Premium
Twelve novel myosin VIIA mutations in 34 patients with Usher syndrome type I: Confirmation of genetic heterogeneity
Author(s) -
Janecke Andreas R.,
Meins Moritz,
Sadeghi Mojy,
Grundmann Kathrin,
ApfelstedtSylla Eckart,
Zrenner Eberhart,
Rosenberg Thomas,
Gal Andreas
Publication year - 1999
Publication title -
human mutation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.981
H-Index - 162
eISSN - 1098-1004
pISSN - 1059-7794
DOI - 10.1002/(sici)1098-1004(1999)13:2<133::aid-humu5>3.0.co;2-u
Subject(s) - biology , usher syndrome , genetics , genetic heterogeneity , myosin , mutation , gene , phenotype , microbiology and biotechnology , retinitis pigmentosa
Usher syndrome is a heterogeneous autosomal recessive trait and the most common cause of hereditary deaf‐blindness. Usher syndrome type I (USH1) is characterised by profound congenital sensorineural hearing loss, vestibular dysfunction, and prepubertal onset of retinitis pigmentosa. Of the at least six different loci for USH1, USH1B maps on chromosome 11q13, and the MYO7A gene has been shown to be defective in USH1B. MYO7A encodes myosin VIIA, an unconventional myosin, and it consists of 48 coding exons. In this study, MYO7A was analysed in 34 unrelated Usher type I patients by single‐strand conformation polymorphism analysis and direct sequencing. We identified a total of 12 novel and unique mutations, all single base changes. In addition, we found a previously reported nonsense mutation (C31X) on nine alleles of a total of six patients from Denmark. Hum Mutat 13:133–140, 1999. © 1999 Wiley‐Liss, Inc.