Is CNOT3 p.Arg745Cys (c.2233C>T) pathogenic?

CNOT3 p.Arg745Cys (c.2233C>T) is classified Uncertain significance in CNOT3 (ClinVar, Single submitter, 1 submitter; last evaluated 2026-01-18). AlphaMissense: likely pathogenic (0.9929); Absent from gnomAD v4.1.

How common is CNOT3 p.Arg745Cys (c.2233C>T) in the general population?

CNOT3 p.Arg745Cys (c.2233C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CNOT3 p.Arg745Cys (c.2233C>T)?

AlphaMissense predicts likely pathogenic (score 0.9929) — an in-silico prediction, not a clinical call.

CNOT3 p.Arg745Cys

c.2233C>T · VCV3392632

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9929 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

2/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.9929	likely pathogenic
REVEL	0.262	benign-leaning
SaProt	LLR -13.39	damaging
⇒ AlphaMissense and SaProt call this damaging; REVEL does not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.7	GERP 1.6, phastCons 1
Regional constraint	o/e 0.29	constrained · MANE · 1,572 bp · p 2.5e-06 · regional, not allelic
Overall
CADD	32.0	PHRED · no single calibrated threshold — expert panels disagree

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: CNOT3
Protein: p.Arg745Cys
Coding: c.2233C>T
MANE Select: NM_014516
Type: single nucleotide variant
Location: chr19:54155378 (GRCh38)
Gene constraint: LOEUF 0.057 · pLI 1.00 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 68.53 · 6 PDB
Residue 745: the 'repressor domain' region; a UniProt-annotated variant site (in iddsadf); an α-helix

Full CNOT3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CNOT3 c.1904+2T>C Pathogenic/Likely pathogenic ★★ same type
CNOT3 p.Arg697Ter Pathogenic ★★ same type
CNOT3 p.Arg81Ser Likely pathogenic ★★ same type
CNOT3 p.Arg96Ter Pathogenic/Likely pathogenic ★★ same type
CNOT3 p.Thr86= Likely pathogenic ★★ same type
CNOT3 c.1905-7C>G Uncertain significance ★★ same type
CNOT3 c.483+6T>G Uncertain significance ★★ same type
CNOT3 p.Ala376Thr 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/cnot3-p-arg745cys (accessed [today's date]).

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