rs1553414406

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1PM2PP5_Moderate

The NM_022552.5(DNMT3A):c.735delT(p.Ala246LeufsTer70) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,608 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

DNMT3A
NM_022552.5 frameshift

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: -1.47

Publications

0 publications found

Variant links:

Genes affected

DNMT3A (HGNC:2978): (DNA methyltransferase 3 alpha) 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 that is thought to function in de novo methylation, rather than maintenance methylation. The protein localizes to the cytoplasm and nucleus and its expression is developmentally regulated. [provided by RefSeq, Mar 2016]

DNMT3A Gene-Disease associations (from GenCC):

Tatton-Brown-Rahman overgrowth syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae), Illumina, Orphanet, ClinGen
Heyn-Sproul-Jackson syndrome
Inheritance: AD Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, ClinGen

DNMT3A links:

Genome browser will be placed here

new If you want to explore the variant's impact on the transcript NM_022552.5, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 12 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 2-25248156-CA-C is Pathogenic according to our data. Variant chr2-25248156-CA-C is described in ClinVar as Pathogenic. ClinVar VariationId is 475178.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_022552.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
DNMT3A	NM_022552.5	MANE Select	c.735delT	p.Ala246LeufsTer70	frameshift	Exon 7 of 23	NP_072046.2
DNMT3A	NM_175629.2		c.735delT	p.Ala246LeufsTer70	frameshift	Exon 7 of 23	NP_783328.1	Q9Y6K1-1
DNMT3A	NM_001320893.1		c.279delT	p.Ala94LeufsTer70	frameshift	Exon 2 of 18	NP_001307822.1	Q9Y6K1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
DNMT3A	ENST00000321117.10	TSL:1 MANE Select	c.735delT	p.Ala246LeufsTer70	frameshift	Exon 7 of 23	ENSP00000324375.5	Q9Y6K1-1
DNMT3A	ENST00000264709.7	TSL:1	c.735delT	p.Ala246LeufsTer70	frameshift	Exon 7 of 23	ENSP00000264709.3	Q9Y6K1-1
DNMT3A	ENST00000380746.8	TSL:1	c.168delT	p.Ala57LeufsTer70	frameshift	Exon 3 of 19	ENSP00000370122.4	Q9Y6K1-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461608

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727104

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33474

American (AMR)

AF:

0.00

AC:

AN:

44678

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86238

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53372

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5692

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111966

Other (OTH)

AF:

0.00

AC:

AN:

60374

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

ClinVar submissions

Significance:Pathogenic

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Tatton-Brown-Rahman overgrowth syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

-1.5

Mutation Taster

=0/200

disease causing (ClinVar)

(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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over