Primary Citation of Related Structures:   1TIF, 1TIG
PubMed Abstract: 
The structures of the two domains of translational initiation factor IF3 from Bacillus stearothermophilus have been solved by X-ray crystallography using single wavelength anomalous scattering and multiwavelength anomalous diffraction. Each of the two domains has an alpha/beta topology, with an exposed beta-sheet that is reminiscent of several ribosomal and other RNA binding proteins ...
The structures of the two domains of translational initiation factor IF3 from Bacillus stearothermophilus have been solved by X-ray crystallography using single wavelength anomalous scattering and multiwavelength anomalous diffraction. Each of the two domains has an alpha/beta topology, with an exposed beta-sheet that is reminiscent of several ribosomal and other RNA binding proteins. An alpha-helix that protrudes out from the body of the N-terminal domain towards the C-terminal domain suggests that IF3 consists of two RNA binding domains connected by an alpha-helix and that it may bridge two regions of the ribosome. This represents the first high resolution structural information on a translational initiation factor.
Related Citations: 
Prokaryotic Translation Initiation Factor If3 is an Elongated Protein Consisting of Two Crystallizable Domains Kycia, J.H., Biou, V., Shu, F., Gerchman, S.E., Graziano, V., Ramakrishnan, V. (1995) Biochemistry 34: 6183
Organizational Affiliation: 
Biology Department, Brookhaven National Laboratory, Upton, NY 11973, USA.