Is PGAM2 p.Gly148Arg (c.442G>C) pathogenic?

PGAM2 p.Gly148Arg (c.442G>C) is classified Uncertain significance in PGAM2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-09-05). AlphaMissense: likely benign (0.3297); Absent from gnomAD v4.1; Associated with glycogen storage disease due to phosphoglycerate mutase deficiency.

What condition is associated with PGAM2 p.Gly148Arg (c.442G>C)?

PGAM2 p.Gly148Arg (c.442G>C) is associated with glycogen storage disease due to phosphoglycerate mutase deficiency (ClinVar).

How common is PGAM2 p.Gly148Arg (c.442G>C) in the general population?

PGAM2 p.Gly148Arg (c.442G>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about PGAM2 p.Gly148Arg (c.442G>C)?

AlphaMissense predicts likely benign (score 0.3297) — an in-silico prediction, not a clinical call.

PGAM2 p.Gly148Arg

Q: How is Glycogen storage disease due to phosphoglycerate mutase deficiency inherited?

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

c.442G>C · rs117048953 · VCV2755621

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.3297 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

glycogen storage disease due to phosphoglycerate mutase deficiency

Computational evidence

Protein change
AlphaMissense	0.3297	likely benign
REVEL	0.306	indeterminate
SaProt	LLR -10.11	damaging
⇒ SaProt calls this damaging; AlphaMissense does not; REVEL makes no call.
Splicing
SpliceAI	—	not looked up on this page · why
Constraint at this position
Conservation	phyloP 4	GERP -0.42, phastCons 0.41
Regional constraint	o/e 0.98	unconstrained · MANE · 2,762 bp · p 0.7 · regional, not allelic
Overall
CADD	21.4	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

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: PGAM2
Protein: p.Gly148Arg
Coding: c.442G>C
MANE Select: NM_001014436 · reported on NM_000290
dbSNP: rs117048953
Type: single nucleotide variant
Location: chr7:44064985 (GRCh38)

Full PGAM2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

glycogen storage disease due to phosphoglycerate mutase deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Glycogen storage disease due to phosphoglycerate mutase deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Childhood

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/pgam2-p-gly148arg (accessed [today's date]).

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