Is CPT2 p.Pro41= (c.123C>A) pathogenic?

CPT2 p.Pro41= (c.123C>A) is classified Likely benign in CPT2 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-07-31). Absent from gnomAD v4.1; Associated with carnitine palmitoyltransferase II deficiency.

What condition is associated with CPT2 p.Pro41= (c.123C>A)?

CPT2 p.Pro41= (c.123C>A) is associated with carnitine palmitoyltransferase II deficiency (ClinVar).

How common is CPT2 p.Pro41= (c.123C>A) in the general population?

CPT2 p.Pro41= (c.123C>A) is absent from gnomAD v4.1 (gnomAD).

How is Carnitine palmitoyltransferase II deficiency inherited?

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

CPT2 p.Pro41=

c.123C>A · rs898278662 · VCV1621530

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,539,456)

Conditions

carnitine palmitoyltransferase II deficiency

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 1.7	GERP 0.24, phastCons 1
Overall
CADD	14.29	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,539,456). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: CPT2
Protein: p.Pro41=
Coding: c.123C>A
MANE Select: NM_000098
dbSNP: rs898278662
Type: single nucleotide variant
Location: chr1:53197066 (GRCh38)
Gene constraint: LOEUF 1.038 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 94.52

Full CPT2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

carnitine palmitoyltransferase II deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Carnitine palmitoyltransferase II deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: All ages

Similar variants

CPT2 p.Pro41Leu Uncertain significance ★★ ⚠ same residue
CPT2 p.Pro41His Uncertain significance ★ same residue
CPT2 p.Pro41_Met43del Uncertain significance same residue
CPT2 c.340+1G>C Pathogenic/Likely pathogenic ★★ same condition
CPT2 c.340+5G>A Likely pathogenic ★★ same condition
CPT2 c.341-2A>G Pathogenic/Likely pathogenic ★★ same condition
CPT2 p.Ala67Gly Likely pathogenic ★★ ⚠ same condition
CPT2 p.Arg124Gln 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/cpt2-p-pro41 (accessed [today's date]).

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