IFNAR2 p.Ser324=
c.972C>T · rs771561101 · VCV1541423
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0657%, mid)
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 -6.5 | GERP -8.1 |
| Overall | ||
| CADD | 0.387 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0657%
Middle Eastern · 4/6,084 alleles
Filtering AF
0.0224%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0135%
Overall
0.00235%
38/1,614,002 alleles · ultra-rare
exomes 37/1,461,842 · genomes 1/152,160 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.0657% | 1,521 |
| Admixed American | 0.00833% | 12,001 |
| Ashkenazi Jewishnot grpmax-eligible | 0.00676% | 14,803 |
| European (non-Finnish) | 0.00203% | 49,166 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,488 |
| African / African-American | 0.00134% | 74,894 |
| South Asian | 0.0011% | 91,090 |
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
- IFNAR2
- Protein
- p.Ser324=
- Coding
- c.972C>T
- MANE Select
- NM_001289125
- dbSNP
- rs771561101
- Type
- single nucleotide variant
- Location
- chr21:33262924 (GRCh38)
- Gene constraint
- LOEUF 0.761 · pLI 0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 64.86 · 9 PDB
- Residue 324
- a UniProt-annotated variant site (no effect on activation of stat1 upon ifna2 or ifng binding); the 'disordered' region
Similar variants
- IFNAR2 p.Ser324Asn Uncertain significance ★★ ⚠ same residue
- IFNAR2 c.840+1G>T Uncertain significance ★★ same type
- IFNAR2 p.Arg397Gly Uncertain significance ★★ ⚠ same type
- IFNAR2 p.Arg90Gly Uncertain significance ★★ ⚠ same type
- IFNAR2 p.Asn146Ser Uncertain significance ★★ ⚠ same type
- IFNAR2 p.Asn281Tyr Uncertain significance ★★ ⚠ same type
- IFNAR2 p.Asp198Gly Uncertain significance ★★ ⚠ same type
- IFNAR2 p.Asp437Gly 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/ifnar2-p-ser324 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown