rs774726264

Variant names:

• chr2-151602602-G-A
• rs774726264
• NM_001164507.2:c.13353C>T

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_Strong BP6_Very_Strong BP7

The NM_001271208.2(NEB):​c.13353C>T​(p.Ala4451Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.091 (1 hom., cov: 0)
  • Exomes 𝑓: 0.44 (197 hom.)
  • Failed GnomAD Quality Control
• Consequence: NEB NM_001271208.2 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:9
• Conservation: PhyloP100: -1.79
• Publications: 1 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: Benign. The variant received -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BP6: Variant 2-151602602-G-A is Benign according to our data. Variant chr2-151602602-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 227727.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-1.79 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001271208.2. 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.13353C>T	p.Ala4451Ala	synonymous	Exon 87 of 182	NP_001157979.2
	NEB	NM_001164508.2	MANE Select	c.13353C>T	p.Ala4451Ala	synonymous	Exon 87 of 182	NP_001157980.2
	NEB	NM_001271208.2		c.13353C>T	p.Ala4451Ala	synonymous	Exon 87 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.13353C>T	p.Ala4451Ala	synonymous	Exon 87 of 182	ENSP00000380505.3
	NEB	ENST00000427231.7	TSL:5 MANE Plus Clinical	c.13353C>T	p.Ala4451Ala	synonymous	Exon 87 of 182	ENSP00000416578.2
	NEB	ENST00000409198.5	TSL:5	c.11601+7207C>T		intron	N/A	ENSP00000386259.1

Frequencies

GnomAD3 genomes AF: 0.0909 AC: 2 AN: 22 Hom.: 1 Cov.: 0

Gnomad AFR 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: 1.00

Gnomad NFE AF: 0.00

GnomAD2 exomes AF: 0.333 AC: 2 AN: 6 AF XY: 0.333

Gnomad AFR exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 1.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.445 AC: 418 AN: 940 Hom.: 197 Cov.: 0 AF XY: 0.435 AC XY: 220 AN XY: 506

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.250 AC: 1 AN: 4

American (AMR) AF: 0.0400 AC: 2 AN: 50

Ashkenazi Jewish (ASJ) AC: 0 AN: 0

East Asian (EAS) AF: 0.00 AC: 0 AN: 130

South Asian (SAS) AF: 0.0568 AC: 5 AN: 88

European-Finnish (FIN) AF: 0.982 AC: 383 AN: 390

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.0968 AC: 24 AN: 248

Other (OTH) AF: 0.100 AC: 3 AN: 30

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.0909 AC: 2 AN: 22 Hom.: 1 Cov.: 0 AF XY: 0.167 AC XY: 2 AN XY: 12

African (AFR) AF: 0.00 AC: 0 AN: 2

American (AMR) AF: 0.00 AC: 0 AN: 2

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2

East Asian (EAS) AF: 0.00 AC: 0 AN: 6

South Asian (SAS) AF: 0.00 AC: 0 AN: 2

European-Finnish (FIN) AF: 1.00 AC: 2 AN: 2

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 6

Other (OTH) AC: 0 AN: 0

Alfa AF: 0.483 Hom.: 644

ClinVar

ClinVar submissions as Germline

Significance: Benign/Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	5	not provided (5)
-	-	2	Nemaline myopathy 2 (2)
-	-	2	not specified (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	3.3
DANN	Benign	0.35
PhyloP100		-1.8
Mutation Taster		=100/0	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: rs774726264; hg19: chr2-152459116; COSMIC: COSV99417924;