Understanding human disease mutations through the use of interspecific genetic variation

Mark P. Miller, Sudhir Kumar

Research output: Contribution to journalArticle

222 Citations (Scopus)

Abstract

Data on replacement mutations in genes of disease patients exist in a variety of online resources. In addition, genome sequencing projects and individual gene sequencing efforts have led to the identification of disease gene homologs in diverse metazoan species. The availability of these two types of information provides unique opportunities to investigate factors that are important in the development of genetically based disease by contrasting long and short-term molecular evolutionary patterns. Therefore, we conducted an analysis of disease-associated human genetic variation for seven disease genes: the cystic fibrosis transmembrane conductance regulator, glucose-6-phosphate dehydrogenase, the neural cell adhesion molecule L1, phenylalanine hydroxylase, paired box 6, the X-linked retinoschisis gene and TSC2/tuberin. Our analyses indicate that disease mutations show definite patterns when examined from an evolutionary perspective. Human replacement mutations resulting in disease are over-abundant at amino acid positions most conserved throughout the long-term history of metazoans. In contrast, human polymorphic replacement mutations and silent mutations are randomly distributed across sites with respect to the level of conservation of amino acid sites within genes. Furthermore, disease-causing amino acid changes are of types usually not observed among species. Using Grantham's chemical difference matrix, we find that amino acid changes observed in disease patients are far more radical than the variation found among species and in non-diseased humans. Overall, our results demonstrate the usefulness of evolutionary analyses for understanding patterns of human disease mutations and underscore the biomedical significance of sequence data currently being generated from various model organism genome sequencing projects.

Original languageEnglish (US)
Pages (from-to)2319-2328
Number of pages10
JournalHuman Molecular Genetics
Volume10
Issue number21
StatePublished - Nov 1 2001

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Mutation
Amino Acids
Genes
Neural Cell Adhesion Molecule L1
Retinoschisis
Genome
Phenylalanine Hydroxylase
Cystic Fibrosis Transmembrane Conductance Regulator
X-Linked Genes
Glucosephosphate Dehydrogenase
Medical Genetics

ASJC Scopus subject areas

  • Genetics

Cite this

Understanding human disease mutations through the use of interspecific genetic variation. / Miller, Mark P.; Kumar, Sudhir.

In: Human Molecular Genetics, Vol. 10, No. 21, 01.11.2001, p. 2319-2328.

Research output: Contribution to journalArticle

Miller, Mark P. ; Kumar, Sudhir. / Understanding human disease mutations through the use of interspecific genetic variation. In: Human Molecular Genetics. 2001 ; Vol. 10, No. 21. pp. 2319-2328.
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