SPEN p.Arg308Ter
c.922C>T · rs772105874 · VCV1805886
Pathogenic
Multiple submitters
Classification
Pathogenic
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
Consequence
nonsense (stop-gain)
predicted LoF
gnomAD v4.1
Absent
absent from gnomAD v4.1
Conditions
1
Radio-Tartaglia syndrome
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Consequence | nonsense (stop-gain) | predicted loss-of-function in a haploinsufficient gene (ClinGen) |
|---|---|---|
| NMD | predicted | premature termination codon in exon 4 of 15 |
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP 3.2 | GERP 1.3, phastCons 1 |
| Overall | ||
| CADD | 36.0 | PHRED · no single calibrated threshold — expert panels disagree |
Predicted loss-of-function is descriptive, not an applied PVS1 code.
Population frequency
gnomAD v4.1 · exomes + genomes
Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.
Variant & gene context
- Gene
- SPEN
- Protein
- p.Arg308Ter
- Coding
- c.922C>T
- MANE Select
- NM_015001
- dbSNP
- rs772105874
- Type
- single nucleotide variant
- Location
- chr1:15909361 (GRCh38)
- Gene constraint
- LOEUF 0.094 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
- Residue 308
- the 'disordered' region; a DNA-binding region
Similar variants
- SPEN p.Arg1170Ter Pathogenic ★★ same condition
- SPEN p.Arg2337Ter Likely pathogenic ★★ same condition
- SPEN p.Arg3168Ter Pathogenic/Likely pathogenic ★★ same condition
- SPEN p.Arg732Ter Uncertain significance ★★ same condition
- SPEN p.Asp2606Glu Uncertain significance ★★ ⚠ same condition
- SPEN p.Glu967Gln Uncertain significance ★★ ⚠ same condition
- SPEN p.Lys2341Arg Uncertain significance ★★ ⚠ same condition
- SPEN p.Pro1262Ser 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/spen-p-arg308ter (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown