2-144398716-A-G

Position:

• chr2-144398716-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_014795.4(ZEB2):​c.2471T>C​(p.Met824Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,824 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ZEB2 NM_014795.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:1
• Conservation: PhyloP100: 7.24

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ZEB2. . Gene score misZ 3.9433 (greater than the threshold 3.09). Trascript score misZ 5.6227 (greater than threshold 3.09). GenCC has associacion of gene with Mowat-Wilson syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.23054972).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ZEB2	NM_014795.4	c.2471T>C	p.Met824Thr	missense_variant	8/10	ENST00000627532.3	NP_055610.1
ZEB2	NM_001171653.2	c.2399T>C	p.Met800Thr	missense_variant	7/9		NP_001165124.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ZEB2	ENST00000627532.3	c.2471T>C	p.Met824Thr	missense_variant	8/10	1	NM_014795.4	ENSP00000487174	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461824 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727216

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Mowat-Wilson syndrome Uncertain:2 Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Nov 07, 2021	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	May 04, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Mar 31, 2022	- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jul 07, 2017

A variant of uncertain significance has been identified in the ZEB2 gene. The M824T variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. The M824T variant is not observed in large population cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). The M824T variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. However, this substitution occurs at a position where amino acids with similar properties to Methionine are tolerated across species. Additionally, missense variants in the ZEB2 gene are rare and have been identified in less than 2% of patients with Mowat-Wilson syndrome (Garavelli et al., 2009). In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. Based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.25
BayesDel_addAF	Uncertain	0.031	T
BayesDel_noAF	Benign	-0.19
CADD	Benign	23
DANN	Benign	0.81
DEOGEN2	Benign	0.0090	T;T;T;T;T;.;T;T;T;T;.;T;T
Eigen	Benign	0.0082
Eigen_PC	Benign	0.20
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.82	.;.;.;.;T;T;T;.;.;T;T;T;T
M_CAP	Benign	0.0094	T
MetaRNN	Benign	0.23	T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.4	.;.;.;.;.;.;.;L;L;.;.;L;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.80	T
PROVEAN	Benign	-0.51	.;.;.;.;.;.;.;.;N;.;N;N;.
REVEL	Benign	0.19
Sift	Uncertain	0.020	.;.;.;.;.;.;.;.;D;.;D;D;.
Sift4G	Benign	0.74	.;.;.;.;.;.;.;T;T;.;T;T;T
Polyphen		0.21	.;.;.;.;.;.;.;B;B;.;.;B;B
Vest4		0.78, 0.80, 0.85, 0.81, 0.77
MutPred		0.23		.;.;.;.;.;.;.;Gain of phosphorylation at M824 (P = 0.0391);Gain of phosphorylation at M824 (P = 0.0391);Gain of phosphorylation at M824 (P = 0.0391);.;Gain of phosphorylation at M824 (P = 0.0391);.;
MVP		0.23
MPC		0.83
ClinPred		0.38	T
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.33
gMVP		0.29

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: rs1553961536; hg19: chr2-145156283;