4-5793606-A-G

Variant names:

• chr4-5793606-A-G
• rs909612975
• NM_153717.3:c.1777-2A>G

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1 PP5_Very_Strong

The NM_153717.3(EVC):​c.1777-2A>G variant causes a splice acceptor, intron change. The variant allele was found at a frequency of 0.00000645 in 1,551,412 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/2 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000057 (0 hom.)
• Consequence: EVC NM_153717.3 splice_acceptor, intron
• Scores: Splicing: ADA: 0.9999
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: 4.68
• Publications: 1 publications found

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]

CRMP1 (HGNC:2365): (collapsin response mediator protein 1) This gene encodes a member of a family of cytosolic phosphoproteins expressed exclusively in the nervous system. The encoded protein is thought to be a part of the semaphorin signal transduction pathway implicated in semaphorin-induced growth cone collapse during neural development. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Pathogenic. The variant received 16 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, No cryptic splice site detected. Exon removal results in frameshift change.
• PP5: Variant 4-5793606-A-G is Pathogenic according to our data. Variant chr4-5793606-A-G is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 551792.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_153717.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EVC	NM_153717.3	MANE Select	c.1777-2A>G		splice_acceptor intron	N/A	NP_714928.1
	EVC	NM_001306090.2		c.1777-2A>G		splice_acceptor intron	N/A	NP_001293019.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EVC	ENST00000264956.11	TSL:1 MANE Select	c.1777-2A>G		splice_acceptor intron	N/A	ENSP00000264956.6
	EVC	ENST00000506240.1	TSL:3	n.93A>G		non_coding_transcript_exon	Exon 1 of 2
	CRMP1	ENST00000506216.5	TSL:5	n.1647+31888T>C		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152214 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000640 AC: 1 AN: 156284 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000166

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000572 AC: 8 AN: 1399198 Hom.: 0 Cov.: 29 AF XY: 0.00000724 AC XY: 5 AN XY: 690198

African (AFR) AF: 0.00 AC: 0 AN: 31626

American (AMR) AF: 0.00 AC: 0 AN: 35758

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25184

East Asian (EAS) AF: 0.00 AC: 0 AN: 35780

South Asian (SAS) AF: 0.00 AC: 0 AN: 79232

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49330

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5562

European-Non Finnish (NFE) AF: 0.00000742 AC: 8 AN: 1078740

Other (OTH) AF: 0.00 AC: 0 AN: 57986

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152214 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74360

African (AFR) AF: 0.00 AC: 0 AN: 41460

American (AMR) AF: 0.00 AC: 0 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5198

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10620

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68036

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.0000579 Hom.: 0

Bravo AF: 0.0000189

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Ellis-van Creveld syndrome Pathogenic:2

Apr 27, 2020

Natera, Inc.

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

May 15, 2017

Counsyl

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com.

Ellis-van Creveld syndrome;C0457013:Curry-Hall syndrome Pathogenic:2

Dec 03, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change affects an acceptor splice site in intron 12 of the EVC gene. It is expected to disrupt RNA splicing. Variants that disrupt the donor or acceptor splice site typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in EVC are known to be pathogenic (PMID: 23220543). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. Disruption of this splice site has been observed in individuals with Ellis-van Creveld syndrome (PMID: 17024374, 23220543). This variant is also known as IVS12-2A > G. ClinVar contains an entry for this variant (Variation ID: 551792). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic.

Dec 25, 2023

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

not provided Pathogenic:1

Oct 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

EVC: PVS1, PM2

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.60	D
BayesDel_noAF	Uncertain	0.010
CADD	Pathogenic	29
DANN	Uncertain	0.99
Eigen	Pathogenic	0.95
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Benign	0.69	D
PhyloP100		4.7
GERP RS		5.2
Mutation Taster		=6/94	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
SpliceAI score (max)		0.98		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.71		Position offset: -3
DS_AL_spliceai		0.98		Position offset: 2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs909612975; hg19: chr4-5795333;