Is FARS2 p.Val403Ala (c.1208T>C) pathogenic?

FARS2 p.Val403Ala (c.1208T>C) is classified Uncertain significance in FARS2 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-08-31). AlphaMissense: likely benign (0.1032); Absent from gnomAD v4.1; Associated with combined oxidative phosphorylation defect type 14.

What condition is associated with FARS2 p.Val403Ala (c.1208T>C)?

FARS2 p.Val403Ala (c.1208T>C) is associated with combined oxidative phosphorylation defect type 14 (ClinVar).

How common is FARS2 p.Val403Ala (c.1208T>C) in the general population?

FARS2 p.Val403Ala (c.1208T>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about FARS2 p.Val403Ala (c.1208T>C)?

AlphaMissense predicts likely benign (score 0.1032) — an in-silico prediction, not a clinical call.

FARS2 p.Val403Ala

Q: How is Combined oxidative phosphorylation defect type 14 inherited?

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

c.1208T>C · rs1775291062 · VCV835408

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1032 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

combined oxidative phosphorylation defect type 14

Computational evidence

Protein change
AlphaMissense	0.1032	likely benign
REVEL	0.103	moderately benign-leaning
SaProt	LLR -7.23	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6.9	GERP -0.98, phastCons 1
Regional constraint	o/e 0.90	unconstrained · MANE · 403 kb · p 0.021 · regional, not allelic
Overall
CADD	18.95	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: FARS2
Protein: p.Val403Ala
Coding: c.1208T>C
MANE Select: NM_006567
dbSNP: rs1775291062
Type: single nucleotide variant
Location: chr6:5613311 (GRCh38)
Gene constraint: LOEUF 1.015 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 90.17 · 9 PDB
Residue 403: the fdx-acb domain; a β-strand

Full FARS2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

combined oxidative phosphorylation defect type 14 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Combined oxidative phosphorylation defect type 14 (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

FARS2 p.Val403= Likely benign ★ same residue
FARS2 p.Arg307Ter Pathogenic/Likely pathogenic ★★ same condition
FARS2 p.Arg386Ter Pathogenic/Likely pathogenic ★★ same condition
FARS2 p.Arg419Cys Pathogenic/Likely pathogenic ★★ ⚠ same condition
FARS2 p.Arg419His Pathogenic/Likely pathogenic ★★ same condition
FARS2 p.Gln100Ter Pathogenic/Likely pathogenic ★★ same condition
FARS2 p.Gln216Ter Pathogenic ★★ same condition
FARS2 p.Gly309Ser 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/fars2-p-val403ala (accessed [today's date]).

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