CTBP1 p.Ser219=
c.657C>T · rs781701519 · VCV2421384
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.011%, sas)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | — | not looked up on this page · why |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP -2.2 | GERP -3.7 |
| Overall | ||
| CADD | 3.445 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.011%
South Asian · 10/90,988 alleles
Filtering AF
0.00594%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00454%
Overall
0.00123%
18/1,459,292 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| South Asiangrpmax | 0.011% | 9,099 |
| Finnishnot grpmax-eligible | 0.00157% | 63,526 |
| African / African-American | 0.00133% | 74,998 |
| European (non-Finnish) | 0.000509% | 196,646 |
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
- CTBP1
- Protein
- p.Ser219=
- Coding
- c.657C>T
- dbSNP
- rs781701519
- Type
- single nucleotide variant
- Location
- chr4:1216063 (GRCh38)
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/ctbp1-p-ser219 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown