MRTFA p.Glu678=
c.2034G>A · rs778404892 · VCV1683000
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00494%, amr)
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 -4.7 |
| Overall | ||
| CADD | 1.422 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00494%
Admixed American · 2/40,488 alleles
Filtering AF
0.00243%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00212%
Overall
0.00263%
39/1,481,832 alleles · very rare
exomes 34/1,334,882 · genomes 5/146,950 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.00494% | 20,244 |
| European (non-Finnish) | 0.00329% | 30,398 |
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
- MRTFA
- Protein
- p.Glu678=
- Coding
- c.2034G>A
- MANE Select
- NM_020831
- dbSNP
- rs778404892
- Type
- single nucleotide variant
- Location
- chr22:40418704 (GRCh38)
- Gene constraint
- LOEUF 0.389 · pLI 1.00 (gnomAD)
- Structure
- AlphaFold pLDDT 56.59 · 2 PDB
- Residue 678
- the 'disordered' region
Similar variants
- MRTFA p.Glu678del Uncertain significance ★ same residue
- MRTFA p.Ala352Thr Uncertain significance ★★ ⚠ same type
- MRTFA p.Ala360Thr Uncertain significance ★★ ⚠ same type
- MRTFA p.Ala429Ser Uncertain significance ★★ ⚠ same type
- MRTFA p.Ala479Gly Uncertain significance ★★ ⚠ same type
- MRTFA p.Ala479Val Uncertain significance ★★ ⚠ same type
- MRTFA p.Ala534Thr Uncertain significance ★★ ⚠ same type
- MRTFA p.Ala537Val 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/mrtfa-p-glu678 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown