NM_005502.4:c.67-6909C>T

Variant names:

• chr9-104896104-G-A
• rs2740491
• NM_005502.4:c.67-6909C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_005502.4(ABCA1):​c.67-6909C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.467 in 152,054 control chromosomes in the GnomAD database, including 18,735 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.47 (18735 hom., cov: 32)
• Consequence: ABCA1 NM_005502.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.274
• Publications: 5 publications found

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 Gene-Disease associations (from GenCC):

• hypoalphalipoproteinemia, primary, 1

  Inheritance: AD Classification: DEFINITIVE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Tangier disease

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet
• apolipoprotein A-I deficiency

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.99).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.714 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCA1	NM_005502.4	c.67-6909C>T		intron_variant	Intron 2 of 49	ENST00000374736.8	NP_005493.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCA1	ENST00000374736.8	c.67-6909C>T		intron_variant	Intron 2 of 49	1	NM_005502.4	ENSP00000363868.3
ABCA1	ENST00000678995.1	c.67-6909C>T		intron_variant	Intron 2 of 49			ENSP00000504612.1
ABCA1	ENST00000423487.6	c.67-6909C>T		intron_variant	Intron 2 of 7	2		ENSP00000416623.2
ABCA1	ENST00000374733.1	c.-114-6909C>T		intron_variant	Intron 1 of 4	2		ENSP00000363865.1

Frequencies

GnomAD3 genomes AF: 0.467 AC: 70952 AN: 151936 Hom.: 18709 Cov.: 32

Gnomad AFR AF: 0.721

Gnomad AMI AF: 0.491

Gnomad AMR AF: 0.366

Gnomad ASJ AF: 0.456

Gnomad EAS AF: 0.315

Gnomad SAS AF: 0.524

Gnomad FIN AF: 0.282

Gnomad MID AF: 0.516

Gnomad NFE AF: 0.372

Gnomad OTH AF: 0.464

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.467 AC: 71033 AN: 152054 Hom.: 18735 Cov.: 32 AF XY: 0.459 AC XY: 34131 AN XY: 74328

African (AFR) AF: 0.721 AC: 29902 AN: 41474

American (AMR) AF: 0.365 AC: 5578 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.456 AC: 1582 AN: 3470

East Asian (EAS) AF: 0.315 AC: 1625 AN: 5158

South Asian (SAS) AF: 0.523 AC: 2517 AN: 4814

European-Finnish (FIN) AF: 0.282 AC: 2979 AN: 10574

Middle Eastern (MID) AF: 0.524 AC: 154 AN: 294

European-Non Finnish (NFE) AF: 0.372 AC: 25266 AN: 67976

Other (OTH) AF: 0.467 AC: 984 AN: 2108

Alfa AF: 0.523 Hom.: 5018

Bravo AF: 0.481

Asia WGS AF: 0.465 AC: 1615 AN: 3476

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.99
CADD	Benign	1.1
DANN	Benign	0.40
PhyloP100		-0.27
Mutation Taster		=100/0	polymorphism (auto)

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: rs2740491; hg19: chr9-107658385; COSMIC: COSV66058092;