Virulence of pathogenic bacteria of the genus Yersinia requires the injection of six effector proteins into the cytoplasm of host cells. The amino-terminal domain of one of these effectors, the tyrosine phosphatase YopH, is essential for translocation of YopH, as well as for targeting it to phosphotyrosine-containing substrates of the type pYxxP. We report the high-resolution solution structure of the N-terminal domain (residues 1-129) from the Yersinia pseudotuberculosis YopH (YopH-NT) in complex with N-acetyl-DEpYDDPF-NH(2), a peptide derived from an in vivo protein substrate. In contrast to the domain-swapped dimer observed in a crystal structure of the same protein (Smith, C. L., Khandelwal, P., Keliikuli, K., Zuiderweg, E. R. P., and Saper, M. A. (2001) Mol. Microbiol. 42, 967-979), YopH-NT is monomeric in solution. The peptide binding site is located on a beta-hairpin that becomes the crossover point in the dimer structure. The binding site has several characteristics that are reminiscent of SH2 domains, which also bind to pYxxP sequences.
Solution structure and phosphopeptide binding to the N-terminal domain of Yersinia YopH: comparison with a crystal structure.,Khandelwal P, Keliikuli K, Smith CL, Saper MA, Zuiderweg ER Biochemistry. 2002 Sep 24;41(38):11425-37. PMID:12234185
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
↑ Khandelwal P, Keliikuli K, Smith CL, Saper MA, Zuiderweg ER. Solution structure and phosphopeptide binding to the N-terminal domain of Yersinia YopH: comparison with a crystal structure. Biochemistry. 2002 Sep 24;41(38):11425-37. PMID:12234185