Research Article

Gene Expression during Survival of Escherichia coli O157:H7 in Soil and Water

Table 3

Selected genes differentially expressed between growth in LB and sterile soil microcosms.

Function and geneDescriptionLogarithmic ratio (S/C)P-value

Amino acid biosynthesis
 hisGHistidine biosynthesis2.05 -
 argBArginine biosynthesis3.05 -
 argCArginine biosynthesis3.52 -
 argGArginine biosynthesis3.07 -
 asnBAsparagine synthetase B3.41 -
 thrLThr operon leader peptide3.43 -
 cysKCysteine biosynthesis3.53 -

Antibiotic resistance
 marAMultiple antibiotic resistance protein4.20 -
 marBMultiple antibiotic resistance protein4.41 -
 marRMultiple antibiotic resistance protein5.16 -

DNA replication/repair, restriction/modification
 priBPrimosomal replication protein2.19 -
 topADNA topoisomerase I2.33 -
 fisDNA binding protein Fis2.37 -
 priAPrimosome assembly protein2.60 -

Metabolism
 aceEPyruvate dehydrogenase E1 subunit2.03 -
 asmAProtein asmA precursor; electron transport2.21 -
 lpdADihydrolipoamide dehydrogenase; energy metabolism2.24 -
 nemAN-ethylmaleimide reductase; central intermediary metabolism2.71 -
 glpCAnaerobic glycerol-3-phosphate dehydrogenase subunit C2.81 -
 yfhOCysteine metabolism; amino acid metabolism3.25 -
 icdAIsocitrate dehydrogenase; TCA cycle metabolism3.48 -
 adhCAlcohol dehydrogenase class III; energy metabolism4.19 -
 yibOPhosphoglyceromutase; carbohydrate metabolism6.21 -
 ttdBL(+)-tartrate dehydrase; energy metabolism0.44 -
 hycGFormate hydrogenlyase subunit 7; mitochondrial electron transport0.44 -
 phnHCarbon-phosphorus lyase complex subunit; central intermediary metabolism0.45 -
 mhpFAcetaldehyde dehydrogenase; amino acid metabolism0.46 -
 phnJCarbon-phosphorus lyase complex subunit; central intermediary metabolism0.46 -
 hycFHydrogenase 4 Fe-S subunit formate hydrogenlyase, complex iron-sulfur protein0.47 -
 eutIPhosphate acetyltransferase0.47 -
 ygjL2,4-dienoyl-CoA reductase (NADPH), NADH and FMN-linked0.49 -

Pathogenesis and virulence
 vacBRibonuclease R, exoribonuclease R, RNase R2.26 -
 tolAColicin production2.26 -
 wcaLColanic acid biosynthesis; resistance to acid stress, desiccation, and thermal stress2.51 -
 ygeOHypothetical protein2.66 -

Phage, transposon, or plasmid
 sieBRac prophage; phage superinfection exclusion protein0.43 -
 LarRac prophage; restriction alleviation protein0.43 -
 ydaERac prophage; conserved protein0.44 -
 ydaQRac prophase; conserved protein0.45 -
 ydaCRac prophage predicted protein0.50 -
 ymfPE14 prophage; conserved protein4.46 -
 mprATranslational repressor mprA; plasmid related function3.53 -

Ribosomal proteins
 rpsU30S ribosomal protein S212.25 -
 rpsT30S ribosomal protein S202.35 -
 rplY50S ribosomal protein L252.35 -
 rpmF50S ribosomal protein L322.43 -
 rpmH50S ribosomal protein L342.52 -
 rplK50S ribosomal protein L112.67 -
 rpsR30S ribosomal protein S182.87 -
 rplA50S ribosomal protein L12.87 -
 rpmD50S ribosomal protein L303.17 -
 rpsJ30S ribosomal protein S103.24 -
 rpmE50S ribosomal protein L313.32 -
 rplW50S ribosomal protein L233.53 -
 rpsH30S ribosomal protein S84.34 -
 rplF50S ribosomal protein L64.57 -
 rplX50S ribosomal protein L244.66 -
 rpsN30S ribosomal protein S145.68 -

Stress response
 cspECold shock protein E2.02 -
 yfiACold shock protein, associated with 30S ribosomal subunit2.10 -
 htpXHeat shock protein2.10 -
 sulASOS cell division inhibitor2.17 -
 ymcECold shock gene2.33 -
 dnaK Heat shock protein; molecular chaperone2.48 -
 recARecombinase A; SOS response2.59 -
 rpoSResponse to organic acid stress and acetate induced acid tolerance; regulatory function2.68 -
 ahpCAlkyl hydroperoxide reductase C22 protein; oxidative stress2.91 -
 deadCold shock DEAD box protein A3.04 -
 rpoHRNA polymerase sigma factor; heat response3.19 -
 SpyEnvelope stress induced periplasmic protein3.54 -
 osmBOsmotic adaptation; Osmotically inducible lipoprotein B precursor4.77 -
 cspGCold shock protein5.04 -
 cpxPEnvelope stress response7.08 -
 cspACold shock protein cspA, major cold shock protein8.59 -

Transcription, RNA processing, and degradation
 rpoBDNA directed RNA polymerase beta subunit; transcription2.12 -
 rpoDHypothetical protein, RNA polymerase sigma factor2.20 -
 PnpPolyribonucleotide, nucleotidyltransferase; RNA processing2.21 -
 rpnARibonuclease P2.31 -
 RneRibonuclease E, fused ribonuclease E: endoribonuclease2.72 -
 rpoADNA-directed RNA polymerase alpha subunit; transcription2.92 -
 nusATranscription elongation factor NusA3.16 -
 RhoTranscription termination factor Rho3.34 -

Translation and posttranslational modification
 soxSRegulatory protein, DNA binding dual transcriptional regulator2.44 -
 tufAElongation factor Tu, protein chain elongation factor (EF-Tu)2.61 -
 infATranslation initiation factor IF-13.09 -
 infCTranslation initiation factor IF-33.31 -
 fusAElongation factor EF-23.36 -
 infBTranslation initiation factor IF-24.13 -

Transport and binding proteins
 phnOPhosphonate transport, N-acetyltransferase activity0.46 -
 treBPTS system, trehalose-specific IIBC component; transport of small molecules0.47 -
 malKMaltose/maltodextrin transport0.48 -
 thiQThiamine transport0.49 -
 fepBIron-enterobactin transporter subunit0.49 -
 cusBCopper efflux system protein2.02 -
 yjbBPhosphate transport, sodium dependent phosphate transporter2.07 -
 livJLeucine/isoleucine/valine transporter subunit2.22 -
 oppAOligopeptide transporter subunit2.32 -
 lolELipoprotein releasing system, transmembrane protein lolE2.32 -
 prlAPreprotein translocase; protein transport2.46 -
 glnHGlutamine ABC transporter, periplasmic-binding protein2.50 -
 artPArginine transport2.52 -
 fepDFerric enterobactin transport system3.25 -
 fepEFerric enterobactin transport protein3.85 -