MRTFB p.Val866Phe
c.2596G>T · rs114506300 · VCV3210236
Uncertain significance
Single submitter
Classification
Uncertain significance
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.095%, afr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.102 | moderately benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
| Constraint at this position | ||
| Conservation | phyloP 4.5 | GERP 0.62, phastCons 1 |
| Regional constraint | o/e 1.01 | unconstrained · MANE · 43 kb · p 0.71 · regional, not allelic |
| Overall | ||
| CADD | 21.4 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.095%
African / African-American · 71/74,718 alleles
Filtering AF
0.0773%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0707%
Overall
0.00477%
77/1,612,970 alleles · ultra-rare
exomes 30/1,461,390 · genomes 47/151,580 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.095% | 1,052 |
| Admixed American | 0.00834% | 11,984 |
| 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
- MRTFB
- Protein
- p.Val866Phe
- Coding
- c.2596G>T
- MANE Select
- NM_001308142
- dbSNP
- rs114506300
- Type
- single nucleotide variant
- Location
- chr16:14252395 (GRCh38)
- Gene constraint
- LOEUF 0.351 · pLI 1.00 (gnomAD)
- Structure
- AlphaFold pLDDT 53.38
- Residue 866
- the 'disordered' region
Similar variants
- MRTFB p.Asn47= Benign/Likely benign ★★ same type
- MRTFB p.Ser643= Benign ★★ same type
- MRTFB p.Thr9= Benign ★★ same type
- MRTFB p.Ala91Pro Pathogenic ★ same type
- MRTFB p.Leu160Pro Likely pathogenic ★ same type
- MRTFB c.693+1G>T Uncertain significance ★ same type
- MRTFB p.Ala1080Val Uncertain significance ★ same type
- MRTFB p.Ala138Glu 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/mrtfb-p-val866phe (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown