MARS2 p.Pro422=
c.1266A>G · VCV4741277
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.0387%, 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 -4.9 | GERP -2.8 |
| Overall | ||
| CADD | 1.815 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0387%
African / African-American · 29/74,944 alleles
Filtering AF
0.0277%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0239%
Overall
0.00198%
32/1,614,068 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.0387% | 2,584 |
| Admixed American | 0.00167% | 60,016 |
| South Asian | 0.0011% | 91,094 |
| European (non-Finnish) | 8.47e-05% | 1,180,044 |
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
- MARS2
- Protein
- p.Pro422=
- Coding
- c.1266A>G
- MANE Select
- NM_138395
- Type
- single nucleotide variant
- Location
- chr2:197706671 (GRCh38)
- Gene constraint
- LOEUF 0.952 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 89.66
Similar variants
- MARS2 p.Ala141Val Uncertain significance ★★ ⚠ same type
- MARS2 p.Ala402Ser Uncertain significance ★★ ⚠ same type
- MARS2 p.Arg142Trp Uncertain significance ★★ ⚠ same type
- MARS2 p.Arg224Gln Uncertain significance ★★ ⚠ same type
- MARS2 p.Arg409Gly Uncertain significance ★★ ⚠ same type
- MARS2 p.Arg414Ile Uncertain significance ★★ ⚠ same type
- MARS2 p.Arg568Gly Uncertain significance ★★ ⚠ same type
- MARS2 p.Arg592Gln 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/mars2-p-pro422 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown