8-143975344-C-T

Position:

chr8-143975344-C-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_000445.5(PLEC):c.26G>A(p.Arg9Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000847 in 1,610,290 control chromosomes in the GnomAD database, including 8 homozygotes. In-silico tool predicts a benign outcome for this variant. 11/13 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0043 ( 4 hom., cov: 32)

Exomes 𝑓: 0.00048 ( 4 hom. )

Consequence

PLEC
NM_000445.5 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 1.78

Variant links:

Genes affected

PLEC (HGNC:9069): (plectin) Plectin is a prominent member of an important family of structurally and in part functionally related proteins, termed plakins or cytolinkers, that are capable of interlinking different elements of the cytoskeleton. Plakins, with their multi-domain structure and enormous size, not only play crucial roles in maintaining cell and tissue integrity and orchestrating dynamic changes in cytoarchitecture and cell shape, but also serve as scaffolding platforms for the assembly, positioning, and regulation of signaling complexes (reviewed in PMID: 9701547, 11854008, and 17499243). Plectin is expressed as several protein isoforms in a wide range of cell types and tissues from a single gene located on chromosome 8 in humans (PMID: 8633055, 8698233). Until 2010, this locus was named plectin 1 (symbol PLEC1 in human; Plec1 in mouse and rat) and the gene product had been referred to as "hemidesmosomal protein 1" or "plectin 1, intermediate filament binding 500kDa". These names were superseded by plectin. The plectin gene locus in mouse on chromosome 15 has been analyzed in detail (PMID: 10556294, 14559777), revealing a genomic exon-intron organization with well over 40 exons spanning over 62 kb and an unusual 5' transcript complexity of plectin isoforms. Eleven exons (1-1j) have been identified that alternatively splice directly into a common exon 2 which is the first exon to encode plectin's highly conserved actin binding domain (ABD). Three additional exons (-1, 0a, and 0) splice into an alternative first coding exon (1c), and two additional exons (2alpha and 3alpha) are optionally spliced within the exons encoding the acting binding domain (exons 2-8). Analysis of the human locus has identified eight of the eleven alternative 5' exons found in mouse and rat (PMID: 14672974); exons 1i, 1j and 1h have not been confirmed in human. Furthermore, isoforms lacking the central rod domain encoded by exon 31 have been detected in mouse (PMID:10556294), rat (PMID: 9177781), and human (PMID: 11441066, 10780662, 20052759). The short alternative amino-terminal sequences encoded by the different first exons direct the targeting of the various isoforms to distinct subcellular locations (PMID: 14559777). As the expression of specific plectin isoforms was found to be dependent on cell type (tissue) and stage of development (PMID: 10556294, 12542521, 17389230) it appears that each cell type (tissue) contains a unique set (proportion and composition) of plectin isoforms, as if custom-made for specific requirements of the particular cells. Concordantly, individual isoforms were found to carry out distinct and specific functions (PMID: 14559777, 12542521, 18541706). In 1996, a number of groups reported that patients suffering from epidermolysis bullosa simplex with muscular dystrophy (EBS-MD) lacked plectin expression in skin and muscle tissues due to defects in the plectin gene (PMID: 8698233, 8941634, 8636409, 8894687, 8696340). Two other subtypes of plectin-related EBS have been described: EBS-pyloric atresia (PA) and EBS-Ogna. For reviews of plectin-related diseases see PMID: 15810881, 19945614. Mutations in the plectin gene related to human diseases should be named based on the position in NM_000445 (variant 1, isoform 1c), unless the mutation is located within one of the other alternative first exons, in which case the position in the respective Reference Sequence should be used. [provided by RefSeq, Aug 2011]

PLEC links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0031976402).

