rs3218018

Positions:

• chr9-21998140-T-G

Variant summary

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

The NR_003529.3(CDKN2B-AS1):​n.371+2979T>G variant causes a intron, non coding transcript change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.087 in 152,304 control chromosomes in the GnomAD database, including 577 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 0.087 (577 hom., cov: 33)
• Consequence: CDKN2B-AS1 NR_003529.3 intron, non_coding_transcript
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.861

Genes affected

CDKN2B-AS1 (HGNC:34341): (CDKN2B antisense RNA 1) This gene is located within the CDKN2B-CDKN2A gene cluster at chromosome 9p21. The gene product is a functional RNA molecule that interacts with polycomb repressive complex-1 (PRC1) and -2 (PRC2), leading to epigenetic silencing of other genes in this cluster. This region is a significant genetic susceptibility locus for cardiovascular disease, and has also been linked to a number of other pathologies, including several cancers, intracranial aneurysm, type-2 diabetes, periodontitis, Alzheimer's disease, endometriosis, frailty in the elderly, and glaucoma. Multiple alternatively processed transcript variants have been detected, some of which may take the form of circular RNA molecules (PMID:21151960). [provided by RefSeq, May 2014]

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 (AFR) allele frequency at 95% confidence interval = 0.094 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CDKN2B-AS1	NR_003529.3	n.371+2979T>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CDKN2B-AS1	ENST00000650946.1	n.29+2979T>G		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes AF: 0.0869 AC: 13221 AN: 152186 Hom.: 575 Cov.: 33

Gnomad AFR AF: 0.0962

Gnomad AMI AF: 0.0219

Gnomad AMR AF: 0.0751

Gnomad ASJ AF: 0.0957

Gnomad EAS AF: 0.0196

Gnomad SAS AF: 0.0449

Gnomad FIN AF: 0.0813

Gnomad MID AF: 0.133

Gnomad NFE AF: 0.0930

Gnomad OTH AF: 0.0880

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

GnomAD4 genome AF: 0.0870 AC: 13243 AN: 152304 Hom.: 577 Cov.: 33 AF XY: 0.0855 AC XY: 6364 AN XY: 74460

Gnomad4 AFR AF: 0.0965

Gnomad4 AMR AF: 0.0750

Gnomad4 ASJ AF: 0.0957

Gnomad4 EAS AF: 0.0200

Gnomad4 SAS AF: 0.0452

Gnomad4 FIN AF: 0.0813

Gnomad4 NFE AF: 0.0930

Gnomad4 OTH AF: 0.0871

Alfa AF: 0.0913 Hom.: 327

Bravo AF: 0.0854

Asia WGS AF: 0.0440 AC: 153 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	13
DANN	Benign	0.71

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: rs3218018; hg19: chr9-21998139;