Is PEX5 p.Arg31Trp (c.91C>T) pathogenic?

PEX5 p.Arg31Trp (c.91C>T) is classified Uncertain significance in PEX5 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-09-21). AlphaMissense: likely benign (0.1786); Very rare (popmax 0.00223%, eas); Associated with peroxisome biogenesis disorder 2B.

What condition is associated with PEX5 p.Arg31Trp (c.91C>T)?

PEX5 p.Arg31Trp (c.91C>T) is associated with peroxisome biogenesis disorder 2B (ClinVar).

How common is PEX5 p.Arg31Trp (c.91C>T) in the general population?

PEX5 p.Arg31Trp (c.91C>T) is very rare (popmax 0.00223%, eas) (gnomAD).

What do computational predictors say about PEX5 p.Arg31Trp (c.91C>T)?

AlphaMissense predicts likely benign (score 0.1786) — an in-silico prediction, not a clinical call.

PEX5 p.Arg31Trp

c.91C>T · rs767406855 · VCV1485279

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1786 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00223%, eas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Conditions

peroxisome biogenesis disorder 2B

Computational evidence

Protein change
AlphaMissense	0.1786	likely benign
REVEL	0.38	indeterminate
SaProt	LLR -9.27	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL is indeterminate.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.7	GERP 1.3, phastCons 1
Overall
CADD	23.8	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00223% East Asian · 1/44,852 alleles

Overall 0.000124% 2/1,614,108 alleles · very rare exomes 1/1,461,832 · genomes 1/152,276 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00223%	44,852
Remaining individualsnot grpmax-eligible	0.0016%	62,504

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: PEX5
Protein: p.Arg31Trp
Coding: c.91C>T
MANE Select: NM_001351132
dbSNP: rs767406855
Type: single nucleotide variant
Location: chr12:7190468 (GRCh38)
Gene constraint: LOEUF 0.768 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 70.28 · 11 PDB
Residue 31: the 'amphipathic helix 1 (ah1)' region

Full PEX5 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

peroxisome biogenesis disorder 2B — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

PEX5 p.Arg31Gln Uncertain significance ★★ ⚠ same residue
PEX5 p.Arg31= Likely benign ★ same residue
PEX5 c.449-2A>G Pathogenic/Likely pathogenic ★★ same condition
PEX5 c.552-1G>A Pathogenic/Likely pathogenic ★★ same condition
PEX5 c.847-2A>G Likely pathogenic ★★ same condition
PEX5 c.967-1G>A Likely pathogenic ★★ same condition
PEX5 p.Arg237Ter Pathogenic/Likely pathogenic ★★ same condition
PEX5 p.Arg276Ter 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/pex5-p-arg31trp (accessed [today's date]).

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