rs2777804

Positions:

• chr9-104808960-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_005502.4(ABCA1):​c.4274+506G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.497 in 152,182 control chromosomes in the GnomAD database, including 23,403 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 0.50 (23403 hom., cov: 34)
• Consequence: ABCA1 NM_005502.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.548

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.672 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABCA1	NM_005502.4	c.4274+506G>A		intron_variant		ENST00000374736.8	NP_005493.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABCA1	ENST00000374736.8	c.4274+506G>A		intron_variant		1	NM_005502.4	ENSP00000363868.3
ABCA1	ENST00000678995.1	c.4280+506G>A		intron_variant				ENSP00000504612.1

Frequencies

GnomAD3 genomes AF: 0.497 AC: 75648 AN: 152062 Hom.: 23398 Cov.: 34

Gnomad AFR AF: 0.126

Gnomad AMI AF: 0.703

Gnomad AMR AF: 0.518

Gnomad ASJ AF: 0.596

Gnomad EAS AF: 0.308

Gnomad SAS AF: 0.563

Gnomad FIN AF: 0.781

Gnomad MID AF: 0.446

Gnomad NFE AF: 0.677

Gnomad OTH AF: 0.502

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

GnomAD4 genome AF: 0.497 AC: 75657 AN: 152182 Hom.: 23403 Cov.: 34 AF XY: 0.503 AC XY: 37413 AN XY: 74426

Gnomad4 AFR AF: 0.126

Gnomad4 AMR AF: 0.518

Gnomad4 ASJ AF: 0.596

Gnomad4 EAS AF: 0.308

Gnomad4 SAS AF: 0.564

Gnomad4 FIN AF: 0.781

Gnomad4 NFE AF: 0.677

Gnomad4 OTH AF: 0.502

Alfa AF: 0.631 Hom.: 67275

Bravo AF: 0.459

Asia WGS AF: 0.406 AC: 1413 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.73
DANN	Benign	0.53

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

Other links and lift over

dbSNP: rs2777804; hg19: chr9-107571241;