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Table 1 Bacterial strains and plasmids used in this work

From: Pseudomonas 2.0: genetic upgrading of P. putida KT2440 as an enhanced host for heterologous gene expression

Strain or plasmid

Relevant characteristics a

Reference or source

Escherichia coli

DH5α

Cloning host; F− λ− endA1 glnX44(AS) thiE1 recA1 relA1 spoT1 gyrA96(NalR) rfbC1 deoR nupG Φ80(lacZΔM15) Δ(argF-lac)U169 hsdR17(r K − m K +)

[60]

DH5α λpir

Cloning host; λpir lysogen of strain DH5α

[61]

HB101

Helper strain; F− λ− hsdS20(r B − m B −) recA13 leuB6(Am) araC14 Δ(gpt-proA)62 lacY1 galK2(Oc) xyl-5 mtl-1 thiE1 rpsL20(SmR) glnX44(AS)

[62]

Pseudomonas putida

KT2440

Wild-type strain; mt-2 derivative cured of the TOL plasmid pWW0

[52]

KT2440 Δall-Φ

KT2440 derivative; Δprophage1 Δprophage4 Δprophage3 Δprophage2

[36]

EM42

KT2440 derivative; Δprophage1 Δprophage4 Δprophage3 Δprophage2 ΔTn7 ΔendA-1 ΔendA-2 ΔhsdRMS Δflagellum ΔTn4652

This work

EM383

KT2440 derivative; EM42 ΔrecA

This work

Plasmids

pRK600

Helper plasmid used for conjugation; oriV(ColE1), RK2(mob + tra +); CmR

[63]

pEMG

Plasmid used for deletions; oriV(R6K), lacZα fragment with two flanking I-SceI recognition sites; KmR

[58]

pSW-I

Helper plasmid used for deletions; oriV(RK2), xylS, Pm→I-SceI; ApR

[64]

pEMG-Tn7

pEMG bearing an 1.6-kb TS1-TS2 EcoRI-XmaI insert for deleting the PP5404-PP5407 operon

This work

pEMG-endA-1

pEMG bearing an 1-kb TS1-TS2 XmaI-BamHI insert for deleting the endA-1 gene

This work

pEMG-endA-2

pEMG bearing an 1-kb TS1-TS2 EcoRI-BamHI insert for deleting the endA-2 gene

This work

pEMG-hsdRMS

pEMG bearing an 1.3-kb TS1-TS2 EcoRI-BamHI insert for deleting the hsdRMS operon

This work

pEMG-flagella

pEMG bearing an 1.5-kb TS1-TS2 EcoRI-BamHI insert for deleting the flagellar operon

[57]

pEMG-Tn4652

pEMG bearing an 1-kb TS1-TS2 XmaI-BamHI insert for deleting the Tn4652 transposon

This work

pEMG-recA

pEMG bearing an 1-kb TS1-TS2 EcoRI-BamHI insert for deleting the recA gene

[36]

pSEVA221

Cloning vector; oriV(RK2); standard multiple cloning site; KmR

[65]

pSEVA251

Cloning vector; oriV(RFS1010); standard multiple cloning site; KmR

[65]

pGL-XP

Expression plasmid; oriV(pBBR1), oriT, xylS, Pm→gfp-luxCDABE; KmR SmR

Benedetti et al., in preparation

  1. aAntibiotic markers: Ap, ampicillin; Cm, chloramphenicol; Km, kanamycin; Nal, nalidixic acid; Sm, streptomycin.