Current Microbiology

, Volume 62, Issue 4, pp 1321–1330

Transcriptomic Analysis for Genetic Mechanisms of the Factors Related to Biofilm Formation in Escherichia coli O157:H7


DOI: 10.1007/s00284-010-9862-4

Cite this article as:
Lee, JH., Kim, YG., Cho, M.H. et al. Curr Microbiol (2011) 62: 1321. doi:10.1007/s00284-010-9862-4


Two lineages of enterohemorrhagic Escherichia coli O157:H7 (EDL933, Stx1+ and Stx2+) and 86-24 (Stx2+) were investigated to determine the genetic basis of biofilm formation on abiotic surfaces. Strain EDL933 formed a robust biofilm while strain 86-24 formed almost no biofilm on either polystyrene plates or polyethylene tubes. Whole-transcriptome profiles of EDL933 versus 86-24 revealed that in the strong biofilm-forming strain, genes involved in curli biosynthesis and cellulose production were significantly induced, whereas genes involved in indole signaling were most repressed. Additionally, 49 phage genes were highly induced and repressed between the two strains. Curli assays using Congo red plates and scanning electron microscopy corroborated the microarray data as the EDL933 strain produced a large amount of curli, while strain 86-24 formed much less curli. Moreover, EDL933 produced 19-fold more cellulose than 86-24, and indole production in EDL933 was two times lower than that of the strain 86-24. Therefore, it appears E. coli O157:H7 EDL933 produces more biofilm because of its increased curli and cellulose production and reduced indole production.

Supplementary material

284_2010_9862_MOESM1_ESM.docx (54 kb)
Supplementary material 1 (DOCX 54 kb)

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.School of Chemical EngineeringYeungnam UniversityGyeongsan-si Gyeongsangbuk-doKorea
  2. 2.Department of Chemical EngineeringTexas A&M UniversityCollege StationUSA