chrX-137566799-GCTGA-G

Variant names:

• chrX-137566799-GCTGA-G
• NM_003413.4:c.109_112delCTGA

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_003413.4(ZIC3):​c.109_112delCTGA​(p.Leu37IlefsTer21) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 24)
• Consequence: ZIC3 NM_003413.4 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 4.76

Genes affected

ZIC3 (HGNC:12874): (Zic family member 3) This gene encodes a member of the ZIC family of C2H2-type zinc finger proteins. This nuclear protein probably functions as a transcription factor in early stages of left-right body axis formation. Mutations in this gene cause X-linked visceral heterotaxy, which includes congenital heart disease and left-right axis defects in organs. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-137566799-GCTGA-G is Pathogenic according to our data. Variant chrX-137566799-GCTGA-G is described in ClinVar as [Pathogenic]. Clinvar id is 2814022.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ZIC3	NM_003413.4	c.109_112delCTGA	p.Leu37IlefsTer21	frameshift_variant	Exon 1 of 3	ENST00000287538.10	NP_003404.1
ZIC3	NM_001330661.1	c.109_112delCTGA	p.Leu37IlefsTer21	frameshift_variant	Exon 1 of 3		NP_001317590.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ZIC3	ENST00000287538.10	c.109_112delCTGA	p.Leu37IlefsTer21	frameshift_variant	Exon 1 of 3	1	NM_003413.4	ENSP00000287538.5
ZIC3	ENST00000370606.3	c.109_112delCTGA	p.Leu37IlefsTer21	frameshift_variant	Exon 1 of 3	5		ENSP00000359638.3

Frequencies

GnomAD3 genomes Cov.: 24

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 24

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Heterotaxy, visceral, 1, X-linked Pathogenic:1

Jan 12, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Leu37Ilefs*21) in the ZIC3 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ZIC3 are known to be pathogenic (PMID: 24123890). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with ZIC3-related conditions. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-136648958;