CHRM2 p.Tyr18=
c.54T>C · rs1441209174 · VCV514639
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 3 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00659%, sas)
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 0.7 | GERP -1, phastCons 1 |
| Overall | ||
| CADD | 6.577 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00659%
South Asian · 6/91,064 alleles
Filtering AF
0.00286%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00195%
Overall
0.000434%
7/1,613,136 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| South Asiangrpmax | 0.00659% | 15,177 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,426 |
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
- CHRM2
- Protein
- p.Tyr18=
- Coding
- c.54T>C
- MANE Select
- NM_001006630
- dbSNP
- rs1441209174
- Type
- single nucleotide variant
- Location
- chr7:137014919 (GRCh38)
- Gene constraint
- LOEUF 0.555 · pLI 0.92 (gnomAD)
- Structure
- AlphaFold pLDDT 72.87 · 17 PDB
- Residue 18
- an α-helix
Similar variants
- CHRM2 p.Tyr18del Uncertain significance ★ same residue
- CHRM2 p.Ala265Val Uncertain significance ★★ ⚠ same type
- CHRM2 p.Arg52Cys Uncertain significance ★★ ⚠ same type
- CHRM2 p.Gln358His Uncertain significance ★★ ⚠ same type
- CHRM2 p.Glu305Gly Uncertain significance ★★ ⚠ same type
- CHRM2 p.Gly238Ala Uncertain significance ★★ ⚠ same type
- CHRM2 p.Gly254Val Uncertain significance ★★ ⚠ same type
- CHRM2 p.Gly277Glu 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/chrm2-p-tyr18 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown