rs763502641

Positions:

• chr1-53210468-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000098.3(CPT2):​c.794G>A​(p.Ser265Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,790 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. S265S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CPT2 NM_000098.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.428

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]

ENSG00000236723 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.069995135).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CPT2	NM_000098.3	c.794G>A	p.Ser265Asn	missense_variant	4/5	ENST00000371486.4	NP_000089.1
CPT2	NM_001330589.2	c.794G>A	p.Ser265Asn	missense_variant	4/5		NP_001317518.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CPT2	ENST00000371486.4	c.794G>A	p.Ser265Asn	missense_variant	4/5	1	NM_000098.3	ENSP00000360541.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250920 Hom.: 0 AF XY: 0.00000737 AC XY: 1 AN XY: 135706

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461790 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727202

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Carnitine palmitoyltransferase II deficiency Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 15, 2022

This sequence change replaces serine, which is neutral and polar, with asparagine, which is neutral and polar, at codon 265 of the CPT2 protein (p.Ser265Asn). This variant is present in population databases (rs763502641, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with CPT2-related conditions. ClinVar contains an entry for this variant (Variation ID: 571489). 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 CPT2 protein function. 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	0.076
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	9.7
DANN	Benign	0.93
DEOGEN2	Benign	0.33	T;.;.;T;T
Eigen	Benign	-0.91
Eigen_PC	Benign	-0.88
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.70	T;T;T;T;T
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.070	T;T;T;T;T
MetaSVM	Benign	-0.69	T
MutationAssessor	Benign	1.1	L;.;.;.;.
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-0.25	N;.;.;.;.
REVEL	Benign	0.092
Sift	Benign	0.28	T;.;.;.;.
Sift4G	Benign	0.44	T;.;.;.;.
Polyphen		0.0020	B;.;.;.;.
Vest4		0.089
MutPred		0.39		Loss of disorder (P = 0.1261);Loss of disorder (P = 0.1261);Loss of disorder (P = 0.1261);Loss of disorder (P = 0.1261);Loss of disorder (P = 0.1261);
MVP		0.94
MPC		0.11
ClinPred		0.048	T
GERP RS		-1.7
Varity_R		0.036
gMVP		0.42

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

LitVar

Other links and lift over

dbSNP: rs763502641; hg19: chr1-53676140;