19-49697341-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PP3_Moderate BS2

The NM_001199753.2(CPT1C):c.157G>A(p.Gly53Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000266 in 1,613,936 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000027 (0 hom.)
• Consequence: CPT1C NM_001199753.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.95

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]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.851
• BS2: High AC in GnomAdExome at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CPT1C	NM_001199753.2	c.157G>A	p.Gly53Ser	missense_variant	4/20	ENST00000598293.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CPT1C	ENST00000598293.6	c.157G>A	p.Gly53Ser	missense_variant	4/20	2	NM_001199753.2	P1

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152102 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

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: 0.0000588

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000239 AC: 6 AN: 251426 Hom.: 0 AF XY: 0.0000221 AC XY: 3 AN XY: 135874

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.0000267 AC: 39 AN: 1461834 Hom.: 0 Cov.: 31 AF XY: 0.0000261 AC XY: 19 AN XY: 727214

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000315

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152102 Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1 AN XY: 74284

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000340

TwinsUK AF: 0.000539 AC: 2

ALSPAC AF: 0.00 AC: 0

ExAC AF: 0.0000247 AC: 3

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary spastic paraplegia 73 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Aug 04, 2021

Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with CPT1C-related conditions. This variant is present in population databases (rs374236576, ExAC 0.004%). This sequence change replaces glycine with serine at codon 53 of the CPT1C protein (p.Gly53Ser). The glycine residue is highly conserved and there is a small physicochemical difference between glycine and serine. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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	0.15
BayesDel_addAF	Uncertain	0.067	T
BayesDel_noAF	Uncertain	-0.050
Cadd	Pathogenic	32
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.47	T;T;T;T;.;.;T;.
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Pathogenic	0.97	D
M_CAP	Pathogenic	0.37	D
MetaRNN	Pathogenic	0.85	D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.57	D
MutationAssessor	Benign	2.0	M;M;.;M;M;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Benign	0.46	T
PROVEAN	Pathogenic	-5.0	D;D;.;.;D;.;.;.
REVEL	Pathogenic	0.66
Sift	Benign	0.065	T;T;.;.;T;.;.;.
Sift4G	Benign	0.065	T;T;D;T;T;D;T;T
Polyphen		0.99	D;D;.;D;D;.;.;.
Vest4		0.60
MutPred		0.69		Loss of catalytic residue at G53 (P = 0.0588);Loss of catalytic residue at G53 (P = 0.0588);Loss of catalytic residue at G53 (P = 0.0588);Loss of catalytic residue at G53 (P = 0.0588);Loss of catalytic residue at G53 (P = 0.0588);Loss of catalytic residue at G53 (P = 0.0588);Loss of catalytic residue at G53 (P = 0.0588);Loss of catalytic residue at G53 (P = 0.0588);
MVP		0.93
MPC		1.1
ClinPred		0.88	D
GERP RS		3.9
Varity_R		0.42
gMVP		0.88

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs374236576; hg19: chr19-50200598; COSMIC: COSV54918720; COSMIC: COSV54918720;