11-2884935-AGCCGGGGCCGGGGCCGGG-AGCCGGGGCCGGG

Variant names:

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP3BP6_Very_StrongBS1BS2

The NM_001122630.2(CDKN1C):c.516_521delCCCGGC(p.Pro173_Ala174del) variant causes a disruptive inframe deletion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000142 in 900,922 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. A172A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

CDKN1C
NM_001122630.2 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.666

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

Beckwith-Wiedemann syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
IMAGe syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Illumina, G2P, Ambry Genetics
rhabdomyosarcoma
Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
Beckwith-Wiedemann syndrome due to CDKN1C mutation
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
intrauterine growth restriction-short stature-early adult-onset diabetes syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Silver-Russell syndrome
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

CDKN1C links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -17 ACMG points.

BP3

Nonframeshift variant in repetitive region in NM_001122630.2

BP6

Variant 11-2884935-AGCCGGG-A is Benign according to our data. Variant chr11-2884935-AGCCGGG-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 412857.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000199 (27/135376) while in subpopulation NFE AF = 0.000292 (18/61720). AF 95% confidence interval is 0.000188. There are 0 homozygotes in GnomAd4. There are 10 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 27 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDKN1C	NM_001122630.2 link	c.516_521delCCCGGC	p.Pro173_Ala174del	disruptive_inframe_deletion	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.516_521delCCCGGC	p.Pro173_Ala174del	disruptive_inframe_deletion	Exon 2 of 4	1	NM_001122630.2	ENSP00000411257.2		P49918-2

Frequencies

GnomAD3 genomes

AF:

0.000199

AC:

AN:

135376

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000189

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000716

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000129

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000292

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00

AC:

AN:

122

AF XY:

0.00

Gnomad AMR 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:

0.000132

AC:

101

AN:

765546

Hom.:

AF XY:

0.000127

AC XY:

AN XY:

362944

show subpopulations

African (AFR)

AF:

0.000410

AC:

AN:

14626

American (AMR)

AF:

0.00

AC:

AN:

4428

Ashkenazi Jewish (ASJ)

AF:

0.000122

AC:

AN:

8218

East Asian (EAS)

AF:

0.0000781

AC:

AN:

12798

South Asian (SAS)

AF:

0.0000691

AC:

AN:

14462

European-Finnish (FIN)

AF:

0.000153

AC:

AN:

13094

Middle Eastern (MID)

AF:

0.00209

AC:

AN:

1918

European-Non Finnish (NFE)

AF:

0.000120

AC:

AN:

667256

Other (OTH)

AF:

0.000209

AC:

AN:

28746

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.519

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000199

AC:

AN:

135376

Hom.:

Cov.:

AF XY:

0.000152

AC XY:

AN XY:

65762

show subpopulations

African (AFR)

AF:

0.000189

AC:

AN:

37112

American (AMR)

AF:

0.0000716

AC:

AN:

13968

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3200

East Asian (EAS)

AF:

0.00

AC:

AN:

4532

South Asian (SAS)

AF:

0.00

AC:

AN:

4194

European-Finnish (FIN)

AF:

0.000129

AC:

AN:

7746

Middle Eastern (MID)

AF:

0.00

AC:

AN:

254

European-Non Finnish (NFE)

AF:

0.000292

AC:

AN:

61720

Other (OTH)

AF:

0.00

AC:

AN:

1846

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.464

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

May 23, 2017

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

CDKN1C-related disorder

Benign:1

Mar 04, 2024

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Beckwith-Wiedemann syndrome

Benign:1

Jan 22, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:1

Nov 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

CDKN1C: BP3 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.67

Mutation Taster

=185/15

polymorphism

(source)

Splicing

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over