chr2-151650355-A-T

Variant names:

• chr2-151650355-A-T
• rs780437384
• NM_001164507.2:c.7252T>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 1P and 1B. PP3 BP6

The NM_001164508.2(NEB):​c.7252T>A​(p.Trp2418Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000198 in 1,461,586 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000020 (0 hom.)
• Consequence: NEB NM_001164508.2 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:1
• Conservation: PhyloP100: 2.94
• 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: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae), Myriad Women’s Health, ClinGen
• autosomal dominant nebulin-related myopathy

  Inheritance: AD Classification: MODERATE Submitted by: ClinGen
• 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.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.749
• BP6: Variant 2-151650355-A-T is Benign according to our data. Variant chr2-151650355-A-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 426583.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001164508.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NEB	NM_001164507.2	MANE Plus Clinical	c.7252T>A	p.Trp2418Arg	missense	Exon 54 of 182	NP_001157979.2	P20929-3
	NEB	NM_001164508.2	MANE Select	c.7252T>A	p.Trp2418Arg	missense	Exon 54 of 182	NP_001157980.2	P20929-2
	NEB	NM_001271208.2		c.7252T>A	p.Trp2418Arg	missense	Exon 54 of 183	NP_001258137.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NEB	ENST00000397345.8	TSL:5 MANE Select	c.7252T>A	p.Trp2418Arg	missense	Exon 54 of 182	ENSP00000380505.3	P20929-2
	NEB	ENST00000427231.7	TSL:5 MANE Plus Clinical	c.7252T>A	p.Trp2418Arg	missense	Exon 54 of 182	ENSP00000416578.2	P20929-3
	NEB	ENST00000409198.5	TSL:5	c.7252T>A	p.Trp2418Arg	missense	Exon 54 of 150	ENSP00000386259.1	P20929-4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000321 AC: 8 AN: 248858 AF XY: 0.0000370

Gnomad AFR exome AF: 0.0000646

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000621

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000198 AC: 29 AN: 1461586 Hom.: 0 Cov.: 31 AF XY: 0.0000193 AC XY: 14 AN XY: 727086

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44702

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39692

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53392

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000243 AC: 27 AN: 1111806

Other (OTH) AF: 0.0000331 AC: 2 AN: 60364

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000624 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.0000497 AC: 6

EpiCase AF: 0.0000545

EpiControl AF: 0.000237

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	1	Nemaline myopathy 2 (2)
-	2	-	not provided (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.92
BayesDel_addAF	Benign	-0.012	T
BayesDel_noAF	Uncertain	-0.070
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.17	T
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.37
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.85	D
M_CAP	Benign	0.048	D
MetaRNN	Pathogenic	0.75	D
MetaSVM	Benign	-0.42	T
MutationAssessor	Pathogenic	3.6	H
PhyloP100		2.9
PrimateAI	Uncertain	0.67	T
PROVEAN	Pathogenic	-4.9	D
REVEL	Uncertain	0.41
Sift	Uncertain	0.0010	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.73
MutPred		0.60		Loss of catalytic residue at L2416 (P = 0.0048)
MVP		0.60
MPC		0.43
ClinPred		0.47	T
GERP RS		4.2
Varity_R		0.79
gMVP		0.60
Mutation Taster		=58/42	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: rs780437384; hg19: chr2-152506869;