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Predicting Deleterious Amino Acid Substitutions

Ng, Pauline C., Henikoff, Steven·2001·Genome Research

Abstract

Many missense substitutions are identified in single nucleotide polymorphism (SNP) data and large-scale random mutagenesis projects. Each amino acid substitution potentially affects protein function. We have constructed a tool that uses sequence homology to predict whether a substitution affects protein function. SIFT, which s orts i ntolerant f rom t olerant substitutions, classifies substitutions as tolerated or deleterious. A higher proportion of substitutions predicted to be deleterious by SIFT gives an affected phenotype than substitutions predicted to be deleterious by substitution scoring matrices in three test cases. Using SIFT before mutagenesis studies could reduce the number of functional assays required and yield a higher proportion of affected phenotypes. SIFT may be used to identify plausible disease candidates among the SNPs that cause missense substitutions.

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  • Functional prediction algorithms (8 of 10), including SIFT and PolyPhen, considered p.Gln55Arg benign and tolerated, with only Mutation taster and LRT scoring this change as deleterious.

    “Functional prediction algorithms (8 of 10), including SIFT33 and PolyPhen34, considered this change to be benign and tolerated, with only Mutation taster35 and LRT36 scoring this change as deleterious.”

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Metadata

Authors
Ng, P. C., & Henikoff, S.
Venue
Genome Research
Published
2001-05-01
Volume
11
Issue
5
Pages
863-874
ISSN
  • 1088-9051
  • 1549-5469
Cited by
2,368
References
2
Language
en

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