Is PTCH2 p.Cys537= (c.1611C>T) pathogenic?

PTCH2 p.Cys537= (c.1611C>T) is classified Benign in PTCH2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-17). Low-frequency (popmax 1.43%, sas); Associated with nevoid basal cell carcinoma syndrome.

What condition is associated with PTCH2 p.Cys537= (c.1611C>T)?

PTCH2 p.Cys537= (c.1611C>T) is associated with nevoid basal cell carcinoma syndrome (ClinVar).

How common is PTCH2 p.Cys537= (c.1611C>T) in the general population?

PTCH2 p.Cys537= (c.1611C>T) is low-frequency (popmax 1.43%, sas) (gnomAD).

PTCH2 p.Cys537=

c.1611C>T · rs372959991 · VCV696331

Benign Single submitter

Classification

Benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

low-frequency (popmax 1.43%, sas)

Conditions

nevoid basal cell carcinoma syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.3	GERP -0.94, phastCons 1
Overall
CADD	11.38	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 1.43% South Asian · 1,306/91,088 alleles

Filtering AF 1.37% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.34%

Overall 0.0851% 1,373/1,614,170 alleles · low-frequency exomes 1,309/1,461,808 · genomes 64/152,362 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	1.43%	70
Remaining individualsnot grpmax-eligible	0.0928%	1,078
Middle Eastern	0.033%	3,031
Admixed American	0.00167%	60,022
African / African-American	0.00133%	75,062
European (non-Finnish)	0.000424%	236,008

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: PTCH2
Protein: p.Cys537=
Coding: c.1611C>T
MANE Select: NM_003738
dbSNP: rs372959991
Type: single nucleotide variant
Location: chr1:44828394 (GRCh38)
Gene constraint: LOEUF 0.895 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 79.25
Residue 537: the ssd domain

Full PTCH2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

nevoid basal cell carcinoma syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

PTCH2 c.2976+2T>C Uncertain significance ★★ same condition
PTCH2 c.526-2A>G Uncertain significance ★★ same condition
PTCH2 c.618-6C>A Uncertain significance ★★ same condition
PTCH2 p.Ala1052Thr Uncertain significance ★★ ⚠ same condition
PTCH2 p.Ala1090Val Uncertain significance ★★ ⚠ same condition
PTCH2 p.Ala203Val Uncertain significance ★★ same condition
PTCH2 p.Ala21Thr Uncertain significance ★★ ⚠ same condition
PTCH2 p.Ala371Gly Uncertain significance ★★ ⚠ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/ptch2-p-cys537 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown