21-44249056-C-T

Position:

• chr21-44249056-C-T

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_Moderate BP6_Moderate

The NM_175867.3(DNMT3L):​c.965G>A​(p.Arg322His) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: not found (cov: 0)
• Consequence: DNMT3L NM_175867.3 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.717

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]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.074493915).
• BP6: Variant 21-44249056-C-T is Benign according to our data. Variant chr21-44249056-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 2222116.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DNMT3L	NM_175867.3	c.965G>A	p.Arg322His	missense_variant	11/12	ENST00000628202.3	NP_787063.1
DNMT3L	NM_013369.4	c.965G>A	p.Arg322His	missense_variant	11/12		NP_037501.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DNMT3L	ENST00000628202.3	c.965G>A	p.Arg322His	missense_variant	11/12	1	NM_175867.3	ENSP00000486001	A2
DNMT3L	ENST00000270172.7	c.965G>A	p.Arg322His	missense_variant	11/12	1		ENSP00000270172	P4
DNMT3L	ENST00000436357.5	n.349G>A		non_coding_transcript_exon_variant	3/4	3

Frequencies

GnomAD3 genomes Cov.: 0

GnomAD3 exomes AF: 0.0000524 AC: 13 AN: 247864 Hom.: 0 AF XY: 0.0000298 AC XY: 4 AN XY: 134188

Gnomad AFR exome AF: 0.0000630

Gnomad AMR exome AF: 0.000204

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000991

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000179

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 0

GnomAD4 genome Cov.: 0

Alfa AF: 0.000111 Hom.: 0

ExAC AF: 0.0000412 AC: 5

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 12, 2021

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Benign	-0.44	T
BayesDel_noAF	Benign	-0.59
CADD	Benign	0.24
DANN	Benign	0.90
DEOGEN2	Benign	0.11	.;T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.078	N
LIST_S2	Benign	0.59	T;T
M_CAP	Benign	0.0029	T
MetaRNN	Benign	0.074	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.49	N;N
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.22	T
PROVEAN	Benign	2.3	N;.
REVEL	Benign	0.064
Sift	Benign	0.22	T;.
Sift4G	Benign	0.33	T;T
Polyphen		0.0050	B;B
Vest4		0.22
MutPred		0.38		Loss of MoRF binding (P = 0.008);Loss of MoRF binding (P = 0.008);
MVP		0.23
MPC		0.18
ClinPred		0.026	T
GERP RS		-0.39
Varity_R		0.041
gMVP		0.47

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: rs755846743; hg19: chr21-45668939;