Interlinks intermediate filaments with microtubules and microfilaments and anchors intermediate filaments to desmosomes or hemidesmosomes. Could also bind muscle proteins such as actin to membrane complexes in muscle. May be involved not only in the filaments network, but also in the regulation of their dynamics. Structural component of muscle. Isoform 9 plays a major role in the maintenance of myofiber integrity. Homodimer or homotetramer. Interacts (via actin-binding domain) with SYNE3. Interacts (via calponin-homology (CH) 1 domain) with VIM (via rod region) (By similarity). Interacts (via N-terminus) with DST isoform 2 (via N-terminus) (PubMed:19932097). Interacts with FER. Interacts with TOR1A (PubMed:18827015). Interacts with ANK3 (PubMed:21223964). Identified in complexes that contain VIM, EZR, AHNAK, BFSP1, BFSP2, ANK2, PLEC, PRX and spectrin (By similarity). Interacts with COL17A1 (PubMed:12482924). Interacts with KRT14, heterodimers consisting of KRT8 and KRT18, heterodimers consisting of KRT5 and KRT14, heterodimers consisting of KRT14 and KRT15, and heterodimers consisting of KRT1 and KRT10 (PubMed:24940650). Interacts with DES and VIM (PubMed:24940650). Widely expressed with highest levels in muscle, heart, placenta and spinal cord. The N-terminus interacts with actin, the C-terminus with vimentin, desmin, GFAP, cytokeratins, lamin B; whereas both the N- and the C-terminus can bind integrin beta-4. Phosphorylated by CDK1; regulates dissociation from intermediate filaments during mitosis. The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. A 9 bp deletion containing the initiation codon in exon 1f of PLEC have been found in limb-girdle muscular dystrophy patients. The mutation results in deficient expression of isoform 9 and disorganization of the myofibers, without any effect on the skin. The disease is caused by variants affecting the gene represented in this entry. Belongs to the plakin or cytolinker family. Plectin entry