EPM2A p.Lys258=
c.774G>A · rs1014840416 · VCV1086271
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.005%, amr)
Conditions
1
progressive myoclonus epilepsy
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.024 | moderately benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP -12 | GERP -3.9 |
| Overall | ||
| CADD | 0.097 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.005%
Admixed American · 3/60,010 alleles
Filtering AF
0.00133%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.000668%
Overall
0.000186%
3/1,614,098 alleles · very rare
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
- EPM2A
- Protein
- p.Lys258=
- Coding
- c.774G>A
- MANE Select
- NM_005670
- dbSNP
- rs1014840416
- Type
- single nucleotide variant
- Location
- chr6:145627638 (GRCh38)
- Gene constraint
- LOEUF 1.191 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 34.25 · 2 PDB
- Residue 258
- an α-helix; the tyrosine-protein phosphatase domain
Similar variants
- EPM2A c.301+1G>T Pathogenic ★★ same condition
- EPM2A c.302-1G>C Pathogenic/Likely pathogenic ★★ same condition
- EPM2A c.302-2A>G Pathogenic ★★ same condition
- EPM2A p.Arg108Cys Pathogenic/Likely pathogenic ★★ same condition
- EPM2A p.Arg171His Pathogenic/Likely pathogenic ★★ same condition
- EPM2A p.Arg241Ter Pathogenic/Likely pathogenic ★★ same condition
- EPM2A p.Gly279Cys Pathogenic/Likely pathogenic ★★ same condition
- EPM2A p.Gly279Ser Pathogenic/Likely pathogenic ★★ same condition
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/epm2a-p-lys258 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown