TK2 p.Ile136=
c.408T>C · rs771367884 · VCV1566297
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00534%, afr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP 4.7 | GERP 0.71, phastCons 1 |
| Overall | ||
| CADD | 9.333 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00534%
African / African-American · 4/74,946 alleles
Filtering AF
0.00175%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00104%
Overall
0.00031%
5/1,614,030 alleles · very rare
exomes 2/1,461,802 · genomes 3/152,228 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.00534% | 18,736 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,484 |
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
- TK2
- Protein
- p.Ile136=
- Coding
- c.408T>C
- MANE Select
- NM_004614
- dbSNP
- rs771367884
- Type
- single nucleotide variant
- Location
- chr16:66529035 (GRCh38)
- Gene constraint
- LOEUF 1.101 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 85.01
Similar variants
- TK2 c.156+2T>C Pathogenic/Likely pathogenic ★★ same type
- TK2 c.157-2A>G Pathogenic/Likely pathogenic ★★ same type
- TK2 p.Ala139Thr Pathogenic/Likely pathogenic ★★ same type
- TK2 p.Ala139Val Pathogenic/Likely pathogenic ★★ same type
- TK2 p.Arg104Cys Pathogenic/Likely pathogenic ★★ same type
- TK2 p.Arg130Gln Pathogenic/Likely pathogenic ★★ ⚠ same type
- TK2 p.Arg130Trp Pathogenic/Likely pathogenic ★★ same type
- TK2 p.Arg183Gly Pathogenic/Likely pathogenic ★★ 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/tk2-p-ile136 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown