Is CNNM3 p.Arg182Gln (c.545G>A) pathogenic?

CNNM3 p.Arg182Gln (c.545G>A) is classified Uncertain significance in CNNM3 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-06-24). AlphaMissense: likely benign (0.1116); Very rare (popmax 0.00347%, afr).

How common is CNNM3 p.Arg182Gln (c.545G>A) in the general population?

CNNM3 p.Arg182Gln (c.545G>A) is very rare (popmax 0.00347%, afr) (gnomAD).

What do computational predictors say about CNNM3 p.Arg182Gln (c.545G>A)?

AlphaMissense predicts likely benign (score 0.1116) — an in-silico prediction, not a clinical call.

CNNM3 p.Arg182Gln

c.545G>A · VCV4230862

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1116 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00347%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1116	likely benign
REVEL	0.086	moderately benign-leaning
SaProt	LLR -8.07	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 4.7	GERP -1.9, phastCons 1
Regional constraint	o/e 1.16	unconstrained · MANE · 849 bp · p 0.0017 · regional, not allelic
Overall
CADD	23.6	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 0.00347% African / African-American · 2/57,674 alleles

Filtering AF 0.000575% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000215%

Overall 0.00136% 2/146,882 alleles · very rare

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: CNNM3
Protein: p.Arg182Gln
Coding: c.545G>A
MANE Select: NM_017623
Type: single nucleotide variant
Location: chr2:96816822 (GRCh38)
Gene constraint: LOEUF 1.23 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 67.63 · 7 PDB
Residue 182: the cnnm transmembrane domain

Full CNNM3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CNNM3 p.Ala221Gly Uncertain significance ★★ ⚠ same type
CNNM3 p.Ala128Val Uncertain significance ★ ⚠ same type
CNNM3 p.Ala142Thr Uncertain significance ★ ⚠ same type
CNNM3 p.Ala146Val Uncertain significance ★ ⚠ same type
CNNM3 p.Ala158Thr Uncertain significance ★ ⚠ same type
CNNM3 p.Ala162Glu Uncertain significance ★ ⚠ same type
CNNM3 p.Ala176Thr Uncertain significance ★ ⚠ same type
CNNM3 p.Ala191Thr 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/cnnm3-p-arg182gln (accessed [today's date]).

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