Is RAB3GAP2 p.Arg36= (c.108G>A) pathogenic?

RAB3GAP2 p.Arg36= (c.108G>A) is classified Likely benign in RAB3GAP2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-08-19). Very rare (popmax 0.00225%, eas); Associated with Warburg micro syndrome 2.

What condition is associated with RAB3GAP2 p.Arg36= (c.108G>A)?

RAB3GAP2 p.Arg36= (c.108G>A) is associated with Warburg micro syndrome 2, Martsolf syndrome (ClinVar).

How common is RAB3GAP2 p.Arg36= (c.108G>A) in the general population?

RAB3GAP2 p.Arg36= (c.108G>A) is very rare (popmax 0.00225%, eas) (gnomAD).

RAB3GAP2 p.Arg36=

c.108G>A · rs765320215 · VCV1533944

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00225%, eas)

Conditions

Warburg micro syndrome 2

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 3.1	GERP 0.87, phastCons 1
Overall
CADD	15.08	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00225% East Asian · 1/44,538 alleles

Overall 0.000125% 2/1,605,724 alleles · very rare exomes 2/1,453,982 · genomes 0/151,742 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00225%	44,538
Admixed American	0.0017%	58,772

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: RAB3GAP2
Protein: p.Arg36=
Coding: c.108G>A
MANE Select: NM_012414
dbSNP: rs765320215
Type: single nucleotide variant
Location: chr1:220272230 (GRCh38)
Gene constraint: LOEUF 0.535 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 79.77 · 1 PDB
Residue 36: the 'disordered' region

Full RAB3GAP2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Warburg micro syndrome 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Martsolf syndrome

Similar variants

RAB3GAP2 p.Arg36Lys Uncertain significance ★ ⚠ same residue
RAB3GAP2 c.713-2A>C Likely pathogenic ★★ same condition
RAB3GAP2 p.Arg1213Ter Pathogenic ★★ same condition
RAB3GAP2 p.Arg426Cys Pathogenic/Likely pathogenic ★★ same condition
RAB3GAP2 c.*2171A>G Uncertain significance ★★ same condition
RAB3GAP2 p.Ala16Thr Uncertain significance ★★ ⚠ same condition
RAB3GAP2 p.Ala240Pro Uncertain significance ★★ ⚠ same condition
RAB3GAP2 p.Ala300Thr Uncertain significance ★★ ⚠ 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/rab3gap2-p-arg36 (accessed [today's date]).

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