The crystal structure of the Yersinia enterocolitica molecular-chaperone protein SycE, which specifically binds the YopE protein, has been solved to 2.0 A resolution by molecular replacement. The crystal contains two SycE dimers per asymmetric unit; a novel feature of this crystal, when compared with closely related SycE structures, is a well ordered carboxy-terminal peptide in one protomer of each dimer ...
The crystal structure of the Yersinia enterocolitica molecular-chaperone protein SycE, which specifically binds the YopE protein, has been solved to 2.0 A resolution by molecular replacement. The crystal contains two SycE dimers per asymmetric unit; a novel feature of this crystal, when compared with closely related SycE structures, is a well ordered carboxy-terminal peptide in one protomer of each dimer. The peptide binds a hydrophobic patch of a neighboring molecule in a manner similar to that seen in a SycE-YopE chaperone-target complex, suggestive of low-affinity 'self-binding' through which the carboxy-terminal peptide might suppress counterproductive interactions with non-target proteins in vivo.
Related Citations:
Structure of the Yersinia Type III Secretory System
Chaperone Syce Birtalan, S., Ghosh, P. (2001) Nat Struct Biol 8: 974
Three-Dimensional Structure of the Type III Secretion
Chaperone SycE from Yersinia Pestis Evdokimov, A.G., Tropea, J.E., Routzahn, K.M., Waugh, D.S. (2002) Acta Crystallogr D Biol Crystallogr 58: 398
Three-Dimensional Secretion Signals in
Chaperone-Effector Complexes of Bacterial Pathogens Birtalan, S.C., Phillips, R.M., Ghosh, P. (2002) Mol Cell 9: 971
Organizational Affiliation:
Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA.
Download Mendeley
