Is FIG4 p.Arg576= (c.1728A>G) pathogenic?

FIG4 p.Arg576= (c.1728A>G) is classified Uncertain significance in FIG4 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-08). Very rare (popmax 0.00267%, afr); Associated with Charcot-Marie-Tooth disease type 4.

What condition is associated with FIG4 p.Arg576= (c.1728A>G)?

FIG4 p.Arg576= (c.1728A>G) is associated with Charcot-Marie-Tooth disease type 4 (ClinVar).

How common is FIG4 p.Arg576= (c.1728A>G) in the general population?

FIG4 p.Arg576= (c.1728A>G) is very rare (popmax 0.00267%, afr) (gnomAD).

FIG4 p.Arg576=

c.1728A>G · rs1006163300 · VCV963139

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

Charcot-Marie-Tooth disease type 4

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal.
REVEL	0.108	moderately benign-leaning
Splicing
SpliceAI	Δ0.81	donor gain · deltas
Pangolin	Δ0.26	gain · loss 0.09 · agrees with SpliceAI · independent
Constraint at this position
Conservation	phyloP 0.097	GERP -3.2, phastCons 0.079
Overall
CADD	20.3	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00267% African / African-American · 2/74,930 alleles

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

Overall 0.000558% 9/1,613,962 alleles · very rare exomes 6/1,461,754 · genomes 3/152,208 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00267%	37,465
East Asian	0.00223%	44,878
Remaining individualsnot grpmax-eligible	0.0016%	62,474
South Asian	0.0011%	91,092
European (non-Finnish)	0.000339%	294,989

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: FIG4
Protein: p.Arg576=
Coding: c.1728A>G
MANE Select: NM_014845
dbSNP: rs1006163300
Type: single nucleotide variant
Location: chr6:109766873 (GRCh38)
Gene constraint: LOEUF 0.966 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 80.65 · 1 PDB

Full FIG4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Charcot-Marie-Tooth disease type 4 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

FIG4 c.1040-1G>A Likely pathogenic ★★ same condition
FIG4 c.1584-1G>T Likely pathogenic ★★ same condition
FIG4 c.1948+1G>A Likely pathogenic ★★ same condition
FIG4 c.1949-10T>G Pathogenic/Likely pathogenic ★★ same condition
FIG4 c.2459+1G>A Pathogenic ★★ same condition
FIG4 c.877-2A>C Pathogenic/Likely pathogenic ★★ same condition
FIG4 p.Arg152Ter Pathogenic/Likely pathogenic ★★ same condition
FIG4 p.Arg183Ter 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/fig4-p-arg576 (accessed [today's date]).

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