chr17-40389582-T-G

Variant names:

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_001067.4(TOP2A):c.4533A>C(p.Lys1511Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000554 in 1,605,414 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000055 ( 0 hom. )

Consequence

TOP2A
NM_001067.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.912

Variant links:

Genes affected

TOP2A (HGNC:11989): (DNA topoisomerase II alpha) This gene encodes a DNA topoisomerase, an enzyme that controls and alters the topologic states of DNA during transcription. This nuclear enzyme is involved in processes such as chromosome condensation, chromatid separation, and the relief of torsional stress that occurs during DNA transcription and replication. It catalyzes the transient breaking and rejoining of two strands of duplex DNA which allows the strands to pass through one another, thus altering the topology of DNA. Two forms of this enzyme exist as likely products of a gene duplication event. The gene encoding this form, alpha, is localized to chromosome 17 and the beta gene is localized to chromosome 3. The gene encoding this enzyme functions as the target for several anticancer agents and a variety of mutations in this gene have been associated with the development of drug resistance. Reduced activity of this enzyme may also play a role in ataxia-telangiectasia. [provided by RefSeq, Jul 2010]

TOP2A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.040191412).

BS2

High AC in GnomAd4 at 9 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TOP2A	NM_001067.4 link	c.4533A>C	p.Lys1511Asn	missense_variant	Exon 35 of 35	ENST00000423485.6	NP_001058.2	P11388-1
TOP2A	XM_005257632.2 link	c.4497A>C	p.Lys1499Asn	missense_variant	Exon 35 of 35		XP_005257689.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TOP2A	ENST00000423485.6 link	c.4533A>C	p.Lys1511Asn	missense_variant	Exon 35 of 35	1	NM_001067.4	ENSP00000411532.1	P11388-1
TOP2A	ENST00000577541.1 link	c.21A>C	p.Lys7Asn	missense_variant	Exon 1 of 2	2		ENSP00000464055.1	J3QR57
TOP2A	ENST00000578412.1 link	n.862A>C		non_coding_transcript_exon_variant	Exon 3 of 3	2

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152176

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00260

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000115

AC:

AN:

234804

Hom.:

AF XY:

0.000110

AC XY:

AN XY:

127088

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00248

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000190

Gnomad OTH exome

AF:

0.000173

GnomAD4 exome

AF:

0.0000550

AC:

AN:

1453238

Hom.:

Cov.:

AF XY:

0.0000568

AC XY:

AN XY:

721924

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00236

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000993

Gnomad4 OTH exome

AF:

0.000117

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152176

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74330

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00260

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000230

Hom.:

Bravo

AF:

0.0000718

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000122

AC:

ExAC

AF:

0.0000828

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 27, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.4533A>C (p.K1511N) alteration is located in exon 35 (coding exon 35) of the TOP2A gene. This alteration results from a A to C substitution at nucleotide position 4533, causing the lysine (K) at amino acid position 1511 to be replaced by an asparagine (N). 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

Uncertain

0.36

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.47

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.10

T;T

Eigen

Benign

-0.19

Eigen_PC

Benign

-0.19

FATHMM_MKL

Uncertain

0.88

LIST_S2

Benign

0.68

T;T

M_CAP

Benign

0.048

MetaRNN

Benign

0.040

T;T

MetaSVM

Benign

-0.89

MutationAssessor

Benign

1.8

L;.

PrimateAI

Uncertain

0.48

PROVEAN

Benign

-1.6

N;.

REVEL

Benign

0.083

Sift

Uncertain

0.017

D;.

Sift4G

Benign

0.40

T;D

Polyphen

0.51

P;.

Vest4

0.17

MutPred

0.63

Loss of methylation at K1511 (P = 0.023);.;

MVP

0.58

MPC

0.17

ClinPred

0.059

GERP RS

1.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.13

gMVP

0.11

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