Is ACADSB p.Pro262= (c.786G>A) pathogenic?

ACADSB p.Pro262= (c.786G>A) is classified Benign/Likely benign in ACADSB (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-02-01). Low-frequency (popmax 1.27%, afr); Associated with 2-methylbutyryl-CoA dehydrogenase deficiency.

What condition is associated with ACADSB p.Pro262= (c.786G>A)?

ACADSB p.Pro262= (c.786G>A) is associated with 2-methylbutyryl-CoA dehydrogenase deficiency (ClinVar).

How common is ACADSB p.Pro262= (c.786G>A) in the general population?

ACADSB p.Pro262= (c.786G>A) is low-frequency (popmax 1.27%, afr) (gnomAD).

How is 2-methylbutyryl-CoA dehydrogenase deficiency inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

ACADSB p.Pro262=

c.786G>A · rs76111609 · VCV299079

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

low-frequency (popmax 1.27%, afr)

Conditions

2-methylbutyryl-CoA dehydrogenase deficiency

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 -5.3	GERP -5.1
Overall
CADD	3.416	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 1.27% African / African-American · 949/75,014 alleles

Filtering AF 1.2% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.17%

Overall 0.0756% 1,220/1,613,770 alleles · low-frequency exomes 693/1,461,544 · genomes 527/152,226 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	1.27%	79
Admixed American	0.148%	674
Remaining individualsnot grpmax-eligible	0.122%	822
Middle Eastern	0.115%	866
South Asian	0.0637%	1,570
East Asian	0.00446%	22,430
European (non-Finnish)	0.00331%	30,251

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: ACADSB
Protein: p.Pro262=
Coding: c.786G>A
MANE Select: NM_001609
dbSNP: rs76111609
Type: single nucleotide variant
Location: chr10:123043150 (GRCh38)
Gene constraint: LOEUF 0.891 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 91.47 · 1 PDB
Residue 262: a β-strand

Full ACADSB gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

2-methylbutyryl-CoA dehydrogenase deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For 2-methylbutyryl-CoA dehydrogenase deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

ACADSB p.Pro262Leu Uncertain significance ★★ ⚠ same residue
ACADSB c.1128+1G>A Likely pathogenic ★★ same condition
ACADSB c.1228+1G>A Likely pathogenic ★★ same condition
ACADSB c.303+3A>G Pathogenic/Likely pathogenic ★★ same condition
ACADSB p.Cys308Tyr Pathogenic/Likely pathogenic ★★ same condition
ACADSB p.Gln99Ter Pathogenic/Likely pathogenic ★★ same condition
ACADSB p.Glu387Lys Pathogenic/Likely pathogenic ★★ same condition
ACADSB p.Gly410Ser Pathogenic/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/acadsb-p-pro262 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown