1-53211252-T-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_StrongBP6_Very_StrongBP7BS2

The NM_000098.3(CPT2):c.1578T>C(p.Gly526Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00398 in 1,612,504 control chromosomes in the GnomAD database, including 40 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0043 ( 4 hom., cov: 32)

Exomes 𝑓: 0.0039 ( 36 hom. )

Consequence

CPT2
NM_000098.3 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:14

Conservation

PhyloP100: -2.08

Publications

0 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 -17 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.89).

BP6

Variant 1-53211252-T-C is Benign according to our data. Variant chr1-53211252-T-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 297609.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.08 with no splicing effect.

BS2

High Homozygotes in GnomAd4 at 4 AR,Unknown gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CPT2	NM_000098.3 link	c.1578T>C	p.Gly526Gly	synonymous_variant	Exon 4 of 5	ENST00000371486.4	NP_000089.1	P23786A0A140VK13
CPT2	NM_001330589.2 link	c.1576+2T>C		splice_donor_variant, 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.1578T>C	p.Gly526Gly	synonymous_variant	Exon 4 of 5	1	NM_000098.3	ENSP00000360541.3		P23786

Frequencies

GnomAD3 genomes

AF:

0.00432

AC:

658

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000700

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00275

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0275

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00422

Gnomad OTH

AF:

0.00240

GnomAD2 exomes

AF:

0.00422

AC:

1044

AN:

247360

AF XY:

0.00411

show subpopulations

Gnomad AFR exome

AF:

0.00101

Gnomad AMR exome

AF:

0.000525

Gnomad ASJ exome

AF:

0.000100

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0248

Gnomad NFE exome

AF:

0.00404

Gnomad OTH exome

AF:

0.00314

GnomAD4 exome

AF:

0.00394

AC:

5756

AN:

1460246

Hom.:

Cov.:

AF XY:

0.00379

AC XY:

2749

AN XY:

726244

show subpopulations

African (AFR)

AF:

0.000688

AC:

AN:

33442

American (AMR)

AF:

0.000561

AC:

AN:

44552

Ashkenazi Jewish (ASJ)

AF:

0.000153

AC:

AN:

26084

East Asian (EAS)

AF:

0.00

AC:

AN:

39640

South Asian (SAS)

AF:

0.000280

AC:

AN:

85852

European-Finnish (FIN)

AF:

0.0250

AC:

1331

AN:

53320

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00367

AC:

4080

AN:

1111262

Other (OTH)

AF:

0.00444

AC:

268

AN:

60326

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

340

680

1020

1360

1700

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

150

300

450

600

750

<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:

0.00432

AC:

658

AN:

152258

Hom.:

Cov.:

AF XY:

0.00545

AC XY:

406

AN XY:

74446

show subpopulations

African (AFR)

AF:

0.000698

AC:

AN:

41556

American (AMR)

AF:

0.00274

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.000576

AC:

AN:

3470

East Asian (EAS)

AF:

0.000193

AC:

AN:

5176

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.0275

AC:

292

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00422

AC:

287

AN:

68016

Other (OTH)

AF:

0.00237

AC:

AN:

2106

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

100

134

167

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00301

Hom.:

Bravo

AF:

0.00223

TwinsUK

AF:

0.00270

AC:

ALSPAC

AF:

0.00389

AC:

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.00489

AC:

ExAC

AF:

0.00392

AC:

476

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:14

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Sep 15, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jun 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

CPT2: BS2 -

Carnitine palmitoyltransferase II deficiency

Benign:3

Sep 16, 2020

Natera, Inc.

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Feb 02, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

not specified

Benign:2

May 26, 2022

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

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 17, 2017

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. -

Carnitine palmitoyl transferase II deficiency, myopathic form;C1833511:Carnitine palmitoyl transferase II deficiency, severe infantile form;C1833518:Carnitine palmitoyl transferase II deficiency, neonatal form;C3280160:Encephalopathy, acute, infection-induced, susceptibility to, 4

Benign:1

Aug 12, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Carnitine palmitoyl transferase II deficiency, neonatal form

Benign:1

Apr 11, 2023

Genome-Nilou Lab

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Carnitine palmitoyl transferase II deficiency, myopathic form

Benign:1

Apr 11, 2023

Genome-Nilou Lab

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Encephalopathy, acute, infection-induced, susceptibility to, 4

Benign:1

Apr 11, 2023

Genome-Nilou Lab

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Carnitine palmitoyl transferase II deficiency, severe infantile form

Benign:1

Apr 11, 2023

Genome-Nilou Lab

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.89

CADD

Benign

0.72

(source)

DANN

Benign

0.49

FATHMM_MKL

Benign

0.048

PhyloP100

-2.1

GERP RS

-5.6

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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