6-31881061-C-A

Position:

• chr6-31881061-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP3 PP5_Moderate

The NM_006709.5(EHMT2):​c.3229G>T​(p.Ala1077Ser) 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 Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: EHMT2 NM_006709.5 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.39

Genes affected

EHMT2 (HGNC:14129): (euchromatic histone lysine methyltransferase 2) This gene encodes a methyltransferase that methylates lysine residues of histone H3. Methylation of H3 at lysine 9 by this protein results in recruitment of additional epigenetic regulators and repression of transcription. This gene was initially thought to be two different genes, NG36 and G9a, adjacent to each other in the HLA locus. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

EHMT2-AS1 (HGNC:39751): (EHMT2 and SLC44A4 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.76
• PP5: Variant 6-31881061-C-A is Pathogenic according to our data. Variant chr6-31881061-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 2687731.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EHMT2	NM_006709.5	c.3229G>T	p.Ala1077Ser	missense_variant	26/28	ENST00000375537.9
EHMT2-AS1	NR_174947.1	n.814C>A		splice_region_variant, non_coding_transcript_exon_variant	3/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EHMT2	ENST00000375537.9	c.3229G>T	p.Ala1077Ser	missense_variant	26/28	1	NM_006709.5
EHMT2-AS1	ENST00000642849.1	n.814C>A		splice_region_variant, non_coding_transcript_exon_variant	3/5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Kleefstra-like syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing;in vitro

Spanish Undiagnosed Rare Disease Program-IIER, Instituto de Salud Carlos III

-

Pediatric patient with a Kleefstra-overlapping phenotype and a single base de novo substitution in EHMT2 that causes the amino acid change p.Ala1077Ser in the catalytic SET domain. This change causes a reduction in the affinity of the catalytic domain for histone H3 tail and in the activity of the enzyme by three- to five-fold. DNA methylation, histone methylation and gene expression profiles suggest a significant overlap between the EHMT2 p.Ala1077Ser variant and Kleefstra Syndrome. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.030
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Benign	0.39	.;.;.;T
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.77
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Uncertain	0.25	D
MetaRNN	Pathogenic	0.76	D;D;D;D
MetaSVM	Uncertain	0.60	D
MutationAssessor	Uncertain	2.3	.;.;.;M
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.79	T
PROVEAN	Uncertain	-2.8	D;D;D;D
REVEL	Pathogenic	0.77
Sift	Uncertain	0.0090	D;D;D;D
Sift4G	Benign	0.071	T;T;T;T
Polyphen		0.98, 0.98, 1.0	.;D;D;D
Vest4		0.53
MutPred		0.65		.;Gain of phosphorylation at A1100 (P = 0.032);.;.;
MVP		0.96
MPC		2.0
ClinPred		0.99	D
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.85
gMVP		0.82

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: chr6-31848838;