7-148811635-T-A

Position:

• chr7-148811635-T-A

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM1 PM2 PM5 PP2 PP3_Strong PP5

The NM_004456.5(EZH2):​c.1937A>T​(p.Tyr646Phe) 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 Likely pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y646H) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: EZH2 NM_004456.5 missense
• Clinical Significance: Likely pathogenic no assertion criteria provided P:3
• Conservation: PhyloP100: 7.72

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]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PM1: In a strand (size 4) in uniprot entity EZH2_HUMAN there are 7 pathogenic changes around while only 0 benign (100%) in NM_004456.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr7-148811636-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 76769.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), EZH2. . Gene score misZ 4.6808 (greater than the threshold 3.09). Trascript score misZ 5.1095 (greater than threshold 3.09). GenCC has associacion of gene with Weaver syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.966
• PP5: Variant 7-148811635-T-A is Pathogenic according to our data. Variant chr7-148811635-T-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 76768.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EZH2	NM_004456.5	c.1937A>T	p.Tyr646Phe	missense_variant	16/20	ENST00000320356.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EZH2	ENST00000320356.7	c.1937A>T	p.Tyr646Phe	missense_variant	16/20	1	NM_004456.5	P4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3

Revision: no assertion criteria provided

Submissions by phenotype

Lymphoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

Dec 26, 2014

- -

Non-Hodgkin lymphoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Malignant melanoma of skin Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Pathogenic	0.14
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.57	.;D;.;.;.;.
Eigen	Pathogenic	0.88
Eigen_PC	Pathogenic	0.83
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	.;D;D;D;D;D
M_CAP	Pathogenic	0.52	D
MetaRNN	Pathogenic	0.97	D;D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	3.2	.;M;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D
PrimateAI	Pathogenic	0.91	D
PROVEAN	Uncertain	-3.5	D;D;D;D;D;D
REVEL	Pathogenic	0.85
Sift	Uncertain	0.0060	D;D;D;D;D;D
Sift4G	Uncertain	0.010	D;D;D;D;D;D
Polyphen		1.0	D;D;D;P;D;D
Vest4		0.71
MutPred		0.94		.;Gain of sheet (P = 0.1945);.;.;.;.;
MVP		0.93
MPC		2.4
ClinPred		0.99	D
GERP RS		5.6
Varity_R		0.88
gMVP		0.90

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: rs267601394; hg19: chr7-148508727; COSMIC: COSV57445929;