SMARCA2 p.Arg1260=
c.3780G>A · rs777556670 · VCV1531246
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00167%, amr)
Conditions
1
Inborn genetic diseases
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 1.8 | GERP 1.7, phastCons 1 |
| Overall | ||
| CADD | 9.978 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00167%
Admixed American · 1/60,006 alleles
Overall
0.000124%
2/1,614,072 alleles · very rare
exomes 2/1,461,782 · genomes 0/152,290 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.00167% | 60,006 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,500 |
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
- SMARCA2
- Protein
- p.Arg1260=
- Coding
- c.3780G>A
- MANE Select
- NM_003070
- dbSNP
- rs777556670
- Type
- single nucleotide variant
- Location
- chr9:2123736 (GRCh38)
- Gene constraint
- LOEUF 0.317 · pLI 1.00 · ClinGen HI 0/3 (gnomAD)
- Structure
- AlphaFold pLDDT 66.06 · 32 PDB
- Residue 1260
- an α-helix
Similar variants
- SMARCA2 p.Arg1260Gln Uncertain significance ★ ⚠ same residue
- SMARCA2 p.Ala1138Pro Pathogenic/Likely pathogenic ★★ same condition
- SMARCA2 p.Arg505Gln Pathogenic/Likely pathogenic ★★ ⚠ same condition
- SMARCA2 p.Ala1215Val Uncertain significance ★★ ⚠ same condition
- SMARCA2 p.Ala1389Ser Uncertain significance ★★ ⚠ same condition
- SMARCA2 p.Arg1266Gly Uncertain significance ★★ ⚠ same condition
- SMARCA2 p.Arg427Cys Uncertain significance ★★ ⚠ same condition
- SMARCA2 p.Glu1509Asp Uncertain significance ★★ ⚠ 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/smarca2-p-arg1260 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown