Is PGAM2 p.Ile121= (c.363C>T) pathogenic?

PGAM2 p.Ile121= (c.363C>T) is classified Likely benign in PGAM2 (ClinVar, Single submitter, 2 submitters; last evaluated 2024-04-26). Very rare (popmax 0.00801%, afr); Associated with glycogen storage disease due to phosphoglycerate mutase deficiency.

What condition is associated with PGAM2 p.Ile121= (c.363C>T)?

PGAM2 p.Ile121= (c.363C>T) is associated with glycogen storage disease due to phosphoglycerate mutase deficiency (ClinVar).

How common is PGAM2 p.Ile121= (c.363C>T) in the general population?

PGAM2 p.Ile121= (c.363C>T) is very rare (popmax 0.00801%, afr) (gnomAD).

PGAM2 p.Ile121=

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.363C>T · rs768642477 · VCV1602236

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00801%, afr)

Conditions

glycogen storage disease due to phosphoglycerate mutase deficiency

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not looked up on this page · why
Constraint at this position
Conservation	phyloP 2.5	GERP 0.7, phastCons 1
Overall
CADD	14.0	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00801% African / African-American · 6/74,874 alleles

Filtering AF 0.00347% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00229%

Overall 0.000496% 8/1,613,818 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00801%	12,479
Admixed American	0.00167%	59,986
Remaining individualsnot grpmax-eligible	0.0016%	62,482

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: PGAM2
Protein: p.Ile121=
Coding: c.363C>T
MANE Select: NM_001014436 · reported on NM_000290
dbSNP: rs768642477
Type: single nucleotide variant
Location: chr7:44065167 (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-ile121 (accessed [today's date]).

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