Is MCEE p.Ala7fs (c.19dup) pathogenic?

MCEE p.Ala7fs (c.19dup) is classified Pathogenic in MCEE (ClinVar, Single submitter, 1 submitter; last evaluated 2024-03-24). Very rare (popmax 0.00017%, nfe); Associated with methylmalonic acidemia due to methylmalonyl-CoA epimerase deficiency.

What condition is associated with MCEE p.Ala7fs (c.19dup)?

MCEE p.Ala7fs (c.19dup) is associated with methylmalonic acidemia due to methylmalonyl-CoA epimerase deficiency (ClinVar).

How common is MCEE p.Ala7fs (c.19dup) in the general population?

MCEE p.Ala7fs (c.19dup) is very rare (popmax 0.00017%, nfe) (gnomAD).

MCEE p.Ala7fs

Q: How is Methylmalonic acidemia due to methylmalonyl-CoA epimerase deficiency inherited?

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

c.19dup · rs2465931432 · VCV2830026

Pathogenic Single submitter

Classification

Pathogenic

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

Consequence

frameshift

predicted LoF

gnomAD v4.1

Rare

very rare (popmax 0.00017%, nfe)

Conditions

methylmalonic acidemia due to methylmalonyl-CoA epimerase deficiency

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	frameshift	predicted loss-of-function
NMD	predicted	premature termination codon in exon 1 of 3
Splicing
SpliceAI	—	not assessed · substitutions only
Constraint at this position
Conservation	phyloP -0.92	GERP 0.78

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00017% European (non-Finnish) · 2/1,178,280 alleles

Filtering AF 2.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.1e-05%

Overall 0.000124% 2/1,608,218 alleles · very rare exomes 2/1,455,898 · genomes 0/152,320 · joint denominator

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: MCEE
Protein: p.Ala7fs
Coding: c.19dup
MANE Select: NM_032601
dbSNP: rs2465931432
Type: Duplication
Location: chr2:71130200 (GRCh38)
Gene constraint: LOEUF 0.867 · pLI 0.41 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 87.27 · 2 PDB

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

Disease context

methylmalonic acidemia due to methylmalonyl-CoA epimerase deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Methylmalonic acidemia due to methylmalonyl-CoA epimerase deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood, Infancy

Similar variants

MCEE p.Asp36fs Pathogenic ★ same condition
MCEE p.Ser17fs Pathogenic ★ same condition
MCEE c.379-644A>G Likely pathogenic ★★ same condition
MCEE p.Arg47Ter Pathogenic ★★ same condition
MCEE p.Arg47Leu Uncertain significance ★★ ⚠ same condition
MCEE p.Asn115Lys Uncertain significance ★★ ⚠ same condition
MCEE p.Glu174Gln Uncertain significance ★★ same condition
MCEE p.Ile159Thr Uncertain significance ★★ ⚠ 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/mcee-p-ala7fs (accessed [today's date]).

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