19-10142075-C-T

Position:

chr19-10142075-C-T

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 1P and 9B. PP2BP4_StrongBP6BS2

The NM_001130823.3(DNMT1):c.3262G>A(p.Val1088Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000124 in 1,611,146 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

DNMT1
NM_001130823.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:2O:1

Conservation

PhyloP100: 0.556

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 Benign. Variant got -8 ACMG points.

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=0.06393492).

BP6

Variant 19-10142075-C-T is Benign according to our data. Variant chr19-10142075-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 472269.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, not_provided=1, Uncertain_significance=1}. Variant chr19-10142075-C-T is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd4 at 11 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
DNMT1	NM_001130823.3 linkuse as main transcript	c.3262G>A	p.Val1088Ile	missense_variant	30/41	ENST00000359526.9	NP_001124295.1
DNMT1	NM_001318730.2 linkuse as main transcript	c.3214G>A	p.Val1072Ile	missense_variant	29/40		NP_001305659.1
DNMT1	NM_001379.4 linkuse as main transcript	c.3214G>A	p.Val1072Ile	missense_variant	29/40		NP_001370.1
DNMT1	NM_001318731.2 linkuse as main transcript	c.2899G>A	p.Val967Ile	missense_variant	30/41		NP_001305660.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DNMT1	ENST00000359526.9 linkuse as main transcript	c.3262G>A	p.Val1088Ile	missense_variant	30/41	1	NM_001130823.3	ENSP00000352516		P26358-2

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152174

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:

0.000132

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000598

AC:

AN:

250652

Hom.:

AF XY:

0.0000738

AC XY:

AN XY:

135562

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

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:

0.000124

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000130

AC:

189

AN:

1458854

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

725080

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000253

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000160

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.0000722

AC:

AN:

152292

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74464

show subpopulations

Gnomad4 AFR

AF:

0.0000481

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:

0.000132

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000658

Hom.:

Bravo

AF:

0.000106

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:2Other:1

Revision: criteria provided, conflicting classifications

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

Dec 26, 2023

This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 1088 of the DNMT1 protein (p.Val1088Ile). This variant is present in population databases (rs776461147, gnomAD 0.01%), and has an allele count higher than expected for a pathogenic variant. 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: 472269). 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. -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 14, 2020

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Jun 19, 2019

- -

Hereditary sensory neuropathy-deafness-dementia syndrome;C3807295:Autosomal dominant cerebellar ataxia, deafness and narcolepsy

Other:1

not provided, no classification provided

phenotyping only

GenomeConnect - Invitae Patient Insights Network

Variant interpreted as Uncertain significance and reported on 08-13-2020 by Invitae. GenomeConnect-Invitae Patient Insights Network assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. Registry team members make no attempt to reinterpret the clinical significance of the variant. Phenotypic details are available under supporting information. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.065

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Benign

0.75

DEOGEN2

Uncertain

0.53

D;.

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.15

LIST_S2

Benign

0.81

T;T

M_CAP

Benign

0.016

MetaRNN

Benign

0.064

T;T

MetaSVM

Benign

-0.77

MutationAssessor

Benign

-0.10

N;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.28

PROVEAN

Benign

-0.11

N;N

REVEL

Benign

0.16

Sift

Benign

0.90

T;T

Sift4G

Benign

1.0

T;T

Polyphen

0.0060

B;B

Vest4

0.10

MVP

0.48

MPC

0.84

ClinPred

0.0099

GERP RS

-7.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

Varity_R

0.043

gMVP

0.076

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.13

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