4-5711381-A-C

Position:

• chr4-5711381-A-C

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1 PS1_Moderate PM2 PP5_Moderate

The NM_153717.3(EVC):​c.1A>C​(p.Met1?) variant causes a start lost change involving the alteration of a non-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 Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: EVC NM_153717.3 start_lost
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 2.74

Genes affected

EVC (HGNC:3497): (EvC ciliary complex subunit 1) This gene encodes a protein containing a leucine zipper and a transmembrane domain. This gene has been implicated in both Ellis-van Creveld syndrome (EvC) and Weyers acrodental dysostosis. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PS1: Another start lost variant in NM_153717.3 (EVC) was described as [Likely_pathogenic] in ClinVar as 558005
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 4-5711381-A-C is Pathogenic according to our data. Variant chr4-5711381-A-C is described in ClinVar as [Pathogenic]. Clinvar id is 2934557.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EVC	NM_153717.3	c.1A>C	p.Met1?	start_lost	1/21	ENST00000264956.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EVC	ENST00000264956.11	c.1A>C	p.Met1?	start_lost	1/21	1	NM_153717.3	P1
EVC	ENST00000509451.1	c.1A>C	p.Met1?	start_lost	1/12	1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Ellis-van Creveld syndrome;C0457013:Curry-Hall syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

May 28, 2023

For these reasons, this variant has been classified as Pathogenic. This variant disrupts a region of the EVC protein in which other variant(s) (p.Gly35Asp) have been observed in individuals with EVC-related conditions (Invitae). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. Disruption of the initiator codon has been observed in individuals with Ellis-van Creveld syndrome (PMID: 19810119, 28854412). It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change affects the initiator methionine of the EVC mRNA. The next in-frame methionine is located at codon 92. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Uncertain	0.024	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	15
DANN	Benign	0.76
DEOGEN2	Benign	0.093	T;.
Eigen	Benign	-0.70
Eigen_PC	Benign	-0.77
FATHMM_MKL	Benign	0.31	N
LIST_S2	Uncertain	0.90	D;D
M_CAP	Pathogenic	0.77	D
MetaRNN	Pathogenic	0.98	D;D
MetaSVM	Benign	-0.94	T
MutationTaster	Benign	1.0	D;D;D
PROVEAN	Benign	-0.94	N;N
REVEL	Benign	0.22
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		0.0070	B;.
Vest4		0.78
MutPred		1.0		Loss of MoRF binding (P = 0.0766);Loss of MoRF binding (P = 0.0766);
MVP		0.28
ClinPred		0.65	D
GERP RS		2.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.94
gMVP		0.42

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: rs1324604027; hg19: chr4-5713108;