Genetic Variant TOP6BL:p.His131Asn (chr11-66804038-C-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001302084.2(TOP6BL):c.391C>A(p.His131Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000349 in 1,613,360 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00037 ( 0 hom. )

Consequence

TOP6BL
NM_001302084.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.67

Publications

2 publications found

Variant links:

Genes affected

TOP6BL (HGNC:26197): (TOP6B like initiator of meiotic double strand breaks) Predicted to be involved in meiotic DNA double-strand break formation and reciprocal meiotic recombination. Predicted to be located in chromosome. Implicated in gestational trophoblastic neoplasm. [provided by Alliance of Genome Resources, Apr 2022]

TOP6BL Gene-Disease associations (from GenCC):

hydatidiform mole, recurrent, 4
Inheritance: AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

TOP6BL links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.19944578).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001302084.2. 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
	TOP6BL	NM_001302084.2	MANE Select	c.391C>A	p.His131Asn	missense	Exon 7 of 15	NP_001289013.1	Q8N6T0-6
	TOP6BL	NM_024650.4		c.739C>A	p.His247Asn	missense	Exon 9 of 17	NP_078926.4

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TOP6BL	ENST00000540737.7	TSL:2 MANE Select	c.391C>A	p.His131Asn	missense	Exon 7 of 15	ENSP00000444319.1	Q8N6T0-6
TOP6BL	ENST00000525449.6	TSL:1	c.421C>A	p.His141Asn	missense	Exon 8 of 15	ENSP00000434648.2	A0A140TA08
TOP6BL	ENST00000525908.6	TSL:2	c.739C>A	p.His247Asn	missense	Exon 9 of 17	ENSP00000432039.3	A0A2U3TZP7

Frequencies

GnomAD3 genomes

AF:

0.000184

AC:

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

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:

0.000323

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000109

AC:

AN:

248072

AF XY:

0.0000743

show subpopulations

Gnomad AFR exome

AF:

0.000129

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000223

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000366

AC:

535

AN:

1461026

Hom.:

Cov.:

AF XY:

0.000343

AC XY:

249

AN XY:

726744

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33458

American (AMR)

AF:

0.00

AC:

AN:

44578

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26118

East Asian (EAS)

AF:

0.00

AC:

AN:

39684

South Asian (SAS)

AF:

0.00

AC:

AN:

86058

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53400

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000470

AC:

522

AN:

1111606

Other (OTH)

AF:

0.000199

AC:

AN:

60356

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

114

143

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

120

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000184

AC:

AN:

152334

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74486

show subpopulations

African (AFR)

AF:

0.000144

AC:

AN:

41580

American (AMR)

AF:

0.00

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000323

AC:

AN:

68038

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.493

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000227

Hom.:

Bravo

AF:

0.000144

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000476

AC:

ExAC

AF:

0.0000826

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000415

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.41

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.16

CADD

Uncertain

(source)

DANN

Uncertain

0.99

Eigen

Uncertain

0.55

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Uncertain

0.90

LIST_S2

Benign

0.81

M_CAP

Benign

0.015

MetaRNN

Benign

0.20

MetaSVM

Benign

-0.52

PhyloP100

2.7

PROVEAN

Pathogenic

-6.3

REVEL

Benign

0.18

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.77

MVP

0.17

MPC

0.24

ClinPred

0.42

GERP RS

5.4

gMVP

0.73

Mutation Taster

=68/32

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over