The three-dimensional structure of bovine angiogenin has been determined using two- and three-dimensional proton NMR spectroscopy. The solution structure is very close to that recently determined by X-ray diffraction analysis. This structure appears well defined, even if five loops and one helix exhibit greater flexibility ...
The three-dimensional structure of bovine angiogenin has been determined using two- and three-dimensional proton NMR spectroscopy. The solution structure is very close to that recently determined by X-ray diffraction analysis. This structure appears well defined, even if five loops and one helix exhibit greater flexibility. Analysis of the active site geometry confirms the position of the Glu-118 residue which obstructs the pyrimidine binding site. There is no experimental evidence of an unobstructed conformation of angiogenin in solution. In addition, it appears that the Glu-118 and Ser-119 residues and the cell receptor binding loop may play an important role in the differences of C-terminal fragment organization and ribonucleolytic activity observed between angiogenins and ribonuclease A.
Related Citations:
Proton Resonance Assignments and Secondary Structure of Bovine Angiogenin Reisdorf, C., Abergel, D., Bontems, F., Lallemand, J.Y., Decottignies, J.P., Spik, G. (1994) Eur J Biochem 224: 811
Organizational Affiliation:
Départment de Chimie-Synthèse Organique, URA 1308 du CNRS, Ecole Polytechnique, Palaiseau, France.
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