Is TXNRD2 p.Cys91Arg (c.271T>C) pathogenic?

TXNRD2 p.Cys91Arg (c.271T>C) is classified Uncertain significance in TXNRD2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-04-21). Very rare (popmax 0.00267%, afr); Associated with Cardiovascular phenotype.

What condition is associated with TXNRD2 p.Cys91Arg (c.271T>C)?

TXNRD2 p.Cys91Arg (c.271T>C) is associated with Cardiovascular phenotype (ClinVar).

How common is TXNRD2 p.Cys91Arg (c.271T>C) in the general population?

TXNRD2 p.Cys91Arg (c.271T>C) is very rare (popmax 0.00267%, afr) (gnomAD).

TXNRD2 p.Cys91Arg

c.271T>C · rs371539674 · VCV1795184

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00267%, afr)

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.779	moderately pathogenic-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 9.2	GERP 1.9, phastCons 1
Regional constraint	o/e 0.88	unconstrained · MANE · 65 kb · p 0.0019 · regional, not allelic
Overall
CADD	28.6	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00267% African / African-American · 2/74,848 alleles

Filtering AF 0.000443% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000166%

Overall 0.000186% 3/1,612,568 alleles · very rare exomes 1/1,460,706 · genomes 2/151,862 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00267%	37,424
European (non-Finnish)	8.48e-05%	1,179,940

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: TXNRD2
Protein: p.Cys91Arg
Coding: c.271T>C
MANE Select: NM_006440
dbSNP: rs371539674
Type: single nucleotide variant
Location: chr22:19918963 (GRCh38)
Gene constraint: LOEUF 1.18 · pLI <0.01 (gnomAD)
Residue 91: a disulfide bond

Full TXNRD2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

TXNRD2 c.104-3C>G Uncertain significance ★★ same condition
TXNRD2 c.1182+5G>A Uncertain significance ★★ same condition
TXNRD2 c.172+3A>G Uncertain significance ★★ same condition
TXNRD2 c.450-1G>A Uncertain significance ★★ same condition
TXNRD2 c.528+2T>C Uncertain significance ★★ same condition
TXNRD2 c.591+1G>A Uncertain significance ★★ same condition
TXNRD2 c.662+1G>A Uncertain significance ★★ same condition
TXNRD2 p.Ala131Gly 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/txnrd2-p-cys91arg (accessed [today's date]).

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