PQQ-linked extracellular glucose oxidation and chemotaxis towards this cofactor in rhizobia
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 melil...
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Published in | FEMS microbiology letters Vol. 140; no. 2; pp. 179 - 184 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.07.1996
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Subjects | |
Online Access | Get full text |
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Summary: | 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. |
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ISSN: | 0378-1097 1574-6968 |
DOI: | 10.1016/0378-1097(96)00176-0 |