Abstract
Congenital cataracts are an important cause of bilateral visual impairment in infants. In a four-generation family of English descent, we mapped dominant congenital posterior polar cataract to chromosome 11q22-q22.3. The maximum LOD score, 3.92 at recombination fraction 0, was obtained for marker D11S898, near the gene that encodes crystallin alpha-B protein (CRYAB). By sequencing the coding regions of CRYAB, we found in exon 3 a deletion mutation, 450delA, that is associated with cataract in this family. The mutation resulted in a frameshift in codon 150 and produced an aberrant protein consisting of 184 residues. This is the first report of a mutation, in this gene, resulting in isolated congenital cataract.
Original language | English |
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Pages (from-to) | 1141-5 |
Number of pages | 5 |
Journal | American Journal of Human Genetics |
Volume | 69 |
Issue number | 5 |
DOIs | |
Publication status | Print publication - Nov 2001 |
Externally published | Yes |
Bibliographical note
Copyright © 2001 The American Society of Human Genetics. Published by Elsevier Inc. All rights reserved.Keywords
- Amino Acid Sequence
- Base Sequence
- Cataract/congenital
- Child
- Chromosome Mapping
- Chromosomes, Human, Pair 11/genetics
- Crystallins/chemistry
- England/ethnology
- Exons/genetics
- Female
- Frameshift Mutation/genetics
- Genes, Dominant/genetics
- Genetic Markers/genetics
- Humans
- Lod Score
- Male
- Molecular Sequence Data
- Pedigree
- Sequence Alignment
- Sequence Deletion/genetics