NM_004936.4:c.408G>C

Variant names:

• chr9-22005996-C-G
• rs750528782
• NM_004936.4:c.408G>C

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_Strong BP6_Moderate BP7 BS2

The NM_004936.4(CDKN2B):​c.408G>C​(p.Thr136Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000414 in 1,450,086 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: CDKN2B NM_004936.4 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -4.22
• Publications: 0 publications found

Genes affected

CDKN2B (HGNC:1788): (cyclin dependent kinase inhibitor 2B) This gene lies adjacent to the tumor suppressor gene CDKN2A in a region that is frequently mutated and deleted in a wide variety of tumors. This gene encodes a cyclin-dependent kinase inhibitor, which forms a complex with CDK4 or CDK6, and prevents the activation of the CDK kinases, thus the encoded protein functions as a cell growth regulator that controls cell cycle G1 progression. The expression of this gene was found to be dramatically induced by TGF beta, which suggested its role in the TGF beta induced growth inhibition. Two alternatively spliced transcript variants of this gene, which encode distinct proteins, have been reported. [provided by RefSeq, Jul 2008]

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]

ENSG00000264545 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -11 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.76).
• BP6: Variant 9-22005996-C-G is Benign according to our data. Variant chr9-22005996-C-G is described in ClinVar as Likely_benign. ClinVar VariationId is 2659130.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-4.22 with no splicing effect.
• BS2: High AC in GnomAdExome4 at 6 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004936.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDKN2B	NM_004936.4	MANE Select	c.408G>C	p.Thr136Thr	synonymous	Exon 2 of 2	NP_004927.2
	CDKN2B-AS1	NR_003529.4	MANE Select	n.371+10835C>G		intron	N/A
	CDKN2B	NM_078487.2		c.*294G>C		3_prime_UTR	Exon 2 of 2	NP_511042.1	P42772-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDKN2B	ENST00000276925.7	TSL:1 MANE Select	c.408G>C	p.Thr136Thr	synonymous	Exon 2 of 2	ENSP00000276925.6	P42772-1
	CDKN2B	ENST00000380142.5	TSL:1	c.*294G>C		3_prime_UTR	Exon 2 of 2	ENSP00000369487.4	P42772-2
	CDKN2B-AS1	ENST00000428597.7	TSL:1 MANE Select	n.371+10835C>G		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000429 AC: 1 AN: 232864 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000293

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000414 AC: 6 AN: 1450086 Hom.: 0 Cov.: 31 AF XY: 0.00000277 AC XY: 2 AN XY: 721848

African (AFR) AF: 0.00 AC: 0 AN: 33462

American (AMR) AF: 0.0000672 AC: 3 AN: 44658

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26108

East Asian (EAS) AF: 0.00 AC: 0 AN: 39668

South Asian (SAS) AF: 0.00 AC: 0 AN: 86086

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 42784

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5430

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111706

Other (OTH) AF: 0.00 AC: 0 AN: 60184

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.76
CADD	Benign	0.16
DANN	Benign	0.66
PhyloP100		-4.2

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

Other links and lift over

dbSNP: rs750528782; hg19: chr9-22005995;