chr10-20852540-TG-CA

Variant names:

• chr10-20852540-TG-CA
• rs386741736
• NM_006393.3:c.1008+4_1008+5delCAinsTG

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP6_Very_Strong

The NM_006393.3(NEBL):​c.1008+4_1008+5delCAinsTG variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: NEBL NM_006393.3 splice_region, intron
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.412
• Publications: 0 publications found

Genes affected

NEBL (HGNC:16932): (nebulette) This gene encodes a nebulin like protein that is abundantly expressed in cardiac muscle. The encoded protein binds actin and interacts with thin filaments and Z-line associated proteins in striated muscle. This protein may be involved in cardiac myofibril assembly. A shorter isoform of this protein termed LIM nebulette is expressed in non-muscle cells and may function as a component of focal adhesion complexes. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Mar 2010]

NEBL Gene-Disease associations (from GenCC):

• dilated cardiomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

LOC102725112 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• BP6: Variant 10-20852540-TG-CA is Benign according to our data. Variant chr10-20852540-TG-CA is described in ClinVar as [Likely_benign]. Clinvar id is 240644.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEBL	NM_006393.3	c.1008+4_1008+5delCAinsTG		splice_region_variant, intron_variant	Intron 10 of 27	ENST00000377122.9	NP_006384.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NEBL	ENST00000377122.9	c.1008+4_1008+5delCAinsTG		splice_region_variant, intron_variant	Intron 10 of 27	1	NM_006393.3	ENSP00000366326.4

Frequencies

GnomAD3 genomes Cov.: 31

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 31

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:1

Dec 11, 2023

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: NEBL c.1008+4_1008+5delinsTG alters a nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. The variant is a multinucleotide combination of c.1008+5A>G and c.1008+4C>T. Consensus agreement among computation tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.0016 in 281582 control chromosomes in the gnomAD database, including 3 homozygotes. The observed variant frequency is approximately 207.74 fold of the estimated maximal expected allele frequency for a pathogenic variant in NEBL causing Dilated Cardiomyopathy phenotype (7.8e-06), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.1008+4_1008+5delinsTG in individuals affected with Dilated Cardiomyopathy and no experimental evidence demonstrating its impact on protein function have been reported. One submitter has cited clinical-significance assessments for this variant to ClinVar after 2014 and has classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign. -

Primary dilated cardiomyopathy Benign:1

Jan 29, 2025

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
PhyloP100		-0.41

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs386741736; hg19: chr10-21141469;