rs774219740

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The ENST00000372192.4(PTCH2):ā€‹c.229A>Gā€‹(p.Ile77Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000233 in 1,461,888 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (ā˜…ā˜…). Synonymous variant affecting the same amino acid position (i.e. I77I) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)
Exomes š‘“: 0.000023 ( 0 hom. )

Consequence

PTCH2
ENST00000372192.4 missense

Scores

19

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: -0.754
Variant links:
Genes affected
PTCH2 (HGNC:9586): (patched 2) This gene encodes a transmembrane receptor of the patched gene family. The encoded protein may function as a tumor suppressor in the hedgehog signaling pathway. Alterations in this gene have been associated with nevoid basal cell carcinoma syndrome, basal cell carcinoma, medulloblastoma, and susceptibility to congenital macrostomia. Alternatively spliced transcript variants have been described.[provided by RefSeq, Oct 2009]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4
Computational evidence support a benign effect (MetaRNN=0.043468237).
BS2
High AC in GnomAdExome4 at 34 AD gene.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
PTCH2NM_003738.5 linkuse as main transcriptc.229A>G p.Ile77Val missense_variant 2/22 ENST00000372192.4 NP_003729.3
PTCH2NM_001166292.2 linkuse as main transcriptc.229A>G p.Ile77Val missense_variant 2/23 NP_001159764.1

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
PTCH2ENST00000372192.4 linkuse as main transcriptc.229A>G p.Ile77Val missense_variant 2/221 NM_003738.5 ENSP00000361266 P2Q9Y6C5-1
PTCH2ENST00000447098.6 linkuse as main transcriptc.229A>G p.Ile77Val missense_variant 2/231 ENSP00000389703 A2Q9Y6C5-2

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD3 exomes
AF:
0.00000795
AC:
2
AN:
251482
Hom.:
0
AF XY:
0.00000736
AC XY:
1
AN XY:
135920
show subpopulations
Gnomad AFR exome
AF:
0.00
Gnomad AMR exome
AF:
0.00
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.0000176
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.0000233
AC:
34
AN:
1461888
Hom.:
0
Cov.:
33
AF XY:
0.0000193
AC XY:
14
AN XY:
727244
show subpopulations
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:
0.0000187
Gnomad4 NFE exome
AF:
0.0000279
Gnomad4 OTH exome
AF:
0.0000331
GnomAD4 genome
Cov.:
32
Alfa
AF:
0.0000712
Hom.:
0
Bravo
AF:
0.00000378
ExAC
AF:
0.00000824
AC:
1

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not specified Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingAmbry GeneticsAug 16, 2022The c.229A>G (p.I77V) alteration is located in exon 2 (coding exon 2) of the PTCH2 gene. This alteration results from a A to G substitution at nucleotide position 229, causing the isoleucine (I) at amino acid position 77 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -
Gorlin syndrome Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpSep 10, 2022In 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. 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) performed at Invitae indicates that this missense variant is not expected to disrupt PTCH2 protein function. ClinVar contains an entry for this variant (Variation ID: 453932). This variant has not been reported in the literature in individuals affected with PTCH2-related conditions. This variant is present in population databases (rs774219740, gnomAD 0.002%). This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 77 of the PTCH2 protein (p.Ile77Val). -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.060
BayesDel_addAF
Benign
-0.19
T
BayesDel_noAF
Benign
-0.50
CADD
Benign
0.41
DANN
Benign
0.61
DEOGEN2
Benign
0.076
.;T
Eigen
Benign
-1.6
Eigen_PC
Benign
-1.6
FATHMM_MKL
Benign
0.028
N
LIST_S2
Benign
0.75
T;T
M_CAP
Benign
0.037
D
MetaRNN
Benign
0.043
T;T
MetaSVM
Benign
-0.58
T
MutationAssessor
Benign
-0.12
N;N
MutationTaster
Benign
1.0
N;N
PrimateAI
Benign
0.27
T
PROVEAN
Benign
0.52
N;N
REVEL
Benign
0.17
Sift
Benign
0.33
T;T
Sift4G
Benign
0.32
T;T
Polyphen
0.0
.;B
Vest4
0.079
MutPred
0.47
Loss of catalytic residue at L82 (P = 0.074);Loss of catalytic residue at L82 (P = 0.074);
MVP
0.79
MPC
0.14
ClinPred
0.083
T
GERP RS
-4.3
Varity_R
0.026
gMVP
0.25

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

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs774219740; hg19: chr1-45307555; API