Is CPT2 p.Thr442fs (c.1324dup) pathogenic?

CPT2 p.Thr442fs (c.1324dup) is classified Pathogenic/Likely pathogenic in CPT2 (ClinVar, Multiple submitters, 5 submitters; last evaluated 2025-10-13). Absent from gnomAD; Associated with carnitine palmitoyltransferase II deficiency.

How common is CPT2 p.Thr442fs (c.1324dup) in the general population?

CPT2 p.Thr442fs (c.1324dup) is absent from gnomAD (gnomAD).

How is Carnitine palmitoyltransferase II deficiency inherited?

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

CPT2 p.Thr442fs

Q: What condition is associated with CPT2 p.Thr442fs (c.1324dup)?

CPT2 p.Thr442fs (c.1324dup) is associated with carnitine palmitoyltransferase II deficiency, carnitine palmitoyl transferase II deficiency, severe infantile form, encephalopathy, acute, infection-induced, susceptibility to, 4 (ClinVar).

c.1324dup · rs1131691330 · VCV429340

Pathogenic/Likely pathogenic Multiple submitters

Classification

Pathogenic/Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

Consequence

frameshift

predicted LoF

gnomAD v4.1

Not reported

no gnomAD frequency available for this variant

Conditions

carnitine palmitoyltransferase II 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 4 of 5
Splicing
SpliceAI	—	not assessed · substitutions only
Constraint at this position
Conservation	phyloP -0.029	GERP -1.9, phastCons 0.48

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

Population frequency

dbSNP / gnomAD

No gnomAD frequency available for this variant. 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.Thr442fs
Coding: c.1324dup
MANE Select: NM_000098
dbSNP: rs1131691330
Type: Duplication
Location: chr1:53210997 (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

Also linked: carnitine palmitoyl transferase II deficiency, severe infantile form encephalopathy, acute, infection-induced, susceptibility to, 4

For Carnitine palmitoyltransferase II deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: All ages

Similar variants

CPT2 p.Thr442= Likely benign ★ same residue
CPT2 p.Arg303fs Pathogenic/Likely pathogenic ★★ same condition
CPT2 p.Asn349fs Pathogenic/Likely pathogenic ★★ same condition
CPT2 p.Asp279fs Pathogenic/Likely pathogenic ★★ same condition
CPT2 p.His242fs Likely pathogenic ★★ same condition
CPT2 p.Lys537fs Pathogenic/Likely pathogenic ★★ same condition
CPT2 p.Pro211fs Pathogenic/Likely pathogenic ★★ same condition
CPT2 p.Val466fs 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-thr442fs (accessed [today's date]).

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