NM_001199753.2:c.1541G>A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BS1_SupportingBS2

The NM_001199753.2(CPT1C):c.1541G>A(p.Arg514Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000605 in 1,613,024 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R514L) has been classified as Benign.

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 30)

Exomes 𝑓: 0.00064 ( 1 hom. )

Consequence

CPT1C
NM_001199753.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 3.03

Publications

8 publications found

Variant links:

Genes affected

CPT1C (HGNC:18540): (carnitine palmitoyltransferase 1C) This gene encodes a member of the carnitine/choline acetyltransferase family. The encoded protein regulates the beta-oxidation and transport of long-chain fatty acids into mitochondria, and may play a role in the regulation of feeding behavior and whole-body energy homeostasis. Alternatively spliced transcript variants encoding multiple protein isoforms have been observed for this gene. [provided by RefSeq, Dec 2010]

CPT1C Gene-Disease associations (from GenCC):

hereditary spastic paraplegia 73
Inheritance: AD Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
hereditary spastic paraplegia
Inheritance: AD Classification: LIMITED Submitted by: ClinGen

CPT1C links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BS1

Variant frequency is greater than expected in population nfe. GnomAdExome4 allele frequency = 0.000641 (936/1461020) while in subpopulation NFE AF = 0.000815 (906/1111400). AF 95% confidence interval is 0.000771. There are 1 homozygotes in GnomAdExome4. There are 458 alleles in the male GnomAdExome4 subpopulation. Median coverage is 30. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High AC in GnomAd4 at 40 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CPT1C	NM_001199753.2 link	c.1541G>A	p.Arg514Gln	missense_variant	Exon 14 of 20	ENST00000598293.6	NP_001186682.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CPT1C	ENST00000598293.6 link	c.1541G>A	p.Arg514Gln	missense_variant	Exon 14 of 20	2	NM_001199753.2	ENSP00000473028.1

Frequencies

GnomAD3 genomes

AF:

0.000263

AC:

AN:

151886

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.000515

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000267

AC:

AN:

250992

AF XY:

0.000280

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000546

Gnomad OTH exome

AF:

0.000654

GnomAD4 exome

AF:

0.000641

AC:

936

AN:

1461020

Hom.:

Cov.:

AF XY:

0.000630

AC XY:

458

AN XY:

726892

show subpopulations

African (AFR)

AF:

0.0000896

AC:

AN:

33466

American (AMR)

AF:

0.0000224

AC:

AN:

44706

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26124

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39686

South Asian (SAS)

AF:

0.00

AC:

AN:

86238

European-Finnish (FIN)

AF:

0.0000563

AC:

AN:

53270

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000815

AC:

906

AN:

1111400

Other (OTH)

AF:

0.000364

AC:

AN:

60362

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

Heterozygous variant carriers

128

170

213

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

126

168

210

<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:

0.000263

AC:

AN:

152004

Hom.:

Cov.:

AF XY:

0.000135

AC XY:

AN XY:

74332

show subpopulations

African (AFR)

AF:

0.000121

AC:

AN:

41444

American (AMR)

AF:

0.00

AC:

AN:

15248

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5166

South Asian (SAS)

AF:

0.00

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10588

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000515

AC:

AN:

67962

Other (OTH)

AF:

0.00

AC:

AN:

2106

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

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:

0.000414

Hom.:

Bravo

AF:

0.000257

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000198

AC:

EpiCase

AF:

0.000491

EpiControl

AF:

0.000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia

Uncertain:1

Nov 05, 2021

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:research

- -

Hereditary spastic paraplegia 73

Uncertain:1

Mar 17, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 503 of the CPT1C protein (p.Arg503Gln). This variant is present in population databases (rs150853576, gnomAD 0.05%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with CPT1C-related conditions. ClinVar contains an entry for this variant (Variation ID: 542767). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt CPT1C protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.096

BayesDel_noAF

Uncertain

-0.020

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.68

D;D;D;.;D

Eigen

Uncertain

0.52

Eigen_PC

Uncertain

0.46

FATHMM_MKL

Uncertain

0.90

LIST_S2

Pathogenic

1.0

.;.;D;D;D

M_CAP

Uncertain

0.18

MetaRNN

Uncertain

0.47

T;T;T;T;T

MetaSVM

Pathogenic

0.85

MutationAssessor

Uncertain

2.1

M;M;M;.;.

PhyloP100

3.0

PrimateAI

Benign

0.37

PROVEAN

Uncertain

-3.3

D;D;.;D;.

REVEL

Uncertain

0.58

Sift

Uncertain

0.0020

D;D;.;D;.

Sift4G

Uncertain

0.040

D;D;D;D;D

Polyphen

1.0

D;D;D;D;.

Vest4

0.43

MVP

0.92

MPC

1.3

ClinPred

0.54

GERP RS

4.4

Varity_R

0.34

gMVP

0.59

Mutation Taster

=93/7

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