Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\27867342.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Mol+Syndromol 2016 ; 7 (5): 274-81 Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The Family of Crumbs Genes and Human Disease #MMPMID27867342
Slavotinek AM
Mol Syndromol 2016[Oct]; 7 (5): 274-81 PMID27867342show ga
The family of vertebrate Crumbs proteins, homologous to Drosophila Crumbs (Crb), share large extracellular domains with epidermal growth factor-like repeats and laminin-globular domains, a single transmembrane domain, and a short intracellular C-terminus containing a single membrane proximal 4.1/ezrin/radixin/moesin-binding domain and PSD-95/Discs large/ZO-1-binding motifs. There are 3 Crb genes in humans - Crumbs homolog-1 (CRB1), Crumbs homolog-2 (CRB2), and Crumbs homolog-3 (CRB3). Bilallelic loss-of-function mutations in CRB1 cause visual impairment, with Leber's congenital amaurosis and retinitis pigmentosa, whereas CRB2 mutations are associated with raised maternal serum and amniotic fluid alpha feto-protein levels, ventriculomegaly/hydrocephalus, and renal disease, ranging from focal segmental glomerulosclerosis to congenital Finnish nephrosis. CRB3 has not yet been associated with human disease. In this review, we summarize the phenotypic findings associated with deleterious sequence variants in CRB1 and CRB2. We discuss the mutational spectrum, animal models of loss of function for both genes and speculate on the likely mechanisms of disease.