Remapping of the RP15 locus for X-linked cone-rod degeneration to Xp11.4-p21.1, and identification of a de novo insertion in the RPGR exon ORF15

Alan J. Mears, Suja Hiriyanna, Raf Vervoort, Beverly Yashar, Linn Gieser, Stacey Fahrner, Stephen P. Daiger, John R. Heckenlively, Paul A. Sieving, Alan F. Wright, Anand Swaroop

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

X-linked forms of retinitis pigmentosa (XLRP) are among the most severe, because of their early onset, often leading to significant vision loss before the 4th decade. Previously, the RP15 locus was assigned to Xp22, by linkage analysis of a single pedigree with 'X-linked dominant cone-rod degeneration.' After clinical reevaluation of a female in this pedigree identified her as affected, we remapped the disease to a 19.5-cM interval (DXS1219-DXS993) at Xp11.4-p21.1. This new interval overlapped both RP3 (RPGR) and COD1. Sequencing of the previously published exons of RPGR revealed no mutations, but a de novo insertion was detected in the new RPGR exon, ORF15. The identification of an RPGR mutation in a family with a severe form of cone and rod degeneration suggests that RPGR mutations may encompass a broader phenotypic spectrum than has previously been recognized in 'typical' retinitis pigmentosa.

Original languageEnglish (US)
Pages (from-to)1000-1003
Number of pages4
JournalAmerican Journal of Human Genetics
Volume67
Issue number4
DOIs
StatePublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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