PQQ-linked extracellular glucose oxidation and chemotaxis towards this cofactor in rhizobia
| Autor: | Maria Lina Galar, Oense M. Neijssel, JoséLuis Boiardi |
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| Přispěvatelé: | Molecular Microbial Physiology (SILS, FNWI) |
| Rok vydání: | 1996 |
| Předmět: |
biology
food and beverages Chemotaxis biochemical phenomena metabolism and nutrition biology.organism_classification Microbiology Bradyrhizobium Cofactor chemistry.chemical_compound Positive chemotaxis Pyrroloquinoline quinone chemistry Biochemistry Glucose dehydrogenase Genetics biology.protein bacteria Rhizobium Molecular Biology Bradyrhizobium japonicum |
| Zdroj: | FEMS Microbiology Letters, 140, 179-184. Oxford University Press |
| ISSN: | 0378-1097 |
| Popis: | The presence of the pyrroloquinoline quinone (PQQ)-dependent glucose dehydrogenase in several strains of different Rhizobium species and of Bradyrhizobium japonicum was investigated. It was found that most strains were only able to synthesize the apo-enzyme, whereas in three strains, Rhizobium meliloti 102F34 and Bradyrhizobium japonicum strains USDA110 and USDA138 holo-enzyme activity could be observed. In washed suspensions, however, only Rhizobium meliloti 102F34 produced gluconate from glucose in the absence of added PQQ. All strains showed positive chemotaxis towards PQQ. This chemotaxis could already be observed with nanomolar concentrations of PQQ. |
| Databáze: | OpenAIRE |
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