19-41010277-C-T

Position:

• chr19-41010277-C-T

Variant summary

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

The NM_000767.5(CYP2B6):​c.964+142C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.262 in 967,550 control chromosomes in the GnomAD database, including 35,555 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 0.30 (7279 hom., cov: 31)
  • Exomes 𝑓: 0.26 (28276 hom.)
• Consequence: CYP2B6 NM_000767.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.194

Genes affected

CYP2B6 (HGNC:2615): (cytochrome P450 family 2 subfamily B member 6) This gene, CYP2B6, encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and its expression is induced by phenobarbital. The enzyme is known to metabolize some xenobiotics, such as the anti-cancer drugs cyclophosphamide and ifosphamide. Transcript variants for this gene have been described; however, it has not been resolved whether these transcripts are in fact produced by this gene or by a closely related pseudogene, CYP2B7. Both the gene and the pseudogene are located in the middle of a CYP2A pseudogene found in a large cluster of cytochrome P450 genes from the CYP2A, CYP2B and CYP2F subfamilies on chromosome 19q. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.401 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CYP2B6	NM_000767.5	c.964+142C>T		intron_variant		ENST00000324071.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CYP2B6	ENST00000324071.10	c.964+142C>T		intron_variant		1	NM_000767.5	P1
CYP2B6	ENST00000597612.1	n.459+142C>T		intron_variant, non_coding_transcript_variant		1
CYP2B6	ENST00000593831.1	c.257-2021C>T		intron_variant		2
CYP2B6	ENST00000598834.2	c.*405+142C>T		intron_variant, NMD_transcript_variant		5

Frequencies

GnomAD3 genomes AF: 0.297 AC: 45114 AN: 151908 Hom.: 7279 Cov.: 31

Gnomad AFR AF: 0.407

Gnomad AMI AF: 0.107

Gnomad AMR AF: 0.344

Gnomad ASJ AF: 0.263

Gnomad EAS AF: 0.208

Gnomad SAS AF: 0.379

Gnomad FIN AF: 0.191

Gnomad MID AF: 0.297

Gnomad NFE AF: 0.241

Gnomad OTH AF: 0.303

GnomAD4 exome AF: 0.255 AC: 208244 AN: 815524 Hom.: 28276 AF XY: 0.260 AC XY: 108653 AN XY: 417512

Gnomad4 AFR exome AF: 0.413

Gnomad4 AMR exome AF: 0.316

Gnomad4 ASJ exome AF: 0.264

Gnomad4 EAS exome AF: 0.188

Gnomad4 SAS exome AF: 0.385

Gnomad4 FIN exome AF: 0.194

Gnomad4 NFE exome AF: 0.240

Gnomad4 OTH exome AF: 0.263

GnomAD4 genome AF: 0.297 AC: 45131 AN: 152026 Hom.: 7279 Cov.: 31 AF XY: 0.297 AC XY: 22036 AN XY: 74320

Gnomad4 AFR AF: 0.406

Gnomad4 AMR AF: 0.344

Gnomad4 ASJ AF: 0.263

Gnomad4 EAS AF: 0.207

Gnomad4 SAS AF: 0.377

Gnomad4 FIN AF: 0.191

Gnomad4 NFE AF: 0.241

Gnomad4 OTH AF: 0.306

Alfa AF: 0.141 Hom.: 243

Bravo AF: 0.309

Asia WGS AF: 0.319 AC: 1105 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
CADD	Benign	4.7
DANN	Benign	0.33

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: rs2306606; hg19: chr19-41516182; COSMIC: COSV57845978; COSMIC: COSV57845978;