Is ARAP1 p.Arg645His (c.1934G>A) pathogenic?

ARAP1 p.Arg645His (c.1934G>A) is classified Uncertain significance in ARAP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-29). AlphaMissense: likely benign (0.1094); Ultra-rare (popmax 0.0178%, eas).

How common is ARAP1 p.Arg645His (c.1934G>A) in the general population?

ARAP1 p.Arg645His (c.1934G>A) is ultra-rare (popmax 0.0178%, eas) (gnomAD).

What do computational predictors say about ARAP1 p.Arg645His (c.1934G>A)?

AlphaMissense predicts likely benign (score 0.1094) — an in-silico prediction, not a clinical call.

ARAP1 p.Arg645His

c.1934G>A · VCV4641903

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1094 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0178%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1094	likely benign
REVEL	0.145	moderately benign-leaning
SaProt	LLR -9.93	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 3	GERP -1.6, phastCons 0.99
Regional constraint	o/e 0.80	unconstrained · MANE · 15 kb · p 7.9e-09 · regional, not allelic
Overall
CADD	23.3	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 0.0178% East Asian · 8/44,878 alleles

Filtering AF 0.00884% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00641%

Overall 0.00254% 41/1,613,840 alleles · ultra-rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.0178%	5,610
Admixed American	0.01%	10,002
African / African-American	0.00267%	37,469
European (non-Finnish)	0.00195%	51,304
Remaining individualsnot grpmax-eligible	0.0016%	62,472
South Asian	0.0011%	91,088

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: ARAP1
Protein: p.Arg645His
Coding: c.1934G>A
MANE Select: NM_001040118
Type: single nucleotide variant
Location: chr11:72704210 (GRCh38)
Gene constraint: LOEUF 0.572 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.81 · 1 PDB
Residue 645: the arf-gap domain

Full ARAP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ARAP1 p.Arg645Cys Uncertain significance ★ ⚠ same residue
ARAP1 p.Gln1047Glu Benign ★★ same type
ARAP1 p.Pro1039= Benign ★★ same type
ARAP1 p.Pro254Leu Benign ★★ same type
ARAP1 p.Val1408Met Benign ★★ ⚠ same type
ARAP1 p.Ala1046Ser Uncertain significance ★ ⚠ same type
ARAP1 p.Ala1124Thr Uncertain significance ★ ⚠ same type
ARAP1 p.Ala1199Thr 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/arap1-p-arg645his (accessed [today's date]).

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