chr19-10155017-T-C

Variant names:

• chr19-10155017-T-C
• rs199473690
• NM_001130823.3:c.1532A>G

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PM1 PM2 PM5 PP3_Moderate PP5_Very_Strong

The NM_001130823.3(DNMT1):​c.1532A>G​(p.Tyr511Cys) 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. Y511H) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DNMT1 NM_001130823.3 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6 U:2
• Conservation: PhyloP100: 7.99
• Publications: 22 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: 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)

ACMG classification

Our verdict: Pathogenic. The variant received 16 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 4 uncertain in NM_001130823.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-10155018-A-G is described in ClinVar as Pathogenic. ClinVar VariationId is 162188.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.934
• PP5: Variant 19-10155017-T-C is Pathogenic according to our data. Variant chr19-10155017-T-C is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 29682.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNMT1	NM_001130823.3	MANE Select	c.1532A>G	p.Tyr511Cys	missense	Exon 20 of 41	NP_001124295.1	P26358-2
	DNMT1	NM_001318730.2		c.1484A>G	p.Tyr495Cys	missense	Exon 19 of 40	NP_001305659.1
	DNMT1	NM_001379.4		c.1484A>G	p.Tyr495Cys	missense	Exon 19 of 40	NP_001370.1	P26358-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNMT1	ENST00000359526.9	TSL:1 MANE Select	c.1532A>G	p.Tyr511Cys	missense	Exon 20 of 41	ENSP00000352516.3	P26358-2
	DNMT1	ENST00000340748.8	TSL:1	c.1484A>G	p.Tyr495Cys	missense	Exon 19 of 40	ENSP00000345739.3	P26358-1
	DNMT1	ENST00000592705.5	TSL:1	n.*1222A>G		non_coding_transcript_exon	Exon 20 of 41	ENSP00000466657.1	K7EMU8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 36

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
4	1	-	Hereditary sensory neuropathy-deafness-dementia syndrome (5)
1	-	-	Autosomal dominant cerebellar ataxia, deafness and narcolepsy (1)
-	1	-	Charcot-Marie-Tooth disease (1)
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.51	D
BayesDel_noAF	Pathogenic	0.50
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.95	D
Eigen	Pathogenic	0.71
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.81	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.8	M
PhyloP100		8.0
PrimateAI	Uncertain	0.68	T
PROVEAN	Pathogenic	-8.1	D
REVEL	Pathogenic	0.87
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.90
MutPred		0.55		Loss of phosphorylation at Y495 (P = 0.0337)
MVP		0.97
MPC		2.4
ClinPred		1.0	D
GERP RS		6.1
RBP_binding_hub_radar		0.97
RBP_regulation_power_radar		2.8
Varity_R		0.91
gMVP		1.0
Mutation Taster		=2/98	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs199473690; hg19: chr19-10265693;