Solution Structure of Ribonuclease Hi from Escherichia ColiFujiwara, M., Kato, T., Yamazaki, T., Yamasaki, K., Nagayama, K.
(2000) Biol.Pharm.Bull. 23: 1147
- PubMed: 11041241
- PubMed Abstract:
- Complete Assignments of Magnetic Resonances of Ribonuclease H from Escherichia Coli by Double-and Triple-Resonance 2D and 3D NMR Spectroscopies
Yamazaki, T.,Yoshida, M.,Nagayama, K.
(1993) Biochemistry 32: 5656
- A New Version of Dadas (Distance Analysis in Dihedral Angle Space) and its Performance
Endo, S.,Wako, H.,Nagayama, K.,Go, N.
(1991) Computational Aspects of the Study of Biological Macromolecules by Nuclear Magnetic Resonance Spectroscopy (in: Nato Asi Ser.,Ser.A, V.225) --: 233
The solution structure of ribonuclease HI (RNase HI) from Escherichia coli (E. coli), a protein of 155 residues, was determined. Three-dimensional nuclear Overhauser enhancement spectroscopy (NOESY) was used to obtain 1,424 distance constraints betwe ...
The solution structure of ribonuclease HI (RNase HI) from Escherichia coli (E. coli), a protein of 155 residues, was determined. Three-dimensional nuclear Overhauser enhancement spectroscopy (NOESY) was used to obtain 1,424 distance constraints between individually assigned polypeptide chain hydrogen atoms. Supplemental geometric constraints of 90phi angles and 12chi1 angles, and the distance constraints of 66 hydrogen bonds were experimentally derived. Using the DADAS90 program that calculates structures in dihedral angle space, 15 structures satisfying almost all constraints were obtained. The average root mean square deviation (RMSD) from the mean structure was 0.75 A for backbone atoms. The RMSD for backbone atoms between the representative NMR structure with the smallest constraint violation and crystal structures was within 1.2 A. Although the NMR and crystal structures thus resemble one another, a significant discrepancy was observed in a region termed 'basic protrusion.' The discrepancy observed in NMR experiments is explained by fluctuation in this region.
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