dbSNP rs17123571: DNMT3B:c.-6-8427G>A (chr20-32771891-G-A) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBA1

The NM_006892.4(DNMT3B):c.-6-8427G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.023 in 152,212 control chromosomes in the GnomAD database, including 127 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.023 ( 127 hom., cov: 32)

Consequence

DNMT3B
NM_006892.4 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.59

Publications

3 publications found

Variant links:

Genes affected

DNMT3B (HGNC:2979): (DNA methyltransferase 3 beta) CpG methylation is an epigenetic modification that is important for embryonic development, imprinting, and X-chromosome inactivation. Studies in mice have demonstrated that DNA methylation is required for mammalian development. This gene encodes a DNA methyltransferase which is thought to function in de novo methylation, rather than maintenance methylation. The protein localizes primarily to the nucleus and its expression is developmentally regulated. Mutations in this gene cause the immunodeficiency-centromeric instability-facial anomalies (ICF) syndrome. Eight alternatively spliced transcript variants have been described. The full length sequences of variants 4 and 5 have not been determined. [provided by RefSeq, May 2011]

DNMT3B Gene-Disease associations (from GenCC):

immunodeficiency-centromeric instability-facial anomalies syndrome 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
facioscapulohumeral muscular dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
immunodeficiency-centromeric instability-facial anomalies syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

DNMT3B links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.89).

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0755 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNMT3B	NM_006892.4 link	c.-6-8427G>A		intron_variant	Intron 1 of 22	ENST00000328111.6	NP_008823.1	Q9UBC3-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNMT3B	ENST00000328111.6 link	c.-6-8427G>A		intron_variant	Intron 1 of 22	1	NM_006892.4	ENSP00000328547.2		Q9UBC3-1

Frequencies

GnomAD3 genomes

AF:

0.0229

AC:

3482

AN:

152094

Hom.:

128

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0775

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0113

Gnomad ASJ

AF:

0.00288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.000188

Gnomad MID

AF:

0.0127

Gnomad NFE

AF:

0.000617

Gnomad OTH

AF:

0.0197

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome

AF:

0.0230

AC:

3496

AN:

152212

Hom.:

127

Cov.:

AF XY:

0.0221

AC XY:

1644

AN XY:

74436

show subpopulations

African (AFR)

AF:

0.0777

AC:

3225

AN:

41510

American (AMR)

AF:

0.0111

AC:

170

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00288

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.000415

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.000188

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.0136

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000617

AC:

AN:

68018

Other (OTH)

AF:

0.0194

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

171

342

512

683

854

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

126

168

210

<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:

0.0123

Hom.:

Bravo

AF:

0.0259

Asia WGS

AF:

0.00779

AC:

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.89

CADD

Benign

5.6

(source)

DANN

Benign

0.68

PhyloP100

1.6

Mutation Taster

=100/0

polymorphism (auto)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over