7-148810334-A-G

Position:

• chr7-148810334-A-G

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 0P and 19B. BP4_Moderate BP6_Very_Strong BP7 BS1 BS2

The NM_004456.5(EZH2):​c.2028T>C​(p.Asn676Asn) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000737 in 1,603,898 control chromosomes in the GnomAD database, including 8 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0042 (5 hom., cov: 32)
  • Exomes 𝑓: 0.00038 (3 hom.)
• Consequence: EZH2 NM_004456.5 splice_region, synonymous
• Scores: Splicing: ADA: 0.0002967
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -0.0740

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 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -19 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.42).
• BP6: Variant 7-148810334-A-G is Benign according to our data. Variant chr7-148810334-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 158581.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-0.074 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00417 (635/152274) while in subpopulation AFR AF= 0.0146 (608/41556). AF 95% confidence interval is 0.0137. There are 5 homozygotes in gnomad4. There are 321 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 635 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EZH2	NM_004456.5	c.2028T>C	p.Asn676Asn	splice_region_variant, synonymous_variant	17/20	ENST00000320356.7	NP_004447.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EZH2	ENST00000320356.7	c.2028T>C	p.Asn676Asn	splice_region_variant, synonymous_variant	17/20	1	NM_004456.5	ENSP00000320147.2

Frequencies

GnomAD3 genomes AF: 0.00416 AC: 633 AN: 152156 Hom.: 5 Cov.: 32

Gnomad AFR AF: 0.0146

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00111

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00287

GnomAD3 exomes AF: 0.00104 AC: 262 AN: 251362 Hom.: 2 AF XY: 0.000692 AC XY: 94 AN XY: 135854

Gnomad AFR exome AF: 0.0147

Gnomad AMR exome AF: 0.000550

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000377 AC: 547 AN: 1451624 Hom.: 3 Cov.: 28 AF XY: 0.000286 AC XY: 206 AN XY: 721448

Gnomad4 AFR exome AF: 0.0135

Gnomad4 AMR exome AF: 0.000538

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000350

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000145

Gnomad4 OTH exome AF: 0.000850

GnomAD4 genome AF: 0.00417 AC: 635 AN: 152274 Hom.: 5 Cov.: 32 AF XY: 0.00431 AC XY: 321 AN XY: 74466

Gnomad4 AFR AF: 0.0146

Gnomad4 AMR AF: 0.00111

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.00284

Alfa AF: 0.000746 Hom.: 0

Bravo AF: 0.00433

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 08, 2013	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Sep 25, 2015	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

not provided Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Apr 19, 2017	- -
Benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jun 01, 2024	EZH2: BP4, BP7, BS1, BS2 -

Weaver syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 22, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.42
CADD	Benign	0.31
DANN	Benign	0.75
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.00030
dbscSNV1_RF	Benign	0.056
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: rs115842196; hg19: chr7-148507426; COSMIC: COSV105883472;