NM_000264.5:c.884C>A

Variant names:

• chr9-95480451-G-T
• rs370755364
• NM_000264.5:c.884C>A
• PTCH1 p.Pro295His

GermlineCancer (beta)

Variant summary

Our verdict is Uncertain significance.

+3 Uncertain · Warm

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 3 classification points (ACGS-UK Somatic Oncogenicity v2025). O3_ModerateO6_Supporting

The NM_000264.5(PTCH1):c.884C>A (p.Pro295His) variant causes a missense change involving the alteration of a conserved nucleotide. The gene PTCH1 is a tumor suppressor gene (CancerMine: 35 TSG, 20 oncogene, 13 driver citations). The gene PTCH1 is a known oncogene (CancerMine: 35 TSG, 20 oncogene, 13 driver citations). The gene PTCH1 is a cancer driver gene (CancerMine: 35 TSG, 20 oncogene, 13 driver citations). The variant is absent from the gnomAD population database at sites with sufficient sequencing coverage. In-silico predictor (REVEL) classifies this variant as likely damaging/oncogenic. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. The affected nucleotide is highly conserved across species (PhyloP 100-way vertebrate score: 9.60). No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Other variants at the same amino acid position have been reported in ClinVar (not pathogenic): p.P295L: Conflicting_classifications_of_pathogenicity (ClinVar VariationId 135908); p.P295= (synonymous): Likely_benign (ClinVar VariationId 1764907, 1 star); p.P295= (synonymous): Likely_benign (ClinVar VariationId 2916215, 2 stars); p.P295S: Uncertain_significance (ClinVar VariationId 2633768, 2 stars); p.P295T: Uncertain_significance (ClinVar VariationId 4862716, 1 star) The variant has been observed in cBioPortal in 1 sample across 1 study and 1 cancer type; somatic enrichment level: NONE (Observed in at most one deduplicated cBioPortal case.).

• Frequency: Genomes: not found (cov: 31)
• Consequence: PTCH1 NM_000264.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.60
• Publications: 0 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, STRONG Submitted by: G2P, PanelApp Australia
• holoprosencephaly 7

  Inheritance: AD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, PanelApp Australia
• nevoid basal cell carcinoma syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Orphanet, ClinGen
• exstrophy-epispadias complex

  Inheritance: AD Classification: STRONG Submitted by: PanelApp Australia
• holoprosencephaly

  Inheritance: AD Classification: LIMITED Submitted by: Illumina, ClinGen

Classification according to ACGS-UK Somatic Oncogenicity v2025

Classification was made for transcript:

Our verdict: Uncertain_significance. The variant received 3 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	O3Absent or very rare in population		Absent or extremely rare in gnomAD (AC ≤ 2) — O3 moderate; GnomAD: AF = absent, AC = 0 — absent/extremely rare (O3 moderate [+2])
	O6Computational evidence supports deleterious effect		Computational evidence supports a deleterious/oncogenic effect; Missense variant — primary computational scorer supports an oncogenic/deleterious effect

Variant Effect in Transcripts

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

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PTCH1	NM_000264.5	MANE Select	c.884C>A	p.Pro295His	missense	Exon 6 of 24	NP_000255.2	Q13635-1
	PTCH1	NM_001083603.3	MANE Plus Clinical	c.881C>A	p.Pro294His	missense	Exon 6 of 24	NP_001077072.1	Q13635-2
	PTCH1	NM_001354918.2		c.884C>A	p.Pro295His	missense	Exon 6 of 23	NP_001341847.1	A0A1W5YLI7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PTCH1	ENST00000331920.11	TSL:5 MANE Select	c.884C>A	p.Pro295His	missense	Exon 6 of 24	ENSP00000332353.6	Q13635-1
	PTCH1	ENST00000437951.6	TSL:5 MANE Plus Clinical	c.881C>A	p.Pro294His	missense	Exon 6 of 24	ENSP00000389744.2	Q13635-2
	PTCH1	ENST00000429896.6	TSL:1	c.431C>A	p.Pro144His	missense	Exon 6 of 24	ENSP00000414823.2	Q13635-4

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 3 sources Large-scale international reference populations
GnomAD3 genomes	AF:	AC:	Hom:	AN:	Cov:31
GnomAD4 exome	AF:	AC:	Hom:	AN:	Cov:31
GnomAD4 genome	AF:	AC:	Hom:	AN:	Cov:31

Showing 3 sources

ClinVar

Not reported in ClinVar

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
AlphaGenome AVI	Pathogenic	25
AlphaMissense	Uncertain	0.48
BayesDel_addAF	Pathogenic	0.51	D
BayesDel_noAF	Pathogenic	0.49
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.86	D
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.98
FATHMM_MKL	Pathogenic	1.0	D
FuncVEP CTI	Pathogenic	0.77
GPN-Star LLR	N/A	-9.2
GPN-Star score	N/A	9.2
LIST_S2	Uncertain	0.95	D
M_CAP	Pathogenic	0.48	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Pathogenic	0.99	D
Mutation Taster	N/A	3/97	disease causing
MutationAssessor	Pathogenic	3.0	M
PhyloP100	Pathogenic	9.6
popEVE	Benign	-3.6
PrimateAI	Pathogenic	0.83	D
PromoterAI	N/A	-0.024	Neutral
PROVEAN	Pathogenic	-8.6	D
RBP_binding_hub_radar	N/A	0.0
RBP_regulation_power_radar	N/A	1.7
REVEL	Pathogenic	0.87
Sift	Uncertain	0.0010	D
Sift4G	Pathogenic	0.0	D
Varity_R	N/A	0.86
VESM-3B	Benign	-10

Showing 31 of 31 scores

Splicing Scores

Algorithm	Calibrated pred.	Score	Prediction
Pangolin (max)	Benign	0.0
SpliceAI score (max)	Benign	0.0	Details are displayed if max score is > 0.2

Showing 2 of 2 scores

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs370755364;

hg19: chr9-98242733;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar