AMPD2 p.His335=
c.1005T>C · rs372653890 · VCV1981958
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.492 | indeterminate |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP -20 | GERP -4.2 |
| Overall | ||
| CADD | 0.178 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Ashkenazi Jewishnot grpmax-eligible | 0.206% | 485 |
| Remaining individualsnot grpmax-eligible | 0.016% | 6,248 |
| European (non-Finnish)grpmax | 0.0011% | 90,769 |
Ashkenazi Jewish shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.
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
- AMPD2
- Protein
- p.His335=
- Coding
- c.1005T>C
- MANE Select
- NM_001368809
- dbSNP
- rs372653890
- Type
- single nucleotide variant
- Location
- chr1:109627828 (GRCh38)
- Gene constraint
- LOEUF 0.705 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 81.28 · 5 PDB
- Residue 335
- an α-helix
Disease context
hereditary spastic paraplegia 63 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatmentsAlso linked: pontocerebellar hypoplasia type 9
For Autosomal recessive spastic paraplegia type 63 (Orphanet):
- Inheritance
- Autosomal recessive
- Onset
- Infancy
Similar variants
- AMPD2 p.His335Tyr Uncertain significance ★ ⚠ same residue
- AMPD2 c.1698+1G>A Pathogenic/Likely pathogenic ★★ same condition
- AMPD2 p.Arg353Ter Pathogenic/Likely pathogenic ★★ same condition
- AMPD2 p.Arg449Ter Pathogenic/Likely pathogenic ★★ same condition
- AMPD2 p.Arg620His Pathogenic/Likely pathogenic ★★ same condition
- AMPD2 p.Arg789His Likely pathogenic ★★ same condition
- AMPD2 p.Glu174Ter Pathogenic/Likely pathogenic ★★ same condition
- AMPD2 c.1080+3G>A 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/ampd2-p-his335 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown