4-5748148-A-G

Position:

chr4-5748148-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_153717.3(EVC):c.940A>G(p.Met314Val) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.0000031 in 1,614,192 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

EVC
NM_153717.3 missense, splice_region

Scores

Splicing: ADA: 0.00002635

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.77

Variant links:

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]

EVC links:

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]

CRMP1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 4 uncertain in NM_153717.3

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.26324195).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EVC	NM_153717.3 linkuse as main transcript	c.940A>G	p.Met314Val	missense_variant, splice_region_variant	8/21	ENST00000264956.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
EVC	ENST00000264956.11 linkuse as main transcript	c.940A>G	p.Met314Val	missense_variant, splice_region_variant	8/21	1	NM_153717.3	P1
EVC	ENST00000509451.1 linkuse as main transcript	c.940A>G	p.Met314Val	missense_variant, splice_region_variant	8/12	1
CRMP1	ENST00000506216.5 linkuse as main transcript	n.1812T>C		non_coding_transcript_exon_variant	13/13	5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251480

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135916

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461880

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.00000180

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152312

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74480

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 08, 2021

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 sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with EVC-related conditions. This variant is present in population databases (rs557010916, gnomAD 0.007%). This sequence change replaces methionine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 314 of the EVC protein (p.Met314Val). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.29

CADD

Benign

DANN

Benign

0.89

DEOGEN2

Benign

0.36

T;.

Eigen

Benign

-0.27

Eigen_PC

Benign

-0.19

FATHMM_MKL

Uncertain

0.78

LIST_S2

Uncertain

0.87

D;D

M_CAP

Benign

0.013

MetaRNN

Benign

0.26

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.5

M;.

MutationTaster

Benign

0.92

D;D;D

PrimateAI

Benign

0.46

PROVEAN

Benign

-2.2

N;D

REVEL

Benign

0.17

Sift

Benign

0.14

T;T

Sift4G

Benign

0.23

T;T

Polyphen

0.21

B;.

Vest4

0.60

MutPred

0.55

Loss of disorder (P = 0.1607);Loss of disorder (P = 0.1607);

MVP

0.30

ClinPred

0.17

GERP RS

2.4

Varity_R

0.11

gMVP

0.38

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000026

dbscSNV1_RF

Benign

0.0040

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over