rs756920047

Variant summary

Our verdict is Uncertain significance. Variant got 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. 12/21 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

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 Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NEB	NM_001164507.2 linkuse as main transcript	c.1648A>G	p.Lys550Glu	missense_variant	18/182	ENST00000427231.7
NEB	NM_001164508.2 linkuse as main transcript	c.1648A>G	p.Lys550Glu	missense_variant	18/182	ENST00000397345.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NEB	ENST00000397345.8 linkuse as main transcript	c.1648A>G	p.Lys550Glu	missense_variant	18/182	5	NM_001164508.2	P5	P20929-2
NEB	ENST00000427231.7 linkuse as main transcript	c.1648A>G	p.Lys550Glu	missense_variant	18/182	5	NM_001164507.2	A2	P20929-3
NEB	ENST00000489048.1 linkuse as main transcript	n.547A>G		non_coding_transcript_exon_variant	6/12	1
NEB	ENST00000409198.5 linkuse as main transcript	c.1648A>G	p.Lys550Glu	missense_variant	18/150	5			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

GnomAD3 exomes

AF:

0.00000402

AC:

AN:

249030

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135096

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 SAS 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

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152248

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74386

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

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

Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Sep 01, 2021	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. -
Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Mar 01, 2021	- -

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

Dann

Uncertain

1.0

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

MutationTaster

Benign

0.91

N;N;N;N

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

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

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