Genetic Variant NM_001130823.3:c.1944C>T (chr19-10154368-G-A) – ACMG Classification: Benign (-19 pts)

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_001130823.3(DNMT1):c.1944C>T(p.Phe648Phe) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00403 in 1,614,236 control chromosomes in the GnomAD database, including 42 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0029 ( 4 hom., cov: 32)

Exomes 𝑓: 0.0042 ( 38 hom. )

Consequence

DNMT1
NM_001130823.3 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: 3.07

Publications

4 publications found

Variant links:

Genes affected

DNMT1 (HGNC:2976): (DNA methyltransferase 1) This gene encodes an enzyme that transfers methyl groups to cytosine nucleotides of genomic DNA. This protein is the major enzyme responsible for maintaining methylation patterns following DNA replication and shows a preference for hemi-methylated DNA. Methylation of DNA is an important component of mammalian epigenetic gene regulation. Aberrant methylation patterns are found in human tumors and associated with developmental abnormalities. Variation in this gene has been associated with cerebellar ataxia, deafness, and narcolepsy, and neuropathy, hereditary sensory, type IE. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

DNMT1 Gene-Disease associations (from GenCC):

autosomal dominant cerebellar ataxia, deafness and narcolepsy
Inheritance: Unknown, AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Genomics England PanelApp, Orphanet, Labcorp Genetics (formerly Invitae)
hereditary sensory neuropathy-deafness-dementia syndrome
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

DNMT1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.32).

BP6

Variant 19-10154368-G-A is Benign according to our data. Variant chr19-10154368-G-A is described in ClinVar as Benign. ClinVar VariationId is 327907.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=3.07 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. GnomAdExome4 allele frequency = 0.00415 (6072/1461894) while in subpopulation SAS AF = 0.0172 (1481/86258). AF 95% confidence interval is 0.0164. There are 38 homozygotes in GnomAdExome4. There are 3283 alleles in the male GnomAdExome4 subpopulation. Median coverage is 31. This position passed quality control check.

BS2

High AC in GnomAd4 at 436 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001130823.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
DNMT1	NM_001130823.3	MANE Select	c.1944C>T	p.Phe648Phe	synonymous	Exon 22 of 41	NP_001124295.1	P26358-2
DNMT1	NM_001318730.2		c.1896C>T	p.Phe632Phe	synonymous	Exon 21 of 40	NP_001305659.1
DNMT1	NM_001379.4		c.1896C>T	p.Phe632Phe	synonymous	Exon 21 of 40	NP_001370.1	P26358-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
DNMT1	ENST00000359526.9	TSL:1 MANE Select	c.1944C>T	p.Phe648Phe	synonymous	Exon 22 of 41	ENSP00000352516.3	P26358-2
DNMT1	ENST00000340748.8	TSL:1	c.1896C>T	p.Phe632Phe	synonymous	Exon 21 of 40	ENSP00000345739.3	P26358-1
DNMT1	ENST00000592705.5	TSL:1	n.*1634C>T		non_coding_transcript_exon	Exon 22 of 41	ENSP00000466657.1	K7EMU8

Frequencies

GnomAD3 genomes

AF:

0.00286

AC:

436

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000916

Gnomad AMI

AF:

0.00110

Gnomad AMR

AF:

0.00347

Gnomad ASJ

AF:

0.00288

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.0149

Gnomad FIN

AF:

0.00104

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.00359

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.00456

AC:

1146

AN:

251482

AF XY:

0.00517

show subpopulations

Gnomad AFR exome

AF:

0.000861

Gnomad AMR exome

AF:

0.000925

Gnomad ASJ exome

AF:

0.00258

Gnomad EAS exome

AF:

0.000109

Gnomad FIN exome

AF:

0.00134

Gnomad NFE exome

AF:

0.00408

Gnomad OTH exome

AF:

0.00342

GnomAD4 exome

AF:

0.00415

AC:

6072

AN:

1461894

Hom.:

Cov.:

AF XY:

0.00451

AC XY:

3283

AN XY:

727248

show subpopulations

African (AFR)

AF:

0.000747

AC:

AN:

33480

American (AMR)

AF:

0.000961

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00283

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39700

South Asian (SAS)

AF:

0.0172

AC:

1481

AN:

86258

European-Finnish (FIN)

AF:

0.00168

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00364

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00367

AC:

4076

AN:

1112012

Other (OTH)

AF:

0.00430

AC:

260

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

431

862

1292

1723

2154

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

154

308

462

616

770

<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:

0.00286

AC:

436

AN:

152342

Hom.:

Cov.:

AF XY:

0.00298

AC XY:

222

AN XY:

74482

show subpopulations

African (AFR)

AF:

0.000914

AC:

AN:

41586

American (AMR)

AF:

0.00346

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00288

AC:

AN:

3472

East Asian (EAS)

AF:

0.000193

AC:

AN:

5180

South Asian (SAS)

AF:

0.0149

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00104

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00359

AC:

244

AN:

68032

Other (OTH)

AF:

0.00236

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

Heterozygous variant carriers

104

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00326

Hom.:

Bravo

AF:

0.00259

Asia WGS

AF:

0.00520

AC:

AN:

3478

EpiCase

AF:

0.00333

EpiControl

AF:

0.00367

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (4)

Hereditary sensory neuropathy-deafness-dementia syndrome (2)

not provided (2)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.32

CADD

Benign

(source)

DANN

Benign

0.71

PhyloP100

3.1

Mutation Taster

=97/3

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.14

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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