rs181585555

Variant names:

• chr9-95447336-G-A
• rs181585555
• NM_000264.5:c.3920C>T

Your query was ambiguous. Multiple possible variants found:

• chr9-95447336-G-A
• chr9-95447336-G-C
• chr9-95447336-G-T

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP6

The NM_000264.5(PTCH1):​c.3920C>T​(p.Pro1307Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,062 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P1307H) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: PTCH1 NM_000264.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 1.15
• Publications: 3 publications found

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

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09874055).
• BP6: Variant 9-95447336-G-A is Benign according to our data. Variant chr9-95447336-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 524553.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000264.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PTCH1	NM_000264.5	MANE Select	c.3920C>T	p.Pro1307Leu	missense	Exon 23 of 24	NP_000255.2
	PTCH1	NM_001083603.3	MANE Plus Clinical	c.3917C>T	p.Pro1306Leu	missense	Exon 23 of 24	NP_001077072.1
	PTCH1	NM_001354918.2		c.3764C>T	p.Pro1255Leu	missense	Exon 22 of 23	NP_001341847.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PTCH1	ENST00000331920.11	TSL:5 MANE Select	c.3920C>T	p.Pro1307Leu	missense	Exon 23 of 24	ENSP00000332353.6
	PTCH1	ENST00000437951.6	TSL:5 MANE Plus Clinical	c.3917C>T	p.Pro1306Leu	missense	Exon 23 of 24	ENSP00000389744.2
	PTCH1	ENST00000429896.6	TSL:1	c.3467C>T	p.Pro1156Leu	missense	Exon 23 of 24	ENSP00000414823.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000811 AC: 2 AN: 246642 AF XY: 0.00000743

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000180

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461062 Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 2 AN XY: 726856

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52768

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1111856

Other (OTH) AF: 0.00 AC: 0 AN: 60380

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000312 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.0000165 AC: 2

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Apr 03, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.P1307L variant (also known as c.3920C>T), located in coding exon 23 of the PTCH1 gene, results from a C to T substitution at nucleotide position 3920. The proline at codon 1307 is replaced by leucine, an amino acid with similar properties. This amino acid position is not well conserved in available vertebrate species. 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.

Holoprosencephaly 7;C2751544:Basal cell carcinoma, susceptibility to, 1;CN376810:Basal cell nevus syndrome 1 Uncertain:1

May 15, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Gorlin syndrome Benign:1

Nov 26, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.072
BayesDel_addAF	Benign	-0.077	T
BayesDel_noAF	Benign	-0.33
CADD	Benign	17
DANN	Benign	0.94
DEOGEN2	Benign	0.26	T
Eigen	Benign	-0.59
Eigen_PC	Benign	-0.54
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.81	T
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.099	T
MetaSVM	Benign	-0.63	T
MutationAssessor	Benign	0.69	N
PhyloP100		1.1
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-1.0	N
REVEL	Benign	0.15
Sift	Benign	0.081	T
Sift4G	Benign	0.16	T
Polyphen		0.0	B
Vest4		0.14
MVP		0.40
MPC		0.078
ClinPred		0.019	T
GERP RS		1.8
Varity_R		0.046
gMVP		0.27
Mutation Taster		=78/22	polymorphism

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

Other links and lift over

dbSNP: rs181585555; hg19: chr9-98209618; COSMIC: COSV59478147;