2-151675365-A-G

Position:

• chr2-151675365-A-G

Variant summary

Our verdict is Benign. Variant got -15 ACMG points: 2P and 17B. PM2 BP4_Strong BP6_Very_Strong BP7 BS1

The NM_001164507.2(NEB):​c.3801T>C​(p.Asp1267=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000168 in 1,584,466 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00096 (1 hom., cov: 32)
  • Exomes 𝑓: 0.000084 (0 hom.)
• Consequence: NEB NM_001164507.2 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -0.646

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 Benign. Variant got -15 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.55).
• BP6: Variant 2-151675365-A-G is Benign according to our data. Variant chr2-151675365-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 389565.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-151675365-A-G is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=-0.646 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000958 (146/152346) while in subpopulation AFR AF= 0.00339 (141/41578). AF 95% confidence interval is 0.00293. There are 1 homozygotes in gnomad4. There are 59 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NEB	NM_001164507.2	c.3801T>C	p.Asp1267=	synonymous_variant	35/182	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2	c.3801T>C	p.Asp1267=	synonymous_variant	35/182	ENST00000397345.8	NP_001157980.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NEB	ENST00000397345.8	c.3801T>C	p.Asp1267=	synonymous_variant	35/182	5	NM_001164508.2	ENSP00000380505	P5
NEB	ENST00000427231.7	c.3801T>C	p.Asp1267=	synonymous_variant	35/182	5	NM_001164507.2	ENSP00000416578	A2
NEB	ENST00000409198.5	c.3801T>C	p.Asp1267=	synonymous_variant	35/150	5		ENSP00000386259

Frequencies

GnomAD3 genomes AF: 0.000946 AC: 144 AN: 152228 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.00335

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

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: 0.000478

GnomAD3 exomes AF: 0.000234 AC: 48 AN: 205012 Hom.: 1 AF XY: 0.000174 AC XY: 19 AN XY: 109226

Gnomad AFR exome AF: 0.00323

Gnomad AMR exome AF: 0.000237

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000838 AC: 120 AN: 1432120 Hom.: 0 Cov.: 30 AF XY: 0.0000705 AC XY: 50 AN XY: 709526

Gnomad4 AFR exome AF: 0.00281

Gnomad4 AMR exome AF: 0.000197

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: 0.00000183

Gnomad4 OTH exome AF: 0.000270

GnomAD4 genome AF: 0.000958 AC: 146 AN: 152346 Hom.: 1 Cov.: 32 AF XY: 0.000792 AC XY: 59 AN XY: 74500

Gnomad4 AFR AF: 0.00339

Gnomad4 AMR AF: 0.000261

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000326 Hom.: 0

Bravo AF: 0.00103

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 18, 2021	- -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Nemaline myopathy 2 Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 27, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.55
CADD	Benign	4.7
DANN	Benign	0.54

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: rs182725059; hg19: chr2-152531879;