rs28936673

Positions:

• chr1-53213501-A-C

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2 PP3_Strong PP5_Very_Strong

The NM_000098.3(CPT2):​c.1883A>C​(p.Tyr628Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CPT2 NM_000098.3 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6 O:1
• Conservation: PhyloP100: 9.24

Genes affected

CPT2 (HGNC:2330): (carnitine palmitoyltransferase 2) The protein encoded by this gene is a nuclear protein which is transported to the mitochondrial inner membrane. Together with carnitine palmitoyltransferase I, the encoded protein oxidizes long-chain fatty acids in the mitochondria. Defects in this gene are associated with mitochondrial long-chain fatty-acid (LCFA) oxidation disorders. [provided by RefSeq, Jul 2008]

(HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.982
• PP5: Variant 1-53213501-A-C is Pathogenic according to our data. Variant chr1-53213501-A-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 8956.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CPT2	NM_000098.3	c.1883A>C	p.Tyr628Ser	missense_variant	5/5	ENST00000371486.4	NP_000089.1
CPT2	NM_001330589.2	c.1814A>C	p.Tyr605Ser	missense_variant	5/5		NP_001317518.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CPT2	ENST00000371486.4	c.1883A>C	p.Tyr628Ser	missense_variant	5/5	1	NM_000098.3	ENSP00000360541	P1
	ENST00000629810.1			upstream_gene_variant		5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Carnitine palmitoyl transferase II deficiency, severe infantile form Pathogenic:5

Likely pathogenic, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Apr 11, 2023	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Jul 01, 1999	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Apr 25, 2017	- -
Pathogenic, criteria provided, single submitter	clinical testing	3billion	-	The variant is not observed in the gnomAD v2.1.1 dataset. Protein truncation variants are a common disease-causing mechanism. Functional studies provide strong evidence of the variant having a damaging effect on the gene or gene product (PMID: 8651281). In silico tool predictions suggest damaging effect of the variant on gene or gene product (REVEL: 0.93). Same nucleotide change resulting in same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000008956 / PMID: 8651281). The variant has been reported to be in trans with a pathogenic variant as either compound heterozygous or homozygous in at least one similarly affected unrelated individual (PMID: 20661589, 8651281). Therefore, this variant is classified as Pathogenic according to the recommendation of ACMG/AMP guideline. -
Pathogenic, criteria provided, single submitter	clinical testing	Mendelics	May 28, 2019	- -

Carnitine palmitoyl transferase II deficiency, myopathic form Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jul 01, 1999

- -

Carnitine palmitoyltransferase II deficiency Other:1

not provided, no classification provided

literature only

GeneReviews

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.36
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.52
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.68	D;.;T;T;T
Eigen	Pathogenic	0.84
Eigen_PC	Pathogenic	0.83
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Benign	0.85	D;T;D;D;T
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.98	D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.6	M;.;.;.;.
MutationTaster	Benign	1.0	A
PrimateAI	Uncertain	0.54	T
PROVEAN	Pathogenic	-6.8	D;.;.;.;.
REVEL	Pathogenic	0.93
Sift	Benign	0.037	D;.;.;.;.
Sift4G	Uncertain	0.042	D;.;.;.;.
Polyphen		1.0	D;.;.;.;.
Vest4		0.90
MutPred		0.86		Gain of disorder (P = 0.0039);.;.;.;.;
MVP		0.99
MPC		0.65
ClinPred		0.99	D
GERP RS		5.9
Varity_R		0.89
gMVP		0.82

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs28936673; hg19: chr1-53679173;