DtpB (YhiP) and DtpA (TppB, YdgR) are prototypical proton-dependent peptide transporters of Escherichia coli.

@article{Harder2008DtpBA,
  title={DtpB (YhiP) and DtpA (TppB, YdgR) are prototypical proton-dependent peptide transporters of Escherichia coli.},
  author={Daniel K. Harder and Juergen Stolz and Fabio Casagrande and Petr Obrdl{\'i}k and Dietmar Weitz and Dimitrios I. Fotiadis and Hannelore Daniel},
  journal={The FEBS journal},
  year={2008},
  volume={275 13},
  pages={3290-8}
}
The genome of Escherichia coli contains four genes assigned to the peptide transporter (PTR) family. Of these, only tppB (ydgR) has been characterized, and named tripeptide permease, whereas protein functions encoded by the yhiP, ybgH and yjdL genes have remained unknown. Here we describe the overexpression of yhiP as a His-tagged fusion protein in E. coli and show saturable transport of glycyl-sarcosine (Gly-Sar) with an apparent affinity constant of 6.5 mm. Overexpression of the gene also… CONTINUE READING

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