Mutations of the forkhead/winged-helix gene, FKHL7, in patients with Axenfeld-Rieger anomaly

Alan J. Mears, Tim Jordan, Farideh Mirzayans, Stéphane Dubois, Tsutomu Kume, Michael Parlee, Robert Ritch, Benjamin Koop, Wen Lin Kuo, Colin Collins, Jody Marshall, Douglas B. Gould, William Pearce, Peter Carlsson, Sven Enerbäck, Jean Morissette, Shomi Bhattacharya, Brigid Hogan, Vincent Raymond, Michael A. Walter*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

280 Scopus citations


Genetic linkage, genome mismatch scanning, and analysis of patients with alterations of chromosome 6 have indicated that a major locus for development of the anterior segment of the eye, IRID1, is located at 6p25. Abnormalities of this locus lead to glaucoma. FKHL7 (also called 'FREAC3'), a member of the forkhead/winged-helix transcription-factor family, has also been mapped to 6p25. DNA sequencing of FKHL7 in five IRID1 families and 16 sporadic patients with anterior-segment defects revealed three mutations: a 10-bp deletion predicted to cause a frameshift and premature protein truncation prior to the FKHL7 forkhead DNA-binding domain, as well as two missense mutations of conserved amino acids within the FKHL7 forkhead domain. Mf1, the murine homologue of FKHL7, is expressed in the developing brain, skeletal system, and eye, consistent with FKHL7 having a role in ocular development. However, mutational screening and genetic-linkage analyses excluded FKHL7 from underlying the anterior-segment disorders in two IRID1 families with linkage to 6p25. Our findings demonstrate that, although mutations of FKHL7 result in anterior-segment defects and glaucoma in some patients, it is probable that at least one more locus involved in the regulation of eye development is also located at 6p25.

Original languageEnglish (US)
Pages (from-to)1316-1328
Number of pages13
JournalAmerican journal of human genetics
Issue number5
StatePublished - 1998

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)


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