Is ERBB2 p.Cys235= (c.705C>T) pathogenic?

ERBB2 p.Cys235= (c.705C>T) is classified Likely benign in ERBB2 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-05-10). Absent from gnomAD v4.1.

How common is ERBB2 p.Cys235= (c.705C>T) in the general population?

ERBB2 p.Cys235= (c.705C>T) is absent from gnomAD v4.1 (gnomAD).

ERBB2 p.Cys235=

c.705C>T · rs2145504340 · VCV1558310

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,612,364)

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 0.84	GERP -2, phastCons 1
Overall
CADD	11.52	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,612,364). 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: ERBB2
Protein: p.Cys235=
Coding: c.705C>T
MANE Select: NM_004448
dbSNP: rs2145504340
Type: single nucleotide variant
Location: chr17:39710147 (GRCh38)
Gene constraint: LOEUF 0.518 · pLI 0.06 (gnomAD)
Structure: AlphaFold pLDDT 74.65 · 63 PDB
Residue 235: a disulfide bond

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-cys235 (accessed [today's date]).

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