rs1354741081

chr9-95508335-C-Achr9-95508335-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_000264.5(PTCH1):c.27G>T(p.Glu9Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000067 in 149,310 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E9K) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000067 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PTCH1 NM_000264.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.90

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 Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, PTCH1
• BP4: Computational evidence support a benign effect (MetaRNN=0.20201996).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PTCH1	NM_000264.5	c.27G>T	p.Glu9Asp	missense_variant	1/24	ENST00000331920.11
PTCH1	NM_001083603.3	c.199-1736G>T		intron_variant		ENST00000437951.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PTCH1	ENST00000331920.11	c.27G>T	p.Glu9Asp	missense_variant	1/24	5	NM_000264.5	A2
PTCH1	ENST00000437951.6	c.199-1736G>T		intron_variant		5	NM_001083603.3

Frequencies

GnomAD3 genomes AF: 0.00000670 AC: 1 AN: 149310 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000149

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1123250 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 539720

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00000670 AC: 1 AN: 149310 Hom.: 0 Cov.: 32 AF XY: 0.0000137 AC XY: 1 AN XY: 72856

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000149

Gnomad4 OTH AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 27, 2022

The p.E9D variant (also known as c.27G>T), located in coding exon 1 of the PTCH1 gene, results from a G to T substitution at nucleotide position 27. The glutamic acid at codon 9 is replaced by aspartic acid, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.093
BayesDel_addAF	Benign	-0.085	T
BayesDel_noAF	Benign	-0.36
Cadd	Benign	21
Dann	Benign	0.96
DEOGEN2	Benign	0.20	T
Eigen	Benign	-0.22
Eigen_PC	Benign	-0.14
FATHMM_MKL	Benign	0.75	D
LIST_S2	Benign	0.47	T
M_CAP	Pathogenic	0.78	D
MetaRNN	Benign	0.20	T
MetaSVM	Uncertain	-0.18	T
MutationAssessor	Benign	0.69	N
MutationTaster	Benign	1.0	D;D;D;D;N
PrimateAI	Pathogenic	0.90	D
PROVEAN	Benign	-0.14	N
REVEL	Benign	0.23
Sift	Benign	0.26	T
Sift4G	Benign	0.46	T
Polyphen		0.32	B
Vest4		0.072
MutPred		0.078		Gain of helix (P = 0.2059);
MVP		0.73
MPC		0.66
ClinPred		0.50	D
GERP RS		3.0
Varity_R		0.086
gMVP		0.36

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: rs1354741081; hg19: chr9-98270617;