rs4148742

Variant names:

• chr7-87522729-A-G
• rs4148742
• NM_001348946.2:c.2686-1853T>C

Variant summary

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

The NM_001348946.2(ABCB1):​c.2686-1853T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.138 in 152,018 control chromosomes in the GnomAD database, including 1,588 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 0.14 (1588 hom., cov: 32)
• Consequence: ABCB1 NM_001348946.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.00900

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=-0.76).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.193 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCB1	NM_001348946.2	c.2686-1853T>C		intron_variant	Intron 21 of 27	ENST00000622132.5	NP_001335875.1
ABCB1	NM_001348945.2	c.2896-1853T>C		intron_variant	Intron 25 of 31		NP_001335874.1
ABCB1	NM_000927.5	c.2686-1853T>C		intron_variant	Intron 22 of 28		NP_000918.2
ABCB1	NM_001348944.2	c.2686-1853T>C		intron_variant	Intron 23 of 29		NP_001335873.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCB1	ENST00000622132.5	c.2686-1853T>C		intron_variant	Intron 21 of 27	1	NM_001348946.2	ENSP00000478255.1

Frequencies

GnomAD3 genomes AF: 0.138 AC: 20979 AN: 151900 Hom.: 1579 Cov.: 32

Gnomad AFR AF: 0.196

Gnomad AMI AF: 0.219

Gnomad AMR AF: 0.114

Gnomad ASJ AF: 0.150

Gnomad EAS AF: 0.0595

Gnomad SAS AF: 0.150

Gnomad FIN AF: 0.0475

Gnomad MID AF: 0.152

Gnomad NFE AF: 0.126

Gnomad OTH AF: 0.134

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

GnomAD4 genome AF: 0.138 AC: 21031 AN: 152018 Hom.: 1588 Cov.: 32 AF XY: 0.135 AC XY: 10026 AN XY: 74300

Gnomad4 AFR AF: 0.197

Gnomad4 AMR AF: 0.114

Gnomad4 ASJ AF: 0.150

Gnomad4 EAS AF: 0.0593

Gnomad4 SAS AF: 0.151

Gnomad4 FIN AF: 0.0475

Gnomad4 NFE AF: 0.126

Gnomad4 OTH AF: 0.135

Alfa AF: 0.130 Hom.: 147

Bravo AF: 0.144

Asia WGS AF: 0.128 AC: 447 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.76
CADD	Benign	0.93
DANN	Benign	0.50

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: rs4148742; hg19: chr7-87152045;