rs147118268

Variant names:

• chr19-10133672-C-A
• rs147118268
• NM_001130823.3:c.4894G>T

Your query was ambiguous. Multiple possible variants found:

• chr19-10133672-C-A
• chr19-10133672-C-G
• chr19-10133672-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001130823.3(DNMT1):​c.4894G>T​(p.Asp1632Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000691 in 1,447,220 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D1632H) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: DNMT1 NM_001130823.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.68
• Publications: 0 publications found

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: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Genomics England PanelApp, PanelApp Australia, Orphanet, Labcorp Genetics (formerly Invitae)
• hereditary sensory neuropathy-deafness-dementia syndrome

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3145755).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNMT1	NM_001130823.3	c.4894G>T	p.Asp1632Tyr	missense_variant	Exon 41 of 41	ENST00000359526.9	NP_001124295.1
DNMT1	NM_001318730.2	c.4855G>T	p.Asp1619Tyr	missense_variant	Exon 40 of 40		NP_001305659.1
DNMT1	NM_001379.4	c.4846G>T	p.Asp1616Tyr	missense_variant	Exon 40 of 40		NP_001370.1
DNMT1	NM_001318731.2	c.4531G>T	p.Asp1511Tyr	missense_variant	Exon 41 of 41		NP_001305660.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNMT1	ENST00000359526.9	c.4894G>T	p.Asp1632Tyr	missense_variant	Exon 41 of 41	1	NM_001130823.3	ENSP00000352516.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.91e-7 AC: 1 AN: 1447220 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 718424

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

African (AFR) AF: 0.0000302 AC: 1 AN: 33120

American (AMR) AF: 0.00 AC: 0 AN: 43200

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25800

East Asian (EAS) AF: 0.00 AC: 0 AN: 39186

South Asian (SAS) AF: 0.00 AC: 0 AN: 83676

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52536

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5694

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1104218

Other (OTH) AF: 0.00 AC: 0 AN: 59790

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Uncertain	0.041	T
BayesDel_noAF	Benign	-0.18
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.49	T;.
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.30
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.72	T;T
M_CAP	Benign	0.040	D
MetaRNN	Benign	0.31	T;T
MetaSVM	Benign	-0.94	T
MutationAssessor	Benign	1.1	L;.
PhyloP100		2.7
PrimateAI	Benign	0.44	T
PROVEAN	Benign	-1.6	N;N
REVEL	Benign	0.16
Sift	Pathogenic	0.0	D;D
Sift4G	Uncertain	0.0040	D;D
Polyphen		0.97	D;D
Vest4		0.38
MVP		0.75
MPC		1.2
ClinPred		0.90	D
GERP RS		3.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.27
gMVP		0.31
Mutation Taster		=78/22	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs147118268; hg19: chr19-10244348;