Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM2PM5PP2PP3_StrongPP5
The ENST00000378473.9(PLCB4):c.1898G>T(p.Arg633Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,456,824 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R633H) has been classified as Pathogenic.
PLCB4 (HGNC:9059): (phospholipase C beta 4) The protein encoded by this gene catalyzes the formation of inositol 1,4,5-trisphosphate and diacylglycerol from phosphatidylinositol 4,5-bisphosphate. This reaction uses calcium as a cofactor and plays an important role in the intracellular transduction of many extracellular signals in the retina. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2010]
Verdict is Pathogenic. Variant got 10 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PM5
Other missense variant is known to change same aminoacid residue: Variant chr20-9409080-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 31639.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PLCB4. . Gene score misZ 3.5718 (greater than the threshold 3.09). Trascript score misZ 3.2758 (greater than threshold 3.09). GenCC has associacion of gene with auriculocondylar syndrome 1, auriculocondylar syndrome, auriculocondylar syndrome 2.
PP3
MetaRNN computational evidence supports a deleterious effect, 0.981
PP5
Variant 20-9409080-G-T is Pathogenic according to our data. Variant chr20-9409080-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 64692.Status of the report is no_assertion_criteria_provided, 0 stars.