chr11-68804038-G-A

Variant names:

• chr11-68804038-G-A
• rs774388890
• NM_001876.4:c.517C>T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001876.4(CPT1A):​c.517C>T​(p.Arg173Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000192 in 1,613,972 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R173H) has been classified as Benign.

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000018 (0 hom.)
• Consequence: CPT1A NM_001876.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 4.47
• Publications: 1 publications found

Genes affected

CPT1A (HGNC:2328): (carnitine palmitoyltransferase 1A) The mitochondrial oxidation of long-chain fatty acids is initiated by the sequential action of carnitine palmitoyltransferase I (which is located in the outer membrane and is detergent-labile) and carnitine palmitoyltransferase II (which is located in the inner membrane and is detergent-stable), together with a carnitine-acylcarnitine translocase. CPT I is the key enzyme in the carnitine-dependent transport across the mitochondrial inner membrane and its deficiency results in a decreased rate of fatty acid beta-oxidation. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

CPT1A Gene-Disease associations (from GenCC):

• carnitine palmitoyl transferase 1A deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.84

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001876.4. 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
	CPT1A	NM_001876.4	MANE Select	c.517C>T	p.Arg173Cys	missense	Exon 5 of 19	NP_001867.2	P50416-1
	CPT1A	NM_001440358.1		c.517C>T	p.Arg173Cys	missense	Exon 5 of 19	NP_001427287.1
	CPT1A	NM_001440359.1		c.517C>T	p.Arg173Cys	missense	Exon 6 of 20	NP_001427288.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CPT1A	ENST00000265641.10	TSL:1 MANE Select	c.517C>T	p.Arg173Cys	missense	Exon 5 of 19	ENSP00000265641.4	P50416-1
	CPT1A	ENST00000376618.6	TSL:1	c.517C>T	p.Arg173Cys	missense	Exon 5 of 19	ENSP00000365803.2	P50416-2
	CPT1A	ENST00000540367.5	TSL:1	c.517C>T	p.Arg173Cys	missense	Exon 4 of 18	ENSP00000439084.1	P50416-2

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152172 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000196

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: 0.0000294

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000239 AC: 6 AN: 251478 AF XY: 0.0000294

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000867

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000178 AC: 26 AN: 1461800 Hom.: 0 Cov.: 30 AF XY: 0.0000193 AC XY: 14 AN XY: 727190

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.000112 AC: 5 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.0000580 AC: 5 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

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

European-Non Finnish (NFE) AF: 0.0000135 AC: 15 AN: 1111938

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

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 152172 Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3 AN XY: 74354

African (AFR) AF: 0.00 AC: 0 AN: 41434

American (AMR) AF: 0.000196 AC: 3 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10616

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

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68036

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000416

ExAC AF: 0.0000330 AC: 4

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	2	-	Carnitine palmitoyl transferase 1A deficiency (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.40
CADD	Pathogenic	30
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.93	D
Eigen	Uncertain	0.38
Eigen_PC	Uncertain	0.30
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.95	D
M_CAP	Uncertain	0.25	D
MetaRNN	Pathogenic	0.84	D
MetaSVM	Pathogenic	0.86	D
MutationAssessor	Pathogenic	3.2	M
PhyloP100		4.5
PrimateAI	Uncertain	0.59	T
PROVEAN	Pathogenic	-5.2	D
REVEL	Pathogenic	0.77
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.034	D
Polyphen		0.67	P
Vest4		0.79
MutPred		0.55		Gain of catalytic residue at P172 (P = 0.0073)
MVP		0.98
MPC		1.2
ClinPred		0.97	D
GERP RS		4.2
Varity_R		0.61
gMVP		0.78
Mutation Taster		=65/35	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs774388890; hg19: chr11-68571506;