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Journal of Bacteriology, November 2002, p. 6065-6068, Vol. 184, No. 21
0021-9193/02/$04.00+0     DOI: 10.1128/JB.184.21.6065-6068.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

The Gene yjfQ Encodes the Repressor of the yjfR-X Regulon (ula), Which Is Involved in L-Ascorbate Metabolism in Escherichia coli

Evangelina Campos, Juan Aguilar,* Laura Baldoma, and Josefa Badia

Department of Biochemistry, Faculty of Pharmacy, University of Barcelona, 08028 Barcelona, Spain

Received 14 June 2002/ Accepted 31 July 2002

Mutations in yjfQ allowed us to identify this gene as the regulator of the operon yjfS-X (ula operon), reported to be involved in L-ascorbate metabolism. Inactivation of this gene renders constitutive the expression of the ula operon, indicating that YjfQ acts as a repressor. We also demonstrate that this repressor regulates the nearby yjfR gene, which in this way constitutes a regulon with the ula operon.

* Corresponding author. Mailing address: Departamento de Bioquímica, Facultad de Farmacia, Universidad de Barcelona, Avda. Diagonal 643, 08028 Barcelona, Spain. Phone: 34 93 403 4496. Fax: 34 93 402 4520. E-mail: jaguilar{at}farmacia.far.ub.es.

Journal of Bacteriology, November 2002, p. 6065-6068, Vol. 184, No. 21
0021-9193/02/$04.00+0     DOI: 10.1128/JB.184.21.6065-6068.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Shi, R., Pineda, M., Ajamian, E., Cui, Q., Matte, A., Cygler, M. (2008). Structure of L-Xylulose-5-Phosphate 3-Epimerase (UlaE) from the Anaerobic L-Ascorbate Utilization Pathway of Escherichia coli: Identification of a Novel Phosphate Binding Motif within a TIM Barrel Fold. J. Bacteriol. 190: 8137-8144 [Abstract] [Full Text]  
  • Campos, E., de la Riva, L., Garces, F., Gimenez, R., Aguilar, J., Baldoma, L., Badia, J. (2008). The yiaKLX1X2PQRS and ulaABCDEFG Gene Systems Are Required for the Aerobic Utilization of L-Ascorbate in Klebsiella pneumoniae Strain 13882 with L-Ascorbate-6-Phosphate as the Inducer. J. Bacteriol. 190: 6615-6624 [Abstract] [Full Text]  
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  • Zhang, Z., Aboulwafa, M., Smith, M. H., Saier, M. H. Jr. (2003). The Ascorbate Transporter of Escherichia coli. J. Bacteriol. 185: 2243-2250 [Abstract] [Full Text]  


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