2-151603614-G-T

Variant names:

• chr2-151603614-G-T
• rs1553867144
• NM_001164507.2:c.13218C>A

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_001164507.2(NEB):​c.13218C>A​(p.Thr4406Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. T4406T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 21)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: NEB NM_001164507.2 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter U:1 B:1
• Conservation: PhyloP100: -5.12
• 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 -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BP6: Variant 2-151603614-G-T is Benign according to our data. Variant chr2-151603614-G-T is described in ClinVar as Likely_benign. ClinVar VariationId is 991537.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-5.12 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEB	NM_001164507.2	c.13218C>A	p.Thr4406Thr	synonymous_variant	Exon 86 of 182	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2	c.13218C>A	p.Thr4406Thr	synonymous_variant	Exon 86 of 182	ENST00000397345.8	NP_001157980.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NEB	ENST00000397345.8	c.13218C>A	p.Thr4406Thr	synonymous_variant	Exon 86 of 182	5	NM_001164508.2	ENSP00000380505.3
NEB	ENST00000427231.7	c.13218C>A	p.Thr4406Thr	synonymous_variant	Exon 86 of 182	5	NM_001164507.2	ENSP00000416578.2
NEB	ENST00000409198.5	c.11601+6195C>A		intron_variant	Intron 78 of 149	5		ENSP00000386259.1

Frequencies

GnomAD3 genomes Cov.: 21

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1396662 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 688872

African (AFR) AF: 0.00 AC: 0 AN: 31258

American (AMR) AF: 0.00 AC: 0 AN: 35696

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 35736

South Asian (SAS) AF: 0.00 AC: 0 AN: 79136

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49278

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4066

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1078516

Other (OTH) AF: 0.00 AC: 0 AN: 57798

GnomAD4 genome Cov.: 21

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Nemaline myopathy 2 Uncertain:1 Benign:1

Aug 13, 2020

Natera, Inc.

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Sep 03, 2022

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	-0.81
CADD	Benign	0.43
DANN	Benign	0.44
PhyloP100		-5.1
Mutation Taster		=99/1	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: rs1553867144; hg19: chr2-152460128;