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SNPs, protein structure, and disease.

Z Wang1, J Moult

  • 1Center for Advanced Research in Biotechnology, University of Maryland Biotechnology Institute, Rockville, Maryland 20850, USA.

Human Mutation
|April 11, 2001
PubMed
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Single nucleotide polymorphisms (SNPs) cause inherited diseases by altering protein stability. Most disease-causing SNPs affect protein stability, while many population SNPs are neutral, potentially contributing to polygenic diseases.

Area of Science:

  • Genetics and Molecular Biology
  • Biochemistry
  • Human Disease Mechanisms

Background:

  • Inherited disease susceptibility is frequently linked to single nucleotide polymorphisms (SNPs).
  • The precise mechanisms by which SNPs influence disease remain largely unclear.
  • Understanding SNP effects at the protein level is crucial for deciphering disease etiology.

Purpose of the Study:

  • To investigate the functional impact of disease-associated missense mutations derived from SNPs.
  • To develop a predictive model for the mechanism of action of SNPs at the protein level.
  • To differentiate between disease-causing and neutral SNPs in the human population.

Main Methods:

  • Analysis of in vitro mutagenesis data for disease-causing and population SNPs.

Related Experiment Videos

  • Integration of protein structural context for each mutation.
  • Development and application of a model to assign protein-level mechanisms of action.

    • Main Results:

    • Ninety percent of examined disease-causing missense mutations align with the developed model.
    • The majority of disease-causing mutations impact protein stability via various energy-related factors.
    • Over 70% of SNPs from the general population were found to be neutral in their effect.

    Conclusions:

    • The study provides a mechanistic model for how SNPs cause disease, primarily through protein instability.
    • A significant portion of population SNPs may be neutral, but a subset could contribute to polygenic diseases.
    • This research enhances understanding of SNP functional effects and their role in human health and disease.