MRTFA p.Ala636=
c.1908G>A · rs143498125 · VCV1683018
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
rare (popmax 0.562%, mid)
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 2.7 | GERP 1.5, phastCons 1 |
| Overall | ||
| CADD | 14.7 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.562%
Middle Eastern · 34/6,054 alleles
Filtering AF
0.413%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.362%
Overall
0.0287%
463/1,611,362 alleles · rare
exomes 422/1,459,116 · genomes 41/152,246 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.562% | 178 |
| Ashkenazi Jewishnot grpmax-eligible | 0.122% | 821 |
| South Asian | 0.0692% | 1,445 |
| Admixed American | 0.055% | 1,818 |
| Remaining individualsnot grpmax-eligible | 0.0272% | 3,674 |
| European (non-Finnish) | 0.0225% | 4,452 |
| East Asian | 0.0134% | 7,472 |
| Finnishnot grpmax-eligible | 0.0081% | 12,342 |
| African / African-American | 0.00533% | 18,756 |
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.Ala636=
- Coding
- c.1908G>A
- MANE Select
- NM_020831
- dbSNP
- rs143498125
- Type
- single nucleotide variant
- Location
- chr22:40418830 (GRCh38)
- Gene constraint
- LOEUF 0.389 · pLI 1.00 (gnomAD)
- Structure
- AlphaFold pLDDT 56.59 · 2 PDB
Similar variants
- MRTFA p.Ala636Val 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-ala636 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown