CRYBB1 mutation associated with congenital cataract and microcornea

Colin Willoughby, E. Heon, A. Chandna, C. Mok, A. Shafiq, W. Ferrini, L.L.Y. Chan, G. Billingsley, M. Priston, S. Kaye

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

The molecular characterization of a UK family with an autosomal dominant congenital cataract associated with microcornea is reported. METHODS: Family history and clinical data were recorded. This phenotype was linked to a 7.6 cM region of chromosome 22q11.2-q12.2, spanning the beta-crystallin gene cluster (ZMax of 3.91 for marker D22S1114 at theta=0). Candidate genes were PCR amplified and screened for mutations on both strands using direct sequencing. RESULTS: Sequencing of the coding regions and flanking intronic sequences of CRYBB2 and CRYBB1 showed the presence of a novel, heterozygous X253R change in exon 6 of CRYBB1. SSCP analysis confirmed that this sequence change segregated with the disease phenotype in all available family members and was not found in 109 ethnically matched controls. CONCLUSIONS: X253R is predicted to elongate the COOH-terminal extension of the protein and would be expected to disrupt beta-crystallin interactions. This is the first documented involvement of CRYBB1 in ocular development beyond cataractogenesis.
Original languageEnglish
Pages (from-to)587-593
Number of pages7
JournalMolecular Vision
Volume11
Publication statusPublished - 08 Aug 2005

ASJC Scopus subject areas

  • Ophthalmology

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