AGRN p.Ala889=
c.2667G>A · rs144205055 · VCV541209
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0658%, mid)
Conditions
1
congenital myasthenic syndrome 8
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 -6.4 | GERP -3.3 |
| Overall | ||
| CADD | 3.516 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0658%
Middle Eastern · 4/6,080 alleles
Filtering AF
0.0224%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0135%
Overall
0.0102%
165/1,610,800 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.0658% | 1,520 |
| Remaining individualsnot grpmax-eligible | 0.016% | 6,246 |
| Finnishnot grpmax-eligible | 0.0115% | 8,727 |
| European (non-Finnish) | 0.0111% | 9,007 |
| African / African-American | 0.00801% | 12,485 |
| South Asian | 0.00549% | 18,211 |
| Admixed American | 0.00333% | 29,991 |
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
- AGRN
- Protein
- p.Ala889=
- Coding
- c.2667G>A
- MANE Select
- NM_198576
- dbSNP
- rs144205055
- Type
- single nucleotide variant
- Location
- chr1:1045863 (GRCh38)
- Gene constraint
- LOEUF 0.73 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
- Structure
- AlphaFold pLDDT 69.79 · 1 PDB
- Residue 889
- the laminin egf-like 2 domain; a disulfide bond
Similar variants
- AGRN p.Ala889Val Uncertain significance ★★ same residue
- AGRN p.Ala889Glu Uncertain significance ★ same residue
- AGRN p.Ala889Thr Uncertain significance ★ same residue
- AGRN c.3632-1G>C Likely pathogenic ★★ same condition
- AGRN p.Arg1671Ter Pathogenic/Likely pathogenic ★★ same condition
- AGRN p.Arg834Ter Pathogenic/Likely pathogenic ★★ same condition
- AGRN p.Gly1582Arg Pathogenic ★★ same condition
- AGRN p.Gly1675Ser Pathogenic/Likely 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/agrn-p-ala889 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown