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Table 4 B. cenocepacia K56-6 deletion mutants and their phenotype

From: Spontaneous and evolutionary changes in the antibiotic resistance of Burkholderia cenocepacia observed by global gene expression analysis

Mutant name

Gene(s) deleted

Gene annotation

Relevant experiment/microarray observation

Phenotypea

K56-2ΔL1755-6

BCAL1755

BCAL1756

Hypothetical protein

Phosphohydrolase

Upregulated in the presence of amikacin, in J2315-A and in BCC1617

None observed

K56-2ΔM0831

BCAM0831

ABC transporter

Upregulated in the presence of amikacin

None observed

K56-2ΔS0293-2

BCAS0292

BCAS0293

Hypothetical protein

Nematocidal protein AidA

Upregulated in the presence of TMP/SMX

None observed

K56-2ΔM0924

BCAM0924

Response regulator protein

Upregulated in the presence of chlorpromazine

None observed

K56-2ΔM0925-7

BCAM0925

BCAM0296

BCAM0297

Multidrug efflux system OMP

Multidrug efflux system protein

Multidrug efflux system protein

Upregulated in the presence of chlorpromazine

Increased susceptibility for chlorhexidine (14 μg/ml, wt 22 μg/ml)

Increased susceptibility for azithromycin (100 μg/ml, wt 150 μg/ml)

Decreased growth rate in the presence of 1.0 mM chlorpromazine (μ = 0.49, wt μ = 0.55)

K56-2ΔM2186-8

BCAM2186

BCAM2187

BCAM2188

Efflux system transport protein

ABC-type efflux carrier protein

Outer membrane efflux protein

Upregulated in the presence of chlorpromazine

None observed

K56-2ΔS0167

BCAS0167

Squalene-hopene cyclase

Upregulated in the presence of chlorpromazine

Increased susceptibility for chlorhexidine (13 μg/ml, wt 22 μg/ml)

Decreased growth rate in the presence of 1.0 mM chlorpromazine (μ = 0.62, wt μ = 0.80)

K56-2ΔS0081

BCAS0081

ABC transporter

Upregulated in outbreak strains BCC1616 and BCC1617

Increased susceptibility for chlorhexidine (14 μg/ml, wt 22 μg/ml)

Increased susceptibility for tetracycline (100 μg/ml, wt 150 μg/ml)

  1. a The following antibiotics and antimicrobials were tested on all mutants, except K56-2ΔS0167: amikacin, tobramycin, meropenem, ceftazidime, trimethoprim, azithromycin, erythromycin, levofloxacin, tetracycline, chloramphenicol, chlorhexidine