Is ACAP1 p.Arg551Pro (c.1652G>C) pathogenic?

ACAP1 p.Arg551Pro (c.1652G>C) is classified Uncertain significance in ACAP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-02). AlphaMissense: likely benign (0.0933); Absent from gnomAD v4.1.

How common is ACAP1 p.Arg551Pro (c.1652G>C) in the general population?

ACAP1 p.Arg551Pro (c.1652G>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ACAP1 p.Arg551Pro (c.1652G>C)?

AlphaMissense predicts likely benign (score 0.0933) — an in-silico prediction, not a clinical call.

ACAP1 p.Arg551Pro

c.1652G>C · VCV4214714

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0933 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0933	likely benign
REVEL	0.261	benign-leaning
SaProt	LLR -7.17	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 -0.58	GERP -4.5
Regional constraint	o/e 1.24	unconstrained · MANE · 661 bp · p 0.052 · regional, not allelic
Overall
CADD	8.079	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

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: ACAP1
Protein: p.Arg551Pro
Coding: c.1652G>C
MANE Select: NM_014716
Type: single nucleotide variant
Location: chr17:7348449 (GRCh38)
Gene constraint: LOEUF 0.579 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 84.92 · 7 PDB
Residue 551: the 'disordered' region; the 'prevents interaction with itgb1 when s-554 is not phosphorylated' region; the 'required for interaction with gulp1' region

Full ACAP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ACAP1 p.Arg551Trp Uncertain significance ★ ⚠ same residue
ACAP1 p.Val407Ala Uncertain significance ★★ ⚠ same type
ACAP1 p.Ala137Thr Uncertain significance ★ ⚠ same type
ACAP1 p.Ala418Asp Uncertain significance ★ ⚠ same type
ACAP1 p.Ala54Thr Uncertain significance ★ ⚠ same type
ACAP1 p.Ala58Asp Uncertain significance ★ ⚠ same type
ACAP1 p.Ala596Thr Uncertain significance ★ ⚠ same type
ACAP1 p.Ala636Glu 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/acap1-p-arg551pro (accessed [today's date]).

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