4-185502320-T-C

Position:

• chr4-185502320-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_014476.6(PDLIM3):​c.1069A>G​(p.Thr357Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: PDLIM3 NM_014476.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.52

Genes affected

PDLIM3 (HGNC:20767): (PDZ and LIM domain 3) The protein encoded by this gene contains a PDZ domain and a LIM domain, indicating that it may be involved in cytoskeletal assembly. In support of this, the encoded protein has been shown to bind the spectrin-like repeats of alpha-actinin-2 and to colocalize with alpha-actinin-2 at the Z lines of skeletal muscle. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. Aberrant alternative splicing of this gene may play a role in myotonic dystrophy. [provided by RefSeq, Apr 2012]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.10777831).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PDLIM3	NM_014476.6	c.1069A>G	p.Thr357Ala	missense_variant	8/8	ENST00000284767.12	NP_055291.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PDLIM3	ENST00000284767.12	c.1069A>G	p.Thr357Ala	missense_variant	8/8	5	NM_014476.6	ENSP00000284767	A1
	ENST00000671042.1	n.518-4181T>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Primary dilated cardiomyopathy;C0007194:Hypertrophic cardiomyopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 03, 2022

This sequence change replaces threonine, which is neutral and polar, with alanine, which is neutral and non-polar, at codon 357 of the PDLIM3 protein (p.Thr357Ala). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with PDLIM3-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The alanine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.063
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.61
CADD	Benign	16
DANN	Benign	0.95
DEOGEN2	Benign	0.059	T;.;.;.
Eigen	Benign	-0.58
Eigen_PC	Benign	-0.39
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.71	T;T;T;T
M_CAP	Benign	0.0040	T
MetaRNN	Benign	0.11	T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	-0.81	N;.;.;.
MutationTaster	Benign	1.0	D;N;N
PrimateAI	Benign	0.25	T
PROVEAN	Benign	-0.33	.;.;N;.
REVEL	Benign	0.042
Sift	Benign	0.12	.;.;T;.
Sift4G	Benign	0.13	.;.;T;.
Polyphen		0.0	B;.;B;.
Vest4		0.069
MutPred		0.28		Gain of glycosylation at T357 (P = 0.0115);.;.;.;
MVP		0.46
MPC		0.15
ClinPred		0.19	T
GERP RS		2.9
Varity_R		0.041
gMVP		0.28

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

Publications

LitVar

Other links and lift over

dbSNP: rs920811532; hg19: chr4-186423474;