Determination of the three-dimensional solution structure of the histidine-containing phosphocarrier protein HPr from Escherichia coli using multidimensional NMR spectroscopy.
We recorded several types of heteronuclear three-dimensional (3D) NMR spectra on 15N-enriched and 13C/15N-enriched histidine-containing phosphocarrier protein, HPr, to extend the backbone assignments [van Nuland, N. A. J., van Dijk, A. A., Dijkstra, K., van Hoesel, F. H. J., Scheek, R. M. & Robillard, G. T. (1992) Eur. J. Biochem, 203, 483-491] to the side-chain 1H,15N and 13C resonances. From both 3D heteronuclear 1H-NOE 1H-13C and 1H-NOE 1H-15N multiple-quantum coherence (3D-NOESY-HMQC) and two-dimensional (2D) homonuclear NOE spectra, more than 1200 NOE were identified and used in a step-wise structure refinement process using distance geometry and restrained molecular dynamics involving a number of new features. A cluster of nine structures, each satisfying the set of NOE restraints, resulted from this procedure. The average root-mean-square positional difference for the C alpha atoms is less than 0.12 nm. The secondary structure topology of the molecule is that of an open-face beta sandwich formed by four antiparallel beta strands packed against three alpha helices, resembling the recently published structure of Bacillus subtilis HPr, determined by X-ray crystallography [Herzberg, O., Reddy, P., Sutrina, S., Saier, M. H., Reizer, J. & Kapafia, G. (1992) Proc. Natl, Acad. Sci. USA 89, 2499-2503).
van Nuland
N A
NA
Bioson Research Institute, University of Groningen, The Netherlands.
Grötzinger
J
J
Dijkstra
K
K
Scheek
R M
RM
Robillard
G T
GT
D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry*; D002247:Carbon Isotopes; D004926:Escherichia coli / Q000378:metabolism*; D006859:Hydrogen; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008958:Models, Molecular; D008969:Molecular Sequence Data; D009587:Nitrogen Isotopes; D010731:Phosphoenolpyruvate Sugar Phosphotransferase System / Q000737:chemistry*; D011487:Protein Conformation; D017510:Protein Folding
D001426:Bacterial Proteins; D002247:Carbon Isotopes; D009587:Nitrogen Isotopes; D006859:Hydrogen; D010731:Phosphoenolpyruvate Sugar Phosphotransferase System; C030182:phosphocarrier protein HPr