rs17123655

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_006892.4(DNMT3B):​c.1878C>T​(p.Asn626Asn) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0044 in 1,614,140 control chromosomes in the GnomAD database, including 263 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.023 ( 127 hom., cov: 32)
Exomes 𝑓: 0.0025 ( 136 hom. )

Consequence

DNMT3B
NM_006892.4 synonymous

Scores

2

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: -1.18
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]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.59).
BP6
Variant 20-32800271-C-T is Benign according to our data. Variant chr20-32800271-C-T is described in ClinVar as [Benign]. Clinvar id is 338178.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
BP7
Synonymous conserved (PhyloP=-1.18 with no splicing effect.
BA1
GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0754 is higher than 0.05.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
DNMT3BNM_006892.4 linkuse as main transcriptc.1878C>T p.Asn626Asn synonymous_variant 17/23 ENST00000328111.6 NP_008823.1 Q9UBC3-1

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
DNMT3BENST00000328111.6 linkuse as main transcriptc.1878C>T p.Asn626Asn synonymous_variant 17/231 NM_006892.4 ENSP00000328547.2 Q9UBC3-1

Frequencies

GnomAD3 genomes
AF:
0.0228
AC:
3469
AN:
152132
Hom.:
128
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.0775
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.0111
Gnomad ASJ
AF:
0.00288
Gnomad EAS
AF:
0.00
Gnomad SAS
AF:
0.000621
Gnomad FIN
AF:
0.00
Gnomad MID
AF:
0.0127
Gnomad NFE
AF:
0.000470
Gnomad OTH
AF:
0.0186
GnomAD3 exomes
AF:
0.00633
AC:
1593
AN:
251490
Hom.:
56
AF XY:
0.00451
AC XY:
613
AN XY:
135922
show subpopulations
Gnomad AFR exome
AF:
0.0818
Gnomad AMR exome
AF:
0.00457
Gnomad ASJ exome
AF:
0.00198
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.000327
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.000492
Gnomad OTH exome
AF:
0.00309
GnomAD4 exome
AF:
0.00248
AC:
3620
AN:
1461890
Hom.:
136
Cov.:
35
AF XY:
0.00216
AC XY:
1570
AN XY:
727246
show subpopulations
Gnomad4 AFR exome
AF:
0.0802
Gnomad4 AMR exome
AF:
0.00483
Gnomad4 ASJ exome
AF:
0.00191
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.000348
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.000237
Gnomad4 OTH exome
AF:
0.00556
GnomAD4 genome
AF:
0.0229
AC:
3480
AN:
152250
Hom.:
127
Cov.:
32
AF XY:
0.0219
AC XY:
1627
AN XY:
74430
show subpopulations
Gnomad4 AFR
AF:
0.0776
Gnomad4 AMR
AF:
0.0110
Gnomad4 ASJ
AF:
0.00288
Gnomad4 EAS
AF:
0.00
Gnomad4 SAS
AF:
0.000622
Gnomad4 FIN
AF:
0.00
Gnomad4 NFE
AF:
0.000470
Gnomad4 OTH
AF:
0.0184
Alfa
AF:
0.0122
Hom.:
50
Bravo
AF:
0.0257
Asia WGS
AF:
0.00722
AC:
25
AN:
3478
EpiCase
AF:
0.000327
EpiControl
AF:
0.000711

ClinVar

Significance: Benign
Submissions summary: Benign:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

Immunodeficiency-centromeric instability-facial anomalies syndrome 1 Benign:1
Benign, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 13, 2018This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
not provided Benign:1
Benign, criteria provided, single submitternot providedBreakthrough Genomics, Breakthrough Genomics-- -
Centromeric instability of chromosomes 1,9 and 16 and immunodeficiency Benign:1
Benign, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpJan 31, 2024- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
-0.59
CADD
Benign
8.8
DANN
Benign
0.74

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.20
Details are displayed if max score is > 0.2
DS_DG_spliceai
0.20
Position offset: 3

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.

Other links and lift over

dbSNP: rs17123655; hg19: chr20-31388077; API