chr21-44250873-C-A

Variant names:

• chr21-44250873-C-A
• NM_175867.3:c.846G>T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP3_Moderate

The NM_175867.3(DNMT3L):​c.846G>T​(p.Trp282Cys) variant causes a missense change. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 0)
• Consequence: DNMT3L NM_175867.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.92

Genes affected

DNMT3L (HGNC:2980): (DNA methyltransferase 3 like) CpG methylation is an epigenetic modification that is important for embryonic development, imprinting, and X-chromosome inactivation. Studies in mice have demonstrated that DNA methylation is required for mammalian development. This gene encodes a nuclear protein with similarity to DNA methyltransferases, but is not thought to function as a DNA methyltransferase as it does not contain the amino acid residues necessary for methyltransferase activity. However, it does stimulate de novo methylation by DNA cytosine methyltransferase 3 alpha and is thought to be required for the establishment of maternal genomic imprints. This protein also mediates transcriptional repression through interaction with histone deacetylase 1. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2012]

DNMT3L-AS1 (HGNC:40189): (DNMT3L antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.901

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNMT3L	NM_175867.3	c.846G>T	p.Trp282Cys	missense_variant	Exon 10 of 12	ENST00000628202.3	NP_787063.1
DNMT3L	NM_013369.4	c.846G>T	p.Trp282Cys	missense_variant	Exon 10 of 12		NP_037501.2
DNMT3L-AS1	NR_135514.1	n.61C>A		non_coding_transcript_exon_variant	Exon 1 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNMT3L	ENST00000628202.3	c.846G>T	p.Trp282Cys	missense_variant	Exon 10 of 12	1	NM_175867.3	ENSP00000486001.1

Frequencies

GnomAD3 genomes Cov.: 0

GnomAD4 exome Cov.: 0

GnomAD4 genome Cov.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Mar 15, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.846G>T (p.W282C) alteration is located in exon 10 (coding exon 9) of the DNMT3L gene. This alteration results from a G to T substitution at nucleotide position 846, causing the tryptophan (W) at amino acid position 282 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.92
BayesDel_addAF	Uncertain	0.10	D
BayesDel_noAF	Benign	-0.090
CADD	Pathogenic	32
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.86	.;D;.
Eigen	Uncertain	0.60
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.86	D;D;D
M_CAP	Uncertain	0.10	D
MetaRNN	Pathogenic	0.90	D;D;D
MetaSVM	Benign	-0.68	T
MutationAssessor	Pathogenic	3.0	M;M;.
PrimateAI	Uncertain	0.65	T
PROVEAN	Pathogenic	-13	D;.;D
REVEL	Uncertain	0.45
Sift	Pathogenic	0.0	D;.;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.93
MutPred		0.72		Loss of sheet (P = 0.0817);Loss of sheet (P = 0.0817);.;
MVP		0.53
MPC		0.79
ClinPred		0.99	D
GERP RS		2.9
Varity_R		0.95
gMVP		0.90

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr21-45670756;