ASNS p.Leu50=
c.148T>C · rs370903540 · VCV1078486
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00223%, eas)
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 0.88 | GERP -3.3, phastCons 0.016 |
| Overall | ||
| CADD | 2.938 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00223%
East Asian · 1/44,894 alleles
Filtering AF
0.000359%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00026%
Overall
0.00062%
10/1,614,112 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| East Asiangrpmax | 0.00223% | 44,894 |
| European (non-Finnish) | 0.000763% | 131,117 |
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
- ASNS
- Protein
- p.Leu50=
- Coding
- c.148T>C
- MANE Select
- NM_001673
- dbSNP
- rs370903540
- Type
- single nucleotide variant
- Location
- chr7:97869009 (GRCh38)
- Gene constraint
- LOEUF 0.745 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 94.36 · 3 PDB
- Residue 50
- the glutamine amidotransferase type-2 domain; a binding site
Similar variants
- ASNS c.1030+1G>A Likely pathogenic ★★ same type
- ASNS c.1138-1G>A Likely pathogenic ★★ same type
- ASNS c.1239-2A>T Likely pathogenic ★★ same type
- ASNS c.1320+1G>C Likely pathogenic ★★ same type
- ASNS c.1320+1G>T Likely pathogenic ★★ same type
- ASNS c.1321-1G>A Likely pathogenic ★★ same type
- ASNS c.1476+1G>A Pathogenic ★★ same type
- ASNS c.1476+2T>C Likely pathogenic ★★ 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/asns-p-leu50 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown