Prediction of the phenotypic effects of non-synonymous single nucleotide polymorphisms using structural and evolutionary information - PubMed (original) (raw)
. 2005 May 15;21(10):2185-90.
doi: 10.1093/bioinformatics/bti365. Epub 2005 Mar 3.
Affiliations
- PMID: 15746281
- DOI: 10.1093/bioinformatics/bti365
Prediction of the phenotypic effects of non-synonymous single nucleotide polymorphisms using structural and evolutionary information
Lei Bao et al. Bioinformatics. 2005.
Abstract
Motivation: There has been great expectation that the knowledge of an individual's genotype will provide a basis for assessing susceptibility to diseases and designing individualized therapy. Non-synonymous single nucleotide polymorphisms (nsSNPs) that lead to an amino acid change in the protein product are of particular interest because they account for nearly half of the known genetic variations related to human inherited diseases. To facilitate the identification of disease-associated nsSNPs from a large number of neutral nsSNPs, it is important to develop computational tools to predict the phenotypic effects of nsSNPs.
Results: We prepared a training set based on the variant phenotypic annotation of the Swiss-Prot database and focused our analysis on nsSNPs having homologous 3D structures. Structural environment parameters derived from the 3D homologous structure as well as evolutionary information derived from the multiple sequence alignment were used as predictors. Two machine learning methods, support vector machine and random forest, were trained and evaluated. We compared the performance of our method with that of the SIFT algorithm, which is one of the best predictive methods to date. An unbiased evaluation study shows that for nsSNPs with sufficient evolutionary information (with not <10 homologous sequences), the performance of our method is comparable with the SIFT algorithm, while for nsSNPs with insufficient evolutionary information (<10 homologous sequences), our method outperforms the SIFT algorithm significantly. These findings indicate that incorporating structural information is critical to achieving good prediction accuracy when sufficient evolutionary information is not available.
Availability: The codes and curated dataset are available at http://compbio.utmem.edu/snp/dataset/
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