Protein & Cell

, Volume 2, Issue 3, pp 250–258

An unexpected similarity between antibiotic-resistant NDM-1 and beta-lactamase II from Erythrobacter litoralis

  • Beiwen Zheng
  • Shuguang Tan
  • Jia Gao
  • Huiming Han
  • Jun Liu
  • Guangwen Lu
  • Di Liu
  • Yong Yi
  • Baoli Zhu
  • George F. Gao
Research Article

DOI: 10.1007/s13238-011-1027-0

Cite this article as:
Zheng, B., Tan, S., Gao, J. et al. Protein Cell (2011) 2: 250. doi:10.1007/s13238-011-1027-0

Abstract

NDM-1 (New Delhi metallo-beta-lactamase) gene encodes a metallo-beta-lactamase (MBL) with high carbapenemase activity, which makes the host bacterial strain easily dispatch the last-resort antibiotics known as carbapenems and cause global concern. Here we present the bioinformatics data showing an unexpected similarity between NDM-1 and beta-lactamase II from Erythrobacter litoralis, a marine microbial isolate. We have further expressed these two mature proteins in E. coli cells, both of which present as a monomer with a molecular mass of 25 kDa. Antimicrobial susceptibility assay reveals that they share similar substrate specificities and are sensitive to aztreonam and tigecycline. The conformational change accompanied with the zinc binding visualized by nuclear magnetic resonance, Zn2+-bound NDM-1, adopts at least some stable tertiary structure in contrast to the metal-free protein. Our work implies a close evolutionary relationship between antibiotic resistance genes in environmental reservoir and in the clinic, challenging the antimicrobial resistance monitoring.

Keywords

NDM-1metallo-β-lactamaseErythrobacter litoralissimilarityantibiotics resistance

Supplementary material

13238_2011_1027_MOESM1_ESM.pdf (228 kb)
Supplementary material, approximately 228 KB.

Copyright information

© Higher Education Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Beiwen Zheng
    • 1
    • 2
  • Shuguang Tan
    • 1
    • 2
  • Jia Gao
    • 1
    • 3
  • Huiming Han
    • 1
    • 2
  • Jun Liu
    • 1
  • Guangwen Lu
    • 1
    • 2
  • Di Liu
    • 1
    • 4
  • Yong Yi
    • 5
  • Baoli Zhu
    • 1
  • George F. Gao
    • 1
    • 2
    • 6
  1. 1.CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of MicrobiologyChinese Academy of SciencesBeijingChina
  2. 2.College of Life SciencesGraduate University, Chinese Academy of SciencesBeijingChina
  3. 3.The Key Laboratory of Ministry of Education for Microbial and Plant Genetic EngineeringGuangxi UniversityNanningChina
  4. 4.Network Information Center, Institute of MicrobiologyChinese Academy of SciencesBeijingChina
  5. 5.The 306th Hospital of Chinese PLABeijingChina
  6. 6.Beijing Institutes of Life ScienceChinese Academy of SciencesBeijingChina