic crenarchaeon Sulfolobus acidocaldarius. Whereas the former enzyme was copurified with the aconitase, the latter enzyme could be enriched to apparent homogeneity. Amino acid sequencing of three internal peptides of the isocitrate lyase revealed the presence of highly conserved residues. With respect to cofactor requirement and quarternary structure the crenarchaeal malate synthase might represent a novel type of this enzyme family. High activities of both glyoxylate cycle enzymes could already be detected in extracts of glucose grown cells and both increased about two-fold in extracts of acetate grown cells.
- Subjects
ENZYMES; DEHYDROGENASES
- Publication
FEBS Letters, 2002, Vol 513, Issue 2/3, p223
- ISSN
0014-5793
- Publication type
Article
- DOI
10.1016/S0014-5793(02)02317-7