A2M p.Ala844=
c.2532G>A · rs114155623 · VCV714506
Benign
Multiple submitters
Classification
Benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
low-frequency (popmax 3.44%, afr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.013 | strongly benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP -10 | GERP -6.1 |
| Overall | ||
| CADD | 3.789 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
3.44%
African / African-American · 2,579/75,038 alleles
Filtering AF
3.33%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 3.28%
Overall
0.21%
3,395/1,613,994 alleles · low-frequency
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 3.44% | 29 |
| Ashkenazi Jewishnot grpmax-eligible | 0.79% | 127 |
| Admixed American | 0.371% | 269 |
| Remaining individualsnot grpmax-eligible | 0.294% | 340 |
| Middle Eastern | 0.148% | 674 |
| European (non-Finnish) | 0.0136% | 7,374 |
| South Asian | 0.00659% | 15,180 |
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
- A2M
- Protein
- p.Ala844=
- Coding
- c.2532G>A
- MANE Select
- NM_000014
- dbSNP
- rs114155623
- Type
- single nucleotide variant
- Location
- chr12:9090420 (GRCh38)
- Gene constraint
- LOEUF 0.765 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 81.61 · 13 PDB
- Residue 844
- a disulfide bond
Similar variants
- A2M p.Ala844Val Benign same residue
- A2M c.3756+4G>A Benign/Likely benign ★★ same type
- A2M p.Asp277Asn Benign ★★ same type
- A2M p.Ile1000Val Benign ★★ same type
- A2M p.Pro261Leu Benign ★★ same type
- A2M p.Tyr1152= Benign/Likely benign ★★ same type
- A2M p.Val120= Likely benign ★★ same type
- A2M p.Val129= 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/a2m-p-ala844 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown