rs774388890

Positions:

chr11-68804038-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The ENST00000265641.10(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
ENST00000265641.10 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:2

Conservation

PhyloP100: 4.47

Variant links:

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.84

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CPT1A	NM_001876.4 linkuse as main transcript	c.517C>T	p.Arg173Cys	missense_variant	5/19	ENST00000265641.10	NP_001867.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CPT1A	ENST00000265641.10 linkuse as main transcript	c.517C>T	p.Arg173Cys	missense_variant	5/19	1	NM_001876.4	ENSP00000265641	P1	P50416-1
CPT1A	ENST00000376618.6 linkuse as main transcript	c.517C>T	p.Arg173Cys	missense_variant	5/19	1		ENSP00000365803		P50416-2
CPT1A	ENST00000540367.5 linkuse as main transcript	c.517C>T	p.Arg173Cys	missense_variant	4/18	1		ENSP00000439084		P50416-2
CPT1A	ENST00000539743.5 linkuse as main transcript	c.517C>T	p.Arg173Cys	missense_variant	4/18	5		ENSP00000446108	P1	P50416-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

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

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251478

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

135920

show subpopulations

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 SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000178

AC:

AN:

1461800

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

727190

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000135

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152172

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74354

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000416

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Carnitine palmitoyl transferase 1A deficiency

Uncertain:2

Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Apr 16, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	May 29, 2022	This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 173 of the CPT1A protein (p.Arg173Cys). This variant is present in population databases (rs774388890, gnomAD 0.009%). This variant has not been reported in the literature in individuals affected with CPT1A-related conditions. ClinVar contains an entry for this variant (Variation ID: 463967). 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 C15"). 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

0.14

BayesDel_addAF

Pathogenic

0.30

BayesDel_noAF

Pathogenic

0.40

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.93

.;.;D;D

Eigen

Uncertain

0.38

Eigen_PC

Uncertain

0.30

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.95

.;D;.;D

M_CAP

Uncertain

0.25

MetaRNN

Pathogenic

0.84

D;D;D;D

MetaSVM

Pathogenic

0.86

MutationAssessor

Pathogenic

3.2

M;M;M;M

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.59

PROVEAN

Pathogenic

-5.2

D;D;D;D

REVEL

Pathogenic

0.77

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Uncertain

0.034

D;D;D;D

Polyphen

0.67

P;P;D;D

Vest4

0.79

MutPred

0.55

Gain of catalytic residue at P172 (P = 0.0073);Gain of catalytic residue at P172 (P = 0.0073);Gain of catalytic residue at P172 (P = 0.0073);Gain of catalytic residue at P172 (P = 0.0073);

MVP

0.98

MPC

1.2

ClinPred

0.97

GERP RS

4.2

Varity_R

0.61

gMVP

0.78

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over