Variant 22-21958485-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP4_StrongBP6_ModerateBS2

The NM_001282112.2(TOP3B):c.2107+7G>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00194 in 1,613,386 control chromosomes in the GnomAD database, including 12 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.0016 ( 1 hom., cov: 33)

Exomes 𝑓: 0.0020 ( 11 hom. )

Consequence

TOP3B
NM_001282112.2 splice_region, intron

Scores

Splicing: ADA: 0.0001235

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: -1.52

Variant links:

Genes affected

TOP3B (HGNC:11993): (DNA topoisomerase III beta) This gene encodes a DNA topoisomerase, an enzyme that controls and alters the topologic states of DNA during transcription. This enzyme catalyzes the transient breaking and rejoining of a single strand of DNA which allows the strands to pass through one another, thus relaxing the supercoils and altering the topology of DNA. The enzyme interacts with DNA helicase SGS1 and plays a role in DNA recombination, cellular aging and maintenance of genome stability. Low expression of this gene may be related to higher survival rates in breast cancer patients. This gene has a pseudogene on chromosome 22. Alternate splicing results in multiple transcript variants. Additional alternatively spliced transcript variants of this gene have been described, but their full-length nature is not known. [provided by RefSeq, Aug 2013]

TOP3B links:

PPM1F-AS1 (HGNC:40888): (PPM1F antisense RNA 1)

PPM1F-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -10 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.81).

BP6

Variant 22-21958485-C-T is Benign according to our data. Variant chr22-21958485-C-T is described in ClinVar as [Benign]. Clinvar id is 715206.Status of the report is criteria_provided_single_submitter, 1 stars.

BS2

High Homozygotes in GnomAdExome4 at 11 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TOP3B	NM_001282112.2 linkuse as main transcript	c.2107+7G>A		splice_region_variant, intron_variant		ENST00000357179.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TOP3B	ENST00000357179.10 linkuse as main transcript	c.2107+7G>A		splice_region_variant, intron_variant		1	NM_001282112.2	P1	O95985-1
PPM1F-AS1	ENST00000458178.2 linkuse as main transcript	n.18705C>T		non_coding_transcript_exon_variant	2/2	1

Frequencies

GnomAD3 genomes

AF:

0.00163

AC:

248

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00236

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.000565

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00266

Gnomad OTH

AF:

0.00144

GnomAD3 exomes

AF:

0.00126

AC:

315

AN:

249374

Hom.:

AF XY:

0.00116

AC XY:

157

AN XY:

135246

show subpopulations

Gnomad AFR exome

AF:

0.000319

Gnomad AMR exome

AF:

0.00148

Gnomad ASJ exome

AF:

0.0000996

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000131

Gnomad FIN exome

AF:

0.000232

Gnomad NFE exome

AF:

0.00206

Gnomad OTH exome

AF:

0.00279

GnomAD4 exome

AF:

0.00197

AC:

2885

AN:

1461076

Hom.:

Cov.:

AF XY:

0.00194

AC XY:

1413

AN XY:

726872

show subpopulations

Gnomad4 AFR exome

AF:

0.000388

Gnomad4 AMR exome

AF:

0.00170

Gnomad4 ASJ exome

AF:

0.000115

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000301

Gnomad4 FIN exome

AF:

0.000189

Gnomad4 NFE exome

AF:

0.00237

Gnomad4 OTH exome

AF:

0.00196

GnomAD4 genome

AF:

0.00163

AC:

248

AN:

152310

Hom.:

Cov.:

AF XY:

0.00153

AC XY:

114

AN XY:

74472

show subpopulations

Gnomad4 AFR

AF:

0.000481

Gnomad4 AMR

AF:

0.00235

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000415

Gnomad4 FIN

AF:

0.000565

Gnomad4 NFE

AF:

0.00266

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.00161

Hom.:

Bravo

AF:

0.00187

EpiCase

AF:

0.00284

EpiControl

AF:

0.00296

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jul 11, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.81

CADD

Benign

0.13

DANN

Benign

0.92

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00012

dbscSNV1_RF

Benign

0.056

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