Is ARHGAP39 p.Lys62Arg (c.185A>G) pathogenic?

ARHGAP39 p.Lys62Arg (c.185A>G) is classified Uncertain significance in ARHGAP39 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-02). AlphaMissense: likely benign (0.1897); Ultra-rare (popmax 0.034%, mid).

How common is ARHGAP39 p.Lys62Arg (c.185A>G) in the general population?

ARHGAP39 p.Lys62Arg (c.185A>G) is ultra-rare (popmax 0.034%, mid) (gnomAD).

What do computational predictors say about ARHGAP39 p.Lys62Arg (c.185A>G)?

AlphaMissense predicts likely benign (score 0.1897) — an in-silico prediction, not a clinical call.

ARHGAP39 p.Lys62Arg

c.185A>G · VCV4137051

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1897 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.034%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1897	likely benign
REVEL	0.097	moderately benign-leaning
SaProt	LLR -9.27	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 7.4	GERP 1.9, phastCons 1
Regional constraint	o/e 0.89	unconstrained · MANE · 24 kb · p 0.25 · regional, not allelic
Overall
CADD	24.4	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

Grpmax group 0.034% Middle Eastern · 2/5,890 alleles

Filtering AF 0.00598% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00248%

Overall 0.00191% 30/1,568,916 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.034%	2,945
Admixed American	0.00952%	10,505
African / African-American	0.00539%	18,558
Finnishnot grpmax-eligible	0.00334%	29,901
Remaining individualsnot grpmax-eligible	0.00164%	60,834
European (non-Finnish)	0.00138%	72,354

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: ARHGAP39
Protein: p.Lys62Arg
Coding: c.185A>G
MANE Select: NM_025251
Type: single nucleotide variant
Location: chr8:144581173 (GRCh38)
Gene constraint: LOEUF 0.658 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 59.42

Full ARHGAP39 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ARHGAP39 p.Arg933Cys Uncertain significance ★★ ⚠ same type
ARHGAP39 p.Ala227= Benign ★★ same type
ARHGAP39 p.Thr818= Benign ★★ same type
ARHGAP39 p.Ala1033Val Uncertain significance ★ ⚠ same type
ARHGAP39 p.Ala1056Val Uncertain significance ★ ⚠ same type
ARHGAP39 p.Ala120Val Uncertain significance ★ ⚠ same type
ARHGAP39 p.Ala322Asp Uncertain significance ★ ⚠ same type
ARHGAP39 p.Ala322Thr Uncertain significance ★ ⚠ 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/arhgap39-p-lys62arg (accessed [today's date]).

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