chr2-151591348-A-G

Variant names:

• chr2-151591348-A-G
• rs886038443
• NM_001164507.2:c.14934T>C

Variant summary

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

The NM_001164508.2(NEB):​c.14934T>C​(p.Asp4978Asp) variant causes a splice region, synonymous 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 0.000033 (0 hom., cov: 30)
  • Exomes 𝑓: 0.000026 (2 hom.)
  • Failed GnomAD Quality Control
• Consequence: NEB NM_001164508.2 splice_region, synonymous
• Scores: Splicing: ADA: 0.00005789
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -2.08
• 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: Benign. The variant received -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.5).
• BP6: Variant 2-151591348-A-G is Benign according to our data. Variant chr2-151591348-A-G is described in ClinVar as Likely_benign. ClinVar VariationId is 257750.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-2.08 with no splicing effect.

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.14934T>C	p.Asp4978Asp	splice_region synonymous	Exon 96 of 182	NP_001157979.2
	NEB	NM_001164508.2	MANE Select	c.14934T>C	p.Asp4978Asp	splice_region synonymous	Exon 96 of 182	NP_001157980.2
	NEB	NM_001271208.2		c.14934T>C	p.Asp4978Asp	splice_region synonymous	Exon 96 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.14934T>C	p.Asp4978Asp	splice_region synonymous	Exon 96 of 182	ENSP00000380505.3
	NEB	ENST00000427231.7	TSL:5 MANE Plus Clinical	c.14934T>C	p.Asp4978Asp	splice_region synonymous	Exon 96 of 182	ENSP00000416578.2
	NEB	ENST00000409198.5	TSL:5	c.11602-14994T>C		intron	N/A	ENSP00000386259.1

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 151754 Hom.: 0 Cov.: 30

Gnomad AFR AF: 0.000122

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

GnomAD2 exomes AF: 0.000151 AC: 24 AN: 158922 AF XY: 0.0000835

Gnomad AFR exome AF: 0.00234

Gnomad AMR exome AF: 0.0000807

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000161

Gnomad OTH exome AF: 0.000223

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000265 AC: 37 AN: 1396650 Hom.: 2 Cov.: 33 AF XY: 0.0000189 AC XY: 13 AN XY: 688874

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

African (AFR) AF: 0.000834 AC: 26 AN: 31184

American (AMR) AF: 0.0000560 AC: 2 AN: 35722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25154

East Asian (EAS) AF: 0.00 AC: 0 AN: 35732

South Asian (SAS) AF: 0.0000126 AC: 1 AN: 79084

European-Finnish (FIN) AF: 0.0000203 AC: 1 AN: 49340

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4106

European-Non Finnish (NFE) AF: 0.00000649 AC: 7 AN: 1078480

Other (OTH) AF: 0.00 AC: 0 AN: 57848

⚠️ 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: 0.0000329 AC: 5 AN: 151874 Hom.: 0 Cov.: 30 AF XY: 0.0000404 AC XY: 3 AN XY: 74254

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

African (AFR) AF: 0.000121 AC: 5 AN: 41168

American (AMR) AF: 0.00 AC: 0 AN: 15296

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5186

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67986

Other (OTH) AF: 0.00 AC: 0 AN: 2110

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.000432 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	not specified (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.50
CADD	Benign	2.8
DANN	Benign	0.70
PhyloP100		-2.1
Mutation Taster		=40/60	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000058
dbscSNV1_RF	Benign	0.048
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: rs886038443; hg19: chr2-152447862; COSMIC: COSV108770497;