Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

A novel mutation in the IHH gene causes brachydactyly type A1: a 95-year-old mystery resolved

Abstract.

Brachydactyly type A1 (BDA1) was the first disorder described in terms of autosomal dominant Mendelian inheritance. Early in the 1900s Farabee and Drinkwater described a number of families with BDA1. Examination of two of Drinkwater's families has revealed that, although they are not known to be related, both share a common mutation within the Indian hedgehog gene (IHH). This novel mutation is a guanine to adenine transition at nucleotide 298, resulting in an Asn100Asp amino acid substitution. Both families demonstrate significant intrafamilial phenotypic heterogeneity among the affected individuals. Examination of single nucleotide polymorphisms (SNP) has shown that the affected individuals in both families share SNPs within IHH consistent with that of a common founder. The identification of the same mutation in these families has answered a question that is nearly a century old about the genetic cause of their disease and supports the hypothesis that IHH plays a pivotal role in normal human skeletogenesis.

This is a preview of subscription content, log in to check access.

Author information

Additional information

Electronic Publication

Rights and permissions

Reprints and Permissions

About this article

Cite this article

McCready, E.M., Sweeney, E., Fryer, A.E. et al. A novel mutation in the IHH gene causes brachydactyly type A1: a 95-year-old mystery resolved. Hum Genet 111, 368–375 (2002). https://doi.org/10.1007/s00439-002-0815-2

Download citation

Keywords

  • Nucleotide
  • Single Nucleotide Polymorphism
  • Adenine
  • Pivotal Role
  • Guanine