Identification of a new SCN5A mutation, D1840G, associated with the long QT syndrome. Mutations in brief no. 153. Online.

J. Benhorin, M. Goldmit, J. W. MacCluer, J. Blangero, R. Goffen, A. Leibovitch, A. Rahat, Q. Wang, A. Medina, Jeffrey Towbin, B. Kerem

Research output: Contribution to journalArticle

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Abstract

The long QT syndrome (LQT) is an inherited cardiac disorder that can cause sudden cardiac death among apparently healthy young individuals due to malignant ventricular arrhythmias. LQT was found to be caused by mutations in four genes LTQ1, LQT2, LQT3 and LQT5, and linkage was reported for an additional locus, LQT4, on chromosome 4q25-27. We have studied a large (n=131) LQT-affected Jewish kindred and identified tight linkage between the LQT-affected status and LQT3 (lod score 6.13, with an estimated recombination fraction of zero). We identified a new point-mutation, A to G substitution at nucleotide 5519 of the SCN5A gene, changing the aspartate 1840 to glycine, D1840G. This is a non-conservative change of an amino acid completely conserved in sodium channels from Molusca to human. The mutation was identified in all affected individuals (n=23), and not identified in all the unaffected family members (n=40), and not in 200 chromosomes of healthy control individuals. The mutation was identified in 3/12 individuals with equivocal phenotype, thus, providing an accurate dignostic tool for all family members. This mutation is currently being used in a cellular electrophysiological model, to characterize the function of the mutated sodium channel in this syndrome.

Original languageEnglish (US)
Number of pages1
JournalHuman Mutation
Volume12
Issue number1
StatePublished - Jan 1 1998
Externally publishedYes

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Long QT Syndrome
Mutation
Sodium Channels
Chromosomes
Lod Score
Sudden Cardiac Death
Point Mutation
Aspartic Acid
Glycine
Genetic Recombination
Genes
Cardiac Arrhythmias
Nucleotides
Phenotype
Amino Acids

All Science Journal Classification (ASJC) codes

  • Genetics
  • Genetics(clinical)

Cite this

Benhorin, J., Goldmit, M., MacCluer, J. W., Blangero, J., Goffen, R., Leibovitch, A., ... Kerem, B. (1998). Identification of a new SCN5A mutation, D1840G, associated with the long QT syndrome. Mutations in brief no. 153. Online. Human Mutation, 12(1).

Identification of a new SCN5A mutation, D1840G, associated with the long QT syndrome. Mutations in brief no. 153. Online. / Benhorin, J.; Goldmit, M.; MacCluer, J. W.; Blangero, J.; Goffen, R.; Leibovitch, A.; Rahat, A.; Wang, Q.; Medina, A.; Towbin, Jeffrey; Kerem, B.

In: Human Mutation, Vol. 12, No. 1, 01.01.1998.

Research output: Contribution to journalArticle

Benhorin, J, Goldmit, M, MacCluer, JW, Blangero, J, Goffen, R, Leibovitch, A, Rahat, A, Wang, Q, Medina, A, Towbin, J & Kerem, B 1998, 'Identification of a new SCN5A mutation, D1840G, associated with the long QT syndrome. Mutations in brief no. 153. Online.', Human Mutation, vol. 12, no. 1.
Benhorin J, Goldmit M, MacCluer JW, Blangero J, Goffen R, Leibovitch A et al. Identification of a new SCN5A mutation, D1840G, associated with the long QT syndrome. Mutations in brief no. 153. Online. Human Mutation. 1998 Jan 1;12(1).
Benhorin, J. ; Goldmit, M. ; MacCluer, J. W. ; Blangero, J. ; Goffen, R. ; Leibovitch, A. ; Rahat, A. ; Wang, Q. ; Medina, A. ; Towbin, Jeffrey ; Kerem, B. / Identification of a new SCN5A mutation, D1840G, associated with the long QT syndrome. Mutations in brief no. 153. Online. In: Human Mutation. 1998 ; Vol. 12, No. 1.
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