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Sequence to structure alignment in comparative modeling using prism

proteins: Structure, Function, and Bioinformatics 1999年第S3期37卷

作者： An-Suei Yang Barry Honig Columbia Genome Center and Department of Biochemistry and Molecular Biophysics Columbia University New York New York

prism (protein informatics system for modeling) is a protein analysis and modeling system in which informatics, alignment, modeling, and assessment modules are integrated in a computational environment where protein analysis and modeling protocols can be designed and assessed interactively. It can then be used automatically and repetitively in response to a variety of protein analysis and modeling problems. prism was used to predict a single model for each of the 43 targets in the CASP3 experiment. In this paper, we present results for 13 target sequences, which we consider to be comparative modeling targets with clearly related structural templates. We emphasize the problem of aligning a target sequence to a template structure with various alignment methods. When more than one alignment method and/or parameter set are applied, the final alignment is chosen on the basis of a model ranking system also used in prism's fold recognition module. Advanced sequence–template alignment procedures in prism are useful in some cases when standard pairwise dynamic programming algorithm fail to make any reasonable global alignment. The same procedures, however, failed in other cases, corresponding to remotely related query-template pairs that involved extensive insertions and deletions. proteins Suppl 1999;3:66–72. © 1999 Wiley-Liss, Inc.

关键词： protein structure modeling sequence-structure alignment prism: protein informatic system for modeling protein structure prediction sequence alignment error

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