Is TGFB3 p.Ala71= (c.213C>T) pathogenic?

TGFB3 p.Ala71= (c.213C>T) is classified Likely benign in TGFB3 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2022-12-02). Very rare (popmax 0.00934%, afr); Associated with Rienhoff syndrome.

What condition is associated with TGFB3 p.Ala71= (c.213C>T)?

TGFB3 p.Ala71= (c.213C>T) is associated with Rienhoff syndrome, familial thoracic aortic aneurysm and aortic dissection (ClinVar).

How common is TGFB3 p.Ala71= (c.213C>T) in the general population?

TGFB3 p.Ala71= (c.213C>T) is very rare (popmax 0.00934%, afr) (gnomAD).

TGFB3 p.Ala71=

c.213C>T · rs753250192 · VCV543957

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00934%, afr)

Conditions

Rienhoff syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 1.9	GERP -1.6, phastCons 1
Overall
CADD	9.24	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00934% African / African-American · 7/74,930 alleles

Filtering AF 0.00437% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00309%

Overall 0.000496% 8/1,614,098 alleles · very rare exomes 3/1,461,894 · genomes 5/152,204 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00934%	10,704
European (non-Finnish)	8.47e-05%	1,180,043

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: TGFB3
Protein: p.Ala71=
Coding: c.213C>T
MANE Select: NM_003239
dbSNP: rs753250192
Type: single nucleotide variant
Location: chr14:75980681 (GRCh38)
Gene constraint: LOEUF 0.249 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 77.48 · 11 PDB
Residue 71: an α-helix

Full TGFB3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

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

Also linked: familial thoracic aortic aneurysm and aortic dissection

Similar variants

TGFB3 c.517-2A>G Likely pathogenic ★★ same condition
TGFB3 c.646+1G>C Likely pathogenic ★★ same condition
TGFB3 c.926+1G>A Likely pathogenic ★★ same condition
TGFB3 c.927-1G>C Likely pathogenic ★★ same condition
TGFB3 p.Arg148Ter Pathogenic/Likely pathogenic ★★ same condition
TGFB3 p.Arg300Gln Pathogenic ★★ same condition
TGFB3 p.Arg300Trp Pathogenic/Likely pathogenic ★★ same condition
TGFB3 p.Arg325Ter Pathogenic/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/tgfb3-p-ala71 (accessed [today's date]).

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