NM_024757.5:c.470G>A

Variant names:

• chr9-137717010-G-A
• rs1554846686
• NM_024757.5:c.470G>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_024757.5(EHMT1):​c.470G>A​(p.Gly157Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G157V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: EHMT1 NM_024757.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.65
• Publications: 0 publications found

Genes affected

EHMT1 (HGNC:24650): (euchromatic histone lysine methyltransferase 1) The protein encoded by this gene is a histone methyltransferase that methylates the lysine-9 position of histone H3. This action marks the genomic region packaged with these methylated histones for transcriptional repression. This protein may be involved in the silencing of MYC- and E2F-responsive genes and therefore could play a role in the G0/G1 cell cycle transition. Defects in this gene are a cause of chromosome 9q subtelomeric deletion syndrome (9q-syndrome, also known as Kleefstra syndrome). Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2017]

EHMT1 Gene-Disease associations (from GenCC):

• Kleefstra syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• Kleefstra syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.34417892).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024757.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EHMT1	NM_024757.5	MANE Select	c.470G>A	p.Gly157Glu	missense	Exon 3 of 27	NP_079033.4
	EHMT1	NM_001354263.2		c.470G>A	p.Gly157Glu	missense	Exon 3 of 27	NP_001341192.1
	EHMT1	NM_001354259.2		c.377G>A	p.Gly126Glu	missense	Exon 2 of 16	NP_001341188.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EHMT1	ENST00000460843.6	TSL:5 MANE Select	c.470G>A	p.Gly157Glu	missense	Exon 3 of 27	ENSP00000417980.1
	EHMT1	ENST00000462484.5	TSL:1	c.470G>A	p.Gly157Glu	missense	Exon 3 of 16	ENSP00000417328.1
	EHMT1	ENST00000896765.1		c.470G>A	p.Gly157Glu	missense	Exon 3 of 28	ENSP00000566824.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Kleefstra syndrome 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Uncertain	0.028	T
BayesDel_noAF	Benign	-0.20
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.12	T
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.52
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.93	D
M_CAP	Pathogenic	0.33	D
MetaRNN	Benign	0.34	T
MetaSVM	Uncertain	0.15	D
MutationAssessor	Uncertain	2.1	M
PhyloP100		4.7
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.20
Sift	Uncertain	0.010	D
Sift4G	Uncertain	0.018	D
Polyphen		1.0	D
Vest4		0.55
MutPred		0.17		Gain of ubiquitination at K153 (P = 0.0192)
MVP		0.55
MPC		0.28
ClinPred		0.85	D
GERP RS		5.1
Varity_R		0.094
gMVP		0.093
Mutation Taster		=82/18	polymorphism

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

Other links and lift over

dbSNP: rs1554846686; hg19: chr9-140611462;