chr17-40392626-A-G

Variant names:

• chr17-40392626-A-G
• rs1303771916
• NM_001067.4:c.3923T>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001067.4(TOP2A):​c.3923T>C​(p.Phe1308Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,146 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: TOP2A NM_001067.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.25
• Publications: 0 publications found

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]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07658285).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001067.4. 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
	TOP2A	NM_001067.4	MANE Select	c.3923T>C	p.Phe1308Ser	missense	Exon 30 of 35	NP_001058.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TOP2A	ENST00000423485.6	TSL:1 MANE Select	c.3923T>C	p.Phe1308Ser	missense	Exon 30 of 35	ENSP00000411532.1	P11388-1
	TOP2A	ENST00000917864.1		c.3740T>C	p.Phe1247Ser	missense	Exon 29 of 34	ENSP00000587923.1
	TOP2A	ENST00000917865.1		c.3308T>C	p.Phe1103Ser	missense	Exon 25 of 30	ENSP00000587924.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152146 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152146 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74324

African (AFR) AF: 0.0000241 AC: 1 AN: 41422

American (AMR) AF: 0.00 AC: 0 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5198

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10612

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68022

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	18
DANN	Uncertain	0.98
DEOGEN2	Benign	0.031	T
Eigen	Benign	-0.20
Eigen_PC	Benign	0.033
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.67	T
M_CAP	Benign	0.0038	T
MetaRNN	Benign	0.077	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.3	L
PhyloP100		2.2
PrimateAI	Benign	0.45	T
PROVEAN	Benign	0.15	N
REVEL	Benign	0.073
Sift	Benign	0.40	T
Sift4G	Benign	0.61	T
Polyphen		0.078	B
Vest4		0.21
MutPred		0.26		Loss of stability (P = 9e-04)
MVP		0.24
MPC		0.24
ClinPred		0.58	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.10
gMVP		0.087

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: rs1303771916; hg19: chr17-38548878;