rs1922241

Positions:

• chr7-87556578-G-A

Variant summary

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

The NM_001348946.2(ABCB1):​c.828-2646C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.295 in 151,920 control chromosomes in the GnomAD database, including 6,774 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 0.29 (6774 hom., cov: 31)
• Consequence: ABCB1 NM_001348946.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.913

Genes affected

ABCB1 (HGNC:40): (ATP binding cassette subfamily B 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 intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MDR/TAP subfamily. Members of the MDR/TAP subfamily are involved in multidrug resistance. The protein encoded by this gene is an ATP-dependent drug efflux pump for xenobiotic compounds with broad substrate specificity. It is responsible for decreased drug accumulation in multidrug-resistant cells and often mediates the development of resistance to anticancer drugs. This protein also functions as a transporter in the blood-brain barrier. Mutations in this gene are associated with colchicine resistance and Inflammatory bowel disease 13. Alternative splicing and the use of alternative promoters results in multiple transcript variants. [provided by RefSeq, Feb 2017]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.78).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.358 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABCB1	NM_001348946.2	c.828-2646C>T		intron_variant		ENST00000622132.5	NP_001335875.1
ABCB1	NM_000927.5	c.828-2646C>T		intron_variant			NP_000918.2
ABCB1	NM_001348944.2	c.828-2646C>T		intron_variant			NP_001335873.1
ABCB1	NM_001348945.2	c.1038-2646C>T		intron_variant			NP_001335874.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABCB1	ENST00000622132.5	c.828-2646C>T		intron_variant		1	NM_001348946.2	ENSP00000478255	P1
ABCB1	ENST00000265724.8	c.828-2646C>T		intron_variant		1		ENSP00000265724	P1
ABCB1	ENST00000543898.5	c.636-2646C>T		intron_variant		5		ENSP00000444095

Frequencies

GnomAD3 genomes AF: 0.295 AC: 44747 AN: 151802 Hom.: 6770 Cov.: 31

Gnomad AFR AF: 0.214

Gnomad AMI AF: 0.396

Gnomad AMR AF: 0.366

Gnomad ASJ AF: 0.383

Gnomad EAS AF: 0.295

Gnomad SAS AF: 0.216

Gnomad FIN AF: 0.298

Gnomad MID AF: 0.322

Gnomad NFE AF: 0.326

Gnomad OTH AF: 0.341

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

GnomAD4 genome AF: 0.295 AC: 44771 AN: 151920 Hom.: 6774 Cov.: 31 AF XY: 0.294 AC XY: 21858 AN XY: 74242

Gnomad4 AFR AF: 0.213

Gnomad4 AMR AF: 0.366

Gnomad4 ASJ AF: 0.383

Gnomad4 EAS AF: 0.295

Gnomad4 SAS AF: 0.217

Gnomad4 FIN AF: 0.298

Gnomad4 NFE AF: 0.326

Gnomad4 OTH AF: 0.336

Alfa AF: 0.327 Hom.: 8171

Bravo AF: 0.297

Asia WGS AF: 0.240 AC: 837 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.78
CADD	Benign	0.57
DANN	Benign	0.57

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs1922241; hg19: chr7-87185894;