chr9-95461940-G-C

Position:

• chr9-95461940-G-C

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000264.5(PTCH1):​c.2619C>G​(p.Tyr873Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PTCH1 NM_000264.5 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 0.0300

Genes affected

PTCH1 (HGNC:9585): (patched 1) This gene encodes a member of the patched family of proteins and a component of the hedgehog signaling pathway. Hedgehog signaling is important in embryonic development and tumorigenesis. The encoded protein is the receptor for the secreted hedgehog ligands, which include sonic hedgehog, indian hedgehog and desert hedgehog. Following binding by one of the hedgehog ligands, the encoded protein is trafficked away from the primary cilium, relieving inhibition of the G-protein-coupled receptor smoothened, which results in activation of downstream signaling. Mutations of this gene have been associated with basal cell nevus syndrome and holoprosencephaly. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 9-95461940-G-C is Pathogenic according to our data. Variant chr9-95461940-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 453824.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr9-95461940-G-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PTCH1	NM_000264.5	c.2619C>G	p.Tyr873Ter	stop_gained	16/24	ENST00000331920.11
PTCH1	NM_001083603.3	c.2616C>G	p.Tyr872Ter	stop_gained	16/24	ENST00000437951.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PTCH1	ENST00000331920.11	c.2619C>G	p.Tyr873Ter	stop_gained	16/24	5	NM_000264.5	A2
PTCH1	ENST00000437951.6	c.2616C>G	p.Tyr872Ter	stop_gained	16/24	5	NM_001083603.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Gorlin syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 11, 2022

This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Tyr873*) in the PTCH1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in PTCH1 are known to be pathogenic (PMID: 16301862, 16419085). This premature translational stop signal has been observed in individual(s) with clinical features of PTCH1 related conditions (PMID: 12925203, 26544948, 29575684). For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 453824). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.51	D
BayesDel_noAF	Pathogenic	0.50
CADD	Pathogenic	36
DANN	Uncertain	1.0
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Uncertain	0.86	D
MutationTaster	Benign	1.0	A;A;A;A;A;A;A
Vest4		0.98
GERP RS		3.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1554692291; hg19: chr9-98224222;