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:
Structural Consequences of Histidine Phosphorylation: NMR Characterization of the Phosphohistidine Form of Histidine-Containing Protein from Bacillus Subtilis and Escherichia Coli Rajagopal, P., Waygood, E.B., Klevit, R.E. (1994) Biochemistry 33: 15271
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
Organizational Affiliation:
University of Washington, Department of Biochemistry and Biomolecular Structure Center, Seattle 98195-7742, USA.
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