9-95485818-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_000264.5(PTCH1):c.451G>A(p.Ala151Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000657 in 152,174 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. A151S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Consequence

PTCH1
NM_000264.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.85

Publications

5 publications found

Variant links:

COSMIC-nc: COSV59497012

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]

PTCH1 Gene-Disease associations (from GenCC):

basal cell nevus syndrome 1
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
holoprosencephaly 7
Inheritance: AD Classification: DEFINITIVE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
nevoid basal cell carcinoma syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, ClinGen, Labcorp Genetics (formerly Invitae), Orphanet
holoprosencephaly
Inheritance: AD Classification: LIMITED Submitted by: Illumina

PTCH1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PTCH1	NM_000264.5 link	c.451G>A	p.Ala151Thr	missense_variant	Exon 3 of 24	ENST00000331920.11	NP_000255.2	Q13635-1
PTCH1	NM_001083603.3 link	c.448G>A	p.Ala150Thr	missense_variant	Exon 3 of 24	ENST00000437951.6	NP_001077072.1	Q13635-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PTCH1	ENST00000331920.11 link	c.451G>A	p.Ala151Thr	missense_variant	Exon 3 of 24	5	NM_000264.5	ENSP00000332353.6		Q13635-1
PTCH1	ENST00000437951.6 link	c.448G>A	p.Ala150Thr	missense_variant	Exon 3 of 24	5	NM_001083603.3	ENSP00000389744.2		Q13635-2

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74340

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41440

American (AMR)

AF:

0.00

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68020

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Uncertain:1

May 02, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.A151T variant (also known as c.451G>A), located in coding exon 3 of the PTCH1 gene, results from a G to A substitution at nucleotide position 451. The alanine at codon 151 is replaced by threonine, an amino acid with similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Pathogenic

0.23

BayesDel_noAF

Uncertain

0.090

CADD

Uncertain

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.37

T;.;.;.;.

Eigen

Uncertain

0.50

Eigen_PC

Uncertain

0.53

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.94

D;D;.;D;D

M_CAP

Uncertain

0.086

MetaRNN

Uncertain

0.44

T;T;T;T;T

MetaSVM

Uncertain

0.45

MutationAssessor

Uncertain

2.1

M;.;.;.;.

PhyloP100

3.9

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-1.6

N;N;N;N;N

REVEL

Uncertain

0.54

Sift

Benign

0.10

T;T;T;T;T

Sift4G

Benign

0.089

T;T;T;D;D

Polyphen

0.89

P;D;D;D;.

Vest4

0.61

MutPred

0.29

Gain of methylation at K146 (P = 0.0735);.;.;.;.;

MVP

0.62

MPC

0.62

ClinPred

0.85

GERP RS

4.7

Varity_R

0.55

gMVP

0.66

Mutation Taster

=178/122

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over