8-143920740-C-T
Variant names:
Variant summary
Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_StrongBP6BP7BS1BS2
The NM_201384.3(PLEC):c.9081G>A(p.Ala3027Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00138 in 1,604,640 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.00092 ( 1 hom., cov: 33)
Exomes 𝑓: 0.0014 ( 2 hom. )
Consequence
PLEC
NM_201384.3 synonymous
NM_201384.3 synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: -4.91
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 These names were superseded by plectin.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]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -14 ACMG points.
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.95).
BP6
Variant 8-143920740-C-T is Benign according to our data. Variant chr8-143920740-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 284283.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=1}.
BP7
Synonymous conserved (PhyloP=-4.91 with no splicing effect.
BS1
Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000919 (140/152352) while in subpopulation AMR AF= 0.00216 (33/15308). AF 95% confidence interval is 0.00158. There are 1 homozygotes in gnomad4. There are 66 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
BS2
High Homozygotes in GnomAdExome4 at 2 AR gene
Transcripts
RefSeq
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| PLEC | ENST00000345136.8 | c.9081G>A | p.Ala3027Ala | synonymous_variant | Exon 32 of 32 | 1 | NM_201384.3 | ENSP00000344848.3 | ||
| PLEC | ENST00000356346.7 | c.9039G>A | p.Ala3013Ala | synonymous_variant | Exon 32 of 32 | 1 | NM_201378.4 | ENSP00000348702.3 |
Frequencies
GnomAD3 genomes 0.000920 AC: 140AN: 152234Hom.: 1 Cov.: 33
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GnomAD3 exomes AF: 0.000913 AC: 217AN: 237700Hom.: 1 AF XY: 0.000887 AC XY: 116AN XY: 130830
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GnomAD4 exome AF: 0.00143 AC: 2077AN: 1452288Hom.: 2 Cov.: 75 AF XY: 0.00136 AC XY: 984AN XY: 722942
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GnomAD4 genome 0.000919 AC: 140AN: 152352Hom.: 1 Cov.: 33 AF XY: 0.000886 AC XY: 66AN XY: 74500
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:3Benign:4
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
not provided Uncertain:3Benign:2
-
Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)
Significance: Uncertain significance
Review Status: no assertion criteria provided
Collection Method: clinical testing
- -
Nov 13, 2017
Eurofins Ntd Llc (ga)
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing
- -
Dec 27, 2019
GeneDx
Significance: Likely benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing
- -
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Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center
Significance: Uncertain significance
Review Status: no assertion criteria provided
Collection Method: clinical testing
- -
Feb 01, 2023
CeGaT Center for Human Genetics Tuebingen
Significance: Likely benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing
PLEC: BP4, BP7 -
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
Jan 28, 2025
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Likely benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing
- -
PLEC-related disorder Benign:1
Nov 14, 2023
PreventionGenetics, part of Exact Sciences
Significance: Likely benign
Review Status: no assertion criteria provided
Collection Method: clinical testing
This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Computational scores
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Name
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BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
RBP_binding_hub_radar
RBP_regulation_power_radar
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Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at