Genetic Variant CCNA2:p.Ile270Leu (chr4-121819566-T-G) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_001237.5(CCNA2):c.808A>C(p.Ile270Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,612,610 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CCNA2
NM_001237.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.95

Variant links:

Genes affected

CCNA2 (HGNC:1578): (cyclin A2) The protein encoded by this gene belongs to the highly conserved cyclin family, whose members function as regulators of the cell cycle. This protein binds and activates cyclin-dependent kinase 2 and thus promotes transition through G1/S and G2/M. [provided by RefSeq, Aug 2016]

CCNA2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.804

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCNA2	NM_001237.5 link	c.808A>C	p.Ile270Leu	missense_variant	Exon 5 of 8	ENST00000274026.10	NP_001228.2	P20248

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCNA2	ENST00000274026.10 link	c.808A>C	p.Ile270Leu	missense_variant	Exon 5 of 8	1	NM_001237.5	ENSP00000274026.5		P20248

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152226

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460384

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726560

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152226

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74384

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:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 22, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.808A>C (p.I270L) alteration is located in exon 5 (coding exon 5) of the CCNA2 gene. This alteration results from a A to C substitution at nucleotide position 808, causing the isoleucine (I) at amino acid position 270 to be replaced by a leucine (L). 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

Pathogenic

0.93

BayesDel_addAF

Benign

0.0065

BayesDel_noAF

Benign

-0.23

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Benign

0.22

T;T

Eigen

Pathogenic

0.73

Eigen_PC

Pathogenic

0.67

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.93

.;D

M_CAP

Benign

0.028

MetaRNN

Pathogenic

0.80

D;D

MetaSVM

Benign

-0.87

MutationAssessor

Pathogenic

3.3

M;M

PrimateAI

Uncertain

0.77

PROVEAN

Benign

-1.8

N;.

REVEL

Uncertain

0.33

Sift

Uncertain

0.0040

D;.

Sift4G

Uncertain

0.013

D;D

Polyphen

0.92

P;P

Vest4

0.76

MutPred

0.64

Loss of methylation at K266 (P = 0.0592);Loss of methylation at K266 (P = 0.0592);

MVP

0.52

MPC

1.5

ClinPred

0.94

GERP RS

4.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.9

Varity_R

0.83

gMVP

0.51

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