AGRN p.Arg622Trp
c.1864C>T · rs142143178 · VCV650838
Conflicting classifications of pathogenicity
Conflicting submitters
Classification
Conflicting classifications of pathogenicity
ClinVar
Review
Conflicting submitters ★☆☆☆
ClinVar · 4 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0219%, nfe)
Conditions
1
congenital myasthenic syndrome 8
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.218 | benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | <0.2 | all four deltas below 0.2 · C>A here scores Δ0.21 · evaluated, not missing |
| Constraint at this position | ||
| Conservation | phyloP 2.1 | GERP 0.98, phastCons 0.96 |
| Regional constraint | o/e 1.03 | unconstrained · MANE · 26 kb · p 0.29 · regional, not allelic |
| Overall | ||
| CADD | 25.5 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0219%
European (non-Finnish) · 258/1,179,692 alleles
Filtering AF
0.0197%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0188%
Overall
0.0181%
292/1,610,832 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| European (non-Finnish)grpmax | 0.0219% | 4,572 |
| Remaining individualsnot grpmax-eligible | 0.0208% | 4,803 |
| Middle Eastern | 0.0165% | 6,076 |
| Admixed American | 0.015% | 6,660 |
| East Asian | 0.00669% | 14,940 |
| African / African-American | 0.00535% | 18,679 |
| South Asian | 0.00439% | 22,761 |
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.Arg622Trp
- Coding
- c.1864C>T
- MANE Select
- NM_198576
- dbSNP
- rs142143178
- Type
- single nucleotide variant
- Location
- chr1:1043888 (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 622
- the kazal-like 7 domain; a disulfide bond
Similar variants
- AGRN p.Arg622Gln 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
- AGRN c.1177+4A>G Uncertain significance ★★ same condition
- AGRN c.1384+6C>T Uncertain significance ★★ 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-arg622trp (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown