NM_007078.3:c.1609delC

Variant names:

• chr10-86716702-TC-T
• rs727503129
• NM_007078.3:c.1609delC

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PVS1

The NM_007078.3(LDB3):​c.1609delC​(p.Gln537ArgfsTer28) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000434 in 1,613,478 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. Q537Q) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: LDB3 NM_007078.3 frameshift
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1 U:5
• Conservation: PhyloP100: 0.0230
• Publications: 0 publications found

Genes affected

LDB3 (HGNC:15710): (LIM domain binding 3) This gene encodes a PDZ domain-containing protein. PDZ motifs are modular protein-protein interaction domains consisting of 80-120 amino acid residues. PDZ domain-containing proteins interact with each other in cytoskeletal assembly or with other proteins involved in targeting and clustering of membrane proteins. The protein encoded by this gene interacts with alpha-actinin-2 through its N-terminal PDZ domain and with protein kinase C via its C-terminal LIM domains. The LIM domain is a cysteine-rich motif defined by 50-60 amino acids containing two zinc-binding modules. This protein also interacts with all three members of the myozenin family. Mutations in this gene have been associated with myofibrillar myopathy and dilated cardiomyopathy. Alternatively spliced transcript variants encoding different isoforms have been identified; all isoforms have N-terminal PDZ domains while only longer isoforms (1, 2 and 5) have C-terminal LIM domains. [provided by RefSeq, Jan 2010]

LDB3 Gene-Disease associations (from GenCC):

• dilated cardiomyopathy

  Inheritance: AD, AR Classification: STRONG, LIMITED Submitted by: ClinGen
• myofibrillar myopathy 4

  Inheritance: AD Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• familial isolated dilated cardiomyopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial dilated cardiomyopathy

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics
• arrhythmogenic right ventricular cardiomyopathy

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_007078.3. 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
	LDB3	NM_007078.3	MANE Select	c.1609delC	p.Gln537ArgfsTer28	frameshift	Exon 10 of 14	NP_009009.1	O75112-1
	LDB3	NM_001171610.2		c.1624delC	p.Gln542ArgfsTer28	frameshift	Exon 10 of 14	NP_001165081.1	O75112-7
	LDB3	NM_001368066.1		c.1468delC	p.Gln490ArgfsTer28	frameshift	Exon 11 of 15	NP_001354995.1	A0A8I5KV04

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LDB3	ENST00000361373.9	TSL:1 MANE Select	c.1609delC	p.Gln537ArgfsTer28	frameshift	Exon 10 of 14	ENSP00000355296.3	O75112-1
	LDB3	ENST00000945680.1		c.1813delC	p.Gln605ArgfsTer28	frameshift	Exon 10 of 14	ENSP00000615739.1
	LDB3	ENST00000871464.1		c.1750delC	p.Gln584ArgfsTer28	frameshift	Exon 11 of 15	ENSP00000541523.1

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 151974 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

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: 0.0000588

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461504 Hom.: 0 Cov.: 36 AF XY: 0.00000138 AC XY: 1 AN XY: 727062

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44710

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26120

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53116

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111976

Other (OTH) AF: 0.00 AC: 0 AN: 60384

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 151974 Hom.: 0 Cov.: 31 AF XY: 0.0000539 AC XY: 4 AN XY: 74224

African (AFR) AF: 0.00 AC: 0 AN: 41374

American (AMR) AF: 0.00 AC: 0 AN: 15260

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5164

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10592

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000588 AC: 4 AN: 67980

Other (OTH) AF: 0.00 AC: 0 AN: 2084

Alfa AF: 0.000214 Hom.: 0

Bravo AF: 0.0000113

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	2	-	not specified (2)
-	1	-	Cardiomyopathy (1)
-	1	-	Cardiovascular phenotype (1)
1	-	-	Myofibrillar myopathy 4 (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.023
Mutation Taster		=12/188	disease causing (ClinVar)

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: rs727503129; hg19: chr10-88476459;