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Nucleic Acids Research, 1980, Vol. 8, No. 24 6221-6231
© 1980

CHEMISTRY

The conformation of a large RNA fragment from the E.coli ribosomal 16S-RNA. An X-ray and neutron small-angle scattering study

Ragnar Österberg*, Bo Sjöberg*, Roger A. Garrett+ and Reinhold Müller{dagger}

*Department of Medical Biochemistry S-400 33 Göteborg, Sweden +Department of Chemistry, University of Arhus Denmark {dagger}Max-Planck-Institute für Molekulare Genetik Abt. Wittman, Berlin-33, GFR

Received September 30, 1980. A large 12S RNA fragment which constitutes the 5' two-thirds of 16S-RNA from the E. coil 30S subunit has been investigated by small-angle X-ray and neutron scattering.

The results indicate that in reconstitution buffer the 12S-RNA fragment has a molecular weight of 270,000 ± 20,000 and a radius of gyration of 7.1 nm. The scattering data are compatible with the RNA being folded into two major domains with the shapes of two adjacent, quite similar cylinders.


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