ACADVL p.Pro89fs
c.266del · rs771808680 · VCV552361
ClinGen expert panel — ACADVL VCEP
Likely Pathogenic for very long chain acyl-CoA dehydrogenase deficiency. Applied ACMG criteria (verbatim):
PVS1 PM2_Supporting
Curation rationale (ClinGen, verbatim)
The c.266del variant in ACADVL is a frameshift predicted to cause a premature stop codon in biologically relevant exon 4/20 leading to nonsense mediated decay in a gene in which loss-of-function is an established disease mechanism (PVS1: PMIDs 9973285, 11590124). The variant has been identified in at least one individual identified by abnormal newborn screening results suggestive of very long-chain acyl-CoA dehydrogenase (VLCAD) deficiency without an additional ACADVL variant identified or follow-up plasma acylcarnitines (PMID: 26385305). The highest population minor allele frequency in gnomAD v2.1.1 is 0.00005437 in East Asian population, which is lower than the ClinGen ACADVL Variant Curation Expert Panel threshold (<0.001) for PM2_Supporting, meeting this criterion (PM2_Supporting). To our knowledge, functional assays have not been reported for this variant. In summary, this variant meets the criteria to be classified as LIKELY PATHOGENIC for autosomal recessive very long chain acyl-CoA dehydrogenase (VLCAD) deficiency based on the ACMG/AMP criteria applied, as specified by the ClinGen ACADVL Variant Curation Expert Panel: PVS1, PM2_Supporting (ACADVL VCEP specifications v2.0; Approved on 12/14/2021).
ClinGen Evidence Repository → · reported verbatim, not re-tallied by Sugi Variant.
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Consequence | frameshift | predicted loss-of-function |
|---|---|---|
| NMD | predicted | premature termination codon in exon 4 of 20 |
| Splicing | ||
| SpliceAI | — | not assessed · substitutions only |
| Constraint at this position | ||
| Conservation | phyloP 7.8 | GERP 2, phastCons 1 |
Predicted loss-of-function is descriptive, not an applied PVS1 code.
Population frequency
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
- ACADVL
- Protein
- p.Pro89fs
- Coding
- c.266del
- MANE Select
- NM_000018
- dbSNP
- rs771808680
- Type
- Deletion
- Location
- chr17:7220663 (GRCh38)
- Gene constraint
- LOEUF 1.077 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
- Structure
- AlphaFold pLDDT 90.65 · 3 PDB
- Residue 89
- the 'catalytic' region
Disease context
very long chain acyl-CoA dehydrogenase deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatmentsFor Very long chain acyl-CoA dehydrogenase deficiency (Orphanet):
- Inheritance
- Autosomal recessive
- Onset
- Infancy, Neonatal
- Prevalence
- 1-9 / 100 000 (Europe)
Similar variants
- ACADVL p.Pro89Ser Likely pathogenic ★★★ ⚠ same residue
- ACADVL c.1606-3_1606-2del Pathogenic ★★★ same condition
- ACADVL c.1752-3_1755del Pathogenic ★★★ same condition
- ACADVL c.343del Pathogenic ★★★ same condition
- ACADVL p.Ala347fs Likely pathogenic ★★★ same condition
- ACADVL p.Ala544fs Likely pathogenic ★★★ same condition
- ACADVL p.Ala577fs Likely pathogenic ★★★ same condition
- ACADVL p.Arg512fs 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/acadvl-p-pro89fs (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown