Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM2PP3_StrongPP5_Moderate
The NM_153704.6(TMEM67):c.2461G>A(p.Gly821Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,458,796 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 Pathogenic (★).
TMEM67 (HGNC:28396): (transmembrane protein 67) The protein encoded by this gene localizes to the primary cilium and to the plasma membrane. The gene functions in centriole migration to the apical membrane and formation of the primary cilium. Multiple transcript variants encoding different isoforms have been found for this gene. Defects in this gene are a cause of Meckel syndrome type 3 (MKS3) and Joubert syndrome type 6 (JBTS6). [provided by RefSeq, Nov 2008]
Verdict is Likely_pathogenic. Variant got 8 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PP3
MetaRNN computational evidence supports a deleterious effect, 0.972
PP5
Variant 8-93808861-G-A is Pathogenic according to our data. Variant chr8-93808861-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 1382.Status of the report is criteria_provided_single_submitter, 1 stars.
Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: research
PS1: 1 Turkish consanguineous family with 3 affected sibs homozygous for this missense variant. See OMIM entry for details. PM2: Not present in gnomAD - good coverage (60X coverage in exomes and 30X in genomes). PM5: 2 patients reported in 1 article (PMID: 19508969) with different missense variant at this position. PP1_supporting: 1 family, segregation in 3 affected for AR condition. -