Is FLG p.Ser774Arg (c.2322C>A) pathogenic?

FLG p.Ser774Arg (c.2322C>A) is classified Uncertain significance in FLG (ClinVar, Single submitter, 1 submitter; last evaluated 2022-06-07). AlphaMissense: ambiguous (0.3532); Very rare (popmax 0.00144%, nfe); Associated with Inborn genetic diseases.

What condition is associated with FLG p.Ser774Arg (c.2322C>A)?

FLG p.Ser774Arg (c.2322C>A) is associated with Inborn genetic diseases (ClinVar).

How common is FLG p.Ser774Arg (c.2322C>A) in the general population?

FLG p.Ser774Arg (c.2322C>A) is very rare (popmax 0.00144%, nfe) (gnomAD).

What do computational predictors say about FLG p.Ser774Arg (c.2322C>A)?

AlphaMissense predicts ambiguous (score 0.3532) — an in-silico prediction, not a clinical call.

FLG p.Ser774Arg

c.2322C>A · rs773163818 · VCV2367590

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.3532 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00144%, nfe)

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.3532	ambiguous
REVEL	0.052	moderately benign-leaning
SaProt	—	not scored · why
Splicing
SpliceAI	—	not looked up on this page · why
Constraint at this position
Conservation	phyloP -0.96	GERP -3.2
Overall
CADD	3.586	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL is an independent agreement signal.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00144% European (non-Finnish) · 17/1,179,952 alleles

Filtering AF 0.000878% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000717%

Overall 0.00118% 19/1,613,600 alleles · very rare

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.0032%	31,240
European (non-Finnish)grpmax	0.00144%	69,409

Remaining individuals shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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: FLG
Protein: p.Ser774Arg
Coding: c.2322C>A
dbSNP: rs773163818
Type: single nucleotide variant
Location: chr1:152312564 (GRCh38)

Full FLG 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

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/flg-p-ser774arg (accessed [today's date]).

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