PER2 p.Tyr140=
c.420C>T · rs146385738 · VCV745755
Benign
Single submitter
Classification
Benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
rare (popmax 0.204%, afr)
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 -7.3 | GERP -4.6 |
| Overall | ||
| CADD | 0.361 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.204%
African / African-American · 153/75,072 alleles
Filtering AF
0.177%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.167%
Overall
0.0148%
239/1,614,194 alleles · rare
exomes 135/1,461,822 · genomes 104/152,372 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.204% | 491 |
| Admixed American | 0.0316% | 3,160 |
| Remaining individualsnot grpmax-eligible | 0.0224% | 4,465 |
| South Asian | 0.0143% | 7,006 |
| European (non-Finnish) | 0.00339% | 29,500 |
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
- PER2
- Protein
- p.Tyr140=
- Coding
- c.420C>T
- MANE Select
- NM_022817
- dbSNP
- rs146385738
- Type
- single nucleotide variant
- Location
- chr2:238275771 (GRCh38)
- Gene constraint
- LOEUF 0.67 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 53.96 · 4 PDB
Similar variants
- PER2 p.Arg401His Uncertain significance ★★ ⚠ same type
- PER2 p.Glu184Ala Uncertain significance ★★ ⚠ same type
- PER2 p.Ala655= Benign ★★ same type
- PER2 p.Arg401Cys Benign ★★ same type
- PER2 p.Arg820= Likely benign ★★ same type
- PER2 p.Cys1084Arg Likely benign ★★ same type
- PER2 p.His476Asn Likely benign ★★ same type
- PER2 p.Phe393= Benign ★★ 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/per2-p-tyr140 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown