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Model preparation in MOLREP and examples of model improvement using X-ray data

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JournalActa crystallographica section d-Biological crystallography
DatePublished - 4 Jan 2008
Issue number1
Volume64
Number of pages7
Pages (from-to)33-39
Original languageEnglish

Abstract

The success of molecular replacement is critically dependent on the quality of the search model. Several model-preparation procedures are integrated in the molecular-replacement program MOLREP. These include model modification on the basis of amino-acid sequence alignment and model correction based on analysis of the solvent-accessibility of the atoms. The packing function used in MOLREP for the translational search is explained in the context of model preparation. In difficult cases, bioinformatics-based modifications are not sufficient for successful molecular replacement. An approach implemented in MOLREP for solving cases with translational noncrystallographic symmetry is an example of model preparation in which analysis of X-ray data plays an essential role. In addition, two examples are presented in which the X-ray data were used to refine partial models for subsequent use in molecular replacement.

    Research areas

  • MOLECULAR-REPLACEMENT, MAXIMUM-LIKELIHOOD, PROTEINS, PIPELINE, REFINEMENT, GENERATION, ALIGNMENT, SEARCH, SERVER

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