Genetic Variant CDK6:p.Arg220His (chr7-92623075-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001145306.2(CDK6):c.659G>A(p.Arg220His) variant causes a missense change. The variant allele was found at a frequency of 0.0000259 in 1,581,806 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

CDK6
NM_001145306.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.24

Variant links:

Genes affected

CDK6 (HGNC:1777): (cyclin dependent kinase 6) The protein encoded by this gene is a member of the CMGC family of serine/threonine protein kinases. This kinase is a catalytic subunit of the protein kinase complex that is important for cell cycle G1 phase progression and G1/S transition. The activity of this kinase first appears in mid-G1 phase, which is controlled by the regulatory subunits including D-type cyclins and members of INK4 family of CDK inhibitors. This kinase, as well as CDK4, has been shown to phosphorylate, and thus regulate the activity of, tumor suppressor protein Rb. Altered expression of this gene has been observed in multiple human cancers. A mutation in this gene resulting in reduced cell proliferation, and impaired cell motility and polarity, and has been identified in patients with primary microcephaly. [provided by RefSeq, Aug 2017]

CDK6 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDK6	NM_001145306.2 link	c.659G>A	p.Arg220His	missense_variant	Exon 6 of 8	ENST00000424848.3	NP_001138778.1	Q00534
CDK6	NM_001259.8 link	c.659G>A	p.Arg220His	missense_variant	Exon 6 of 8		NP_001250.1	Q00534
CDK6	XM_047419716.1 link	c.659G>A	p.Arg220His	missense_variant	Exon 6 of 8		XP_047275672.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDK6	ENST00000424848.3 link	c.659G>A	p.Arg220His	missense_variant	Exon 6 of 8	1	NM_001145306.2	ENSP00000397087.3		Q00534
CDK6	ENST00000265734.8 link	c.659G>A	p.Arg220His	missense_variant	Exon 6 of 8	1		ENSP00000265734.4		Q00534

Frequencies

GnomAD3 genomes

AF:

0.0000264

AC:

AN:

151736

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000257

AC:

AN:

233276

Hom.:

AF XY:

0.0000238

AC XY:

AN XY:

126090

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000103

Gnomad EAS exome

AF:

0.000114

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000479

Gnomad NFE exome

AF:

0.0000195

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000259

AC:

AN:

1430070

Hom.:

Cov.:

AF XY:

0.0000253

AC XY:

AN XY:

712048

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000777

Gnomad4 EAS exome

AF:

0.000102

Gnomad4 SAS exome

AF:

0.0000238

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000239

Gnomad4 OTH exome

AF:

0.0000338

GnomAD4 genome

AF:

0.0000264

AC:

AN:

151736

Hom.:

Cov.:

AF XY:

0.0000540

AC XY:

AN XY:

74090

show subpopulations

Gnomad4 AFR

AF:

0.0000242

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:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000912

Hom.:

Bravo

AF:

0.0000189

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000248

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 13, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.659G>A (p.R220H) alteration is located in exon 6 (coding exon 5) of the CDK6 gene. This alteration results from a G to A substitution at nucleotide position 659, causing the arginine (R) at amino acid position 220 to be replaced by a histidine (H). 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

Benign

0.26

BayesDel_addAF

Benign

-0.051

BayesDel_noAF

Benign

-0.090

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.32

T;T

Eigen

Uncertain

0.51

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.97

.;D

M_CAP

Benign

0.027

MetaRNN

Uncertain

0.55

D;D

MetaSVM

Benign

-0.69

MutationAssessor

Benign

1.2

L;L

PrimateAI

Pathogenic

0.82

PROVEAN

Benign

-1.0

N;N

REVEL

Uncertain

0.31

Sift

Benign

0.34

T;T

Sift4G

Benign

0.31

T;T

Polyphen

1.0

D;D

Vest4

0.48

MVP

0.79

MPC

1.8

ClinPred

0.53

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.55

gMVP

0.62

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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