Is ARAP2 p.Arg342Ser (c.1026A>T) pathogenic?

ARAP2 p.Arg342Ser (c.1026A>T) is classified Uncertain significance in ARAP2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-13). AlphaMissense: likely benign (0.1301); Very rare (popmax 0.00768%, nfe).

How common is ARAP2 p.Arg342Ser (c.1026A>T) in the general population?

ARAP2 p.Arg342Ser (c.1026A>T) is very rare (popmax 0.00768%, nfe) (gnomAD).

What do computational predictors say about ARAP2 p.Arg342Ser (c.1026A>T)?

AlphaMissense predicts likely benign (score 0.1301) — an in-silico prediction, not a clinical call.

ARAP2 p.Arg342Ser

c.1026A>T · VCV4130294

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1301 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00768%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1301	likely benign
REVEL	0.041	moderately benign-leaning
SaProt	LLR -4.74	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 0.5	GERP -1.1, phastCons 0.54
Regional constraint	o/e 1.07	unconstrained · MANE · 162 kb · p 0.0019 · regional, not allelic
Overall
CADD	18.49	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 0.00768% European (non-Finnish) · 90/1,171,868 alleles

Filtering AF 0.00635% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00588%

Overall 0.0058% 93/1,604,222 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00768%	13,021
Finnishnot grpmax-eligible	0.00312%	32,003
Remaining individualsnot grpmax-eligible	0.00161%	62,134

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: ARAP2
Protein: p.Arg342Ser
Coding: c.1026A>T
MANE Select: NM_015230
Type: single nucleotide variant
Location: chr4:36213258 (GRCh38)
Gene constraint: LOEUF 0.884 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 67.42 · 2 PDB

Full ARAP2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ARAP2 p.Arg342Ile Uncertain significance ★ ⚠ same residue
ARAP2 p.Ala1241Thr Uncertain significance ★ ⚠ same type
ARAP2 p.Ala1261Thr Uncertain significance ★ ⚠ same type
ARAP2 p.Ala1261Val Uncertain significance ★ ⚠ same type
ARAP2 p.Ala1353Glu Uncertain significance ★ ⚠ same type
ARAP2 p.Ala1375Pro Uncertain significance ★ ⚠ same type
ARAP2 p.Ala1421Ser Uncertain significance ★ ⚠ same type
ARAP2 p.Ala1421Thr 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/arap2-p-arg342ser (accessed [today's date]).

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