PMID- 24389036 OWN - NLM STAT- MEDLINE DCOM- 20141028 LR - 20151119 IS - 1872-8359 (Electronic) IS - 0167-7012 (Linking) VI - 98 DP - 2014 Mar TI - Extracellular protein biomarkers for the characterization of enterohemorrhagic and enteroaggregative Escherichia coli strains. PG - 76-83 LID - S0167-7012(13)00395-3 [pii] LID - 10.1016/j.mimet.2013.12.017 [doi] AB - The extracellular proteins (ECPs) of enterohemorrhagic Escherichia coli (EHEC) can cause hemorrhagic colitis which may cause life threatening hemolytic-uremic syndrome, while that of enteroaggregative E. coli (EAEC) can clump to intestinal membranes. Liquid chromatography-electrospray ionization-tandem mass spectrometry based proteomics is used to evaluate a preliminary study on the extracellular and whole cell protein extracts associated with E. coli strain pathogenicity. Proteomics analysis, which is independent of genomic sequencing, of EAEC O104:H4 (unsequenced genome) identified a number of proteins. Proteomics of EHEC O104:H4, causative agent of the Germany outbreak, showed a closest match with E. coli E55989, in agreement with genomic studies. Dendrogram analysis separated EHEC O157:H7 and EHEC/EAEC O104:H4. ECP analysis compared to that of whole cell processing entails few steps and convenient experimental extraction procedures. Bacterial characterization results are promising in exploring the impact of environmental conditions on E. coli ECP biomarkers with a few relatively straightforward protein extraction steps. CI - Published by Elsevier B.V. FAU - Jabbour, Rabih E AU - Jabbour RE AD - Research and Technology Directorate, Edgewood Chemical Biological Center, US Army Aberdeen Proving Ground, MD 21010, United States. FAU - Deshpande, Samir V AU - Deshpande SV AD - Science and Technology Corporation Edgewood, MD 21040, United States. FAU - McCubbin, Patrick E AU - McCubbin PE AD - Optimetrics, Inc., Abingdon, MD 21009, United States. FAU - Wright, James D AU - Wright JD AD - Research and Technology Directorate, Edgewood Chemical Biological Center, US Army Aberdeen Proving Ground, MD 21010, United States. FAU - Wade, Mary Margaret AU - Wade MM AD - Research and Technology Directorate, Edgewood Chemical Biological Center, US Army Aberdeen Proving Ground, MD 21010, United States. FAU - Snyder, A Peter AU - Snyder AP AD - Research and Technology Directorate, Edgewood Chemical Biological Center, US Army Aberdeen Proving Ground, MD 21010, United States. Electronic address: arnold.p.snyder.civ@mail.mil. LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20131231 PL - Netherlands TA - J Microbiol Methods JT - Journal of microbiological methods JID - 8306883 RN - 0 (Biomarkers) RN - 0 (Escherichia coli Proteins) SB - IM MH - Biomarkers/*chemistry/metabolism MH - Chromatography, Liquid/methods MH - Disease Outbreaks MH - Escherichia coli/genetics/*metabolism MH - Escherichia coli Infections/*diagnosis/genetics/metabolism/*microbiology MH - Escherichia coli O157/genetics/*metabolism MH - Escherichia coli Proteins/genetics/*metabolism MH - Genomics/methods MH - Germany MH - Proteomics/methods MH - Spectrometry, Mass, Electrospray Ionization/methods OTO - NOTNLM OT - Electrospray OT - Enteroaggregative E. coli OT - Enterohemorrhagic E. coli OT - Extracellular proteins OT - Liquid chromatography-tandem mass spectrometry OT - Proteomics EDAT- 2014/01/07 06:00 MHDA- 2014/10/29 06:00 CRDT- 2014/01/07 06:00 PHST- 2013/09/10 00:00 [received] PHST- 2013/12/18 00:00 [revised] PHST- 2013/12/20 00:00 [accepted] PHST- 2014/01/07 06:00 [entrez] PHST- 2014/01/07 06:00 [pubmed] PHST- 2014/10/29 06:00 [medline] AID - S0167-7012(13)00395-3 [pii] AID - 10.1016/j.mimet.2013.12.017 [doi] PST - ppublish SO - J Microbiol Methods. 2014 Mar;98:76-83. doi: 10.1016/j.mimet.2013.12.017. Epub 2013 Dec 31.