1-53210045-G-T

Variant names:

• chr1-53210045-G-T
• rs1131691925
• NM_000098.3:c.371G>T

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Strong

The NM_000098.3(CPT2):​c.371G>T​(p.Arg124Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000066 in 151,476 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R124P) has been classified as Likely pathogenic.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: CPT2 NM_000098.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.60

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 Pathogenic. Variant got 10 ACMG points.

• PM1: In a topological_domain Mitochondrial matrix (size 152) in uniprot entity CPT2_HUMAN there are 20 pathogenic changes around while only 5 benign (80%) in NM_000098.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr1-53210045-G-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 430363.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=2, Uncertain_significance=1}.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.946

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CPT2	NM_000098.3	c.371G>T	p.Arg124Leu	missense_variant	Exon 4 of 5	ENST00000371486.4	NP_000089.1
CPT2	NM_001330589.2	c.371G>T	p.Arg124Leu	missense_variant	Exon 4 of 5		NP_001317518.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CPT2	ENST00000371486.4	c.371G>T	p.Arg124Leu	missense_variant	Exon 4 of 5	1	NM_000098.3	ENSP00000360541.3

Frequencies

GnomAD3 genomes AF: 0.00000660 AC: 1 AN: 151476 Hom.: 0 Cov.: 32

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome AF: 0.00000660 AC: 1 AN: 151476 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 73938

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: 0.0000147

Gnomad4 OTH AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.52	D
BayesDel_noAF	Pathogenic	0.51
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.81	D;.;.;T;T
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;D;D;D;D
M_CAP	Pathogenic	0.62	D
MetaRNN	Pathogenic	0.95	D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.3	H;.;.;.;.
PrimateAI	Uncertain	0.54	T
PROVEAN	Pathogenic	-6.6	D;.;.;.;.
REVEL	Pathogenic	0.98
Sift	Pathogenic	0.0	D;.;.;.;.
Sift4G	Uncertain	0.0030	D;.;.;.;.
Polyphen		1.0	D;.;.;.;.
Vest4		0.95
MutPred		0.73		Loss of catalytic residue at R124 (P = 0.0833);Loss of catalytic residue at R124 (P = 0.0833);Loss of catalytic residue at R124 (P = 0.0833);Loss of catalytic residue at R124 (P = 0.0833);Loss of catalytic residue at R124 (P = 0.0833);
MVP		1.0
MPC		0.62
ClinPred		1.0	D
GERP RS		5.7
Varity_R		0.96
gMVP		0.89

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1131691925; hg19: chr1-53675717;