Abstract:
BACKGROUND:Bardet-Biedl syndrome (BBS) is characterized by a heterogeneous phenotypic spectrum of retinopathy, intellectual disability (ID), obesity, polydactyly, and kidney dysfunctions as the major clinical features. Genetic investigations have reported 21 BBS genes, the products of which are mostly located at the centrosome, basal body or the ciliary transition zone. METHODS:In the present genetic report, we analyzed two apparently unrelated consanguineous BBS families from Dera Ismail Khan (D.I.Khan) district, Pakistan. Genetic mapping was performed using Whole exome sequencing and Sanger sequencing. RESULTS:Whole exome sequencing identified a recently reported single base deletion NM_001033604.1:c.299delC in the fourth exon of BBS9 in both families. The identified frameshift mutation is predicted to cause premature truncation of the expressed protein (p.Ser100Leufs*24). This mutation has previously been mapped in a consanguineous Pakistani family; therefore this is the second report of this particular mutation in two additional BBS families originating from different locations. CONCLUSION:We speculate the evolutionary significance of this mutation and assume its strong founder effect in the Khaisoori tribe of D.I.Khan. Based on these findings, we suggest developing a molecular diagnostic test that may be used for premarital and prenatal screening of families at risk of BBS.
journal_name
Mol Genet Genomic Medjournal_title
Molecular genetics & genomic medicineauthors
Muzammal M,Zubair M,Bierbaumer S,Blatterer J,Graf R,Gul A,Abbas S,Badar M,Abbasi AA,Khan MA,Windpassinger Cdoi
10.1002/mgg3.834subject
Has Abstractpub_date
2019-08-01 00:00:00pages
e834issue
8issn
2324-9269journal_volume
7pub_type
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