Table 1 Strains used in this study

RIB40

Wild type

Machida et al. (2005)

∆ligD::sC

NS4^a

sC ^-, niaD ^-, ∆ligD::sC

Mizutani et al. (2008)

ustR ^EX-G101

∆ligD::sC

sC, niaD ^-, ∆ligD::sC, PglaA142-ustR::niaD

This study

ustR ^EX-G301

∆ligD::sC

sC, niaD ^-, ∆ligD::sC, PglaA142-ustR::niaD

This study

∆kexB

niaD300^b

niaD ^-, ∆kexB::ptrA

Kindly provided by Dr. Y. Yamagata

ustR ^EX/∆kexB

∆kexB

niaD ^-, ∆kexB::ptrA, PglaA142-ustR::niaD

This study

NSlD-∆P10

NSPlD-tApEnBdIVdVaApApAapAd1

sC, niaD ^-, adeA ^-, ∆argB::adeA ^-, ∆ligD::argB, ∆pyrG::adeA, ∆tppA, ∆pepE, ∆nptB, ∆dppIV, ∆dppV, ∆alpA, ∆pepA, ∆AopepAa, ∆AopepAd, ∆cpI::pyrG

Yoon et al. (2011)

ustR ^EX/∆P10

NSlD-∆P10

sC, niaD ^-, adeA ^-, ∆argB::adeA ^-, ∆ligD::argB, ∆pyrG::adeA, ∆tppA, ∆pepE, ∆nptB, ∆dppIV, ∆dppV, ∆alpA, ∆pepA, ∆AopepAa, ∆AopepAd, ∆cpI::pyrG, PglaA142-ustR::niaD

This study