Is ARAP1 p.Lys643Gln (c.1927A>C) pathogenic?

ARAP1 p.Lys643Gln (c.1927A>C) is classified Uncertain significance in ARAP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-25). AlphaMissense: likely pathogenic (0.934); Absent from gnomAD v4.1.

How common is ARAP1 p.Lys643Gln (c.1927A>C) in the general population?

ARAP1 p.Lys643Gln (c.1927A>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ARAP1 p.Lys643Gln (c.1927A>C)?

AlphaMissense predicts likely pathogenic (score 0.934) — an in-silico prediction, not a clinical call.

ARAP1 p.Lys643Gln

c.1927A>C · VCV4129711

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.934 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

2/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.934	likely pathogenic
REVEL	0.611	indeterminate
SaProt	LLR -13.13	damaging
⇒ AlphaMissense and SaProt both call this damaging; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.8	GERP 2.1, phastCons 1
Regional constraint	o/e 0.80	unconstrained · MANE · 15 kb · p 7.9e-09 · regional, not allelic
Overall
CADD	32.0	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: ARAP1
Protein: p.Lys643Gln
Coding: c.1927A>C
MANE Select: NM_001040118
Type: single nucleotide variant
Location: chr11:72704217 (GRCh38)
Gene constraint: LOEUF 0.572 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.81 · 1 PDB
Residue 643: the arf-gap domain

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

Similar variants

ARAP1 p.Lys643Thr 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-lys643gln (accessed [today's date]).

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