Is PEX2 p.Ser79= (c.237A>G) pathogenic?

PEX2 p.Ser79= (c.237A>G) is classified Likely benign in PEX2 (ClinVar, Multiple submitters, 6 submitters; last evaluated 2025-12-28). Rare (popmax 0.167%, afr); Associated with peroxisome biogenesis disorder 5A (Zellweger).

What condition is associated with PEX2 p.Ser79= (c.237A>G)?

PEX2 p.Ser79= (c.237A>G) is associated with peroxisome biogenesis disorder 5A (Zellweger) (ClinVar).

How common is PEX2 p.Ser79= (c.237A>G) in the general population?

PEX2 p.Ser79= (c.237A>G) is rare (popmax 0.167%, afr) (gnomAD).

PEX2 p.Ser79=

c.237A>G · rs138220337 · VCV288170

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 6 submitters

gnomAD v4.1

Rare

rare (popmax 0.167%, afr)

Conditions

peroxisome biogenesis disorder 5A (Zellweger)

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 -3.3	GERP -4.9
Overall
CADD	1.599	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.167% African / African-American · 125/75,046 alleles

Filtering AF 0.143% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.134%

Overall 0.0083% 134/1,614,212 alleles · rare exomes 43/1,461,880 · genomes 91/152,332 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.167%	600
Admixed American	0.00833%	12,006
Remaining individualsnot grpmax-eligible	0.0064%	15,628

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: PEX2
Protein: p.Ser79=
Coding: c.237A>G
MANE Select: NM_000318
dbSNP: rs138220337
Type: single nucleotide variant
Location: chr8:76983942 (GRCh38)
Gene constraint: LOEUF 1.057 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 81.17
Residue 79: a UniProt-annotated variant site (in pbd5a)

Full PEX2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

peroxisome biogenesis disorder 5A (Zellweger) — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

PEX2 p.Ser79fs Likely pathogenic ★ same residue
PEX2 c.-17-2A>G Pathogenic/Likely pathogenic ★★ same condition
PEX2 p.Arg119Ter Pathogenic ★★ same condition
PEX2 p.Arg125Ter Pathogenic/Likely pathogenic ★★ same condition
PEX2 p.Gln31Ter Pathogenic/Likely pathogenic ★★ same condition
PEX2 p.Gln78Ter Pathogenic/Likely pathogenic ★★ same condition
PEX2 p.Gln96Ter Pathogenic ★★ same condition
PEX2 p.Glu168Ter 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/pex2-p-ser79 (accessed [today's date]).

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