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1988:
Schüler D; Brimacombe R
The Escherichia coli 30S ribosomal subunit; an optimized three-dimensional fit between the ribosomal proteins and the 16S RNA.
The EMBO journal 1988;
7(
5):.
We have generated a computerized fit between the 3-dimensional map of the E.coli 30S ribosomal proteins, as determined by neutron scattering, and the recently published 3-dimensional model for the 16S RNA. To achieve this, the framework of coordinates for RNA-protein cross-link sites on the phosphate backbone in the RNA model was related to the corresponding framework of coordinates for the mass centres of the proteins by a least squares fitting procedure. The resulting structure, displayed on a computer graphics system, gives the first complete picture of the E.coli 30S ribosomal subunit showing both the proteins and the double-helical regions of the RNA. The root mean square distance between cross-link sites and protein centres is 32 A. The position of the mass centre of the combined double-helical regions was calculated from the model and compared with the position of the mass centre of the complete set of proteins. The two centres are displaced relative to one another by 20 A in the model structure, in good agreement with the experimental value of 25 A found by neutron scattering.
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