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Updated: Aug 23, 2026

Biochemical and Structural Characterization of the Carbohydrate Transport Substrate-binding-protein SP0092
Published on: October 2, 2017
A method for processing diffraction data from twinned protein crystals and its application in the structure
G Lu1, Y Lindqvist, G Schneider
1Swedish University of Agricultural Science, Department of Molecular Biology, Uppsala Biomedical Center, Sweden.
Abstract:
A general method to deconvolute oscillation data sets from twinned protein crystals to a corresponding single-crystal data set has been developed and applied to diffraction data measured from crystals of a fragment containing the FAD- and NADH-binding domains of nitrate reductase. The procedure allows straightforward processing of diffraction data from twinned crystals. Typically, R(merge) values of reduced data sets from the nitrate reductase crystals after deconvolution are about 0.06 compared to 0.13 and higher before deconvolution. Based on these deconvoluted data sets, the structure of the FAD- and NADH-binding domains of nitrate reductase could be solved successfully. The result indicates that crystal twinning does not necessarily prevent crystallographic structure determination.
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