2-144517279-G-GT

Variant names:

• chr2-144517279-G-GT
• rs1553971826
• NM_014795.4:c.71dupA

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_014795.4(ZEB2):​c.71dupA​(p.Asn24LysfsTer6) variant causes a frameshift, splice region change. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: ZEB2 NM_014795.4 frameshift, splice_region
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 5.19
• Publications: 0 publications found

Genes affected

ZEB2 (HGNC:14881): (zinc finger E-box binding homeobox 2) The protein encoded by this gene is a member of the Zfh1 family of 2-handed zinc finger/homeodomain proteins. It is located in the nucleus and functions as a DNA-binding transcriptional repressor that interacts with activated SMADs. Mutations in this gene are associated with Hirschsprung disease/Mowat-Wilson syndrome. Alternatively spliced transcript variants have been found for this gene.[provided by RefSeq, Jan 2010]

ZEB2 Gene-Disease associations (from GenCC):

• Mowat-Wilson syndrome

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

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 351 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 2-144517279-G-GT is Pathogenic according to our data. Variant chr2-144517279-G-GT is described in ClinVar as Pathogenic. ClinVar VariationId is 559637.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ZEB2	NM_014795.4	c.71dupA	p.Asn24LysfsTer6	frameshift_variant, splice_region_variant	Exon 2 of 10	ENST00000627532.3	NP_055610.1
ZEB2	NM_001171653.2	c.71dupA	p.Asn24LysfsTer6	frameshift_variant, splice_region_variant	Exon 2 of 9		NP_001165124.1
ZEB2	NR_033258.2	n.321dupA		splice_region_variant, non_coding_transcript_exon_variant	Exon 2 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ZEB2	ENST00000627532.3	c.71dupA	p.Asn24LysfsTer6	frameshift_variant, splice_region_variant	Exon 2 of 10	1	NM_014795.4	ENSP00000487174.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Mowat-Wilson syndrome Pathogenic:2

Mar 17, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 559637). This sequence change creates a premature translational stop signal (p.Asn24Lysfs*6) in the ZEB2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ZEB2 are known to be pathogenic (PMID: 16053902). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with ZEB2-related conditions. -

Mar 22, 2018

Molecular Genetics Laboratory, BC Children's and BC Women's Hospitals

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		5.2
Mutation Taster		=0/200	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: rs1553971826; hg19: chr2-145274846;