2-151710447-T-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -15 ACMG points: 1P and 16B. PP3BP6_Very_StrongBS1BS2

The NM_001164507.2(NEB):c.914A>G(p.Asp305Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00171 in 1,611,260 control chromosomes in the GnomAD database, including 39 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. D305D) has been classified as Benign.

Frequency

Genomes: 𝑓 0.0019 ( 4 hom., cov: 32)

Exomes 𝑓: 0.0017 ( 35 hom. )

Consequence

NEB
NM_001164507.2 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11

Conservation

PhyloP100: 2.75

Publications

6 publications found

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 Gene-Disease associations (from GenCC):

nemaline myopathy 2
Inheritance: AR, AD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Myriad Women’s Health, G2P, Ambry Genetics
childhood-onset nemaline myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
intermediate nemaline myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
typical nemaline myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
lethal multiple pterygium syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
severe congenital nemaline myopathy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

NEB links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -15 ACMG points.

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

BP6

Variant 2-151710447-T-C is Benign according to our data. Variant chr2-151710447-T-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 193880.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.00188 (286/152314) while in subpopulation EAS AF = 0.0232 (120/5178). AF 95% confidence interval is 0.0198. There are 4 homozygotes in GnomAd4. There are 175 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 4 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEB	NM_001164507.2 link	c.914A>G	p.Asp305Gly	missense_variant	Exon 11 of 182	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2 link	c.914A>G	p.Asp305Gly	missense_variant	Exon 11 of 182	ENST00000397345.8	NP_001157980.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
NEB	ENST00000397345.8 link	c.914A>G	p.Asp305Gly	missense_variant	Exon 11 of 182	5	NM_001164508.2	ENSP00000380505.3
NEB	ENST00000427231.7 link	c.914A>G	p.Asp305Gly	missense_variant	Exon 11 of 182	5	NM_001164507.2	ENSP00000416578.2
NEB	ENST00000409198.5 link	c.914A>G	p.Asp305Gly	missense_variant	Exon 11 of 150	5		ENSP00000386259.1

Frequencies

GnomAD3 genomes

AF:

0.00188

AC:

286

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000577

Gnomad EAS

AF:

0.0231

Gnomad SAS

AF:

0.00104

Gnomad FIN

AF:

0.0108

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000617

Gnomad OTH

AF:

0.000956

GnomAD2 exomes

AF:

0.00321

AC:

798

AN:

248910

AF XY:

0.00294

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00199

Gnomad EAS exome

AF:

0.0191

Gnomad FIN exome

AF:

0.0113

Gnomad NFE exome

AF:

0.00147

Gnomad OTH exome

AF:

0.00298

GnomAD4 exome

AF:

0.00170

AC:

2474

AN:

1458946

Hom.:

Cov.:

AF XY:

0.00165

AC XY:

1196

AN XY:

725936

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33394

American (AMR)

AF:

0.0000447

AC:

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.00234

AC:

AN:

26082

East Asian (EAS)

AF:

0.0338

AC:

1343

AN:

39676

South Asian (SAS)

AF:

0.000349

AC:

AN:

86078

European-Finnish (FIN)

AF:

0.0108

AC:

574

AN:

53326

Middle Eastern (MID)

AF:

0.000348

AC:

AN:

5754

European-Non Finnish (NFE)

AF:

0.000297

AC:

330

AN:

1109664

Other (OTH)

AF:

0.00219

AC:

132

AN:

60264

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

116

232

347

463

579

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

120

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00188

AC:

286

AN:

152314

Hom.:

Cov.:

AF XY:

0.00235

AC XY:

175

AN XY:

74488

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41570

American (AMR)

AF:

0.00

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.000577

AC:

AN:

3468

East Asian (EAS)

AF:

0.0232

AC:

120

AN:

5178

South Asian (SAS)

AF:

0.00104

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.0108

AC:

115

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000617

AC:

AN:

68026

Other (OTH)

AF:

0.000946

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.493

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000990

Hom.:

Bravo

AF:

0.00100

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000362

AC:

ExAC

AF:

0.00348

AC:

421

Asia WGS

AF:

0.0100

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Nemaline myopathy 2

Benign:5

May 24, 2018

Counsyl

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Jan 06, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Jan 07, 2020

Natera, Inc.

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jun 10, 2021

Genome-Nilou Lab

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:3

Oct 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

NEB: PP3, BS1, BS2 -

Jun 25, 2020

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is associated with the following publications: (PMID: 28391287) -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

not specified

Benign:2

Feb 24, 2022

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

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: NEB c.914A>G (p.Asp305Gly) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0032 in 248910 control chromosomes, predominantly at a frequency of 0.019 within the East Asian subpopulation in the gnomAD database, including 6 homozygotes. The observed variant frequency within East Asian control individuals in the gnomAD database is approximately 5.4 fold of the estimated maximal expected allele frequency for a pathogenic variant in NEB causing Nemaline Myopathy 2 phenotype (0.0035), strongly suggesting that the variant is a benign polymorphism found primarily in populations of East Asian origin. To our knowledge, no occurrence of c.914A>G in individuals affected with Nemaline Myopathy 2 and no experimental evidence demonstrating its impact on protein function have been reported. Six clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign. -

Nov 20, 2014

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nemaline myopathy 2;C5543431:Arthrogryposis multiplex congenita 6

Benign:1

Nov 05, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.60

BayesDel_noAF

Benign

-0.61

CADD

Uncertain

(source)

DANN

Benign

0.92

DEOGEN2

Benign

0.060

.;.;T;.;T;.;.

Eigen

Benign

-0.51

Eigen_PC

Benign

-0.39

FATHMM_MKL

Benign

0.71

LIST_S2

Uncertain

0.89

D;D;D;D;D;.;.

MetaRNN

Benign

0.0076

T;T;T;T;T;T;T

MetaSVM

Benign

-0.93

MutationAssessor

Benign

1.4

L;L;.;L;L;L;L

PhyloP100

2.8

PrimateAI

Benign

0.30

PROVEAN

Benign

-2.2

N;D;.;D;N;.;.

REVEL

Benign

0.078

Sift

Benign

0.20

T;T;.;T;T;.;.

Sift4G

Uncertain

0.0040

D;D;D;D;D;D;D

Polyphen

0.032

.;.;.;.;B;.;.

Vest4

0.46

MVP

0.34

MPC

0.14

ClinPred

0.038

GERP RS

4.5

Varity_R

0.16

gMVP

0.49

Mutation Taster

=96/4

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.75

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.75

Position offset: 1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over