21-44250927-G-T

Position:

• chr21-44250927-G-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_175867.3(DNMT3L):​c.792C>A​(p.His264Gln) variant causes a missense change. In-silico tool predicts a benign 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: 5.02

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 Likely_benign. Variant got -1 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.37501496).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DNMT3L	NM_175867.3	c.792C>A	p.His264Gln	missense_variant	10/12	ENST00000628202.3	NP_787063.1
DNMT3L-AS1	NR_135514.1	n.115G>T		non_coding_transcript_exon_variant	1/2
DNMT3L	NM_013369.4	c.792C>A	p.His264Gln	missense_variant	10/12		NP_037501.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DNMT3L	ENST00000628202.3	c.792C>A	p.His264Gln	missense_variant	10/12	1	NM_175867.3	ENSP00000486001	A2
DNMT3L-AS1	ENST00000442785.1	n.115G>T		non_coding_transcript_exon_variant	1/2	3

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

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 02, 2021

The c.792C>A (p.H264Q) alteration is located in exon 10 (coding exon 9) of the DNMT3L gene. This alteration results from a C to A substitution at nucleotide position 792, causing the histidine (H) at amino acid position 264 to be replaced by a glutamine (Q). 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	Uncertain	0.41
BayesDel_addAF	Benign	-0.078	T
BayesDel_noAF	Benign	-0.35
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.70	.;D;.
Eigen	Uncertain	0.21
Eigen_PC	Benign	0.19
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.61	T;T;T
M_CAP	Benign	0.030	D
MetaRNN	Benign	0.38	T;T;T
MetaSVM	Benign	-0.61	T
MutationAssessor	Uncertain	2.6	M;M;.
MutationTaster	Benign	0.90	D;D
PrimateAI	Uncertain	0.56	T
PROVEAN	Uncertain	-4.3	D;.;D
REVEL	Benign	0.20
Sift	Uncertain	0.0040	D;.;D
Sift4G	Uncertain	0.016	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.40
MutPred		0.54		Loss of sheet (P = 0.0181);Loss of sheet (P = 0.0181);.;
MVP		0.46
MPC		0.53
ClinPred		0.98	D
GERP RS		2.9
Varity_R		0.74
gMVP		0.50

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: chr21-45670810;