Our verdict is Uncertain significance. Variant got 4 ACMG points: 8P and 4B. PVS1BS2
The NM_001077415.3(CRELD1):c.523C>T(p.Arg175*) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000558 in 1,613,730 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Variant results in nonsense mediated mRNA decay.
CRELD1 (HGNC:14630): (cysteine rich with EGF like domains 1) This gene encodes a member of a subfamily of epidermal growth factor-related proteins. The encoded protein is characterized by a cysteine-rich with epidermal growth factor-like domain. This protein may function as a cell adhesion molecule. Mutations in this gene are the cause of atrioventricular septal defect. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Apr 2010]
Atrioventricular septal defect, susceptibility to, 2 Uncertain:1
Uncertain significance, criteria provided, single submitter
clinical testing
Labcorp Genetics (formerly Invitae), Labcorp
Jul 22, 2017
This sequence change creates a premature translational stop signal (p.Arg175*) in the CRELD1 gene. It is expected to result in an absent or disrupted protein product. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. The current clinical and genetic evidence is not sufficient to establish whether loss-of-function variants in CRELD1 cause disease. This variant has not been reported in the literature in individuals with CRELD1-related disease. This variant is present in population databases (rs774018674, ExAC 0.01%). -