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Article

DHA-1 plasmid-mediated AmpC β-lactamase expression and regulation of Klebsiella pnuemoniae isolates

  • Authors:
    • Ying Luan
    • Gui-Ling Li
    • Li-Bo Duo
    • Wei-Ping Wang
    • Cheng-Ying Wang
    • He-Guang Zhang
    • Fei He
    • Xin He
    • Shu-Juan Chen
    • Dan-Ting Luo
  • View Affiliations / Copyright

    Affiliations: Department of Medicine Laboratory, Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China, Medicine Laboratory, Department of Urology Surgery, Daqing Oilfield General Hospital, Daqing, Heilongjiang 163001, P.R. China, Department of Medicine Laboratory, Hospital of Harbin Institute of Technology, Harbin, Heilongjiang 150001, P.R. China, Department of Medicine Laboratory, The Fourth People's Hospital of Shenyang, Shenyang, Liaoning 110031, P.R. China
  • Pages: 3069-3077
    |
    Published online on: December 5, 2014
       https://doi.org/10.3892/mmr.2014.3054
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Abstract

The present study aimed to investigate the regulatory mechanism of the AmpC enzyme by analyzing the construction and function of AmpCR, AmpE and AmpG genes in the Dhahran (DHA)‑1 plasmid of Klebsiella pneumoniae (K. pneumoniae). The production of AmpC and extended‑spectrum β‑lactamase (ESBL) were determined following the cefoxitin (FOX) inducing test for AmpC, preliminary screening and confirmation tests for ESBL in 10 DHA‑1 plasmid AmpC enzymes of K. pneumoniae strains. AmpCR, AmpD, AmpE and AmpG sequences were analyzed by polymerase chain reaction. The pACYC184‑X plasmid analysis system was established and examined by regulating the pAmpC enzyme expression. The electrophoretic bands of AmpCR, AmpD, AmpE and AmpG were expressed. Numerous mutations in AmpC + AmpR (AmpCR) and in the intergenic region cistron of AmpC‑AmpR, AmpD, AmpE and AmpG were observed. The homology of AmpC and AmpR, in relation to the Morganella morganii strain, was 99%, which was determined by comparing the gene sequences of Kp1 with those of Kp17 AmpCR. The specific combination of AmpR and labeled probe demonstrated a band retarded phenomenon and established a spatial model of AmpR. All the enzyme production strains demonstrated Val93→Ala in AmpG; six transmembrane domains were found in AmpE in all strains, with the exception of Kp1 and Kp4, which had only three transmembrane segments that were caused by mutation. The DHA‑1 plasmid AmpC enzymes encoded by plasmid are similar to the inducible chromosomal AmpC enzymes, which are also regulated by AmpD, AmpE, AmpR and AmpG.
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Copy and paste a formatted citation
Spandidos Publications style
Luan Y, Li G, Duo L, Wang W, Wang C, Zhang H, He F, He X, Chen S, Luo D, Luo D, et al: DHA-1 plasmid-mediated AmpC β-lactamase expression and regulation of Klebsiella pnuemoniae isolates. Mol Med Rep 11: 3069-3077, 2015.
APA
Luan, Y., Li, G., Duo, L., Wang, W., Wang, C., Zhang, H. ... Luo, D. (2015). DHA-1 plasmid-mediated AmpC β-lactamase expression and regulation of Klebsiella pnuemoniae isolates. Molecular Medicine Reports, 11, 3069-3077. https://doi.org/10.3892/mmr.2014.3054
MLA
Luan, Y., Li, G., Duo, L., Wang, W., Wang, C., Zhang, H., He, F., He, X., Chen, S., Luo, D."DHA-1 plasmid-mediated AmpC β-lactamase expression and regulation of Klebsiella pnuemoniae isolates". Molecular Medicine Reports 11.4 (2015): 3069-3077.
Chicago
Luan, Y., Li, G., Duo, L., Wang, W., Wang, C., Zhang, H., He, F., He, X., Chen, S., Luo, D."DHA-1 plasmid-mediated AmpC β-lactamase expression and regulation of Klebsiella pnuemoniae isolates". Molecular Medicine Reports 11, no. 4 (2015): 3069-3077. https://doi.org/10.3892/mmr.2014.3054
Copy and paste a formatted citation
x
Spandidos Publications style
Luan Y, Li G, Duo L, Wang W, Wang C, Zhang H, He F, He X, Chen S, Luo D, Luo D, et al: DHA-1 plasmid-mediated AmpC β-lactamase expression and regulation of Klebsiella pnuemoniae isolates. Mol Med Rep 11: 3069-3077, 2015.
APA
Luan, Y., Li, G., Duo, L., Wang, W., Wang, C., Zhang, H. ... Luo, D. (2015). DHA-1 plasmid-mediated AmpC β-lactamase expression and regulation of Klebsiella pnuemoniae isolates. Molecular Medicine Reports, 11, 3069-3077. https://doi.org/10.3892/mmr.2014.3054
MLA
Luan, Y., Li, G., Duo, L., Wang, W., Wang, C., Zhang, H., He, F., He, X., Chen, S., Luo, D."DHA-1 plasmid-mediated AmpC β-lactamase expression and regulation of Klebsiella pnuemoniae isolates". Molecular Medicine Reports 11.4 (2015): 3069-3077.
Chicago
Luan, Y., Li, G., Duo, L., Wang, W., Wang, C., Zhang, H., He, F., He, X., Chen, S., Luo, D."DHA-1 plasmid-mediated AmpC β-lactamase expression and regulation of Klebsiella pnuemoniae isolates". Molecular Medicine Reports 11, no. 4 (2015): 3069-3077. https://doi.org/10.3892/mmr.2014.3054
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