Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2PP3_ModeratePP5
The NM_001353125.2(CEP63):c.-50C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000186 in 1,612,752 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 Conflicting classifications of pathogenicity (no stars).
CEP63 (HGNC:25815): (centrosomal protein 63) This gene encodes a protein with six coiled-coil domains. The protein is localized to the centrosome, a non-membraneous organelle that functions as the major microtubule-organizing center in animal cells. Several alternatively spliced transcript variants have been found, but their biological validity has not been determined. [provided by RefSeq, Jul 2008]
Verdict is Uncertain_significance. Variant got 5 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PP3
BayesDel_addAF computational evidence supports a deleterious effect, 0.385
PP5
Variant 3-134495351-C-T is Pathogenic according to our data. Variant chr3-134495351-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 501990.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=1, Pathogenic=2}.
For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 501990). This variant has not been reported in the literature in individuals affected with CEP63-related conditions. This variant is present in population databases (rs763001827, gnomAD 0.01%). This sequence change creates a premature translational stop signal (p.Arg11*) in the CEP63 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in CEP63 are known to be pathogenic (PMID: 21983783, 23936128, 26158450). -
Uncertain significance, criteria provided, single submitter