BLM p.Val800=
c.2400C>A · rs2505455059 · VCV2025820
Uncertain significance
Single submitter
Classification
Uncertain significance
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Absent
absent from gnomAD v4.1
Conditions
1
Bloom syndrome
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal. | ||
| Splicing | ||
| SpliceAI | Δ0.66 | donor gain · deltas |
|---|---|---|
| Pangolin | Δ0.46 | gain · loss 0.01 · agrees with SpliceAI · independent |
| Constraint at this position | ||
| Conservation | phyloP 2.5 | GERP 0.1, phastCons 1 |
| Overall | ||
| CADD | 19.0 | PHRED · no single calibrated threshold — expert panels disagree |
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
- BLM
- Protein
- p.Val800=
- Coding
- c.2400C>A
- MANE Select
- NM_000057
- dbSNP
- rs2505455059
- Type
- single nucleotide variant
- Location
- chr15:90769225 (GRCh38)
- Gene constraint
- LOEUF 0.847 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
- Structure
- AlphaFold pLDDT 61.10 · 16 PDB
- Residue 800
- the helicase atp-binding domain; an α-helix
Disease context
Bloom syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatmentsFor Bloom syndrome (Orphanet):
- Inheritance
- Autosomal recessive
- Onset
- Antenatal, Neonatal
- Prevalence
- 1-9 / 100 000 (Specific population)
Similar variants
- BLM p.Val800Ile Uncertain significance ★ ⚠ same residue
- BLM c.1087+1G>A Likely pathogenic ★★ same condition
- BLM c.1088-1G>A Likely pathogenic ★★ same condition
- BLM c.1220+2T>C Likely pathogenic ★★ same condition
- BLM c.1220+2T>G Likely pathogenic ★★ same condition
- BLM c.1882+2T>C Likely pathogenic ★★ same condition
- BLM c.2074+1G>T Likely pathogenic ★★ same condition
- BLM c.2075-1G>A Likely pathogenic ★★ 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/blm-p-val800 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown