The str operon of Escherichia coli contains genes for ribosomal proteins S12 and S7 and for elongation factors EF-G and EF-Tu (Jaskunas et al. 1975). We have subcloned various segments of DNA from this operon onto multicopy plasmids. We found that cells carrying a recombinant plasmid which lacks the
Solving the structure of Escherichia coli elongation factor Tu using a twinned data set
β Scribed by Heffron, Susan E. ;Moeller, Rhonda ;Jurnak, Frances
- Book ID
- 104478199
- Publisher
- International Union of Crystallography
- Year
- 2006
- Tongue
- English
- Weight
- 727 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0907-4449
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β¦ Synopsis
Escherichia coli elongation factor Tu-GDP (EF-Tu-GDP) was crystallized in the presence of novel inhibitors. The only crystals which could be grown were epitaxially as well as merohedrally twinned, highly mosaic and diffracted to a resolution of 3.4 A Λin space group P3 1 21, with unit-cell parameters a = b = 69.55, c = 169.44 A Λ, = = 90, = 120 . To determine whether an inhibitor was present in the crystal, a poor-quality X-ray diffraction data set had to be processed. The three-dimensional structure was ultimately solved and the original question answered. The results also reveal a new type of dimer packing for EF-Tu-GDP.
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