11-2884958-GGACCGC-GGACCGCGACCGC

Position:

• chr11-2884958-GGACCGC-GGACCGCGACCGC

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP6 BS2

The NM_001122630.2(CDKN1C):​c.498_499insGCGGTC​(p.Ala165_Val166dup) variant causes a inframe insertion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000513 in 1,051,706 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000034 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000054 (1 hom.)
• Consequence: CDKN1C NM_001122630.2 inframe_insertion
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 0.427

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]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• BP6: Variant 11-2884958-G-GGACCGC is Benign according to our data. Variant chr11-2884958-G-GGACCGC is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 454009.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.
• BS2: High AC in GnomAd4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CDKN1C	NM_001122630.2	c.498_499insGCGGTC	p.Ala165_Val166dup	inframe_insertion	2/4	ENST00000440480.8	NP_001116102.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CDKN1C	ENST00000440480.8	c.498_499insGCGGTC	p.Ala165_Val166dup	inframe_insertion	2/4	1	NM_001122630.2	ENSP00000411257	A2

Frequencies

GnomAD3 genomes AF: 0.0000339 AC: 5 AN: 147314 Hom.: 0 Cov.: 32

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: 0.0000605

Gnomad OTH AF: 0.000491

GnomAD4 exome AF: 0.0000542 AC: 49 AN: 904392 Hom.: 1 Cov.: 13 AF XY: 0.0000627 AC XY: 27 AN XY: 430524

Gnomad4 AFR exome AF: 0.0000550

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000491

Gnomad4 SAS exome AF: 0.000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000568

Gnomad4 OTH exome AF: 0.0000281

GnomAD4 genome AF: 0.0000339 AC: 5 AN: 147314 Hom.: 0 Cov.: 32 AF XY: 0.0000279 AC XY: 2 AN XY: 71766

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: 0.0000605

Gnomad4 OTH AF: 0.000491

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Beckwith-Wiedemann syndrome Uncertain:1 Benign:1

Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	Jun 09, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 22, 2023	- -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs889984547; hg19: chr11-2906188;