NM_001122630.2:c.902G>A

Variant names:

• chr11-2884020-C-T
• rs1161543117
• NM_001122630.2:c.902G>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001122630.2(CDKN1C):​c.902G>A​(p.Arg301His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000711 in 1,405,948 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R301C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: CDKN1C NM_001122630.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.30
• Publications: 0 publications found

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: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• IMAGe syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, Illumina
• 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

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.4146765).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001122630.2. 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
	CDKN1C	NM_001122630.2	MANE Select	c.902G>A	p.Arg301His	missense	Exon 3 of 4	NP_001116102.1	P49918-2
	CDKN1C	NM_000076.2		c.935G>A	p.Arg312His	missense	Exon 2 of 3	NP_000067.1	P49918-1
	CDKN1C	NM_001362474.2		c.935G>A	p.Arg312His	missense	Exon 2 of 3	NP_001349403.1	P49918-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDKN1C	ENST00000440480.8	TSL:1 MANE Select	c.902G>A	p.Arg301His	missense	Exon 3 of 4	ENSP00000411257.2	P49918-2
	CDKN1C	ENST00000414822.8	TSL:1	c.935G>A	p.Arg312His	missense	Exon 2 of 3	ENSP00000413720.3	P49918-1
	CDKN1C	ENST00000430149.3	TSL:1	c.935G>A	p.Arg312His	missense	Exon 2 of 3	ENSP00000411552.2	P49918-1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.11e-7 AC: 1 AN: 1405948 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 694672

African (AFR) AF: 0.00 AC: 0 AN: 32196

American (AMR) AF: 0.00 AC: 0 AN: 37058

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25212

East Asian (EAS) AF: 0.00 AC: 0 AN: 36806

South Asian (SAS) AF: 0.00 AC: 0 AN: 80146

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 46772

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5564

European-Non Finnish (NFE) AF: 9.23e-7 AC: 1 AN: 1083940

Other (OTH) AF: 0.00 AC: 0 AN: 58254

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Beckwith-Wiedemann syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.060
CADD	Pathogenic	28
DANN	Uncertain	0.99
DEOGEN2	Benign	0.012	T
Eigen	Uncertain	0.35
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.48	T
M_CAP	Pathogenic	0.96	D
MetaRNN	Benign	0.41	T
MetaSVM	Uncertain	0.36	D
PhyloP100		2.3
PROVEAN	Benign	-0.12	N
REVEL	Uncertain	0.32
Sift	Pathogenic	0.0	D
Sift4G	Benign	0.78	T
Polyphen		0.90	P
Vest4		0.21
MutPred		0.11		Gain of phosphorylation at A124 (P = 0.0085)
MVP		0.60
ClinPred		0.93	D
GERP RS		1.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.42
Mutation Taster		=49/51	disease causing

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

Other links and lift over

dbSNP: rs1161543117; hg19: chr11-2905250;