Is TGFB2 p.Ala88Pro (c.262G>C) pathogenic?

TGFB2 p.Ala88Pro (c.262G>C) is classified Uncertain significance in TGFB2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-04-24). AlphaMissense: likely benign (0.2314); Absent from gnomAD v4.1; Associated with familial thoracic aortic aneurysm and aortic dissection.

What condition is associated with TGFB2 p.Ala88Pro (c.262G>C)?

TGFB2 p.Ala88Pro (c.262G>C) is associated with familial thoracic aortic aneurysm and aortic dissection (ClinVar).

How common is TGFB2 p.Ala88Pro (c.262G>C) in the general population?

TGFB2 p.Ala88Pro (c.262G>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about TGFB2 p.Ala88Pro (c.262G>C)?

AlphaMissense predicts likely benign (score 0.2314) — an in-silico prediction, not a clinical call.

TGFB2 p.Ala88Pro

Q: How is Familial thoracic aortic aneurysm and aortic dissection inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

c.262G>C · rs2464550448 · VCV2539844

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2314 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

familial thoracic aortic aneurysm and aortic dissection

Computational evidence

Protein change
AlphaMissense	0.2314	likely benign
REVEL	0.189	benign-leaning
SaProt	LLR -10.86	damaging
⇒ SaProt calls this damaging; AlphaMissense and REVEL do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 2, phastCons 1
Regional constraint	o/e 0.75	unconstrained · MANE · 95 kb · p 2.1e-08 · regional, not allelic
Overall
CADD	25.9	PHRED · no single calibrated threshold — expert panels disagree

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: TGFB2
Protein: p.Ala88Pro
Coding: c.262G>C
MANE Select: NM_003238
dbSNP: rs2464550448
Type: single nucleotide variant
Location: chr1:218346963 (GRCh38)
Gene constraint: LOEUF 0.463 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 80.41 · 11 PDB

Full TGFB2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

familial thoracic aortic aneurysm and aortic dissection — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Familial thoracic aortic aneurysm and aortic dissection (Orphanet):

Inheritance: Autosomal dominant
Onset: Adolescent, Adult, Childhood

Similar variants

TGFB2 c.346+1G>T Likely pathogenic ★★ same condition
TGFB2 p.Arg131Ter Pathogenic/Likely pathogenic ★★ same condition
TGFB2 p.Arg299Gln Pathogenic/Likely pathogenic ★★ same condition
TGFB2 p.Arg299Trp Pathogenic/Likely pathogenic ★★ same condition
TGFB2 p.Arg302Cys Pathogenic/Likely pathogenic ★★ same condition
TGFB2 p.Arg302His Pathogenic/Likely pathogenic ★★ same condition
TGFB2 p.Arg320Cys Pathogenic/Likely pathogenic ★★ same condition
TGFB2 p.Tyr341Ter 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/tgfb2-p-ala88pro (accessed [today's date]).

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