MOLECULAR ANALYSIS OF THE RHIZOBIUM-MELILOTI MUCR GENE REGULATING THE BIOSYNTHESIS OF THE EXOPOLYSACCHARIDES SUCCINOGLYCAN AND GALACTOGLUCAN

KELLER M, ROXLAU A, WENG WM, SCHMIDT M, QUANDT J, Niehaus K, Jording D, Arnold W, Pühler A (1995)
MOLECULAR PLANT-MICROBE INTERACTIONS 8(2): 267-277.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
KELLER, M; ROXLAU, A; WENG, WM; SCHMIDT, M; QUANDT, J; Niehaus, KarstenUniBi; Jording, DorisUniBi; Arnold, WalterUniBi; Pühler, AlfredUniBi
Abstract / Bemerkung
The Rhizobium meliloti Tn5 mutant Rm3131, producing galactoglucan (EPS II) instead of succinoglycan (EPS I), was complemented by a 3.6-kb EcoRI-fragment of the Rhizobium meliloti genome. Sequencing of this fragment revealed six open reading frames (ORFs). The ORF found to be affected in the mutant Rm3131 codes for a putative protein of 15.7 kDa and forms a monocistronic transcriptional unit. Further genetic analysis revealed that the gene mutated in Rm3131 is identical to the previously described R. meliloti mucR gene (H. Zhan, S. B. Levery, C. C. Lee, and J. A. Leigh, 1989, Proc. Natl. Acad. Sci. USA 86:3055-3059). By hybridization it was shown that a mucR homologous gene is present in several rhizobacteria. The deduced amino acid sequence of MucR showed nearly 80% identity to the Agrobacterium tumefaciens Ros protein, a negative regulator of vir genes and necessary for succinoglycan production. MucR contains like Ros a putative zinc finger sequence of the C2H2 type. Transcriptional fusions of genes for EPS I and EPS II synthesis, the so-called exo and exp genes, with the marker gene lacZ were used to delineate the role of mucR for exo and exp gene expression. It was found that exp genes are negatively regulated by MucR on the transcriptional level, whereas a posttranscriptional regulation by MucR is assumed for exo genes. Furthermore, mucR is negatively regulating its own transcription.
Stichworte
SYMBIOSIS; GENE REGULATION; EXOPOLYSACCHARIDE SYNTHESIS
Erscheinungsjahr
1995
Zeitschriftentitel
MOLECULAR PLANT-MICROBE INTERACTIONS
Band
8
Ausgabe
2
Seite(n)
267-277
ISSN
0894-0282
Page URI
https://pub.uni-bielefeld.de/record/1641112

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KELLER M, ROXLAU A, WENG WM, et al. MOLECULAR ANALYSIS OF THE RHIZOBIUM-MELILOTI MUCR GENE REGULATING THE BIOSYNTHESIS OF THE EXOPOLYSACCHARIDES SUCCINOGLYCAN AND GALACTOGLUCAN. MOLECULAR PLANT-MICROBE INTERACTIONS. 1995;8(2):267-277.
KELLER, M., ROXLAU, A., WENG, W. M., SCHMIDT, M., QUANDT, J., Niehaus, K., Jording, D., et al. (1995). MOLECULAR ANALYSIS OF THE RHIZOBIUM-MELILOTI MUCR GENE REGULATING THE BIOSYNTHESIS OF THE EXOPOLYSACCHARIDES SUCCINOGLYCAN AND GALACTOGLUCAN. MOLECULAR PLANT-MICROBE INTERACTIONS, 8(2), 267-277. doi:10.1094/MPMI-8-0267
KELLER, M., ROXLAU, A., WENG, W. M., SCHMIDT, M., QUANDT, J., Niehaus, K., Jording, D., Arnold, W., and Pühler, A. (1995). MOLECULAR ANALYSIS OF THE RHIZOBIUM-MELILOTI MUCR GENE REGULATING THE BIOSYNTHESIS OF THE EXOPOLYSACCHARIDES SUCCINOGLYCAN AND GALACTOGLUCAN. MOLECULAR PLANT-MICROBE INTERACTIONS 8, 267-277.
KELLER, M., et al., 1995. MOLECULAR ANALYSIS OF THE RHIZOBIUM-MELILOTI MUCR GENE REGULATING THE BIOSYNTHESIS OF THE EXOPOLYSACCHARIDES SUCCINOGLYCAN AND GALACTOGLUCAN. MOLECULAR PLANT-MICROBE INTERACTIONS, 8(2), p 267-277.
M. KELLER, et al., “MOLECULAR ANALYSIS OF THE RHIZOBIUM-MELILOTI MUCR GENE REGULATING THE BIOSYNTHESIS OF THE EXOPOLYSACCHARIDES SUCCINOGLYCAN AND GALACTOGLUCAN”, MOLECULAR PLANT-MICROBE INTERACTIONS, vol. 8, 1995, pp. 267-277.
KELLER, M., ROXLAU, A., WENG, W.M., SCHMIDT, M., QUANDT, J., Niehaus, K., Jording, D., Arnold, W., Pühler, A.: MOLECULAR ANALYSIS OF THE RHIZOBIUM-MELILOTI MUCR GENE REGULATING THE BIOSYNTHESIS OF THE EXOPOLYSACCHARIDES SUCCINOGLYCAN AND GALACTOGLUCAN. MOLECULAR PLANT-MICROBE INTERACTIONS. 8, 267-277 (1995).
KELLER, M, ROXLAU, A, WENG, WM, SCHMIDT, M, QUANDT, J, Niehaus, Karsten, Jording, Doris, Arnold, Walter, and Pühler, Alfred. “MOLECULAR ANALYSIS OF THE RHIZOBIUM-MELILOTI MUCR GENE REGULATING THE BIOSYNTHESIS OF THE EXOPOLYSACCHARIDES SUCCINOGLYCAN AND GALACTOGLUCAN”. MOLECULAR PLANT-MICROBE INTERACTIONS 8.2 (1995): 267-277.

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