chr7-87560614-T-G

Variant names:

• chr7-87560614-T-G
• rs868755
• NM_001348946.2:c.827+649A>C

Variant summary

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

The NM_001348946.2(ABCB1):​c.827+649A>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.677 in 152,076 control chromosomes in the GnomAD database, including 36,712 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as drug response (no stars).

• Frequency: Genomes: 𝑓 0.68 (36712 hom., cov: 32)
• Consequence: ABCB1 NM_001348946.2 intron
• Clinical Significance: drug response no assertion criteria provided O:1
• Conservation: PhyloP100: -0.315

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=-0.91).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.915 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCB1	NM_001348946.2	c.827+649A>C		intron_variant	Intron 8 of 27	ENST00000622132.5	NP_001335875.1
ABCB1	NM_001348945.2	c.1037+649A>C		intron_variant	Intron 12 of 31		NP_001335874.1
ABCB1	NM_000927.5	c.827+649A>C		intron_variant	Intron 9 of 28		NP_000918.2
ABCB1	NM_001348944.2	c.827+649A>C		intron_variant	Intron 10 of 29		NP_001335873.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCB1	ENST00000622132.5	c.827+649A>C		intron_variant	Intron 8 of 27	1	NM_001348946.2	ENSP00000478255.1
ABCB1	ENST00000265724.8	c.827+649A>C		intron_variant	Intron 9 of 28	1		ENSP00000265724.3
ABCB1	ENST00000543898.5	c.635+649A>C		intron_variant	Intron 8 of 27	5		ENSP00000444095.1

Frequencies

GnomAD3 genomes AF: 0.677 AC: 102823 AN: 151958 Hom.: 36644 Cov.: 32

Gnomad AFR AF: 0.923

Gnomad AMI AF: 0.670

Gnomad AMR AF: 0.642

Gnomad ASJ AF: 0.669

Gnomad EAS AF: 0.584

Gnomad SAS AF: 0.414

Gnomad FIN AF: 0.548

Gnomad MID AF: 0.582

Gnomad NFE AF: 0.581

Gnomad OTH AF: 0.683

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

GnomAD4 genome AF: 0.677 AC: 102961 AN: 152076 Hom.: 36712 Cov.: 32 AF XY: 0.672 AC XY: 49936 AN XY: 74340

Gnomad4 AFR AF: 0.923

Gnomad4 AMR AF: 0.643

Gnomad4 ASJ AF: 0.669

Gnomad4 EAS AF: 0.584

Gnomad4 SAS AF: 0.416

Gnomad4 FIN AF: 0.548

Gnomad4 NFE AF: 0.581

Gnomad4 OTH AF: 0.681

Alfa AF: 0.607 Hom.: 27514

Bravo AF: 0.698

Asia WGS AF: 0.536 AC: 1866 AN: 3478

ClinVar

Significance: drug response

Submissions summary: Other:1

Revision: no assertion criteria provided

Submissions by phenotype

Tramadol response Other:1

Apr 28, 2018

Bruce Budowle Laboratory, University of North Texas Health Science Center

Significance: drug response

Review Status: no assertion criteria provided

Collection Method: research

- T:M1 = postmortem ratio or tramadol to O-desmethyltramadol; t-MP = model-based clustered metabolizer phenotype inferred from T:M1

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.27
DANN	Benign	0.73

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: rs868755; hg19: chr7-87189930;