1-50974171-G-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_078626.3(CDKN2C):c.408G>C(p.Lys136Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,613,780 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CDKN2C
NM_078626.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.295

Variant links:

Genes affected

CDKN2C (HGNC:1789): (cyclin dependent kinase inhibitor 2C) The protein encoded by this gene is a member of the INK4 family of cyclin-dependent kinase inhibitors. This protein has been shown to interact with CDK4 or CDK6, and prevent the activation of the CDK kinases, thus function as a cell growth regulator that controls cell cycle G1 progression. Ectopic expression of this gene was shown to suppress the growth of human cells in a manner that appears to correlate with the presence of a wild-type RB1 function. Studies in the knockout mice suggested the roles of this gene in regulating spermatogenesis, as well as in suppressing tumorigenesis. Two alternatively spliced transcript variants of this gene, which encode an identical protein, have been reported. [provided by RefSeq, Jul 2008]

CDKN2C links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.05245793).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CDKN2C	NM_078626.3 linkuse as main transcript	c.408G>C	p.Lys136Asn	missense_variant	2/2	ENST00000371761.4
CDKN2C	NM_001262.3 linkuse as main transcript	c.408G>C	p.Lys136Asn	missense_variant	3/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
CDKN2C	ENST00000371761.4 linkuse as main transcript	c.408G>C	p.Lys136Asn	missense_variant	2/2	1	NM_078626.3	P1
CDKN2C	ENST00000396148.2 linkuse as main transcript	c.408G>C	p.Lys136Asn	missense_variant	3/3	1		P1
CDKN2C	ENST00000262662.5 linkuse as main transcript	c.408G>C	p.Lys136Asn	missense_variant	4/4	2		P1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461548

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727020

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152232

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74366

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 03, 2021

The c.408G>C (p.K136N) alteration is located in exon 3 (coding exon 2) of the CDKN2C gene. This alteration results from a G to C substitution at nucleotide position 408, causing the lysine (K) at amino acid position 136 to be replaced by an asparagine (N). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.79

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.58

Cadd

Benign

Dann

Benign

0.96

DEOGEN2

Benign

0.092

T;T;T

Eigen

Benign

-1.0

Eigen_PC

Benign

-0.87

FATHMM_MKL

Benign

0.16

M_CAP

Benign

0.014

MetaRNN

Benign

0.052

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.0

N;N;N

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.31

PROVEAN

Benign

-0.64

N;N;N

REVEL

Benign

0.044

Sift

Benign

0.11

T;T;T

Sift4G

Benign

0.53

T;T;T

Polyphen

0.0

B;B;B

Vest4

0.093

MutPred

0.38

Loss of ubiquitination at K136 (P = 0.013);Loss of ubiquitination at K136 (P = 0.013);Loss of ubiquitination at K136 (P = 0.013);

MVP

0.43

MPC

0.52

ClinPred

0.024

GERP RS

0.52

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Varity_R

0.43

gMVP

0.52

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over