rs121908339

chr10-86687107-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001368067.1(LDB3):c.383A>T(p.Lys128Met) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K128Q) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: LDB3 NM_001368067.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 7.19

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LDB3	NM_001368067.1	c.383A>T	p.Lys128Met	missense_variant	6/9	ENST00000263066.11
LDB3	NM_007078.3	c.690-4789A>T		intron_variant		ENST00000361373.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LDB3	ENST00000263066.11	c.383A>T	p.Lys128Met	missense_variant	6/9	1	NM_001368067.1
LDB3	ENST00000361373.9	c.690-4789A>T		intron_variant		1	NM_007078.3	P4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Dilated cardiomyopathy 1C Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Dec 03, 2003

- -

Cardiomyopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Jun 06, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.16	D
BayesDel_noAF	Uncertain	0.0
Cadd	Benign	21
Dann	Uncertain	1.0
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.49
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.93	D;.;D;D;D
M_CAP	Uncertain	0.26	D
MetaRNN	Uncertain	0.48	T;T;T;T;T
MetaSVM	Uncertain	0.57	D
MutationTaster	Benign	0.99	A;A;A;A;A;A;A;A;A;A
PROVEAN	Uncertain	-2.5	D;.;N;D;N
REVEL	Uncertain	0.60
Sift	Uncertain	0.0010	D;.;D;D;D
Sift4G	Uncertain	0.018	D;D;T;D;T
Polyphen		0.94, 1.0	.;.;P;D;D
Vest4		0.80
MutPred		0.37		.;.;Loss of ubiquitination at K128 (P = 0.0092);.;Loss of ubiquitination at K128 (P = 0.0092);
MVP		0.81
MPC		0.89
ClinPred		0.98	D
GERP RS		5.0
gMVP		0.84

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs121908339; hg19: chr10-88446864;