Is ETFB p.Arg85Gln (c.254G>A) pathogenic?

ETFB p.Arg85Gln (c.254G>A) is classified Uncertain significance in ETFB (ClinVar, Multiple submitters, 2 submitters; last evaluated 2022-08-02). AlphaMissense: likely benign (0.2023); Very rare (popmax 0.00169%, nfe); Associated with Inborn genetic diseases.

What condition is associated with ETFB p.Arg85Gln (c.254G>A)?

ETFB p.Arg85Gln (c.254G>A) is associated with Inborn genetic diseases, multiple acyl-CoA dehydrogenase deficiency (ClinVar).

How common is ETFB p.Arg85Gln (c.254G>A) in the general population?

ETFB p.Arg85Gln (c.254G>A) is very rare (popmax 0.00169%, nfe) (gnomAD).

What do computational predictors say about ETFB p.Arg85Gln (c.254G>A)?

AlphaMissense predicts likely benign (score 0.2023) — an in-silico prediction, not a clinical call.

ETFB p.Arg85Gln

c.254G>A · rs747881617 · VCV2142861

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.2023 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00169%, nfe)

Missense predictors

2/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.2023	likely benign
REVEL	0.821	moderately pathogenic-leaning
SaProt	LLR -13.64	damaging
⇒ REVEL and SaProt call this damaging; AlphaMissense does not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.5	GERP 1.4, phastCons 1
Regional constraint	o/e 0.83	unconstrained · MANE · 21 kb · p 0.0022 · regional, not allelic
Overall
CADD	29.1	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

Grpmax group 0.00169% European (non-Finnish) · 20/1,180,012 alleles

Filtering AF 0.00111% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0009%

Overall 0.00143% 23/1,613,960 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00169%	59,001
Remaining individualsnot grpmax-eligible	0.0016%	62,486
African / African-American	0.00134%	74,902
South Asian	0.0011%	91,096

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: ETFB
Protein: p.Arg85Gln
Coding: c.254G>A
MANE Select: NM_001985
dbSNP: rs747881617
Type: single nucleotide variant
Location: chr19:51353253 (GRCh38)
Gene constraint: LOEUF 1.1 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 96.19 · 4 PDB
Residue 85: a β-strand

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

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: multiple acyl-CoA dehydrogenase deficiency

Similar variants

ETFB p.Arg85Ter Pathogenic/Likely pathogenic ★★ same residue
ETFB p.Arg85= Likely benign ★★ same residue
ETFB p.Arg85Pro Uncertain significance ★ ⚠ same residue
ETFB c.375+1G>A Likely pathogenic ★★ same condition
ETFB c.375+1G>T Likely pathogenic ★★ same condition
ETFB p.Arg164Gln Pathogenic/Likely pathogenic ★★ ⚠ same condition
ETFB p.Arg21Ter Pathogenic/Likely pathogenic ★★ same condition
ETFB p.Cys42Arg 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/etfb-p-arg85gln (accessed [today's date]).

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