2-151640008-A-T

Position:

• chr2-151640008-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001164508.2(NEB):​c.8738T>A​(p.Ile2913Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,650 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: NEB NM_001164508.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.39

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.751

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NEB	NM_001164507.2	c.8738T>A	p.Ile2913Asn	missense_variant	62/182	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2	c.8738T>A	p.Ile2913Asn	missense_variant	62/182	ENST00000397345.8	NP_001157980.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NEB	ENST00000397345.8	c.8738T>A	p.Ile2913Asn	missense_variant	62/182	5	NM_001164508.2	ENSP00000380505.3
NEB	ENST00000427231.7	c.8738T>A	p.Ile2913Asn	missense_variant	62/182	5	NM_001164507.2	ENSP00000416578.2
NEB	ENST00000409198.5	c.8738T>A	p.Ile2913Asn	missense_variant	62/150	5		ENSP00000386259.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461650 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727120

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.22
BayesDel_addAF	Benign	0.0045	T
BayesDel_noAF	Benign	-0.23
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.11	.;.;T;.;D;.;.
Eigen	Uncertain	0.34
Eigen_PC	Uncertain	0.28
FATHMM_MKL	Uncertain	0.79	D
LIST_S2	Uncertain	0.92	D;D;D;D;D;.;.
M_CAP	Benign	0.036	D
MetaRNN	Pathogenic	0.75	D;D;D;D;D;D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.2	M;M;.;M;M;M;M
PrimateAI	Benign	0.48	T
PROVEAN	Uncertain	-3.1	D;D;.;D;D;.;.
REVEL	Benign	0.25
Sift	Uncertain	0.0040	D;T;.;T;D;.;.
Sift4G	Pathogenic	0.0010	D;D;D;D;D;D;D
Polyphen		1.0	.;.;.;.;D;.;.
Vest4		0.79
MutPred		0.60		Gain of MoRF binding (P = 0.0624);Gain of MoRF binding (P = 0.0624);Gain of MoRF binding (P = 0.0624);Gain of MoRF binding (P = 0.0624);Gain of MoRF binding (P = 0.0624);Gain of MoRF binding (P = 0.0624);Gain of MoRF binding (P = 0.0624);
MVP		0.42
MPC		0.36
ClinPred		0.92	D
GERP RS		5.5
Varity_R		0.61
gMVP		0.38

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

LitVar

Other links and lift over

dbSNP: rs368373064; hg19: chr2-152496522;