Localization of the syndactyly type II (synpolydactyly) locus to 2q31 region and identification of tight linkage to HOXD8 intragenic marker.
Syndactyly type II (SynPolyDactyly; SPD) is an autosomal dominant condition with incomplete penetrance and variable expressivity. Sixty-two meioses from a kindred with 425 individuals were used to map the SPD locus to 2q31 region, approximately 1.7 cM (Lod score = 12.96) centromeric to HOXD8 intragenic marker. Other homeobox-containing genes in this region have previously been ordered as cen-DLX1/DLX2-EVX2-(5' --> HOXD13..HOXD8.HOXD1 --> 3')-tel')-tel. A single recombinant with HOXD8 excluded the most 3' end of HOXD cluster as a candidate site for SPD, but a mutation in the 5' end of HOXD cluster, especially in HOXD13, EVX2 or DLX2/DLX1, may still be responsible for this phenotype. An updated order of D2S142-D2S111-(D2S335/D2S333)-D2S326-D2 S1238-SPD- (HOXD8/D2S1244)-(D2S300/D2S138)-D2S148- D2S324- D2S1384-D2S434 [sequence:see text] was deduced from meiotic recombination events.
Sarfarazi
M
M
Department of Surgery, University of Connecticut Health Center, Farmington, USA.
Akarsu
A N
AN
Sayli
B S
BS
D001483:Base Sequence; D002874:Chromosome Mapping; D002889:Chromosomes, Human, Pair 2 / Q000235:genetics*; D017931:DNA Primers / Q000235:genetics; D005260:Female; D008040:Genetic Linkage; D005819:Genetic Markers; D006239:Haplotypes; D006801:Humans; D008297:Male; D008969:Molecular Sequence Data; D010375:Pedigree; D013576:Syndactyly / Q000145:classification / Q000235:genetics*
D017931:DNA Primers; D005819:Genetic Markers