SIM1 p.Leu26=
c.76T>C · rs1484244684 · VCV750231
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0165%, mid)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP 4.7 | GERP 1.7, phastCons 1 |
| Overall | ||
| CADD | 11.86 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0165%
Middle Eastern · 1/6,062 alleles
Filtering AF
2.8e-05%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 1.1e-05%
Overall
0.000186%
3/1,614,074 alleles · ultra-rare
exomes 3/1,461,814 · genomes 0/152,260 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.0165% | 6,062 |
| European (non-Finnish) | 0.000169% | 589,981 |
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
- SIM1
- Protein
- p.Leu26=
- Coding
- c.76T>C
- MANE Select
- NM_005068
- dbSNP
- rs1484244684
- Type
- single nucleotide variant
- Location
- chr6:100463393 (GRCh38)
- Gene constraint
- LOEUF 0.332 · pLI 1.00 · ClinGen HI 0/3 (gnomAD)
- Structure
- AlphaFold pLDDT 60.70
- Residue 26
- the bhlh domain
Similar variants
- SIM1 p.Cys434Ter Pathogenic ★★ same type
- SIM1 p.Ala495Gly Uncertain significance ★★ ⚠ same type
- SIM1 p.Arg374Trp Uncertain significance ★★ ⚠ same type
- SIM1 p.Arg548Gln Uncertain significance ★★ ⚠ same type
- SIM1 p.Arg550His Uncertain significance ★★ ⚠ same type
- SIM1 p.Cys605Tyr Uncertain significance ★★ ⚠ same type
- SIM1 p.Gln704Leu Uncertain significance ★★ ⚠ same type
- SIM1 p.Glu552Lys 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/sim1-p-leu26 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown