Human Molecular Genetics, Vol 5, 1043-1046, Copyright © 1996 by Oxford University Press
MC Speer, R Tandan, PN Rao, T Fries, JM Stajich, PA Bolhuis, GJ Jobsis, JM Vance, KD Viles, K Sheffield, C James, SG Kahler, M Pettenati, JR Gilbert, PH Denton, LH Yamaoka and MA Pericak-Vance
The Bethlem myopathy, a childhood onset autosomal dominant myopathy with
joint contractures, has recently been localized to 21q in a series of Dutch
families and the alpha 1 and alpha 2 subunits of type VI collagen (COL6A1
and COL6A2) have been postulated as candidate genes. We investigate a large
family of French Canadian descent (family 1489) in which the Bethlem
myopathy is segregating. Family 1489 is unlinked to the region of interest
on 21q, thus demonstrating locus heterogeneity within the Bethlem myopathy
classification. In view of the localization of the genes coding the alpha 1
and alpha 2 subunits of type VI collagen on chromosome 21q, we carried out
linkage analysis on chromosome 2q where the alpha 3 subunit of type VI
collagen has been localized. We demonstrate linkage to markers in this
region, define the region of disease gene localization, and confirm by FISH
analysis that COL6A3 is located within the interval of interest making
COL6A3 a feasible candidate gene for the Bethlem myopathy.
ARTICLES
Evidence for locus heterogeneity in the Bethlem myopathy and linkage to 2q37
Division of Neurology, Duke University Medical Center, Durham, NC 27710, USA.
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