Primary Citation of Related Structures: 1JEM, 2HID
PubMed Abstract:
The histidine-containing protein (HPr) of bacterial phosphoenolpyruvate:sugar phosphotransferase system (PTS) serves a central role in a series of phosphotransfer reactions used for the translocation of sugars across cell membranes. These studies report the high-definition solution structures of both the unphosphorylated and histidine phosphorylated (P-His) forms of HPr from Bacillus subtilis ...
The histidine-containing protein (HPr) of bacterial phosphoenolpyruvate:sugar phosphotransferase system (PTS) serves a central role in a series of phosphotransfer reactions used for the translocation of sugars across cell membranes. These studies report the high-definition solution structures of both the unphosphorylated and histidine phosphorylated (P-His) forms of HPr from Bacillus subtilis. Consistent with previous NMR studies, local conformational adjustments occur upon phosphorylation of His 15, which positions the phosphate group to serve as a hydrogen bond acceptor for the amide protons of Ala 16 and Arg 17 and to interact favorably with the alpha-helix macrodipole. However, the positively charged side chain of the highly conserved Arg 17 does not appear to interact directly with phospho-His 15, suggesting that Arg 17 plays a role in the recognition of other PTS enzymes or in phosphotransfer reactions directly. Unlike the results reported for Escherichia coli P-His HPr (Van Nuland NA, Boelens R, Scheek RM, Robillard GT, 1995, J Mol Biol 246:180-193), our data indicate that phosphorylation of His 15 is not accompanied by adoption of unfavorable backbone conformations for active site residues in B. subtilis P-Ser HPr.
Related Citations:
Solution Structure of the Phosphocarrier Protein Hpr from Bacillus Subtilis by Two-Dimensional NMR Spectroscopy Wittekind, M., Rajagopal, P., Branchini, B.R., Reizer, J., Saier Junior, M.H., Klevit, R.E. (1992) Protein Sci 1: 1363
Sequence-Specific 1H NMR Resonance Assignments of Bacillus Subtilis Hpr: Use of Spectra Obtained from Mutants to Resolve Spectral Overlap Wittekind, M., Reizer, J., Klevit, R.E. (1990) Biochemistry 29: 7191
Common Structural Changes Accompany the Functional Inactivation of Hpr by Seryl Phosphorylation or by Serine to Aspartate Substitution Wittekind, M., Reizer, J., Deutscher, J., Saier, M.H., Klevit, R.E. (1989) Biochemistry 28: 9908
Organizational Affiliation:
University of Washington, Department of Biochemistry and Biomolecular Structure Center, Seattle 98195-7742, USA.
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