2-151727741-T-A

Variant names:

• chr2-151727741-T-A
• rs587780398
• NM_001164507.2:c.244A>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001164507.2(NEB):​c.244A>T​(p.Met82Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,338 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M82V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: NEB NM_001164507.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.28
• Publications: 0 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.20818233).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEB	NM_001164507.2	c.244A>T	p.Met82Leu	missense_variant	Exon 5 of 182	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2	c.244A>T	p.Met82Leu	missense_variant	Exon 5 of 182	ENST00000397345.8	NP_001157980.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NEB	ENST00000397345.8	c.244A>T	p.Met82Leu	missense_variant	Exon 5 of 182	5	NM_001164508.2	ENSP00000380505.3
NEB	ENST00000427231.7	c.244A>T	p.Met82Leu	missense_variant	Exon 5 of 182	5	NM_001164507.2	ENSP00000416578.2
NEB	ENST00000409198.5	c.244A>T	p.Met82Leu	missense_variant	Exon 5 of 150	5		ENSP00000386259.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461338 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 726948

African (AFR) AF: 0.00 AC: 0 AN: 33458

American (AMR) AF: 0.00 AC: 0 AN: 44630

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26120

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53398

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111662

Other (OTH) AF: 0.00 AC: 0 AN: 60356

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
CADD	Benign	21
DANN	Benign	0.96
DEOGEN2	Benign	0.027	.;.;T;.;T;.;.
Eigen	Benign	0.013
Eigen_PC	Benign	0.21
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.85	T;T;T;T;T;.;.
M_CAP	Benign	0.0081	T
MetaRNN	Benign	0.21	T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.3	L;L;.;L;L;L;L
PhyloP100		4.3
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-0.86	N;N;.;N;N;.;.
REVEL	Benign	0.15
Sift	Benign	1.0	T;T;.;T;T;.;.
Sift4G	Benign	0.18	T;T;T;T;T;T;T
Polyphen		0.0	.;.;.;.;B;.;.
Vest4		0.40
MutPred		0.65		Loss of MoRF binding (P = 0.0852);Loss of MoRF binding (P = 0.0852);Loss of MoRF binding (P = 0.0852);Loss of MoRF binding (P = 0.0852);Loss of MoRF binding (P = 0.0852);Loss of MoRF binding (P = 0.0852);Loss of MoRF binding (P = 0.0852);
MVP		0.32
MPC		0.052
ClinPred		0.77	D
GERP RS		6.0
Varity_R		0.24
gMVP		0.12
Mutation Taster		=84/16	polymorphism

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

Other links and lift over

dbSNP: rs587780398; hg19: chr2-152584255;