rs769345284

Positions:

chr2-151537898-G-A

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_001164508.2(NEB):c.21076C>T(p.Arg7026Ter) variant causes a stop gained change. The variant allele was found at a frequency of 0.0000171 in 1,459,460 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

NEB
NM_001164508.2 stop_gained

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8

Conservation

PhyloP100: 5.90

Variant links:

Genes affected

NEB (HGNC:7720): (nebulin) This gene encodes nebulin, a giant protein component of the cytoskeletal matrix that coexists with the thick and thin filaments within the sarcomeres of skeletal muscle. In most vertebrates, nebulin accounts for 3 to 4% of the total myofibrillar protein. The encoded protein contains approximately 30-amino acid long modules that can be classified into 7 types and other repeated modules. Protein isoform sizes vary from 600 to 800 kD due to alternative splicing that is tissue-, species-,and developmental stage-specific. Of the 183 exons in the nebulin gene, at least 43 are alternatively spliced, although exons 143 and 144 are not found in the same transcript. Of the several thousand transcript variants predicted for nebulin, the RefSeq Project has decided to create three representative RefSeq records. Mutations in this gene are associated with recessive nemaline myopathy. [provided by RefSeq, Sep 2009]

NEB links:

LOC124906081 (HGNC:):

LOC124906081 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 2-151537898-G-A is Pathogenic according to our data. Variant chr2-151537898-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 190457.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-151537898-G-A is described in Lovd as [Pathogenic]. Variant chr2-151537898-G-A is described in Lovd as [Likely_pathogenic]. Variant chr2-151537898-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
NEB	NM_001164507.2 linkuse as main transcript	c.21076C>T	p.Arg7026Ter	stop_gained	140/182	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2 linkuse as main transcript	c.21076C>T	p.Arg7026Ter	stop_gained	140/182	ENST00000397345.8	NP_001157980.2
LOC124906081	XR_007087266.1 linkuse as main transcript	n.123G>A		non_coding_transcript_exon_variant	2/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NEB	ENST00000397345.8 linkuse as main transcript	c.21076C>T	p.Arg7026Ter	stop_gained	140/182	5	NM_001164508.2	ENSP00000380505	P5	P20929-2
NEB	ENST00000427231.7 linkuse as main transcript	c.21076C>T	p.Arg7026Ter	stop_gained	140/182	5	NM_001164507.2	ENSP00000416578	A2	P20929-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000323

AC:

AN:

247458

Hom.:

AF XY:

0.0000447

AC XY:

AN XY:

134190

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000293

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000331

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000534

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000171

AC:

AN:

1459460

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

725866

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000225

Gnomad4 ASJ exome

AF:

0.0000384

Gnomad4 EAS exome

AF:

0.0000505

Gnomad4 SAS exome

AF:

0.0000117

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000162

Gnomad4 OTH exome

AF:

0.0000332

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000508

Hom.:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000595

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Nemaline myopathy 2

Pathogenic:4

Pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Jan 06, 2017	- -
Pathogenic, criteria provided, single submitter	research	Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center	Mar 14, 2024	- -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 22, 2023	This sequence change creates a premature translational stop signal (p.Arg7026*) in the NEB gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in NEB are known to be pathogenic (PMID: 25205138). This variant is present in population databases (rs769345284, gnomAD 0.005%). This premature translational stop signal has been observed in individuals with nemaline myopathy (PMID: 25205138, 26841830). ClinVar contains an entry for this variant (Variation ID: 190457). For these reasons, this variant has been classified as Pathogenic. -

Nemaline myopathy

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

May 14, 2018

Variant summary: NEB c.21076C>T (p.Arg7026X) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. Truncations downstream of this position have been classified as pathogenic by our laboratory (eg. c.24407_24410dupTGTT, p.Leu8137fsX18; c.24559C>T, p.Arg8187X). The variant allele was found at a frequency of 3.3e-05 in 244554 control chromosomes (gnomAD). This frequency is not significantly higher than expected for a pathogenic variant in NEB causing Nemaline Myopathy 2 (3.3e-05 vs 0.0035), allowing no conclusion about variant significance. The variant, c.21076C>T, has been reported in the literature in individuals affected with Nemaline Myopathy 2 (Lehtokari_2014, Oliveira_2016, Park_2018), as well as in a family with recurrent fetal loss in the homozygous state (Shamseldin_2015). These data indicate that the variant is likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as pathogenic. -

Non-immune hydrops fetalis

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

research

Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center

Dec 15, 2013

- -

Arthrogryposis multiplex congenita 6

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Feb 22, 2024

- -

Nemaline myopathy 2;C5543431:Arthrogryposis multiplex congenita 6

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Mar 23, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.52

BayesDel_noAF

Pathogenic

0.63

CADD

Pathogenic

DANN

Uncertain

0.99

Eigen

Pathogenic

0.77

Eigen_PC

Uncertain

0.64

FATHMM_MKL

Uncertain

0.93

MutationTaster

Benign

1.0

A;A;A;A

Vest4

0.99

GERP RS

4.7

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