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Table 1 Escherichia coli strains and plasmids used in this study

From: New function for Escherichia coli xanthosine phophorylase (xapA): genetic and biochemical evidences on its participation in NAD+ salvage from nicotinamide

Strains or plasmids

Genotypes and comments

Source or reference

Strain

DH5α

Routine cloning host

In-house collection

BW25113

rrnB3 ΔlacZ4787 hsdR514 Δ(araBAD)567 Δ(rhaBAD)568 rph-1

CGSC*

BW25113ΔnadC

BW25113 with chromosomal nadC deletion

This study

BW25113ΔnadC ΔpncA

BW25113 with chromosomal nadC and pncA deletion

This study

BW25113ΔnadC ΔpncA ΔxapA

BW25113 with chromosomal nadC, pncA, and xapA deletion

This study

BW25113ΔnadC ΔpncA ΔnadR

BW25113 with chromosomal nadC, pncA, and nadR deletion

This study

BW25113ΔnadC ΔpncA ΔxapA ΔnadR

BW25113 with chromosomal nadC, pncA, xapA and nadR deletion

This study

Plasmid

pKD13

Gene knockout procedure

CGSC*

pKD46

Gene knockout procedure

CGSC*

pCP20

Gene knockout procedure

CGSC*

pBAD-hisA

bla +

In-house collection

pBAD-EGFP

pBAD-hisA with EGFP gene

This study

pBAD-xapA

pBAD-hisA with xapA gene

This study

pET28a

Kana +

In-house collection

pET28-xapA

pET28a with xapA gene

This study

pEGFP-N2

Template for PCR amplification of EGFP gene

In-house collection

  1. *CGSC is the E. coli Genetic Stock Center of Yale University.