rs786201007

Variant names:

• chr12-12717896-G-GCAGGCGGAGCACCCCAAGC
• rs786201007
• NM_004064.5:c.59_77dupAGGCGGAGCACCCCAAGCC

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PVS1 PP5

The NM_004064.5(CDKN1B):​c.59_77dupAGGCGGAGCACCCCAAGCC​(p.Ser27GlyfsTer104) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. P26P) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CDKN1B NM_004064.5 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.65
• Publications: 10 publications found

Genes affected

CDKN1B (HGNC:1785): (cyclin dependent kinase inhibitor 1B) This gene encodes a cyclin-dependent kinase inhibitor, which shares a limited similarity with CDK inhibitor CDKN1A/p21. The encoded protein binds to and prevents the activation of cyclin E-CDK2 or cyclin D-CDK4 complexes, and thus controls the cell cycle progression at G1. The degradation of this protein, which is triggered by its CDK dependent phosphorylation and subsequent ubiquitination by SCF complexes, is required for the cellular transition from quiescence to the proliferative state. Mutations in this gene are associated with multiple endocrine neoplasia type IV (MEN4). [provided by RefSeq, Apr 2014]

CDKN1B Gene-Disease associations (from GenCC):

• multiple endocrine neoplasia type 4

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
• multiple endocrine neoplasia

  Inheritance: AD Classification: STRONG Submitted by: G2P
• hereditary nonpolyposis colon cancer

  Inheritance: Unknown Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 93 pathogenic variants in the truncated region.
• PP5: Variant 12-12717896-G-GCAGGCGGAGCACCCCAAGC is Pathogenic according to our data. Variant chr12-12717896-G-GCAGGCGGAGCACCCCAAGC is described in ClinVar as Pathogenic. ClinVar VariationId is 183391.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004064.5. 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
	CDKN1B	NM_004064.5	MANE Select	c.59_77dupAGGCGGAGCACCCCAAGCC	p.Ser27GlyfsTer104	frameshift	Exon 1 of 3	NP_004055.1	Q6I9V6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDKN1B	ENST00000228872.9	TSL:1 MANE Select	c.59_77dupAGGCGGAGCACCCCAAGCC	p.Ser27GlyfsTer104	frameshift	Exon 1 of 3	ENSP00000228872.4	P46527
	CDKN1B	ENST00000396340.1	TSL:3	c.59_77dupAGGCGGAGCACCCCAAGCC	p.Ser27GlyfsTer104	frameshift	Exon 1 of 2	ENSP00000379629.1	E7ES52
	CDKN1B	ENST00000614874.2	TSL:6	c.59_77dupAGGCGGAGCACCCCAAGCC	p.Ser27GlyfsTer104	frameshift	Exon 1 of 2	ENSP00000507272.1	P46527

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 51

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Multiple endocrine neoplasia type 4 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		3.7
Mutation Taster		=3/197	disease causing (ClinVar)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs786201007; hg19: chr12-12870830;