NM_005502.4:c.4037G>A

Variant names:

Variant summary

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

The NM_005502.4(ABCA1):c.4037G>A(p.Gly1346Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000589 in 1,614,060 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000058 ( 0 hom. )

Consequence

ABCA1
NM_005502.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:3B:1

Conservation

PhyloP100: 7.54

Variant links:

Genes affected

ABCA1 (HGNC:29): (ATP binding cassette subfamily A member 1) The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intracellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the ABC1 subfamily. Members of the ABC1 subfamily comprise the only major ABC subfamily found exclusively in multicellular eukaryotes. With cholesterol as its substrate, this protein functions as a cholesteral efflux pump in the cellular lipid removal pathway. Mutations in both alleles of this gene cause Tangier disease and familial high-density lipoprotein (HDL) deficiency. [provided by RefSeq, Sep 2019]

ABCA1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCA1	NM_005502.4 link	c.4037G>A	p.Gly1346Glu	missense_variant	Exon 28 of 50	ENST00000374736.8	NP_005493.2	O95477B7XCW9B2RUU2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCA1	ENST00000374736.8 link	c.4037G>A	p.Gly1346Glu	missense_variant	Exon 28 of 50	1	NM_005502.4	ENSP00000363868.3		O95477
ABCA1	ENST00000678995.1 link	c.4043G>A	p.Gly1348Glu	missense_variant	Exon 28 of 50			ENSP00000504612.1		A0A7I2V5U0

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00230

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000959

GnomAD3 exomes

AF:

0.000115

AC:

AN:

251466

Hom.:

AF XY:

0.000110

AC XY:

AN XY:

135906

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00228

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.0000581

AC:

AN:

1461880

Hom.:

Cov.:

AF XY:

0.0000564

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00237

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000809

Gnomad4 OTH exome

AF:

0.000199

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152180

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00230

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000959

Alfa

AF:

0.000280

Hom.:

Bravo

AF:

0.0000945

ExAC

AF:

0.0000988

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:3Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:1

Dec 12, 2019

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Reported as likely pathogenic by another clinical laboratory in ClinVar but additional evidence is not available (ClinVar Variant ID#521460; Landrum et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 30333156, 32041611, 31589614) -

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 17, 2019

Mayo Clinic Laboratories, Mayo Clinic

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiovascular phenotype

Pathogenic:1

Jul 17, 2024

Ambry Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.G1346E variant (also known as c.4037G>A), located in coding exon 27 of the ABCA1 gene, results from a G to A substitution at nucleotide position 4037. The glycine at codon 1346 is replaced by glutamic acid, an amino acid with similar properties. This variant has been reported in a subject with Tangier disease who was also noted to be compound heterozygous with the c.4175+1G>T alteration and has been reported in a cohort of subjects with features of Tangier disease (Peloso GM et al. Eur J Hum Genet, 2016 Jun;24:924-30; Geller AS et al. J Lipid Res, 2018 Dec;59:2421-2435). This variant has been identified in the homozygous state, but clinical details were limited (Ambry internal data). This variant does not appear to be associated with disease in a heterozygous state. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the majority of available evidence to date, this variant is likely to be pathogenic. -

Tangier disease;C5231558:Hypoalphalipoproteinemia, primary, 1

Uncertain:1

Nov 16, 2022

New York Genome Center

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.4037G>A variant has previously been reported as a variant of uncertain significance in a study performed on a cohort of dyslipidemia patients [PMID:32041611]. However, the disease phenotype and the number of affected individuals with this variant have not been specified in the study [PMID:32041611]. This variant has also been reported as a compound heterozygous or heterozygous state in individuals with HDL deficiency [PMID: 30333156, 35460704]. This variant has been deposited in ClinVar [ClinVar ID: 521460] as Likely Pathogenic, Variant of Uncertain Significance, and Likely Benign. The c.4037G>A variant is observed in 58 alleles (0.0098%minor allele frequency with 0 homozygotes) in population databases (gnomAD v2.1.1 and v3.1.2, TOPMed Freeze 8) suggesting it is not a common benign variant in the populations represented in those databases. The c.4037G>A variant is located in exon 28 of this 50-exon gene and is predicted to replace an evolutionarily conserved glycine amino acid with glutamic acid at position 1346 in the intracellular helices 3 of the encoded protein [PMID: 35460704]. In silico predictions are in favor of damaging effect for p.(Gly1346Glu) the variant [(CADD v1.6 = 27.9, REVEL = 0.833)]; however, there are no functional studies to support or refute these predictions. Based on available evidence this c.4037G>A p.(Gly1346Glu) variant identified in ABCA1 is classified as a Variant of UncertainSignificance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.95

BayesDel_addAF

Pathogenic

0.44

BayesDel_noAF

Pathogenic

0.45

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.74

Eigen

Pathogenic

0.96

Eigen_PC

Pathogenic

0.93

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.97

M_CAP

Pathogenic

0.42

MetaRNN

Uncertain

0.63

MetaSVM

Pathogenic

0.99

MutationAssessor

Pathogenic

3.3

PrimateAI

Pathogenic

0.89

PROVEAN

Uncertain

-3.3

REVEL

Pathogenic

0.83

Sift

Uncertain

0.0040

Sift4G

Uncertain

0.0090

Polyphen

1.0

Vest4

0.97

MutPred

0.47

Loss of MoRF binding (P = 0.043);

MVP

0.99

MPC

1.3

ClinPred

0.95

GERP RS

5.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.81

gMVP

0.89

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

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