Encyclopedia of Biophysics

Living Edition
| Editors: Gordon Roberts, Anthony Watts, European Biophysical Societies

Structural Impact of Single Nucleotide Variations (SNVs)

  • Andrew C. R. Martin
  • Anja Baresic
  • Nouf S. Al-Numair
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-35943-9_430-1



The simplest form of mutation is a single DNA base change, frequently, though somewhat inaccurately, referred to as a “single-nucleotide polymorphism” (SNP). Strictly, this term should only be applied to single base changes that are observed in at least 1% of a “normal” population, and the term “single-nucleotide variation” (SNV) should be used for the more general case. Thus SNVs may, or may not, have an impact on phenotype, and this impact may be inherited in a Mendelian fashion. “Penetrance” is defined as the percentage of individuals having a particular SNV who show the associated phenotype. Mutations inherited in a Mendelian fashion, whether dominant or recessive, have 100% penetrance, but SNVs may also exhibit “partial penetrance”...

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Copyright information

© European Biophysical Societies' Association (EBSA) 2018

Authors and Affiliations

  • Andrew C. R. Martin
    • 1
  • Anja Baresic
    • 1
    • 2
  • Nouf S. Al-Numair
    • 1
    • 3
  1. 1.Institute of Structural and Molecular Biology, Division of BiosciencesUniversity College LondonLondonUK
  2. 2.Computational Regulatory Genomics GroupMRC London Institute of Medical SciencesLondonUK
  3. 3.Department of GeneticsKing Faisal Specialist Hospital and Research CentreRiyadhSaudi Arabia

Section editors and affiliations

  • Franca Fraternali

There are no affiliations available