A novel homozygous missense variant in TBC1D31 in a consanguineous family with congenital anomalies of the kidney and urinary tract (CAKUT)

Congenital anomalies of the kidney and urinary tract (CAKUT) is the leading cause of chronic kidney disease in the first three decades of life. Until now, more than 180 monogenic causes of isolated or syndromic CAKUT have been described. In addition, copy number variants (CNV) have also been implica...

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Bibliographic Details
Published in:Clinical genetics 2023-12, Vol.104 (6), p.679-685
Main Authors: Saygılı, Seha, Koşukcu, Can, Baştuğ, Turgut, Doğan, Özlem Akgün, Yılmaz, Esra Karabağ, Kalyoncu, Ayşe Uçar, Ağbaş, Ayşe, Canpolat, Nur, Çalışkan, Salim, Ozaltin, Fatih
Format: Article
Language:English
Subjects:
Congenital defects
Copy number
Kidney diseases
Urinary tract
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Summary:Congenital anomalies of the kidney and urinary tract (CAKUT) is the leading cause of chronic kidney disease in the first three decades of life. Until now, more than 180 monogenic causes of isolated or syndromic CAKUT have been described. In addition, copy number variants (CNV) have also been implicated, however, all of these causative factors only explain a small fraction of patients with CAKUT, suggesting that additional yet-to-be-discovered novel genes are present. Herein, we report three siblings (two of them are monozygotic twin) of a consanguineous family with CAKUT. Whole-exome sequencing identified a homozygous variant in TBC1D31. Three dimensional protein modeling as well as molecular dynamics simulations predicted it as pathogenic. We therefore showed for the first time an association between a homozygous TBC1D31 variant with CAKUT in humans, expanding its genetic spectrum.
ISSN:0009-9163
1399-0004
DOI:10.1111/cge.14406