Is RAB3GAP2 p.Leu889= (c.2667T>G) pathogenic?

RAB3GAP2 p.Leu889= (c.2667T>G) is classified Likely benign in RAB3GAP2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-12-28). Ultra-rare (popmax 0.0549%, nfe); Associated with Warburg micro syndrome 2.

What condition is associated with RAB3GAP2 p.Leu889= (c.2667T>G)?

RAB3GAP2 p.Leu889= (c.2667T>G) is associated with Warburg micro syndrome 2, Martsolf syndrome (ClinVar).

How common is RAB3GAP2 p.Leu889= (c.2667T>G) in the general population?

RAB3GAP2 p.Leu889= (c.2667T>G) is ultra-rare (popmax 0.0549%, nfe) (gnomAD).

RAB3GAP2 p.Leu889=

c.2667T>G · rs145550355 · VCV515550

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0549%, nfe)

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 0.37	GERP -0.056, phastCons 0.99
Overall
CADD	8.777	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0549% European (non-Finnish) · 648/1,180,006 alleles

Filtering AF 0.0513% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.05%

Overall 0.0416% 672/1,614,018 alleles · ultra-rare exomes 643/1,461,854 · genomes 29/152,164 · joint denominator

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.0549%	1,821
Remaining individualsnot grpmax-eligible	0.0272%	3,676
African / African-American	0.00934%	10,705

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.Leu889=
Coding: c.2667T>G
MANE Select: NM_012414
dbSNP: rs145550355
Type: single nucleotide variant
Location: chr1:220171031 (GRCh38)
Gene constraint: LOEUF 0.535 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 79.77 · 1 PDB

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 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
RAB3GAP2 p.Ala684Glu 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-leu889 (accessed [today's date]).

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