M. Van Bibber et al., A new class of cobalamin transport mutants (btuF) provides genetic evidence for a periplasmic binding protein in Salmonella typhimurium, J BACT, 181(17), 1999, pp. 5539-5541
No periplasmic binding protein has been demonstrated for the ATP-binding ca
ssette (ABC)-type cobalamin transporter BtuCD. New mutations (btuF) are des
cribed that affect inner-membrane transport. The BtuF protein has a signal
sequence and resembles the periplasmic binding proteins of several other AB
C transporters.