2-151608681-A-G

Variant names:

• chr2-151608681-A-G
• rs1171513278
• NM_001164507.2:c.12331-5T>C

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_Strong BP6_Moderate

The NM_001164507.2(NEB):​c.12331-5T>C variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.000021 (0 hom., cov: 6)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: NEB NM_001164507.2 splice_region, intron
• Scores: Splicing: ADA: 0.0004438
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -3.40
• 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: Likely_benign. The variant received -6 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BP6: Variant 2-151608681-A-G is Benign according to our data. Variant chr2-151608681-A-G is described in ClinVar as Likely_benign. ClinVar VariationId is 534095.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEB	NM_001164507.2	c.12331-5T>C		splice_region_variant, intron_variant	Intron 81 of 181	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2	c.12331-5T>C		splice_region_variant, intron_variant	Intron 81 of 181	ENST00000397345.8	NP_001157980.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NEB	ENST00000397345.8	c.12331-5T>C		splice_region_variant, intron_variant	Intron 81 of 181	5	NM_001164508.2	ENSP00000380505.3
NEB	ENST00000427231.7	c.12331-5T>C		splice_region_variant, intron_variant	Intron 81 of 181	5	NM_001164507.2	ENSP00000416578.2
NEB	ENST00000409198.5	c.11601+1128T>C		intron_variant	Intron 78 of 149	5		ENSP00000386259.1

Frequencies

GnomAD3 genomes AF: 0.0000209 AC: 1 AN: 47880 Hom.: 0 Cov.: 6

Gnomad AFR AF: 0.0000625

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 19330 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 9876

African (AFR) AF: 0.00 AC: 0 AN: 1172

American (AMR) AF: 0.00 AC: 0 AN: 1130

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 920

East Asian (EAS) AF: 0.00 AC: 0 AN: 1872

South Asian (SAS) AF: 0.00 AC: 0 AN: 658

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 606

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 102

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 11602

Other (OTH) AF: 0.00 AC: 0 AN: 1268

GnomAD4 genome AF: 0.0000209 AC: 1 AN: 47880 Hom.: 0 Cov.: 6 AF XY: 0.00 AC XY: 0 AN XY: 21250

African (AFR) AF: 0.0000625 AC: 1 AN: 15988

American (AMR) AF: 0.00 AC: 0 AN: 3894

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 1512

East Asian (EAS) AF: 0.00 AC: 0 AN: 2018

South Asian (SAS) AF: 0.00 AC: 0 AN: 1426

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 1156

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 184

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 20776

Other (OTH) AF: 0.00 AC: 0 AN: 568

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Nemaline myopathy 2 Benign:1

Dec 20, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	6.4
DANN	Benign	0.71
PhyloP100		-3.4

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.00044
dbscSNV1_RF	Benign	0.018
SpliceAI score (max)		0.010		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: rs1171513278; hg19: chr2-152465195;