Is PTEN p.Val255Ile (c.763G>A) pathogenic?

PTEN p.Val255Ile (c.763G>A) is classified Uncertain significance in PTEN (ClinVar, Single submitter, 1 submitter; last evaluated 2021-07-12). AlphaMissense: likely benign (0.212); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with PTEN p.Val255Ile (c.763G>A)?

PTEN p.Val255Ile (c.763G>A) is associated with hereditary neoplastic syndrome (ClinVar).

How common is PTEN p.Val255Ile (c.763G>A) in the general population?

PTEN p.Val255Ile (c.763G>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about PTEN p.Val255Ile (c.763G>A)?

AlphaMissense predicts likely benign (score 0.212) — an in-silico prediction, not a clinical call.

PTEN p.Val255Ile

c.763G>A · rs2132277538 · VCV1759934

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.212 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.212	likely benign
REVEL	0.297	indeterminate
SaProt	LLR -6.74	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 9.9	GERP 2.5, phastCons 1
Regional constraint	o/e 0.51	unconstrained · MANE · 32 kb · p 4.1e-17 · regional, not allelic
Overall
CADD	23.1	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: PTEN
Protein: p.Val255Ile
Coding: c.763G>A
MANE Select: NM_000314
dbSNP: rs2132277538
Type: single nucleotide variant
Location: chr10:87957981 (GRCh38)
Gene constraint: LOEUF 0.685 · pLI 0.05 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 83.76 · 12 PDB
Residue 255: a β-strand; the c2 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

Similar variants

PTEN p.Val255Glu Likely pathogenic ★★ same residue
PTEN p.Val255= Likely benign ★★ same residue
PTEN p.Val255_Glu256insTer Pathogenic ★ same residue
PTEN p.Val255Gly Likely pathogenic ★ same residue
PTEN c.1026+1G>A Pathogenic ★★★ same condition
PTEN c.1027-1852A>G Likely pathogenic ★★★ same condition
PTEN c.1027-1G>A Pathogenic ★★★ same condition
PTEN c.165-1G>A Likely pathogenic ★★★ 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/pten-p-val255ile (accessed [today's date]).

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