BP6

Variant 8-143975344-C-T is Benign according to our data. Variant chr8-143975344-C-T is described in ClinVar as [Benign]. Clinvar id is 471557.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00432 (658/152290) while in subpopulation AFR AF= 0.0152 (633/41552). AF 95% confidence interval is 0.0143. There are 4 homozygotes in gnomad4. There are 283 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	Protein	UniProt
PLEC	NM_000445.5 link	c.26G>A	p.Arg9Gln	missense_variant	2/33	NP_000436.2	Q15149-2
PLEC	NM_001410941.1 link	c.26G>A	p.Arg9Gln	missense_variant	2/32	NP_001397870.1
PLEC	XM_006716588.4 link	c.26G>A	p.Arg9Gln	missense_variant	2/34	XP_006716651.1
PLEC	XM_047421872.1 link	c.26G>A	p.Arg9Gln	missense_variant	2/33	XP_047277828.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	Protein	UniProt
PLEC	ENST00000436759.6 link	c.26G>A	p.Arg9Gln	missense_variant	2/33	1	ENSP00000388180.2	Q15149-2
PLEC	ENST00000528025.6 link	c.26G>A	p.Arg9Gln	missense_variant	1/34	5	ENSP00000437303.2	E9PMV1
PLEC	ENST00000527096.5 link	c.26G>A	p.Arg9Gln	missense_variant	1/32	5	ENSP00000434583.1	Q15149-3
PLEC	ENST00000527303.2 link	c.26G>A	p.Arg9Gln	missense_variant	2/32	3	ENSP00000433982.2	H0YDN1

Frequencies

GnomAD3 genomes

AF:

0.00431

AC:

656

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0152

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000785

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000103

Gnomad OTH

AF:

0.00239

GnomAD3 exomes

AF:

0.00115

AC:

283

AN:

246106

Hom.:

AF XY:

0.000910

AC XY:

122

AN XY:

134050

show subpopulations

Gnomad AFR exome

AF:

0.0153

Gnomad AMR exome

AF:

0.000725

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000800

Gnomad OTH exome

AF:

0.00133

GnomAD4 exome

AF:

0.000484

AC:

706

AN:

1458000

Hom.:

Cov.:

AF XY:

0.000448

AC XY:

325

AN XY:

725480

show subpopulations

Gnomad4 AFR exome

AF:

0.0160

Gnomad4 AMR exome

AF:

0.000783

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000696

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000387

Gnomad4 OTH exome

AF:

0.00124

GnomAD4 genome

AF:

0.00432

AC:

658

AN:

152290

Hom.:

Cov.:

AF XY:

0.00380

AC XY:

283

AN XY:

74476

show subpopulations

Gnomad4 AFR

AF:

0.0152

Gnomad4 AMR

AF:

0.000784

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000103

Gnomad4 OTH

AF:

0.00237

Alfa

AF:

0.00125

Hom.:

Bravo

AF:

0.00486

ESP6500AA

AF:

0.0134

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00147

AC:

178

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.000273

EpiControl

AF:

0.00

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Nov 10, 2017	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Feb 16, 2018

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Epidermolysis bullosa simplex, Ogna type;C2677349:Epidermolysis bullosa simplex 5C, with pyloric atresia;C2931072:Epidermolysis bullosa simplex 5B, with muscular dystrophy;C3150989:Autosomal recessive limb-girdle muscular dystrophy type 2Q;C4225309:Epidermolysis bullosa simplex with nail dystrophy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 24, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.26

CADD

Benign

DANN

Benign

0.89

DEOGEN2

Benign

0.016

.;.;.;T

Eigen

Benign

-0.85

Eigen_PC

Benign

-0.85

FATHMM_MKL

Benign

0.17

LIST_S2

Benign

0.69

T;T;T;T

MetaRNN

Benign

0.0032

T;T;T;T

MetaSVM

Benign

-0.53

PROVEAN

Benign

-0.060

N;.;N;N

REVEL

Benign

0.15

Sift

Pathogenic

0.0

D;.;D;D

Sift4G

Pathogenic

0.0

D;.;D;D

Polyphen

0.26

B;.;.;.

Vest4

0.34

MVP

0.69

ClinPred

0.055

GERP RS

3.2

Splicing

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over