chr9-95461962-C-T
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate
The NM_000264.5(PTCH1):c.2597G>A(p.Gly866Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,890 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G866R) has been classified as Likely benign.
Frequency
Consequence
NM_000264.5 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 4 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
PTCH1 | ENST00000331920.11 | c.2597G>A | p.Gly866Glu | missense_variant | Exon 16 of 24 | 5 | NM_000264.5 | ENSP00000332353.6 | ||
PTCH1 | ENST00000437951.6 | c.2594G>A | p.Gly865Glu | missense_variant | Exon 16 of 24 | 5 | NM_001083603.3 | ENSP00000389744.2 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251494Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135922
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461890Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1AN XY: 727246
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
not provided Uncertain:2
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Gorlin syndrome Uncertain:1
This sequence change replaces glycine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 866 of the PTCH1 protein (p.Gly866Glu). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with PTCH1-related conditions. ClinVar contains an entry for this variant (Variation ID: 216377). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on PTCH1 protein function. 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. -
Hereditary cancer-predisposing syndrome Uncertain:1
The p.G866E variant (also known as c.2597G>A), located in coding exon 16 of the PTCH1 gene, results from a G to A substitution at nucleotide position 2597. The glycine at codon 866 is replaced by glutamic acid, an amino acid with similar properties. This alteration was identified in a cohort of long-term pancreatic cancer survivors from the Czech Republic (Lovecek M et al. Cancer Manag Res, 2019 Jan;11:599-609). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at