ERBB2 p.Pro18=
c.54C>A · rs1227500688 · VCV1439360
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.013%, sas)
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 -0.36 | GERP -0.43, phastCons 0.076 |
| Overall | ||
| CADD | 10.76 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.013%
South Asian · 9/69,184 alleles
Filtering AF
0.0067%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00501%
Overall
0.00077%
11/1,428,518 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| South Asiangrpmax | 0.013% | 7,687 |
| European (non-Finnish) | 0.000183% | 546,379 |
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.Pro18=
- Coding
- c.54C>A
- MANE Select
- NM_004448
- dbSNP
- rs1227500688
- Type
- single nucleotide variant
- Location
- chr17:39700292 (GRCh38)
- Gene constraint
- LOEUF 0.518 · pLI 0.06 (gnomAD)
- Structure
- AlphaFold pLDDT 74.65 · 63 PDB
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-pro18 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown