rs200887085

Positions:

chr8-143931601-C-T

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_201384.3(PLEC):c.2237G>A(p.Arg746His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00122 in 1,600,074 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R746C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0015 ( 1 hom., cov: 33)

Exomes 𝑓: 0.0012 ( 1 hom. )

Consequence

PLEC
NM_201384.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:4

Conservation

PhyloP100: 0.264

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 These names were superseded by plectin.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 -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.017091334).

BP6

Variant 8-143931601-C-T is Benign according to our data. Variant chr8-143931601-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 195001.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=4, Uncertain_significance=1}. Variant chr8-143931601-C-T is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.00146 (223/152324) while in subpopulation AMR AF= 0.00425 (65/15304). AF 95% confidence interval is 0.00342. There are 1 homozygotes in gnomad4. There are 114 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PLEC	NM_201384.3 linkuse as main transcript	c.2237G>A	p.Arg746His	missense_variant	19/32	ENST00000345136.8
PLEC	NM_201378.4 linkuse as main transcript	c.2195G>A	p.Arg732His	missense_variant	19/32	ENST00000356346.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PLEC	ENST00000345136.8 linkuse as main transcript	c.2237G>A	p.Arg746His	missense_variant	19/32	1	NM_201384.3		Q15149-4
PLEC	ENST00000356346.7 linkuse as main transcript	c.2195G>A	p.Arg732His	missense_variant	19/32	1	NM_201378.4		Q15149-9

Frequencies

GnomAD3 genomes

AF:

0.00147

AC:

223

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00198

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00425

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00104

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.000885

AC:

197

AN:

222566

Hom.:

AF XY:

0.000811

AC XY:

AN XY:

120772

show subpopulations

Gnomad AFR exome

AF:

0.00141

Gnomad AMR exome

AF:

0.00153

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000536

Gnomad NFE exome

AF:

0.00122

Gnomad OTH exome

AF:

0.00128

GnomAD4 exome

AF:

0.00120

AC:

1732

AN:

1447750

Hom.:

Cov.:

AF XY:

0.00106

AC XY:

759

AN XY:

718768

show subpopulations

Gnomad4 AFR exome

AF:

0.00114

Gnomad4 AMR exome

AF:

0.00149

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000119

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00142

Gnomad4 OTH exome

AF:

0.00100

GnomAD4 genome

AF:

0.00146

AC:

223

AN:

152324

Hom.:

Cov.:

AF XY:

0.00153

AC XY:

114

AN XY:

74494

show subpopulations

Gnomad4 AFR

AF:

0.00197

Gnomad4 AMR

AF:

0.00425

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00104

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.00111

Hom.:

Bravo

AF:

0.00149

ESP6500AA

AF:

0.00120

AC:

ESP6500EA

AF:

0.000946

AC:

ExAC

AF:

0.000766

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 31, 2017	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. -
Likely benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 05, 2015	- -

not provided

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Apr 14, 2020	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Oct 01, 2023	PLEC: BS1 -

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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 18, 2024

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 773 of the PLEC protein (p.Arg773His). This variant is present in population databases (rs200887085, gnomAD 0.2%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with PLEC-related conditions. ClinVar contains an entry for this variant (Variation ID: 195001). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Not Available"; Align-GVGD: "Not Available". The histidine 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

0.072

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.21

CADD

Benign

DANN

Benign

0.93

DEOGEN2

Benign

0.25

.;.;.;.;T;.;.;.;.;.

Eigen

Benign

-0.56

Eigen_PC

Benign

-0.53

FATHMM_MKL

Benign

0.15

LIST_S2

Uncertain

0.89

D;D;D;D;D;D;D;D;D;D

M_CAP

Pathogenic

0.43

MetaRNN

Benign

0.017

T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

0.20

MutationAssessor

Benign

1.7

.;.;.;.;L;.;.;.;.;.

MutationTaster

Benign

0.94

D;D;D;D;D;D;D;D;D

PrimateAI

Benign

0.47

PROVEAN

Uncertain

-3.1

D;D;D;D;D;D;D;D;.;D

REVEL

Benign

0.20

Sift

Uncertain

0.019

D;D;D;D;D;D;D;D;.;D

Sift4G

Uncertain

0.047

D;D;T;D;T;D;D;D;.;D

Polyphen

0.0020

B;B;B;B;B;B;B;B;.;.

Vest4

0.20

MVP

0.64

ClinPred

0.030

GERP RS

2.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.097

gMVP

0.34

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

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