19-10133380-A-G

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4 BP6_Moderate BS2

The NM_001130823.3(DNMT1):c.*287T>C variant causes a 3 prime UTR change. The variant allele was found at a frequency of 0.000354 in 502,820 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.00088 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00013 (0 hom.)
• Consequence: DNMT1 NM_001130823.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 4.69

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]

ACMG classification

Verdict is Benign. Variant got -7 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.09).
• BP6: Variant 19-10133380-A-G is Benign according to our data. Variant chr19-10133380-A-G is described in ClinVar as [Benign]. Clinvar id is 891484.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High AC in GnomAd at 134 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DNMT1	NM_001130823.3	c.*287T>C		3_prime_UTR_variant	41/41	ENST00000359526.9
DNMT1	NM_001318730.2	c.*287T>C		3_prime_UTR_variant	40/40
DNMT1	NM_001318731.2	c.*287T>C		3_prime_UTR_variant	41/41
DNMT1	NM_001379.4	c.*287T>C		3_prime_UTR_variant	40/40

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DNMT1	ENST00000359526.9	c.*287T>C		3_prime_UTR_variant	41/41	1	NM_001130823.3

Frequencies

GnomAD3 genomes AF: 0.000880 AC: 134 AN: 152250 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00316

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000196

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

GnomAD4 exome AF: 0.000126 AC: 44 AN: 350452 Hom.: 0 Cov.: 2 AF XY: 0.0000874 AC XY: 16 AN XY: 183158

Gnomad4 AFR exome AF: 0.00328

Gnomad4 AMR exome AF: 0.000288

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000290

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.000145

GnomAD4 genome AF: 0.000879 AC: 134 AN: 152368 Hom.: 0 Cov.: 32 AF XY: 0.000939 AC XY: 70 AN XY: 74510

Gnomad4 AFR AF: 0.00315

Gnomad4 AMR AF: 0.000196

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: 0.000854 Hom.: 0

Bravo AF: 0.00107

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary sensory neuropathy-deafness-dementia syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.090
Cadd	Benign	16
Dann	Benign	0.89
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0

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

Other links and lift over

dbSNP: rs189422259; hg19: chr19-10244056;