2-151646139-GTTGA-G

Position:

chr2-151646139-GTTGA-G

Variant summary

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

The NM_001164507.2(NEB):c.7523_7526del(p.Ile2508ThrfsTer14) variant causes a frameshift change. The variant allele was found at a frequency of 0.0000151 in 1,586,504 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

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

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

NEB
NM_001164507.2 frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6

Conservation

PhyloP100: 4.26

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:

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 2-151646139-GTTGA-G is Pathogenic according to our data. Variant chr2-151646139-GTTGA-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 242434.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-151646139-GTTGA-G is described in Lovd as [Pathogenic]. Variant chr2-151646139-GTTGA-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NEB	NM_001164507.2 linkuse as main transcript	c.7523_7526del	p.Ile2508ThrfsTer14	frameshift_variant	55/182	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2 linkuse as main transcript	c.7523_7526del	p.Ile2508ThrfsTer14	frameshift_variant	55/182	ENST00000397345.8	NP_001157980.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NEB	ENST00000397345.8 linkuse as main transcript	c.7523_7526del	p.Ile2508ThrfsTer14	frameshift_variant	55/182	5	NM_001164508.2	ENSP00000380505	P5	P20929-2
NEB	ENST00000427231.7 linkuse as main transcript	c.7523_7526del	p.Ile2508ThrfsTer14	frameshift_variant	55/182	5	NM_001164507.2	ENSP00000416578	A2	P20929-3
NEB	ENST00000409198.5 linkuse as main transcript	c.7523_7526del	p.Ile2508ThrfsTer14	frameshift_variant	55/150	5		ENSP00000386259		P20929-4

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152208

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:

0.0000186

AC:

AN:

214972

Hom.:

AF XY:

0.0000261

AC XY:

AN XY:

115086

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:

0.0000424

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000160

AC:

AN:

1434296

Hom.:

AF XY:

0.0000197

AC XY:

AN XY:

710900

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:

0.0000210

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152208

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74356

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

Bravo

AF:

0.00000756

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Nemaline myopathy 2

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Counsyl	May 29, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 04, 2022	For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 242434). This variant is also known as g.87012_87015del. This premature translational stop signal has been observed in individual(s) with nemaline myopathy (PMID: 16917880). This variant is present in population databases (no rsID available, gnomAD 0.004%). This sequence change creates a premature translational stop signal (p.Ile2508Thrfs*14) 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). -

NEB-related disorder

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Nov 28, 2022

The NEB c.7523_7526delTCAA variant is predicted to result in a frameshift and premature protein termination (p.Ile2508Thrfs*14). In the literature, this variant is also referred to as g.87012_87015delAATC. This variant has been reported in the compound heterozygous state in individuals with nemaline myopathy (Family 41, mild form of disease, Lehtokari et al. 2006. PubMed ID: 16917880; #17, Punetha et al. 2016. PubMed ID: 27854218). This variant was also reported in the heterozygous state in an induvial with nemaline myopathy (Family 19, Todd et al. 2015. PubMed ID: 26578207). This variant is reported in 0.0042% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/2-152502653-GTTGA-G). Frameshift variants in NEB are expected to be pathogenic. This variant is interpreted as pathogenic. -

not provided

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Jan 23, 2017

The c.7523_7526delTCAA pathogenic variant in the NEB gene has been reported previously using alternate nomenclature (g.87012_87015delAATC) in combination with another NEB variant in an individual with a mild form of nemaline myopathy (Lehtokari et al., 2006). The c.7523_7526delTCAA variant causes a frameshift starting with codon Isoleucine 2508, changes this amino acid to a Threonine residue, and creates a premature Stop codon at position 14 of the new reading frame, denoted p.Ile2508ThrfsX14. This variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. The c.7523_7526delTCAA variant was not observed in approximately 6,000 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. We interpret c.7523_7526delTCAA as a pathogenic variant. -

Arthrogryposis multiplex congenita 6

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Mar 16, 2024

- -

Nemaline myopathy 2;C5543431:Arthrogryposis multiplex congenita 6

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Sep 02, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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