Renal Tubulopathies and related disorders

Gene: RRAGD

Green List (high evidence)

PMID: 34607910; Schlingmann, KP. et al. (2021) J Am Soc Nephrol. 32(11):2885-2899.
Six missense variants in RRAGD identified in eight children (some early infant onset) from unrelated families. The variants were recurrent or affecting the same amino acid, i.e., p.S76L, S76W, p.T97P, p.P119L, p.P119R and p.I221K note: these are absent in gnomAD v2.1.1, and are very highly conserved residues. All variants are located in the N-terminal G-domain and affect sequence motifs involved in nucleotide binding
The children had a tubulopathy characterised by hypomagnesemia, hypokalaemia, salt wasting, and nephrocalcinosis, and six had dilated cardiomyopathy.
Most occurred de novo. Two were familial. One family with two affected siblings showed low level mosaicism in the mother.
In vitro studies using transfected HEK293 cells showed increased binding to RPTOR and MTOR.
Sources: Literature

Created: 2 Feb 2023, 6:02 a.m.

Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted

Phenotypes
Inherited renal tubular disease, MONDO:0015962, RRAGD-related; dilated cardiomyopathy; hypomagnesaemia; renal salt-wasting; nephrocalcinosis

Publications

• 34607910