Is ERG p.Pro266Arg (c.797C>G) pathogenic?

ERG p.Pro266Arg (c.797C>G) is classified Uncertain significance in ERG (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-11). AlphaMissense: likely benign (0.1859); Absent from gnomAD v4.1.

How common is ERG p.Pro266Arg (c.797C>G) in the general population?

ERG p.Pro266Arg (c.797C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ERG p.Pro266Arg (c.797C>G)?

AlphaMissense predicts likely benign (score 0.1859) — an in-silico prediction, not a clinical call.

ERG p.Pro266Arg

c.797C>G · VCV4250670

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1859 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,567,206)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1859	likely benign
REVEL	0.039	moderately benign-leaning
SaProt	LLR -7.94	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 9.9	GERP 1.1, phastCons 1
Regional constraint	o/e 0.68	unconstrained · MANE · 19 kb · p 0.00011 · regional, not allelic
Overall
CADD	23.7	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

No allele count reported in gnomAD v4.1 (AN 1,567,206). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: ERG
Protein: p.Pro266Arg
Coding: c.797C>G
MANE Select: NM_182918
Type: single nucleotide variant
Location: chr21:38392393 (GRCh38)
Gene constraint: LOEUF 0.234 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 60.25 · 8 PDB
Residue 266: the 'disordered' region

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

Similar variants

ERG p.Asp363Gly Uncertain significance ★★ ⚠ same type
ERG c.389-2A>G Uncertain significance ★ same type
ERG c.40-56923A>G Uncertain significance ★ same type
ERG c.674-1G>A Uncertain significance ★ same type
ERG p.Ala368Thr Uncertain significance ★ ⚠ same type
ERG p.Ala387Pro Uncertain significance ★ ⚠ same type
ERG p.Ala88Asp Uncertain significance ★ ⚠ same type
ERG p.Arg178Gly 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/erg-p-pro266arg (accessed [today's date]).

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