2-151498288-ACT-A

Variant names:

• chr2-151498288-ACT-A
• rs1266535163
• NM_001164507.2:c.24177_24178delAG

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1 PP5_Very_Strong

The NM_001164508.2(NEB):​c.24177_24178delAG​(p.Arg8059SerfsTer9) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000451 in 1,551,146 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. R8059R) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000043 (0 hom.)
• Consequence: NEB NM_001164508.2 frameshift
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:8
• Conservation: PhyloP100: 2.07
• 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]

RIF1 (HGNC:23207): (replication timing regulatory factor 1) This gene encodes a protein that shares homology with the yeast teleomere binding protein, Rap1 interacting factor 1. This protein localizes to aberrant telomeres may be involved in DNA repair. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Apr 2010]

ACMG classification

Our verdict: Pathogenic. The variant received 16 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PP5: Variant 2-151498288-ACT-A is Pathogenic according to our data. Variant chr2-151498288-ACT-A is described in ClinVar as Pathogenic. ClinVar VariationId is 550775.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

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.24177_24178delAG	p.Arg8059SerfsTer9	frameshift	Exon 170 of 182	NP_001157979.2	P20929-3
	NEB	NM_001164508.2	MANE Select	c.24177_24178delAG	p.Arg8059SerfsTer9	frameshift	Exon 170 of 182	NP_001157980.2	P20929-2
	NEB	NM_001271208.2		c.24282_24283delAG	p.Arg8094SerfsTer9	frameshift	Exon 171 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.24177_24178delAG	p.Arg8059SerfsTer9	frameshift	Exon 170 of 182	ENSP00000380505.3	P20929-2
	NEB	ENST00000427231.7	TSL:5 MANE Plus Clinical	c.24177_24178delAG	p.Arg8059SerfsTer9	frameshift	Exon 170 of 182	ENSP00000416578.2	P20929-3
	NEB	ENST00000397337.6	TSL:5	c.576_577delAG	p.Arg192fs	frameshift	Exon 7 of 19	ENSP00000380498.2	H0Y3P5

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151880 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000429 AC: 6 AN: 1399266 Hom.: 0 AF XY: 0.00000145 AC XY: 1 AN XY: 690148

African (AFR) AF: 0.00 AC: 0 AN: 31598

American (AMR) AF: 0.00 AC: 0 AN: 35702

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25178

East Asian (EAS) AF: 0.00 AC: 0 AN: 35730

South Asian (SAS) AF: 0.00 AC: 0 AN: 79232

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49280

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5694

European-Non Finnish (NFE) AF: 0.00000556 AC: 6 AN: 1078856

Other (OTH) AF: 0.00 AC: 0 AN: 57996

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151880 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74156

African (AFR) AF: 0.00 AC: 0 AN: 41346

American (AMR) AF: 0.00 AC: 0 AN: 15240

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

South Asian (SAS) AF: 0.00 AC: 0 AN: 4804

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10574

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 67958

Other (OTH) AF: 0.00 AC: 0 AN: 2084

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
4	-	-	Nemaline myopathy 2 (4)
2	-	-	not provided (2)
1	-	-	Nemaline myopathy (1)
1	-	-	Nemaline myopathy 2;C5543431:Arthrogryposis multiplex congenita 6 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		2.1
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.29		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.29		Position offset: -28

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1266535163; hg19: chr2-152354802;