Is ACADS p.Arg171Trp (c.511C>T) pathogenic?

ACADS p.Arg171Trp (c.511C>T) is classified Benign/Likely benign in ACADS (ClinVar, Multiple submitters, 11 submitters; last evaluated 2025-07-18). AlphaMissense: likely benign (0.1683); Low-frequency (popmax 4.82%, nfe); Associated with short chain acyl-CoA dehydrogenase deficiency.

What condition is associated with ACADS p.Arg171Trp (c.511C>T)?

ACADS p.Arg171Trp (c.511C>T) is associated with short chain acyl-CoA dehydrogenase deficiency (ClinVar).

How common is ACADS p.Arg171Trp (c.511C>T) in the general population?

ACADS p.Arg171Trp (c.511C>T) is low-frequency (popmax 4.82%, nfe) (gnomAD).

How is Short chain acyl-CoA dehydrogenase deficiency inherited?

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

What do computational predictors say about ACADS p.Arg171Trp (c.511C>T)?

AlphaMissense predicts likely benign (score 0.1683) — an in-silico prediction, not a clinical call.

ACADS p.Arg171Trp

c.511C>T · rs1800556 · VCV3830

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 11 submitters

AlphaMissense

likely benign

0.1683 · ACMG-weighted

gnomAD v4.1

Rare

low-frequency (popmax 4.82%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

short chain acyl-CoA dehydrogenase deficiency

Computational evidence

Protein change
AlphaMissense	0.1683	likely benign
REVEL	0.289	benign-leaning
SaProt	LLR -9.22	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>A here scores Δ0.82 · evaluated, not missing
Constraint at this position
Conservation	phyloP 1	GERP -1.3, phastCons 0.27
Regional constraint	o/e 0.91	unconstrained · MANE · 14 kb · p 0.038 · regional, not allelic
Overall
CADD	22.1	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 4.82% European (non-Finnish) · 56,902/1,179,884 alleles

Filtering AF 4.79% ClinGen BA1/BS1 input FAF95, joint · FAF99 4.78%

Overall 4.13% 66,708/1,613,908 alleles · low-frequency

Ancestry group	Frequency	1 in
Finnishnot grpmax-eligible	6.3%	16
European (non-Finnish)grpmax	4.82%	21
Remaining individualsnot grpmax-eligible	3.78%	26
Amishnot grpmax-eligible	3.73%	27
Ashkenazi Jewishnot grpmax-eligible	2.41%	41
Admixed American	2.17%	46
Middle Eastern	1.37%	73
African / African-American	0.877%	114
South Asian	0.688%	145
East Asian	0.00223%	44,868

Finnish 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: ACADS
Protein: p.Arg171Trp
Coding: c.511C>T
MANE Select: NM_000017
dbSNP: rs1800556
Type: single nucleotide variant
Location: chr12:120737875 (GRCh38)
Gene constraint: LOEUF 0.852 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 93.58 · 4 PDB
Residue 171: a UniProt-annotated variant site (69% of wild-type acyl-coa dehydrogenase activity; confers susceptibility to ethylmalonicaciduria); a β-strand

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

Disease context

short chain acyl-CoA dehydrogenase deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Short chain acyl-CoA dehydrogenase deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood, Infancy, Neonatal

Similar variants

ACADS c.211-2A>G Likely pathogenic ★★ same condition
ACADS c.625-1G>A Likely pathogenic ★★ same condition
ACADS c.795+1G>A Pathogenic/Likely pathogenic ★★ same condition
ACADS p.Ala199Val Likely pathogenic ★★ ⚠ same condition
ACADS p.Arg107Cys Pathogenic ★★ ⚠ same condition
ACADS p.Arg272Cys Pathogenic/Likely pathogenic ★★ same condition
ACADS p.Arg325Gln Pathogenic/Likely pathogenic ★★ ⚠ same condition
ACADS p.Arg325Trp 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/acads-p-arg171trp (accessed [today's date]).

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