2-151529260-C-G

Variant names:

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_StrongBP6BS1BS2_Supporting

The NM_001164507.2(NEB):c.21685G>C(p.Asp7229His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00277 in 1,613,710 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0017 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0029 ( 4 hom. )

Consequence

NEB
NM_001164507.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:5

Conservation

PhyloP100: 7.91

Publications

3 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 links:

RIF1 (HGNC:23207): (replication timing regulatory factor 1) This gene encodes a protein that shares homology with the yeast teleomere binding protein, Rap1 interacting factor 1. This protein localizes to aberrant telomeres may be involved in DNA repair. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Apr 2010]

RIF1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -10 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0207026).

BP6

Variant 2-151529260-C-G is Benign according to our data. Variant chr2-151529260-C-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 193961.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00172 (262/152312) while in subpopulation NFE AF = 0.00332 (226/68036). AF 95% confidence interval is 0.00297. There are 0 homozygotes in GnomAd4. There are 117 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 4 AD,AR geneVariant has number of homozygotes lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEB	NM_001164507.2 link	c.21685G>C	p.Asp7229His	missense_variant	Exon 146 of 182	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2 link	c.21685G>C	p.Asp7229His	missense_variant	Exon 146 of 182	ENST00000397345.8	NP_001157980.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NEB	ENST00000397345.8 link	c.21685G>C	p.Asp7229His	missense_variant	Exon 146 of 182	5	NM_001164508.2	ENSP00000380505.3		P20929-2
NEB	ENST00000427231.7 link	c.21685G>C	p.Asp7229His	missense_variant	Exon 146 of 182	5	NM_001164507.2	ENSP00000416578.2		P20929-3

Frequencies

GnomAD3 genomes

AF:

0.00172

AC:

262

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000362

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000458

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00104

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00332

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.00183

AC:

456

AN:

249136

AF XY:

0.00186

show subpopulations

Gnomad AFR exome

AF:

0.000258

Gnomad AMR exome

AF:

0.000174

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000111

Gnomad FIN exome

AF:

0.000835

Gnomad NFE exome

AF:

0.00360

Gnomad OTH exome

AF:

0.000827

GnomAD4 exome

AF:

0.00288

AC:

4205

AN:

1461398

Hom.:

Cov.:

AF XY:

0.00285

AC XY:

2072

AN XY:

727002

show subpopulations

African (AFR)

AF:

0.000448

AC:

AN:

33474

American (AMR)

AF:

0.000179

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.0000756

AC:

AN:

39684

South Asian (SAS)

AF:

0.000383

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.000824

AC:

AN:

53398

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00361

AC:

4012

AN:

1111604

Other (OTH)

AF:

0.00146

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

Heterozygous variant carriers

199

398

597

796

995

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

156

312

468

624

780

<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:

0.00172

AC:

262

AN:

152312

Hom.:

Cov.:

AF XY:

0.00157

AC XY:

117

AN XY:

74476

show subpopulations

African (AFR)

AF:

0.000361

AC:

AN:

41564

American (AMR)

AF:

0.000457

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.000414

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00104

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00332

AC:

226

AN:

68036

Other (OTH)

AF:

0.000473

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.00290

Hom.:

Bravo

AF:

0.00169

TwinsUK

AF:

0.00431

AC:

ALSPAC

AF:

0.00519

AC:

ESP6500AA

AF:

0.000260

AC:

ESP6500EA

AF:

0.00277

AC:

ExAC

AF:

0.00190

AC:

230

EpiCase

AF:

0.00229

EpiControl

AF:

0.00338

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:4

Feb 10, 2015

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 19, 2014

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jun 13, 2023

Mayo Clinic Laboratories, Mayo Clinic

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

BS1 -

Nemaline myopathy 2

Uncertain:1Benign:2

Jan 20, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 11, 2020

Natera, Inc.

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

not specified

Benign:2

Mar 14, 2022

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

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: NEB c.21790G>C (p.Asp7264His) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.0018 in 280538 control chromosomes, predominantly at a frequency of 0.0036 within the Non-Finnish European subpopulation in the gnomAD database, including one homozygote. The observed variant frequency within Non-Finnish European control individuals in the gnomAD database is approximately 1.02 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 Non-Finnish European origin. c.21790G>C has been reported in the literature in individuals affected with mild Nemaline Myopathy, sporadic distal myopathy and dilated cardiomyopathy (Wallgren-Pettersson_ 2004, Minoche_2019, Morales_2021). These reports do not provide unequivocal conclusions about association of the variant with Nemaline Myopathy 2. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five ClinVar submitters have assessed this variant since 2014: two classified the variant as of uncertain significance and three as likely benign. Based on the evidence outlined above, the variant was classified as likely benign. -

Jun 05, 2017

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

NEB-related disorder

Benign:1

Jan 20, 2023

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). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.30

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Uncertain

-0.040

CADD

Uncertain

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.11

.;.;T;.;D;T;.;.

Eigen

Pathogenic

0.80

Eigen_PC

Pathogenic

0.82

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.92

D;D;T;D;D;D;.;.

M_CAP

Benign

0.062

MetaRNN

Benign

0.021

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

MetaSVM

Benign

-0.61

MutationAssessor

Uncertain

2.4

M;.;.;.;M;.;.;.

PhyloP100

7.9

PrimateAI

Uncertain

0.59

PROVEAN

Uncertain

-3.1

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

REVEL

Uncertain

0.43

Sift

Uncertain

0.0010

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

Sift4G

Pathogenic

0.0010

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

Polyphen

0.99

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

Vest4

0.60

MVP

0.71

MPC

0.36

ClinPred

0.050

GERP RS

5.8

Varity_R

0.49

gMVP

0.57

Mutation Taster

=50/50

(source)

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

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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