rs781764761

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate

The NM_001130823.3(DNMT1):c.1983G>T(p.Glu661Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,614,120 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

DNMT1
NM_001130823.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.51

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 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), DNMT1. . Gene score misZ 4.9903 (greater than the threshold 3.09). Trascript score misZ 7.3302 (greater than threshold 3.09). GenCC has associacion of gene with hereditary sensory neuropathy-deafness-dementia syndrome, autosomal dominant cerebellar ataxia, deafness and narcolepsy.

BP4

Computational evidence support a benign effect (MetaRNN=0.11663622).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
DNMT1	NM_001130823.3 linkuse as main transcript	c.1983G>T	p.Glu661Asp	missense_variant	22/41	ENST00000359526.9	NP_001124295.1
DNMT1	NM_001318730.2 linkuse as main transcript	c.1935G>T	p.Glu645Asp	missense_variant	21/40		NP_001305659.1
DNMT1	NM_001379.4 linkuse as main transcript	c.1935G>T	p.Glu645Asp	missense_variant	21/40		NP_001370.1
DNMT1	NM_001318731.2 linkuse as main transcript	c.1620G>T	p.Glu540Asp	missense_variant	22/41		NP_001305660.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DNMT1	ENST00000359526.9 linkuse as main transcript	c.1983G>T	p.Glu661Asp	missense_variant	22/41	1	NM_001130823.3	ENSP00000352516		P26358-2

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251466

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135910

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461886

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152234

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000986

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hereditary sensory neuropathy-deafness-dementia syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 11, 2024

This sequence change replaces glutamic acid, which is acidic and polar, with aspartic acid, which is acidic and polar, at codon 661 of the DNMT1 protein (p.Glu661Asp). This variant is present in population databases (rs781764761, gnomAD 0.007%). This variant has not been reported in the literature in individuals affected with DNMT1-related conditions. ClinVar contains an entry for this variant (Variation ID: 572640). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt DNMT1 protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.095

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.55

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.43

T;.

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.035

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.80

T;T

M_CAP

Benign

0.0053

MetaRNN

Benign

0.12

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

L;.

MutationTaster

Benign

0.68

N;N;N

PrimateAI

Uncertain

0.52

PROVEAN

Benign

-0.73

N;N

REVEL

Benign

0.025

Sift

Benign

0.20

T;T

Sift4G

Benign

0.55

T;T

Polyphen

0.0020

B;B

Vest4

0.24

MutPred

0.39

Loss of helix (P = 0.0167);.;

MVP

0.47

MPC

0.95

ClinPred

0.17

GERP RS

5.0

RBP_binding_hub_radar

1.0

RBP_regulation_power_radar

2.8

Varity_R

0.042

gMVP

0.66

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over