Skip to main content

Table 3 Genetic elements with potential impact to virulence of pathogenic erwinias were summarized and the presence of the key genes is indicated for the analysed genomes (for details please see Additional file 3).

From: Genome comparison of the epiphytic bacteria Erwinia billingiae and E. tasmaniensis with the pear pathogen E. pyrifoliae

Functional context Description Key genes Ep1/96 Et1/99 Eb661
Secretion systems and effectors      
hrp/hsv/dsp cluster (T3SS) Hrp-associated enzymes (HAE) hrpK, hsvABC + - -
  Hrp/hrc secretion/translocation pathway hrcUTSRQ, hrpPO, hrcN;hrpQIJLXYSAB; hrcJ, hrpDEFG, hrcC, hrpTV + + -
  Hrp elicitor/effector region (HEE) hrpN, orfABC, hrpW, dspEF + + -
Salmonella SPI-1-like T3SS Invasion proteins invHFGEABCIJ (+) (+) -
  Surface presentation of antigens (SPA) spaOPQRST (+) (+) -
  Cell invasion proteins sicA, sipBCDA, sptP, prgHIJK, orgA (+) (+) -
  Invasion plasmid antigen (IPA) ipaBCDA - - -
T6SS T6S proteins and effectors various +* +* +*
Effector and virulence associated putative operon involved in virulence srfABC + + +
proteins Outer membrane protease sopA + - -
  Maintenance of virulence plasmid mvpT + + -
  Virulence protein; regulator for acidic stress; integral membrane protein, outer membrane protein msgA, phoPQ, mviN, ompX + + +
  Outer membrane invasion protein pagC + - +
  Virulence associated protein virK - + +
Metabolism      
Capsular polysaccharide systems Capsular polysaccharide- biosynthesis amsGHIABCDEFKL, galFE/cpsGHIABCDEFKL, galFE + +* +*
  Putative cps biosynthesis system ymcABC + + +
  Regulators rcsA, rcsB, rcsC, rcsF + + +
Levan-metabolism Levan synthesis lsc - + -
  Regulators rlsA, rlsB, rlsC + + -
Sorbitol-Operon Sorbitol uptake, metabolization srlAEBDMR + - +
Sucrose-Operon Sucrose uptake, metabolization scrKYABR + + -
Non-ribosomal peptide synth. Suggested phytotoxin eppT + - -
Adhesion & extracellular factors      
Cell-influencing factors Necrosis factors cnf1, cnf2 + + -
  Proteases ptrA, ptrB + + +
  Siderophores foxR, dfoA, alcA + + (+)
  1. The presence is weighted by three criteria: "+" completely present, "(+)" present in parts and "-" absent. An extended gene content by the presence of additional genes is marked by "*".