7-148811636-A-G

Variant names:

• chr7-148811636-A-G
• rs267601395
• NM_004456.5:c.1936T>C

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_004456.5(EZH2):​c.1936T>C​(p.Tyr646His) 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. 13/22 in silico tools predict a damaging outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y646N) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: EZH2 NM_004456.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 8.98
• Publications: 214 publications found

Genes affected

EZH2 (HGNC:3527): (enhancer of zeste 2 polycomb repressive complex 2 subunit) This gene encodes a member of the Polycomb-group (PcG) family. PcG family members form multimeric protein complexes, which are involved in maintaining the transcriptional repressive state of genes over successive cell generations. This protein associates with the embryonic ectoderm development protein, the VAV1 oncoprotein, and the X-linked nuclear protein. This protein may play a role in the hematopoietic and central nervous systems. Multiple alternatively splcied transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Feb 2011]

EZH2 Gene-Disease associations (from GenCC):

• Weaver syndrome

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

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.987

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004456.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EZH2	NM_004456.5	MANE Select	c.1936T>C	p.Tyr646His	missense	Exon 16 of 20	NP_004447.2
	EZH2	NM_001203247.2		c.1921T>C	p.Tyr641His	missense	Exon 16 of 20	NP_001190176.1
	EZH2	NM_001203248.2		c.1894T>C	p.Tyr632His	missense	Exon 16 of 20	NP_001190177.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EZH2	ENST00000320356.7	TSL:1 MANE Select	c.1936T>C	p.Tyr646His	missense	Exon 16 of 20	ENSP00000320147.2
	EZH2	ENST00000460911.5	TSL:1	c.1921T>C	p.Tyr641His	missense	Exon 16 of 20	ENSP00000419711.1
	EZH2	ENST00000350995.6	TSL:1	c.1804T>C	p.Tyr602His	missense	Exon 15 of 19	ENSP00000223193.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.52
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.75	D
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.97
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.78	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.4	H
PhyloP100		9.0
PrimateAI	Pathogenic	0.94	D
PROVEAN	Uncertain	-4.3	D
REVEL	Pathogenic	0.91
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.95
MutPred		0.92		Gain of disorder (P = 0.0252)
MVP		0.98
MPC		2.8
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.97
gMVP		0.97
Mutation Taster		=15/85	disease causing (ClinVar)

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: rs267601395; hg19: chr7-148508728; COSMIC: COSV57445793;