| Autor: |
Schuurink R; Department of Genetics, Agricultural University, Wageningen, The Netherlands., Busink R, Hondmann DH, Witteveen CF, Visser J |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of general microbiology [J Gen Microbiol] 1990 Jun; Vol. 136 (6), pp. 1043-50. |
| DOI: |
10.1099/00221287-136-6-1043 |
| Abstrakt: |
Glycerol dehydrogenase, NADP(+)-specific (EC 1.1.1.72), was purified from mycelium of Aspergillus nidulans and Aspergillus niger using different purification procedures. Both enzymes had an Mr of approximately 38,000 and were immunologically cross-reactive, but had different amino acid compositions and isoelectric points. For both enzymes, the substrate specificity was limited to glycerol and erythritol for the oxidative reaction and to dihydroxyacetone (DHA), diacetyl, methylglyoxal, erythrose and D-glyceraldehyde for the reductive reaction. The A. nidulans enzyme had a turnover number twice that of the A. niger enzyme at pH 6.0, whereas inhibition by NADP+ was less (Ki = 45 microM vs 13 microM). It is proposed that both enzymes catalyse in vivo the reduction of DHA to glycerol and that they are regulated by the anabolic reduction charge. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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