title: Novel homozygous mutations in the genes ARL6 and BBS10 underlying Bardet-Biedl syndrome.
abstract: Bardet-Biedl syndrome (BBS) is an autosomal recessive disorder resulting from structural and functional defects in numerous organs. Frequent manifestations reported in the syndrome include obesity, renal dysplasia, cognitive impairment, postaxial polydactyly, pigmentary retinal degeneration and hypogonadism. To date, 17 genes causing BBS have been identified. Two of these BBS1 and BBS10 are the most frequently mutated genes. The present report describes two consanguineous families (A, B) with clinical manifestations of BBS. Linkage in the family A was established to ARL6 on chromosome 3q11.2, while family B showed linkage to BBS10 on chromosome 12q21.2. Sequence analysis revealed a novel homozygous missense mutation (c.281T>C, p.Ile94Thr) in the gene ARL6 in family A and a nonsense mutation (c.1075C>T, p.Gln359*) in the gene BBS10 in family B. Mutations identified in the present study extend the body of evidence implicating the genes ARL6 and BBS10 in causing Bardet-Biedl syndrome.
authors.affiliation: Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University Islamabad, Pakistan.
authors.forename: Saadullah
authors.initials: S
authors.lastname: Khan
authors.forename: Imran
authors.initials: I
authors.lastname: Ullah
authors.lastname: Irfanullah
authors.forename: Muhammad
authors.initials: M
authors.lastname: Touseef
authors.forename: Sulman
authors.initials: S
authors.lastname: Basit
authors.forename: Muhammad Nasim
authors.initials: MN
authors.lastname: Khan
authors.forename: Wasim
authors.initials: W
authors.lastname: Ahmad
mesh_terms: D020727:ADP-Ribosylation Factors / Q000235:genetics*; D000293:Adolescent; D000328:Adult; D020788:Bardet-Biedl Syndrome / Q000235:genetics*; D018833:Chaperonins; D002648:Child; D003241:Consanguinity; D005091:Exons; D005260:Female; D008040:Genetic Linkage; D056385:Group II Chaperonins / Q000235:genetics*; D006239:Haplotypes; D006720:Homozygote; D006801:Humans; D008297:Male; D009154:Mutation; D010375:Pedigree; D010641:Phenotype; D055815:Young Adult
chemical_list: C512111:BBS10 protein, human; D018833:Chaperonins; D056385:Group II Chaperonins; C491435:ARL6 protein, human; D020727:ADP-Ribosylation Factors