NANS p.Ser251=
c.753G>A · rs761794233 · VCV1923823
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00329%, sas)
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 -4 |
| Overall | ||
| CADD | 0.292 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00329%
South Asian · 3/91,080 alleles
Filtering AF
0.000875%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.000443%
Overall
0.000372%
6/1,614,142 alleles · very rare
exomes 6/1,461,882 · genomes 0/152,260 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| South Asiangrpmax | 0.00329% | 30,360 |
| European (non-Finnish) | 0.000254% | 393,343 |
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
- NANS
- Protein
- p.Ser251=
- Coding
- c.753G>A
- MANE Select
- NM_018946
- dbSNP
- rs761794233
- Type
- single nucleotide variant
- Location
- chr9:98080965 (GRCh38)
- Gene constraint
- LOEUF 1.053 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 96.04 · 1 PDB
Similar variants
- NANS p.Ser251Leu Uncertain significance ★ ⚠ same residue
- NANS p.Ser251Pro Uncertain significance ★ ⚠ same residue
- NANS c.448+1G>A Pathogenic/Likely pathogenic ★★ same type
- NANS p.Glu258Ter Pathogenic/Likely pathogenic ★★ same type
- NANS p.Ala102Thr Uncertain significance ★★ ⚠ same type
- NANS p.Arg264Gln Uncertain significance ★★ ⚠ same type
- NANS p.Arg267His Uncertain significance ★★ same type
- NANS p.Gln94Glu Uncertain significance ★★ ⚠ 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/nans-p-ser251 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown