rs371666396

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_144573.4(NEXN):c.864G>T(p.Met288Ile) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,613,530 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

NEXN
NM_144573.4 missense, splice_region

Scores

Splicing: ADA: 1.000

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 9.36

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 Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEXN	NM_144573.4 link	c.864G>T	p.Met288Ile	missense_variant, splice_region_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.864G>T	p.Met288Ile	missense_variant, splice_region_variant	Exon 8 of 13	1	NM_144573.4	ENSP00000333938.7		Q0ZGT2-1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

152016

Hom.:

Cov.:

show subpopulations

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000404

AC:

AN:

247520

Hom.:

AF XY:

0.00

AC XY:

AN XY:

134688

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000894

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461514

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727054

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

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:

0.00

GnomAD4 genome

AF:

0.00000658

AC:

AN:

152016

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74228

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.00000961

Hom.:

Bravo

AF:

0.00000378

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000122

AC:

ExAC

AF:

0.00000828

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 03, 2015

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant classified as Uncertain Significance - Favor Pathogenic. The p.Met288Ile variant in NEXN has not been reported in individuals with cardiomyopathy, but h as been identified in 1/65588 European chromosomes by the Exome Aggregation Cons ortium (ExAC, http://exac.broadinstitute.org; dbSNP rs371666396). This variant i s located in the last base of the exon, which is part of the 5? splice region. C omputational tools do suggest an impact to splicing, though this information is not predictive enough to determine pathogenicity. Although this variant is predi cted to disrupt splicing, the NEXN gene has not been widely studied and the spec trum of variants leading to disease is not well-defined. Loss of NEXN function h as been shown to cause DCM in zebrafish (Hassel 2009) and several predicted loss -of-function variants have been reported in individuals with a wide range of phe notypes including ASD, HCM, and DCM with LVNC, VT, and/or MVP (LMM unpublished d ata, Syrmou 2013, Pugh 2014); however, it remains unclear if one or both copies of the gene must be affected to cause disease (Hassel 2009, LMM unpublished data ). In summary, while there is some suspicion for a pathogenic role, the clinical significance of the p.Met288Ile variant is uncertain. -

Cardiovascular phenotype

Uncertain:1

Mar 18, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.864G>T variant (also known as p.M288I), located in coding exon 7 of the NEXN gene, results from a G to T substitution at nucleotide position 864. The amino acid change results in methionine to isoleucine at codon 288, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Dilated cardiomyopathy 1CC;C3151267:Hypertrophic cardiomyopathy 20

Uncertain:1

Jan 07, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.44

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Uncertain

-0.040

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Benign

0.16

T;.;T;T

Eigen

Pathogenic

0.83

Eigen_PC

Pathogenic

0.78

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.93

D;D;D;D

M_CAP

Benign

0.060

MetaRNN

Benign

0.42

T;T;T;T

MetaSVM

Benign

-0.40

MutationAssessor

Pathogenic

3.0

.;.;M;.

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-1.1

N;N;N;N

REVEL

Benign

0.21

Sift

Uncertain

0.0070

D;D;D;D

Sift4G

Uncertain

0.048

D;T;T;T

Polyphen

0.95

.;.;P;.

Vest4

0.67, 0.69

MutPred

0.21

.;.;Loss of MoRF binding (P = 0.1978);.;

MVP

0.85

MPC

0.097

ClinPred

0.84

GERP RS

5.6

Varity_R

0.38

gMVP

0.17

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

1.0

SpliceAI score (max)

0.080

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