Is ERBB2 p.Pro1147= (c.3441C>T) pathogenic?

ERBB2 p.Pro1147= (c.3441C>T) is classified Likely benign in ERBB2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-11-16). Rare (popmax 0.101%, amr).

How common is ERBB2 p.Pro1147= (c.3441C>T) in the general population?

ERBB2 p.Pro1147= (c.3441C>T) is rare (popmax 0.101%, amr) (gnomAD).

ERBB2 p.Pro1147=

c.3441C>T · rs112561362 · VCV1132112

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

rare (popmax 0.101%, amr)

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -6.4	GERP -4.8
Overall
CADD	0.032	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.101% Admixed American · 54/53,374 alleles

Filtering AF 0.0796% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0719%

Overall 0.0606% 950/1,567,572 alleles · rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.101%	988
European (non-Finnish)	0.0735%	1,361
Remaining individualsnot grpmax-eligible	0.0481%	2,079
South Asian	0.013%	7,665
African / African-American	0.00814%	12,290

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: ERBB2
Protein: p.Pro1147=
Coding: c.3441C>T
MANE Select: NM_004448
dbSNP: rs112561362
Type: single nucleotide variant
Location: chr17:39727717 (GRCh38)
Gene constraint: LOEUF 0.518 · pLI 0.06 (gnomAD)
Structure: AlphaFold pLDDT 74.65 · 63 PDB
Residue 1147: the 'disordered' region

Full ERBB2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ERBB2 p.Ala598Asp Uncertain significance ★★ ⚠ same type
ERBB2 p.Ala644Thr Uncertain significance ★★ ⚠ same type
ERBB2 p.Arg1048Cys Uncertain significance ★★ ⚠ same type
ERBB2 p.Arg188Cys Uncertain significance ★★ ⚠ same type
ERBB2 p.Arg188His Uncertain significance ★★ ⚠ same type
ERBB2 p.Arg190Gln Uncertain significance ★★ ⚠ same type
ERBB2 p.Arg203His Uncertain significance ★★ ⚠ same type
ERBB2 p.Arg217Cys 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/erbb2-p-pro1147 (accessed [today's date]).

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