X-Linked juvenile retinoschisis: Localization between (DXS1195, DXS418) and AFM291WF5 on a single YAC

Hemant Pawar, Eve L. Bingham, Kelaginamane Hiriyanna, Meridee Segal, Julia E. Richards, Paul A. Sieving

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We studied 17 pedigrees with 108 affected males with X-linked juvenile retinoschisis (RS; McKusick No. 31270) and have analyzed all of the known polymorphic markers in the RS region of Xp22.1-p22.2 between DXS987 and DXS41. By haplotype analyses we found 7 individuals who showed crossovers in this interval surrounding RS. We previously reported AFM291wf5 as the centromeric boundary, and this remains unchanged in the present study. A new recombination was identified on the telomeric side at (DXS1195, DXS418). Our data support the locus order Xpter - (DXS987, DXS207, DXS1053, DXS43) - (DXS1195, DXS418) - (RS, DXS257, DXS999) - (AFM291wf5, DXS443) - DXS 1052 - (DXS 1226, DXS274, DXS41) - Xcen; loci grouped in parentheses could not be mutually ordered by our genetic data. Physical mapping has indicated a distance of at most 900-1,000 kb between (DXS 1195, DXS418) and AFM291wf5. No recombination was observed between RS and DXS257 which lies in our new interval of interest, but one critical individual was not informative with this marker. Our data now define the smallest RS inclusion interval. This interval is contained on a single YAC from which we have identified expressed sequences as candidate genes for RS.

Original languageEnglish (US)
Pages (from-to)329-335
Number of pages7
JournalHuman Heredity
Volume46
Issue number6
DOIs
StatePublished - Jan 1996
Externally publishedYes

Keywords

  • Eye disease
  • Genetic markers
  • Juvenile retinoschisis
  • X-chromosome

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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