MAP2K1 p.Ala283=
c.849G>A · rs1452914602 · VCV1763609
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00333%, amr)
Conditions
1
RASopathy
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 -2.6 | GERP -4 |
| Overall | ||
| CADD | 6.242 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00333%
Admixed American · 2/60,000 alleles
Filtering AF
0.000553%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.000207%
Overall
0.00062%
10/1,613,892 alleles · very rare
exomes 9/1,461,740 · genomes 1/152,152 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.00333% | 30,000 |
| East Asian | 0.00223% | 44,876 |
| South Asian | 0.0022% | 45,537 |
| African / African-American | 0.00133% | 74,908 |
| European (non-Finnish) | 0.000339% | 295,011 |
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
- MAP2K1
- Protein
- p.Ala283=
- Coding
- c.849G>A
- MANE Select
- NM_002755
- dbSNP
- rs1452914602
- Type
- single nucleotide variant
- Location
- chr15:66485145 (GRCh38)
- Gene constraint
- LOEUF 0.515 · pLI 0.97 · ClinGen HI 0/3 (gnomAD)
- Structure
- AlphaFold pLDDT 84.05 · 99 PDB
- Residue 283
- the protein kinase domain; the 'raf1-binding' region
Similar variants
- MAP2K1 p.Ala283Val Benign ★★★ same residue
- MAP2K1 p.Arg108Leu Likely pathogenic ★★★ same condition
- MAP2K1 p.Asn122Asp Pathogenic ★★★ ⚠ same condition
- MAP2K1 p.Asp67Asn Pathogenic ★★★ same condition
- MAP2K1 p.Glu203Gly Pathogenic ★★★ same condition
- MAP2K1 p.Leu42Arg Likely pathogenic ★★★ same condition
- MAP2K1 p.Leu42Phe Pathogenic ★★★ same condition
- MAP2K1 p.Leu92Arg Pathogenic ★★★ same condition
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/map2k1-p-ala283 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown