Bardet-Biedl Syndrome 11
A number sign (#) is used with this entry because of evidence that Bardet-Biedl syndrome-11 (BBS11) is caused by mutation in the TRIM32 gene (602290) on chromosome 9q33. One such family has been reported.
DescriptionBBS11 was diagnosed in members of a single Israeli Bedouin family based on the presence of at least 3 of the following features: obesity, polydactyly, renal anomalies, retinopathy, hypogonadism, and learning disabilities (Chiang et al., 2006).
For a general phenotypic description and a discussion of genetic heterogeneity of Bardet-Biedl syndrome, see BBS1 (209900).
Molecular GeneticsChiang et al. (2006) studied a consanguineous Bedouin family with 4 sibs with BBS in which linkage studies had failed to identify a disease locus. High-density SNP genotyping identified a 2.4-Mb region of homozygosity linked to the phenotype. DNA sequencing of the entire coding sequence and consensus splice sites of the 6 genes within the 2.4-Mb interval revealed a single potential disease-causing variant in the 4 affected sibs, a homozygous transition resulting in a proline-to-serine substitution at codon 130 (P130S; 602290.0002) in TRIM32.