dpp genes of Rhizobium leguminosarum specify uptake of δ-aminolevulinic acid

Carter, R.A., Yeoman, K.H., Klein, A., Hosie, A.H.F., Sawers, G., Poole, P.S. and Johnston, A.W.B. (2002) dpp genes of Rhizobium leguminosarum specify uptake of δ-aminolevulinic acid. Molecular Plant-Microbe Interactions, 15 (1). pp. 69-74. ISSN 0894-0282

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Abstract

An operon with homology to the dppABCDF genes required to transport dipeptides in bacteria was identified in the N-fixing symbiont, Rhizobium leguminosarum. As in other bacteria, dpp mutants were severely affected in the import of d-aminolevulinic acid (ALA), a heme precursor. ALA uptake was antagonized by adding dipeptides, indicating that these two classes of molecule share the same transporter. Mutations in dppABCDF did not affect symbiotic N fixation on peas, suggesting that the ALA needed for heme synthesis is not supplied by the plant or that another uptake system functions in the bacteroids. The dppABCDF operon of R. leguminosarum resembles that in other bacteria, with a gap between dppA and dppB containing inverted repeats that may stabilize mRNA and may explain why transcription of dppA alone was higher than that of dppBCDF. The dppABCDF promoter was mapped and is most likely recognized by s.

Item Type: Article
Uncontrolled Keywords: abc transporter,gluconate kinase
Faculty \ School: Faculty of Science > School of Biological Sciences
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Depositing User: Pure Connector
Date Deposited: 11 Jun 2014 13:42
Last Modified: 21 Apr 2020 22:13
URI: https://ueaeprints.uea.ac.uk/id/eprint/44531
DOI:

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