chr19-10136141-G-A

Variant names:

• chr19-10136141-G-A
• rs1555687655
• NM_001130823.3:c.4636C>T

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM2 PM5 PP3_Moderate PP5_Moderate

The NM_001130823.3(DNMT1):​c.4636C>T​(p.Pro1546Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P1546A) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: DNMT1 NM_001130823.3 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.42
• 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: Likely_pathogenic. The variant received 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-10136141-G-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 547912.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.916
• PP5: Variant 19-10136141-G-A is Pathogenic according to our data. Variant chr19-10136141-G-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 1027527.Status of the report is criteria_provided_single_submitter, 1 stars.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNMT1	NM_001130823.3	MANE Select	c.4636C>T	p.Pro1546Ser	missense	Exon 38 of 41	NP_001124295.1
	DNMT1	NM_001318730.2		c.4597C>T	p.Pro1533Ser	missense	Exon 37 of 40	NP_001305659.1
	DNMT1	NM_001379.4		c.4588C>T	p.Pro1530Ser	missense	Exon 37 of 40	NP_001370.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNMT1	ENST00000359526.9	TSL:1 MANE Select	c.4636C>T	p.Pro1546Ser	missense	Exon 38 of 41	ENSP00000352516.3
	DNMT1	ENST00000340748.8	TSL:1	c.4588C>T	p.Pro1530Ser	missense	Exon 37 of 40	ENSP00000345739.3
	DNMT1	ENST00000592705.5	TSL:1	n.*4326C>T		non_coding_transcript_exon	Exon 38 of 41	ENSP00000466657.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Spastic ataxia Pathogenic:1

Jul 12, 2021

Molecular Medicine for Neurodegenerative and Neuromuscular Diseases Unit, IRCCS Fondazione Stella Maris

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Uncertain	0.16	D
BayesDel_noAF	Uncertain	-0.010
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.96	D
Eigen	Pathogenic	0.82
Eigen_PC	Pathogenic	0.75
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.76	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Uncertain	0.65	D
MutationAssessor	Uncertain	2.4	M
PhyloP100		9.4
PrimateAI	Pathogenic	0.82	D
PROVEAN	Pathogenic	-6.9	D
REVEL	Pathogenic	0.74
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.68
MVP		0.90
MPC		2.1
ClinPred		1.0	D
GERP RS		4.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.93
gMVP		0.97
Mutation Taster		=40/60	disease causing

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

Other links and lift over

dbSNP: rs1555687655; hg19: chr19-10246817;