1. Mutational spectrum in the cardioauditory syndrome of Jervell and Lange-Nielsen.
- Author
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Tyson J, Tranebjaerg L, McEntagart M, Larsen LA, Christiansen M, Whiteford ML, Bathen J, Aslaksen B, Sørland SJ, Lund O, Pembrey ME, Malcolm S, and Bitner-Glindzicz M
- Subjects
- Amino Acid Substitution, Electrocardiography, Family, Frameshift Mutation, Heterozygote, Homozygote, Humans, KCNQ Potassium Channels, KCNQ1 Potassium Channel, Long QT Syndrome physiopathology, Models, Molecular, Mutation, Missense, Norway, Polymorphism, Single-Stranded Conformational, Potassium Channels chemistry, Protein Structure, Secondary, United Kingdom, White People, Hearing Loss, Sensorineural genetics, Long QT Syndrome genetics, Mutation, Potassium Channels genetics, Potassium Channels, Voltage-Gated
- Abstract
Jervell and Lange-Nielsen syndrome (JLNS) is an autosomal recessive syndrome characterised by profound congenital sensorineural deafness and prolongation of the QT interval on the electrocardiogram, representing abnormal ventricular repolarisation. In a study of ten British and Norwegian families with JLNS, we have identified all of the mutations in the KCNQ1 gene, including two that are novel. Of the nine mutations identified in this group of 10 families, five are nonsense or frameshift mutations. Truncation of the protein proximal to the recently identified C-terminal assembly domain is expected to preclude assembly of KCNQ1 monomers into tetramers and explains the recessive inheritance of JLNS. However, study of a frameshift mutation, with a dominant effect phenotypically, suggests the presence of another assembly domain nearer to the N-terminus.
- Published
- 2000
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