Is ARAP1 p.Cys128Tyr (c.383G>A) pathogenic?

ARAP1 p.Cys128Tyr (c.383G>A) is classified Uncertain significance in ARAP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-12-26). AlphaMissense: likely benign (0.1002); Very rare (popmax 0.00401%, nfe).

How common is ARAP1 p.Cys128Tyr (c.383G>A) in the general population?

ARAP1 p.Cys128Tyr (c.383G>A) is very rare (popmax 0.00401%, nfe) (gnomAD).

What do computational predictors say about ARAP1 p.Cys128Tyr (c.383G>A)?

AlphaMissense predicts likely benign (score 0.1002) — an in-silico prediction, not a clinical call.

ARAP1 p.Cys128Tyr

c.383G>A · rs1857704172 · VCV3128209

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1002 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00401%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1002	likely benign
REVEL	0.055	moderately benign-leaning
SaProt	LLR -7.33	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 3.3	GERP 1.3, phastCons 1
Regional constraint	o/e 0.83	unconstrained · MANE · 477 bp · p 0.011 · regional, not allelic
Overall
CADD	21.4	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 0.00401% European (non-Finnish) · 40/996,660 alleles

Filtering AF 0.00302% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00266%

Overall 0.00322% 42/1,304,786 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00401%	24,917
African / African-American	0.00166%	60,132
South Asian	0.00124%	80,394

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.Cys128Tyr
Coding: c.383G>A
MANE Select: NM_001040118
dbSNP: rs1857704172
Type: single nucleotide variant
Location: chr11:72726746 (GRCh38)
Gene constraint: LOEUF 0.572 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.81 · 1 PDB
Residue 128: the 'disordered' region

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

Similar variants

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
ARAP1 p.Ala1389Thr 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-cys128tyr (accessed [today's date]).

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