ERBB2 p.Thr27=
c.81C>T · rs377542789 · VCV1114576
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00877%, nfe)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | <0.2 | all four deltas below 0.2 · C>A here scores Δ0.24 · evaluated, not missing |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP -4.9 | GERP -5.1 |
| Overall | ||
| CADD | 9.61 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00877%
European (non-Finnish) · 102/1,163,468 alleles
Filtering AF
0.00734%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00685%
Overall
0.00689%
109/1,581,926 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| European (non-Finnish)grpmax | 0.00877% | 11,407 |
| Remaining individualsnot grpmax-eligible | 0.00818% | 12,224 |
| Admixed American | 0.00176% | 56,794 |
| African / African-American | 0.00136% | 73,798 |
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.Thr27=
- Coding
- c.81C>T
- MANE Select
- NM_004448
- dbSNP
- rs377542789
- Type
- single nucleotide variant
- Location
- chr17:39706997 (GRCh38)
- Gene constraint
- LOEUF 0.518 · pLI 0.06 (gnomAD)
- Structure
- AlphaFold pLDDT 74.65 · 63 PDB
- Residue 27
- a disulfide bond; a β-strand
Similar variants
- ERBB2 p.Thr27Pro Uncertain significance ★ ⚠ same residue
- 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
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-thr27 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown