Is CLPB p.Arg531Trp (c.1591C>T) pathogenic?

CLPB p.Arg531Trp (c.1591C>T) is classified Conflicting classifications of pathogenicity in CLPB (ClinVar, Conflicting submitters, 5 submitters; last evaluated 2022-09-01). AlphaMissense: likely pathogenic (0.9984); Absent from gnomAD v4.1; Associated with 3-methylglutaconic aciduria, type VIIA.

What condition is associated with CLPB p.Arg531Trp (c.1591C>T)?

CLPB p.Arg531Trp (c.1591C>T) is associated with 3-methylglutaconic aciduria, type VIIA, 3-methylglutaconic aciduria, type VIIB (ClinVar).

How common is CLPB p.Arg531Trp (c.1591C>T) in the general population?

CLPB p.Arg531Trp (c.1591C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CLPB p.Arg531Trp (c.1591C>T)?

AlphaMissense predicts likely pathogenic (score 0.9984) — an in-silico prediction, not a clinical call.

CLPB p.Arg531Trp

c.1591C>T · rs1949512456 · VCV869400

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 5 submitters

AlphaMissense

likely pathogenic

0.9984 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

3-methylglutaconic aciduria, type VIIA

Computational evidence

Protein change
AlphaMissense	0.9984	likely pathogenic · top 4% in CLPB
REVEL	0.822	moderately pathogenic-leaning
SaProt	LLR -16.90	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.2	GERP -1.9, phastCons 1
Regional constraint	o/e 0.89	unconstrained · MANE · 2,250 bp · p 0.067 · regional, not allelic
Overall
CADD	29.1	PHRED · no single calibrated threshold — expert panels disagree

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM R561W vs ClinVar R531W) — verify the residue.

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: CLPB
Protein: p.Arg531Trp
Coding: c.1591C>T
MANE Select: NM_001258392
dbSNP: rs1949512456
Type: single nucleotide variant
Location: chr11:72294414 (GRCh38)
Gene constraint: LOEUF 0.643 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 72.52 · 7 PDB
Residue 531: the 'regulatory; slows atpase and disaggregase activities' region

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

Disease context

3-methylglutaconic aciduria, type VIIA — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: 3-methylglutaconic aciduria, type VIIB

Similar variants

CLPB p.Arg531Gln Conflicting classifications of pathogenicity ★ ⚠ same residue
CLPB p.Arg531Gly Pathogenic same residue
CLPB c.1066+1G>A Pathogenic/Likely pathogenic ★★ same condition
CLPB c.455+1G>A Likely pathogenic ★★ same condition
CLPB c.873+1G>A Pathogenic/Likely pathogenic ★★ same condition
CLPB c.874-2A>G Likely pathogenic ★★ same condition
CLPB p.Arg178Ter Pathogenic ★★ same condition
CLPB p.Arg312Ter 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/clpb-p-arg531trp (accessed [today's date]).

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