8-143924900-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_201384.3(PLEC):c.5029G>A(p.Gly1677Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000142 in 1,587,230 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 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. G1677V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 35)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

PLEC
NM_201384.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:3

Conservation

PhyloP100: 0.812

Publications

3 publications found

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 These names were superseded by plectin.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 Gene-Disease associations (from GenCC):

epidermolysis bullosa simplex
Inheritance: AD Classification: STRONG Submitted by: G2P
epidermolysis bullosa simplex 5A, Ogna type
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, PanelApp Australia, Genomics England PanelApp
autosomal recessive limb-girdle muscular dystrophy type 2Q
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)
congenital myasthenic syndrome
Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp
epidermolysis bullosa simplex 5B, with muscular dystrophy
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Orphanet, Genomics England PanelApp
epidermolysis bullosa simplex 5C, with pyloric atresia
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
epidermolysis bullosa simplex with nail dystrophy
Inheritance: AR Classification: STRONG Submitted by: PanelApp Australia
autosomal recessive limb-girdle muscular dystrophy
Inheritance: AR Classification: MODERATE Submitted by: ClinGen
aplasia cutis congenita
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
cholestasis
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

PLEC links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.04997641).

BP6

Variant 8-143924900-C-T is Benign according to our data. Variant chr8-143924900-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 374567.

BS1

Variant frequency is greater than expected in population eas. GnomAdExome4 allele frequency = 0.000139 (199/1434964) while in subpopulation EAS AF = 0.00364 (142/39044). AF 95% confidence interval is 0.00315. There are 0 homozygotes in GnomAdExome4. There are 82 alleles in the male GnomAdExome4 subpopulation. Median coverage is 68. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLEC	NM_201384.3 link	c.5029G>A	p.Gly1677Ser	missense_variant	Exon 31 of 32	ENST00000345136.8	NP_958786.1	Q15149-4
PLEC	NM_201378.4 link	c.4987G>A	p.Gly1663Ser	missense_variant	Exon 31 of 32	ENST00000356346.7	NP_958780.1	Q15149-9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PLEC	ENST00000345136.8 link	c.5029G>A	p.Gly1677Ser	missense_variant	Exon 31 of 32	1	NM_201384.3	ENSP00000344848.3		Q15149-4
PLEC	ENST00000356346.7 link	c.4987G>A	p.Gly1663Ser	missense_variant	Exon 31 of 32	1	NM_201378.4	ENSP00000348702.3		Q15149-9

Frequencies

GnomAD3 genomes

AF:

0.000177

AC:

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000434

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000772

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000221

AC:

AN:

203192

AF XY:

0.000203

show subpopulations

Gnomad AFR exome

AF:

0.000783

Gnomad AMR exome

AF:

0.0000907

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00175

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000221

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000139

AC:

199

AN:

1434964

Hom.:

Cov.:

AF XY:

0.000115

AC XY:

AN XY:

713192

show subpopulations

African (AFR)

AF:

0.000786

AC:

AN:

33066

American (AMR)

AF:

0.0000911

AC:

AN:

43930

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25818

East Asian (EAS)

AF:

0.00364

AC:

142

AN:

39044

South Asian (SAS)

AF:

0.0000118

AC:

AN:

84600

European-Finnish (FIN)

AF:

0.0000272

AC:

AN:

36740

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5696

European-Non Finnish (NFE)

AF:

0.0000190

AC:

AN:

1106440

Other (OTH)

AF:

0.0000671

AC:

AN:

59630

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000177

AC:

AN:

152266

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74460

show subpopulations

African (AFR)

AF:

0.000433

AC:

AN:

41560

American (AMR)

AF:

0.000131

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000775

AC:

AN:

5162

South Asian (SAS)

AF:

0.000207

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68000

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.514

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.000181

ESP6500AA

AF:

0.000555

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000185

AC:

Asia WGS

AF:

0.000579

AC:

AN:

3468

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:2

Mar 25, 2021

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 31, 2016

CeGaT Center for Human Genetics Tuebingen

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dec 11, 2017

Athena Diagnostics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Mar 01, 2022

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Uncertain:1

Jun 22, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.5110G>A (p.G1704S) alteration is located in exon 32 (coding exon 31) of the PLEC gene. This alteration results from a G to A substitution at nucleotide position 5110, causing the glycine (G) at amino acid position 1704 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

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

Dec 06, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.092

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.45

CADD

Benign

(source)

DANN

Benign

0.96

DEOGEN2

Benign

0.081

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

Eigen

Benign

-0.49

Eigen_PC

Benign

-0.35

FATHMM_MKL

Benign

0.61

LIST_S2

Uncertain

0.93

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

M_CAP

Pathogenic

0.73

MetaRNN

Benign

0.050

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

MetaSVM

Benign

-0.87

MutationAssessor

Benign

-0.76

.;.;.;.;N;.;.;.;.

PhyloP100

0.81

PrimateAI

Uncertain

0.78

PROVEAN

Benign

-0.97

N;N;N;N;N;N;N;N;N

REVEL

Benign

0.093

Sift

Benign

0.22

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

Sift4G

Benign

0.60

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

Polyphen

0.22

B;P;B;B;B;B;B;B;.

Vest4

0.16

MVP

0.62

ClinPred

0.010

GERP RS

3.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.047

gMVP

0.35

Mutation Taster

=78/22

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over