Download MendeleyCorrection of X-ray intensities from single crystals containing lattice-translocation defects
Wang, J., Kamtekar, S., Berman, A.J., Steitz, T.A.(2005) Acta Crystallogr D Biol Crystallogr 61: 67-74
- PubMed: 15608377
- DOI: https://doi.org/10.1107/S0907444904026721
- Primary Citation of Related Structures:
1XI1 - PubMed Abstract:
In 1954, Howells and colleagues described an unusual diffraction pattern from imidazole methemoglobin crystals caused by lattice-translocation defects. In these crystals, two identical lattices coexist as a single coherent mosaic block, but are translated by a fixed vector with respect to each other. The observed structure is a weighted sum of the two identical but translated structures, one from each lattice; the observed structure factors are a weighted vector sum of the two structure factors with identical unit amplitudes but shifted phases. A general procedure is described to obtain the unit amplitudes of observed structure factors from a realigned single lattice through an X-ray intensity correction. An application of this procedure is made to determine the crystal structure of phi29 DNA polymerase at 2.2 A resolution using multiple isomorphous replacement and multiwavelength anomalous dispersion methods.
Organizational Affiliation:
Department of Molecular Biophysics and Biochemistry, Yale University, 266 Whitney Avenue, New Haven, CT 06520-8114, USA. wang@mail.csb.yale.edu
