Is FECH p.Ser222Asn (c.665G>A) pathogenic?

FECH p.Ser222Asn (c.665G>A) is classified Uncertain significance in FECH (ClinVar, Single submitter, 1 submitter; last evaluated 2021-01-18). AlphaMissense: likely pathogenic (0.8589); Absent from gnomAD v4.1.

How common is FECH p.Ser222Asn (c.665G>A) in the general population?

FECH p.Ser222Asn (c.665G>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about FECH p.Ser222Asn (c.665G>A)?

AlphaMissense predicts likely pathogenic (score 0.8589) — an in-silico prediction, not a clinical call.

FECH p.Ser222Asn

c.665G>A · rs2122284610 · VCV1480773

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.8589 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.8589	likely pathogenic
REVEL	0.794	moderately pathogenic-leaning
SaProt	LLR -11.70	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6	GERP 1.8, phastCons 1
Regional constraint	o/e 0.81	unconstrained · MANE · 36 kb · p 2e-05 · regional, not allelic
Overall
CADD	25.8	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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: FECH
Protein: p.Ser222Asn
Coding: c.665G>A
MANE Select: NM_000140
dbSNP: rs2122284610
Type: single nucleotide variant
Location: chr18:57562914 (GRCh38)
Gene constraint: LOEUF 0.859 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 87.37 · 25 PDB
Residue 222: a β-strand

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

Similar variants

FECH c.1137+3A>G Pathogenic/Likely pathogenic ★★ same type
FECH c.314+2T>G Pathogenic/Likely pathogenic ★★ same type
FECH c.463+1G>C Pathogenic ★★ same type
FECH c.598+1G>T Pathogenic ★★ same type
FECH c.599-2A>G Pathogenic ★★ same type
FECH c.913-2A>G Likely pathogenic ★★ same type
FECH p.Arg115Ter Pathogenic/Likely pathogenic ★★ same type
FECH p.Arg298Ter Pathogenic/Likely pathogenic ★★ same type

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/fech-p-ser222asn (accessed [today's date]).

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