Is ACACB p.His497= (c.1491C>T) pathogenic?

ACACB p.His497= (c.1491C>T) is classified Likely benign in ACACB (ClinVar, No assertion criteria, 1 submitter; last evaluated 2023-02-13). Ultra-rare (popmax 0.0164%, mid); Associated with ACACB-related disorder.

What condition is associated with ACACB p.His497= (c.1491C>T)?

ACACB p.His497= (c.1491C>T) is associated with ACACB-related disorder (ClinVar).

How common is ACACB p.His497= (c.1491C>T) in the general population?

ACACB p.His497= (c.1491C>T) is ultra-rare (popmax 0.0164%, mid) (gnomAD).

ACACB p.His497=

c.1491C>T · rs149869894 · VCV3051352

Likely benign No assertion criteria

Classification

Likely benign

ClinVar

Review

No assertion criteria ☆☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0164%, mid)

Conditions

ACACB-related disorder

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 -20	GERP -4.2
Overall
CADD	1.937	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0164% Middle Eastern · 1/6,084 alleles

Filtering AF 0.00511% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00468%

Overall 0.00514% 83/1,613,844 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0164%	6,084
European (non-Finnish)	0.00627%	15,945
African / African-American	0.004%	24,973
Remaining individualsnot grpmax-eligible	0.0032%	31,242
East Asian	0.00223%	44,890
Admixed American	0.00167%	59,984
South Asian	0.0011%	91,034

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: ACACB
Protein: p.His497=
Coding: c.1491C>T
MANE Select: NM_001093
dbSNP: rs149869894
Type: single nucleotide variant
Location: chr12:109179141 (GRCh38)
Gene constraint: LOEUF 0.843 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 79.29 · 11 PDB
Residue 497: the biotin carboxylation domain; the atp-grasp domain; a β-strand

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

Disease context

ACACB-related disorder

Similar variants

ACACB p.Arg939Ser Conflicting classifications of pathogenicity ★ ⚠ same condition
ACACB p.Phe578Leu Uncertain significance ★ ⚠ same condition
ACACB p.Ser1199= Conflicting classifications of pathogenicity ★ same condition
ACACB p.Glu1608Lys Uncertain significance ⚠ same condition
ACACB p.Met1253Thr Uncertain significance ⚠ same condition
ACACB p.Met2164Thr Uncertain significance ⚠ same condition
ACACB c.1117+3A>G Likely benign same condition
ACACB c.1819-7A>G Likely benign 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/acacb-p-his497 (accessed [today's date]).

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