chrX-137568910-C-A

Position:

• chrX-137568910-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_003413.4(ZIC3):​c.1069C>A​(p.Pro357Thr) 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 21)
• Consequence: ZIC3 NM_003413.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.85

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]

ZIC3 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.917

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ZIC3	NM_003413.4	c.1069C>A	p.Pro357Thr	missense_variant	2/3	ENST00000287538.10	NP_003404.1
ZIC3	NM_001330661.1	c.1069C>A	p.Pro357Thr	missense_variant	2/3		NP_001317590.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ZIC3	ENST00000287538.10	c.1069C>A	p.Pro357Thr	missense_variant	2/3	1	NM_003413.4	ENSP00000287538.5
ZIC3	ENST00000370606.3	c.1069C>A	p.Pro357Thr	missense_variant	2/3	5		ENSP00000359638.3
ZIC3	ENST00000478471.1	n.106C>A		non_coding_transcript_exon_variant	1/2	2

Frequencies

GnomAD3 genomes Cov.: 21

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 21

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

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

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 22, 2017

This sequence change replaces proline with threonine at codon 357 of the ZIC3 protein (p.Pro357Thr). The proline residue is highly conserved and there is a small physicochemical difference between proline and threonine. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with ZIC3-related disease. This variant is not present in population databases (ExAC no frequency). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.15
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.69	D;.
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.92	D;D
M_CAP	Pathogenic	0.82	D
MetaRNN	Pathogenic	0.92	D;D
MetaSVM	Benign	-0.77	T
MutationAssessor	Uncertain	2.1	M;M
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-6.7	D;D
REVEL	Uncertain	0.57
Sift	Uncertain	0.011	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.91
MutPred		0.61		Gain of phosphorylation at P357 (P = 0.0709);Gain of phosphorylation at P357 (P = 0.0709);
MVP		0.77
MPC		2.6
ClinPred		0.99	D
GERP RS		5.7
Varity_R		0.83
gMVP		0.96

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: rs1556030199; hg19: chrX-136651069;