TTC19 p.Glu227=
c.681A>G · rs568597965 · VCV721512
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.0253%, afr)
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 0.89 | GERP -0.67, phastCons 0.98 |
| Overall | ||
| CADD | 9.223 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0253%
African / African-American · 19/75,006 alleles
Filtering AF
0.0165%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0137%
Overall
0.00198%
32/1,613,892 alleles · ultra-rare
exomes 19/1,461,624 · genomes 13/152,268 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.0253% | 3,948 |
| Middle Eastern | 0.0165% | 6,056 |
| Admixed American | 0.005% | 20,007 |
| European (non-Finnish) | 0.000763% | 131,091 |
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
- TTC19
- Protein
- p.Glu227=
- Coding
- c.681A>G
- MANE Select
- NM_017775
- dbSNP
- rs568597965
- Type
- single nucleotide variant
- Location
- chr17:16025021 (GRCh38)
- Gene constraint
- LOEUF 1.049 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 80.28
Similar variants
- TTC19 c.581+1G>C Pathogenic/Likely pathogenic ★★ same type
- TTC19 p.Gln195Ter Pathogenic/Likely pathogenic ★★ same type
- TTC19 p.Leu185Pro Pathogenic/Likely pathogenic ★★ same type
- TTC19 p.Leu219Ter Pathogenic ★★ same type
- TTC19 c.581+4A>C Uncertain significance ★★ same type
- TTC19 c.994+3A>T Uncertain significance ★★ same type
- TTC19 p.Ala122Thr Uncertain significance ★★ ⚠ same type
- TTC19 p.Ala200Val 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/ttc19-p-glu227 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown