NM_000098.3:c.1598T>C

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_000098.3(CPT2):c.1598T>C(p.Val533Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000403 in 1,611,954 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. V533V) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0021 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00022 ( 0 hom. )

Consequence

CPT2
NM_000098.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:5

Conservation

PhyloP100: 0.188

Publications

2 publications found

Variant links:

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]

CPT2 Gene-Disease associations (from GenCC):

carnitine palmitoyltransferase II deficiency
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen, Myriad Women’s Health
carnitine palmitoyl transferase II deficiency, myopathic form
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, PanelApp Australia
carnitine palmitoyl transferase II deficiency, neonatal form
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), PanelApp Australia
carnitine palmitoyl transferase II deficiency, severe infantile form
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Orphanet
encephalopathy, acute, infection-induced, susceptibility to, 4
Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

CPT2 links:

ENSG00000236723 (HGNC:):

ENSG00000236723 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009387672).

BP6

Variant 1-53211272-T-C is Benign according to our data. Variant chr1-53211272-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 203657.We mark this variant Likely_benign, oryginal submission is: [Conflicting_classifications_of_pathogenicity].

BS2

High Homozygotes in GnomAd4 at 2 AR,Unknown gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CPT2	NM_000098.3 link	c.1598T>C	p.Val533Ala	missense_variant	Exon 4 of 5	ENST00000371486.4	NP_000089.1	P23786A0A140VK13
CPT2	NM_001330589.2 link	c.1576+22T>C		intron_variant	Intron 4 of 4		NP_001317518.1	A0A1B0GTB8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CPT2	ENST00000371486.4 link	c.1598T>C	p.Val533Ala	missense_variant	Exon 4 of 5	1	NM_000098.3	ENSP00000360541.3		P23786

Frequencies

GnomAD3 genomes

AF:

0.00215

AC:

327

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00734

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00105

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00287

GnomAD2 exomes

AF:

0.000477

AC:

117

AN:

245266

AF XY:

0.000324

show subpopulations

Gnomad AFR exome

AF:

0.00665

Gnomad AMR exome

AF:

0.000322

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000333

GnomAD4 exome

AF:

0.000221

AC:

323

AN:

1459684

Hom.:

Cov.:

AF XY:

0.000179

AC XY:

130

AN XY:

725938

show subpopulations

African (AFR)

AF:

0.00796

AC:

266

AN:

33418

American (AMR)

AF:

0.000405

AC:

AN:

44456

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26084

East Asian (EAS)

AF:

0.00

AC:

AN:

39604

South Asian (SAS)

AF:

0.00

AC:

AN:

85754

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53270

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.0000171

AC:

AN:

1111028

Other (OTH)

AF:

0.000298

AC:

AN:

60306

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

105

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00215

AC:

327

AN:

152270

Hom.:

Cov.:

AF XY:

0.00216

AC XY:

161

AN XY:

74456

show subpopulations

African (AFR)

AF:

0.00732

AC:

304

AN:

41554

American (AMR)

AF:

0.00105

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68010

Other (OTH)

AF:

0.00284

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.514

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000474

Hom.:

Bravo

AF:

0.00252

ESP6500AA

AF:

0.00817

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000577

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:1

Mar 03, 2022

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: CPT2 c.1598T>C (p.Val533Ala) results in a non-conservative amino acid change located in the Choline/carnitine acyltransferase domain (IPR039551) of the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00048 in 245266 control chromosomes (gnomAD). This frequency is not higher than expected for a pathogenic variant in CPT2 causing Carnitine Palmitoyltransferase II Deficiency (0.00048 vs 0.0016), allowing no conclusion about variant significance. To our knowledge, no occurrence of c.1598T>C in individuals affected with Carnitine Palmitoyltransferase II Deficiency and no experimental evidence demonstrating its impact on protein function have been reported. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 and classified the variant as benign (n=1) and likely benign (n=1). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Sep 11, 2014

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

not provided

Benign:2

Jun 26, 2019

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sep 21, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

CPT2-related disorder

Benign:1

May 03, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Carnitine palmitoyltransferase II deficiency

Benign:1

Jan 31, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.049

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.40

CADD

Benign

1.1

(source)

DANN

Benign

0.55

DEOGEN2

Benign

0.28

T;.;T

Eigen

Benign

-1.7

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.060

LIST_S2

Benign

0.13

T;T;T

M_CAP

Benign

0.030

MetaRNN

Benign

0.0094

T;T;T

MetaSVM

Benign

-0.80

MutationAssessor

Benign

0.14

N;.;.

PhyloP100

0.19

PrimateAI

Benign

0.30

PROVEAN

Benign

0.65

N;.;.

REVEL

Benign

0.17

Sift

Benign

0.78

T;.;.

Sift4G

Benign

0.84

T;.;.

Polyphen

0.0

B;.;.

Vest4

0.081

MVP

0.92

MPC

0.14

ClinPred

0.0015

GERP RS

-0.20

Varity_R

0.036

gMVP

0.20

Mutation Taster

=95/5

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over