NM_001164507.2:c.1648A>G

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001164507.2(NEB):c.1648A>G(p.Lys550Glu) variant causes a missense change. The variant allele was found at a frequency of 0.00000186 in 1,613,738 control chromosomes in the GnomAD database, with no homozygous occurrence. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. K550K) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

NEB
NM_001164507.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:2

Conservation

PhyloP100: 4.82

Publications

0 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: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEB	NM_001164507.2 link	c.1648A>G	p.Lys550Glu	missense_variant	Exon 18 of 182	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2 link	c.1648A>G	p.Lys550Glu	missense_variant	Exon 18 of 182	ENST00000397345.8	NP_001157980.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
NEB	ENST00000397345.8 link	c.1648A>G	p.Lys550Glu	missense_variant	Exon 18 of 182	5	NM_001164508.2	ENSP00000380505.3	P20929-2
NEB	ENST00000427231.7 link	c.1648A>G	p.Lys550Glu	missense_variant	Exon 18 of 182	5	NM_001164507.2	ENSP00000416578.2	P20929-3
NEB	ENST00000489048.1 link	n.547A>G		non_coding_transcript_exon_variant	Exon 6 of 12	1
NEB	ENST00000409198.5 link	c.1648A>G	p.Lys550Glu	missense_variant	Exon 18 of 150	5		ENSP00000386259.1	P20929-4

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152248

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000402

AC:

AN:

249030

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461490

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727018

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33474

American (AMR)

AF:

0.0000447

AC:

AN:

44706

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39684

South Asian (SAS)

AF:

0.00

AC:

AN:

86232

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53402

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111728

Other (OTH)

AF:

0.00

AC:

AN:

60366

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152248

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74386

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41468

American (AMR)

AF:

0.0000654

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5204

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68038

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000827

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Nemaline myopathy 2

Uncertain:2

Sep 01, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces lysine with glutamic acid at codon 550 of the NEB protein (p.Lys550Glu). The lysine residue is weakly conserved and there is a small physicochemical difference between lysine and glutamic acid. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the ExAC database. This variant has not been reported in the literature in individuals affected with NEB-related conditions. ClinVar contains an entry for this variant (Variation ID: 534024). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Mar 01, 2021

Natera, Inc.

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.33

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Benign

-0.33

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.029

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

Eigen

Uncertain

0.23

Eigen_PC

Uncertain

0.35

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.94

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

M_CAP

Benign

0.052

MetaRNN

Uncertain

0.44

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

MetaSVM

Benign

-0.57

MutationAssessor

Benign

2.0

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

PhyloP100

4.8

PrimateAI

Benign

0.34

PROVEAN

Benign

-1.1

N;N;.;N;N;.;.

REVEL

Benign

0.20

Sift

Uncertain

0.023

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

Sift4G

Uncertain

0.024

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

Polyphen

0.14

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

Vest4

0.49

MutPred

0.75

Loss of methylation at K550 (P = 0.0248);Loss of methylation at K550 (P = 0.0248);Loss of methylation at K550 (P = 0.0248);Loss of methylation at K550 (P = 0.0248);Loss of methylation at K550 (P = 0.0248);Loss of methylation at K550 (P = 0.0248);Loss of methylation at K550 (P = 0.0248);

MVP

0.64

MPC

0.15

ClinPred

0.50

GERP RS

5.6

Varity_R

0.24

gMVP

0.16

Mutation Taster

=92/8

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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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NM_001164507.2:c.1648A>G

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