Autosomal dominant cerulean cataract is associated with a chain termination mutation in the human beta-crystallin gene CRYBB2

Hum Mol Genet. 1997 May;6(5):665-8. doi: 10.1093/hmg/6.5.665.


Congenital cataracts are a common major abnormality of the eye that frequently cause blindness in infants. At least a third of all cases are familial; autosomal dominant congenital cataract (ADCC) appears to be the most common familial form in the Western world. Cerulean cataracts have peripheral bluish and white opacifications in concentric layers with occasional central lesions arranged radially. Although the opacities may be observed during fetal development and childhood, usually visual acuity is only mildly reduced until adulthood, when lens extraction is generally necessary. We have been studying a family (ADCC-1) with cerulean blue ADCC, in which the affected daughter of a first cousin mating was presumed to be homozygous for the cataract gene. Recently, we mapped an ADCC gene in this family to a region of chromosome 22 containing three beta-crystallin genes. Here we report that a chain-termination mutation in CRYBB2 is associated with ADCC in this family.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Sequence
  • Base Sequence
  • Cataract / congenital
  • Cataract / genetics*
  • Crystallins / genetics*
  • Deoxyribonucleases, Type II Site-Specific / genetics
  • Deoxyribonucleases, Type II Site-Specific / metabolism
  • Exons
  • Female
  • Genes, Dominant*
  • Homozygote
  • Humans
  • Introns
  • Male
  • Molecular Sequence Data
  • Mutation*
  • Polymerase Chain Reaction


  • Crystallins
  • CTAG-specific type II deoxyribonucleases
  • Deoxyribonucleases, Type II Site-Specific

Associated data

  • GENBANK/U72400
  • GENBANK/U72401
  • GENBANK/U72402
  • GENBANK/U72403
  • GENBANK/U72404