Is PTEN p.Tyr178= (c.534T>C) pathogenic?

PTEN p.Tyr178= (c.534T>C) is classified Benign/Likely benign in PTEN (ClinVar, Multiple submitters, 8 submitters; last evaluated 2025-09-03). Very rare (popmax 0.00167%, amr); Associated with hereditary neoplastic syndrome.

What condition is associated with PTEN p.Tyr178= (c.534T>C)?

PTEN p.Tyr178= (c.534T>C) is associated with hereditary neoplastic syndrome, Cowden syndrome 1, PTEN hamartoma tumor syndrome (ClinVar).

How common is PTEN p.Tyr178= (c.534T>C) in the general population?

PTEN p.Tyr178= (c.534T>C) is very rare (popmax 0.00167%, amr) (gnomAD).

PTEN p.Tyr178=

c.534T>C · rs104894184 · VCV231805

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 8 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Conditions

hereditary neoplastic 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 2.4	GERP 0.28, phastCons 1
Overall
CADD	10.48	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00167% Admixed American · 1/60,030 alleles

Overall 0.000205% 3/1,460,958 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	60,030
Remaining individualsnot grpmax-eligible	0.0016%	62,480
European (non-Finnish)	8.48e-05%	1,179,372

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: PTEN
Protein: p.Tyr178=
Coding: c.534T>C
MANE Select: NM_000314
dbSNP: rs104894184
Type: single nucleotide variant
Location: chr10:87952159 (GRCh38)
Gene constraint: LOEUF 0.685 · pLI 0.05 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 83.76 · 12 PDB
Residue 178: an α-helix; the phosphatase tensin-type domain; a UniProt-annotated variant site (in mcephas)

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

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Cowden syndrome 1 PTEN hamartoma tumor syndrome

Similar variants

PTEN p.Tyr178Asn Likely pathogenic ★ same residue
PTEN p.Tyr178Ter Pathogenic ★ same residue
PTEN p.Tyr178Asp Uncertain significance ★ ⚠ same residue
PTEN p.Tyr178Cys Conflicting classifications of pathogenicity ★ ⚠ same residue
PTEN p.Tyr178His Uncertain significance ★ ⚠ same residue
PTEN p.Tyr178Phe Uncertain significance ★ ⚠ same residue
PTEN p.Tyr178_Ser179delinsTer Pathogenic ★★★ same residue
PTEN p.Tyr178del Likely pathogenic ★★★ same residue

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/pten-p-tyr178 (accessed [today's date]).

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