chr11-2884865-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBS1_SupportingBS2

The NM_001122630.2(CDKN1C):c.592G>A(p.Ala198Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000692 in 794,338 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00010 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000062 ( 0 hom. )

Consequence

CDKN1C
NM_001122630.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 0.457

Variant links:

Genes affected

CDKN1C (HGNC:1786): (cyclin dependent kinase inhibitor 1C) This gene is imprinted, with preferential expression of the maternal allele. The encoded protein is a tight-binding, strong inhibitor of several G1 cyclin/Cdk complexes and a negative regulator of cell proliferation. Mutations in this gene are implicated in sporadic cancers and Beckwith-Wiedemann syndorome, suggesting that this gene is a tumor suppressor candidate. Three transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Oct 2010]

CDKN1C links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0014585555).

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000102 (14/137494) while in subpopulation SAS AF= 0.00306 (14/4570). AF 95% confidence interval is 0.00185. There are 0 homozygotes in gnomad4. There are 12 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High AC in GnomAd4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDKN1C	NM_001122630.2 link	c.592G>A	p.Ala198Thr	missense_variant	Exon 2 of 4	ENST00000440480.8	NP_001116102.1	P49918-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDKN1C	ENST00000440480.8 link	c.592G>A	p.Ala198Thr	missense_variant	Exon 2 of 4	1	NM_001122630.2	ENSP00000411257.2		P49918-2

Frequencies

GnomAD3 genomes

AF:

0.000102

AC:

AN:

137406

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:

0.00306

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.188

AC:

AN:

Hom.:

AF XY:

0.300

AC XY:

AN XY:

show subpopulations

Gnomad SAS exome

AF:

0.500

Gnomad NFE exome

AF:

0.00

GnomAD4 exome

AF:

0.0000624

AC:

AN:

656844

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

309322

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000167

Gnomad4 SAS exome

AF:

0.00262

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000170

Gnomad4 OTH exome

AF:

0.000133

GnomAD4 genome

AF:

0.000102

AC:

AN:

137494

Hom.:

Cov.:

AF XY:

0.000179

AC XY:

AN XY:

66974

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:

0.00306

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.00223

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Beckwith-Wiedemann syndrome;C1846009:IMAGe syndrome

Uncertain:1

Dec 08, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Beckwith-Wiedemann syndrome

Uncertain:1

Jan 06, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 209 of the CDKN1C protein (p.Ala209Thr). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with CDKN1C-related conditions. ClinVar contains an entry for this variant (Variation ID: 524700). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt CDKN1C protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.099

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.64

CADD

Benign

DANN

Benign

0.93

DEOGEN2

Benign

0.049

T;T;.

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.10

LIST_S2

Uncertain

0.95

.;D;D

MetaRNN

Benign

0.0015

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.34

N;N;.

PrimateAI

Uncertain

0.74

PROVEAN

Benign

0.0

N;N;N

REVEL

Benign

0.023

Sift

Benign

0.35

T;T;T

Sift4G

Uncertain

0.046

D;D;D

Polyphen

0.0050

B;B;.

Vest4

0.14

MutPred

0.29

Gain of glycosylation at A209 (P = 0);Gain of glycosylation at A209 (P = 0);.;

MPC

1.2

ClinPred

0.038

GERP RS

-2.6

Varity_R

0.031

gMVP

0.065

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