rs74315293

Variant names:

• chr1-53213509-C-T
• rs74315293
• NM_000098.3:c.1891C>T

Your query was ambiguous. Multiple possible variants found:

• chr1-53213509-C-T
• chr1-53213509-C-G

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PS3 PP3_Strong PP5_Very_Strong

The NM_000098.3(CPT2):​c.1891C>T​(p.Arg631Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000204 in 1,614,116 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 Pathogenic (★★). ClinVar reports functional evidence for this variant: "SCV002513152: Published functional studies demonstrate a damaging effect (significant reduction of enzyme activity compared to wildtype) (Taroni et al., 1992)" and additional evidence is available in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R631H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000021 (0 hom.)
• Consequence: CPT2 NM_000098.3 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:9 O:1
• Conservation: PhyloP100: 4.89
• Publications: 21 publications found

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: Myriad Women’s Health, ClinGen
• carnitine palmitoyl transferase II deficiency, neonatal form

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
• carnitine palmitoyl transferase II deficiency, myopathic form

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• carnitine palmitoyl transferase II deficiency, severe infantile form

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• encephalopathy, acute, infection-induced, susceptibility to, 4

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ENSG00000236723 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 16 ACMG points.

• PS3: PS3 evidence extracted from ClinVar submissions: SCV002513152: Published functional studies demonstrate a damaging effect (significant reduction of enzyme activity compared to wildtype) (Taroni et al., 1992); PMID: 9600456
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.968
• PP5: Variant 1-53213509-C-T is Pathogenic according to our data. Variant chr1-53213509-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 8952.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000098.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CPT2	NM_000098.3	MANE Select	c.1891C>T	p.Arg631Cys	missense	Exon 5 of 5	NP_000089.1	P23786
	CPT2	NM_001330589.2		c.1822C>T	p.Arg608Cys	missense	Exon 5 of 5	NP_001317518.1	A0A1B0GTB8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CPT2	ENST00000371486.4	TSL:1 MANE Select	c.1891C>T	p.Arg631Cys	missense	Exon 5 of 5	ENSP00000360541.3	P23786
	CPT2	ENST00000873097.1		c.1957C>T	p.Arg653Cys	missense	Exon 6 of 6	ENSP00000543156.1
	CPT2	ENST00000637252.1	TSL:5	c.1927C>T	p.Arg643Cys	missense	Exon 6 of 6	ENSP00000490492.1	A0A1B0GVF3

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152232 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000385

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

GnomAD2 exomes AF: 0.0000239 AC: 6 AN: 251402 AF XY: 0.0000221

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000205 AC: 30 AN: 1461884 Hom.: 0 Cov.: 31 AF XY: 0.0000248 AC XY: 18 AN XY: 727244

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.000252 AC: 10 AN: 39700

South Asian (SAS) AF: 0.000174 AC: 15 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1112004

Other (OTH) AF: 0.0000166 AC: 1 AN: 60394

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152232 Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1 AN XY: 74366

African (AFR) AF: 0.00 AC: 0 AN: 41464

American (AMR) AF: 0.00 AC: 0 AN: 15284

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.000385 AC: 2 AN: 5196

South Asian (SAS) AF: 0.00 AC: 0 AN: 4834

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68042

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.0000140 Hom.: 0

Bravo AF: 0.0000227

ExAC AF: 0.0000247 AC: 3

EpiCase AF: 0.000164

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
2	-	-	Carnitine palmitoyl transferase II deficiency, severe infantile form (2)
2	-	-	Carnitine palmitoyltransferase II deficiency (3)
2	-	-	not provided (2)
1	-	-	Carnitine palmitoyl transferase II deficiency, myopathic form (1)
1	-	-	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 (1)
1	-	-	Encephalopathy, acute, infection-induced, susceptibility to, 4 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.40
CADD	Pathogenic	30
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.78	D
Eigen	Pathogenic	0.86
Eigen_PC	Pathogenic	0.83
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.95	D
M_CAP	Uncertain	0.13	D
MetaRNN	Pathogenic	0.97	D
MetaSVM	Uncertain	0.77	D
MutationAssessor	Pathogenic	3.1	M
PhyloP100		4.9
PrimateAI	Benign	0.42	T
PROVEAN	Uncertain	-3.9	D
REVEL	Pathogenic	0.83
Sift	Uncertain	0.0040	D
Sift4G	Uncertain	0.011	D
Polyphen		1.0	D
Vest4		0.87
MutPred		0.88		Loss of disorder (P = 0.0429)
MVP		0.96
MPC		0.26
ClinPred		0.88	D
GERP RS		5.9
Varity_R		0.42
gMVP		0.73
Mutation Taster		=22/78	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs74315293; hg19: chr1-53679181; COSMIC: COSV53760198; COSMIC: COSV53760198;