Is RAB3GAP2 p.Val477= (c.1431G>A) pathogenic?

RAB3GAP2 p.Val477= (c.1431G>A) is classified Likely benign in RAB3GAP2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-09-05). Very rare (popmax 0.00667%, afr); Associated with Martsolf syndrome.

What condition is associated with RAB3GAP2 p.Val477= (c.1431G>A)?

RAB3GAP2 p.Val477= (c.1431G>A) is associated with Martsolf syndrome, Warburg micro syndrome 2 (ClinVar).

How common is RAB3GAP2 p.Val477= (c.1431G>A) in the general population?

RAB3GAP2 p.Val477= (c.1431G>A) is very rare (popmax 0.00667%, afr) (gnomAD).

RAB3GAP2 p.Val477=

c.1431G>A · rs891492186 · VCV2184069

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00667%, afr)

Conditions

Martsolf syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.089	GERP -0.2, phastCons 0.52
Overall
CADD	8.185	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00667% African / African-American · 5/74,910 alleles

Filtering AF 0.00255% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00161%

Overall 0.000434% 7/1,613,942 alleles · very rare exomes 6/1,461,806 · genomes 1/152,136 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00667%	14,982
Remaining individualsnot grpmax-eligible	0.0016%	62,488
European (non-Finnish)	8.47e-05%	1,179,980

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.Val477=
Coding: c.1431G>A
MANE Select: NM_012414
dbSNP: rs891492186
Type: single nucleotide variant
Location: chr1:220191124 (GRCh38)
Gene constraint: LOEUF 0.535 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 79.77 · 1 PDB
Residue 477: a β-strand

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

Disease context

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

Also linked: Warburg micro syndrome 2

Similar variants

RAB3GAP2 p.Val477Met 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-val477 (accessed [today's date]).

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