chr1-77926863-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_144573.4(NEXN):c.835C>T(p.Arg279Cys) variant causes a missense change. The variant allele was found at a frequency of 0.000224 in 1,613,862 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R279H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00023 ( 1 hom. )

Consequence

NEXN
NM_144573.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:2B:7

Conservation

PhyloP100: 4.69

Variant links:

Genes affected

NEXN (HGNC:29557): (nexilin F-actin binding protein) This gene encodes a filamentous actin-binding protein that may function in cell adhesion and migration. Mutations in this gene have been associated with dilated cardiomyopathy, also known as CMD1CC. Alternatively spliced transcript variants have been described.[provided by RefSeq, Feb 2010]

NEXN links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.007816255).

BP6

Variant 1-77926863-C-T is Benign according to our data. Variant chr1-77926863-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 30994.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Benign=2, Uncertain_significance=1}. Variant chr1-77926863-C-T is described in Lovd as [Benign]. Variant chr1-77926863-C-T is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.000184 (28/152184) while in subpopulation EAS AF= 0.00444 (23/5176). AF 95% confidence interval is 0.00304. There are 0 homozygotes in gnomad4. There are 17 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 28 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEXN	NM_144573.4 link	c.835C>T	p.Arg279Cys	missense_variant	Exon 8 of 13	ENST00000334785.12	NP_653174.3	Q0ZGT2-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NEXN	ENST00000334785.12 link	c.835C>T	p.Arg279Cys	missense_variant	Exon 8 of 13	1	NM_144573.4	ENSP00000333938.7		Q0ZGT2-1

Frequencies

GnomAD3 genomes

AF:

0.000184

AC:

AN:

152066

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00443

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000535

AC:

133

AN:

248452

Hom.:

AF XY:

0.000578

AC XY:

AN XY:

134980

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000174

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00641

Gnomad SAS exome

AF:

0.0000655

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000800

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.000229

AC:

334

AN:

1461678

Hom.:

Cov.:

AF XY:

0.000221

AC XY:

161

AN XY:

727138

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000224

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00497

Gnomad4 SAS exome

AF:

0.0000696

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.0000953

Gnomad4 OTH exome

AF:

0.000215

GnomAD4 genome

AF:

0.000184

AC:

AN:

152184

Hom.:

Cov.:

AF XY:

0.000228

AC XY:

AN XY:

74406

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00444

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000172

Hom.:

Bravo

AF:

0.000310

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.00

AC:

ExAC

AF:

0.000588

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:2Benign:7

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Hypertrophic cardiomyopathy 20

Pathogenic:1Uncertain:1

Nov 12, 2010

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Mar 18, 2016

Soonchunhyang University Bucheon Hospital, Soonchunhyang University Medical Center

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: reference population

- -

Cardiomyopathy

Benign:2

Jan 21, 2019

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 04, 2024

Molecular Genetics, Royal Melbourne Hospital

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Primary familial hypertrophic cardiomyopathy

Uncertain:1

Jan 30, 2014

Blueprint Genetics

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not specified

Benign:1

Aug 13, 2012

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Arg279Cys in exon 8 of NEXN: This variant has been reported in 1 Asian individua l with HCM, segregated in 2 affected relatives, was absent from 384 race-matched control chromosomes, and resulted in a local accumulation of the protein in cel l culture studies (Wang 2010). However, this variant has been identified in 1.3% (5/394) of Han Chinese chromosomes from a broad population by the 1000 Genomes project (dbSNP rs146245480). At this frequency this variant is most likely beni gn though a modifying role cannot be excluded. -

not provided

Benign:1

Sep 03, 2019

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is associated with the following publications: (PMID: 23840593, 24503780, 20970104, 32344918) -

Cardiovascular phenotype

Benign:1

Mar 13, 2018

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

NEXN-related disorder

Benign:1

Jun 26, 2019

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Dilated cardiomyopathy 1CC;C3151267:Hypertrophic cardiomyopathy 20

Benign:1

Oct 22, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Benign

-0.019

BayesDel_noAF

Pathogenic

0.20

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.13

T;.;T;T

Eigen

Uncertain

0.65

Eigen_PC

Uncertain

0.61

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.91

D;D;D;D

M_CAP

Uncertain

0.087

MetaRNN

Benign

0.0078

T;T;T;T

MetaSVM

Uncertain

-0.22

MutationAssessor

Uncertain

2.8

.;.;M;.

PrimateAI

Benign

0.36

PROVEAN

Uncertain

-3.4

D;N;N;N

REVEL

Benign

0.21

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Pathogenic

0.0010

D;D;D;D

Polyphen

1.0

.;.;D;.

Vest4

0.62, 0.57

MVP

0.90

MPC

0.34

ClinPred

0.21

GERP RS

5.6

Varity_R

0.29

gMVP

0.12

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

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