Plectin

Plectin
PDB rendering based on 1mb8.
Available structures PDB Ortholog search: PDBe, RCSB List of PDB id codes 1MB8​, 2ODU​, 2ODV​, 3F7P​, 3PDY​, 3PE0​, 4GDO​, 4Q58​, 4Q59​
Identifiers
Symbols	PLEC ; EBS1; EBSO; HD1; LGMD2Q; PCN; PLEC1; PLEC1b; PLTN
External IDs	OMIM: 601282 MGI: 1277961 HomoloGene: 384 ChEMBL: 1293240 GeneCards: PLEC Gene
Gene ontology Molecular function • actin binding • protein binding • structural constituent of muscle • ankyrin binding • poly(A) RNA binding Cellular component • cytoplasm • cytosol • plasma membrane • brush border • focal adhesion • sarcoplasm • hemidesmosome • sarcolemma • costamere • intermediate filament cytoskeleton • extracellular exosome Biological process • apoptotic process • cellular component disassembly involved in execution phase of apoptosis • programmed cell death • extracellular matrix organization • hemidesmosome assembly • cell junction assembly Sources: Amigo / QuickGO
Orthologs
Species	Human	Mouse
Entrez	5339	18810
Ensembl	ENSG00000178209	ENSMUSG00000022565
UniProt	Q15149	Q9QXS1
RefSeq (mRNA)	NM_000445	NM_001163540
RefSeq (protein)	NP_000436	NP_001157012
Location (UCSC)	Chr 8: 143.92 – 143.98 Mb	Chr 15: 76.17 – 76.23 Mb
PubMed search

Plectin is a giant protein found in nearly all mammalian cells which acts as a link between the three main components of the cytoskeleton: actin microfilaments, microtubules and intermediate filaments.^[1] In addition plectin links the cytoskeleton to junctions found in the plasma membrane that structurally connect different cells. By holding these different networks together plectin plays an important role in maintaining the mechanical integrity and viscoelastic properties of tissues.^[2]

Structure

Plectin can exist in cells as several alternatively-spliced isoforms, all around 500 kDa and >4000 amino acids.^[3][4] The structure of plectin is thought to be a dimer consisting of a central coiled coil of alpha helices connecting two large globular domains (one at each terminus). These globular domains are responsible for connecting plectin to its various cytoskeletal targets. The carboxy-terminal domain is made of 6 highly homologous repeating regions. The subdomain between regions five and six of this domain is known to connect to the intermediate filaments cytokeratin and vimentin. At the opposite end of the protein, in the N-terminal domain, a region has been defined as responsible for binding to actin.^[5] In 2004, the exact crystal structure of this actin-binding domain (ABD) was determined in mice and shown to be composed of two calponin homology (CH) domains.^[6] Plectin is expressed in nearly all mammalian tissues. In cardiac muscle and skeletal muscle, plectin is localized to specialized entities known as Z-discs.^[7] Plectin binds several proteins, including vinculin, DES,^[8] actin.,^[2][9] fodrin,^[2][9] microtubule-associating proteins,^[2][9] nuclear laminin B.,^[2][9] SPTAN1,^[10][11] vimentin^[10][11][12] and ITGB4.^[2][9]

Function

Studies employing a plectin knockout mouse have shed light on the functions of plectin. Pups died 2–3 days after birth, and these mice exhibited marked skin abnormalities, including degeneration of keratinocytes. Skeletal and cardiac muscle tissues were also significantly affected. Cardiac intercalated discs were disintegrated and sarcomeres were irregularly shapen, and intracellular accumulation of aberrant isolated myofibrillar bundles and Z-disc components was also observed. Expression of vinculin in muscle cells was strikingly down-regulated.^[13] Through the use of gold-immunoelectron microscopy, immunoblotting and immunofluorescence experiments plectin has been found to associate with all three major components of the cytoskeleton. In muscle, plectin binds to the periphery of Z-discs,^[8] and along with the intermediate filament protein desmin, may form lateral linkages among neighboring Z-discs. This interaction between plectin and desmin intermediate filaments also appears to faclitate the close association of myofibrils and mitochondria, both at Z-discs and along the remainder the sarcomere.^[14] Plectin also functions to link cytoskeleton to intercellular junctions, such as desmosomes and hemidesmosomes, which link intermediate filament networks between cells. Plectin has been revealed to localize to the desmosomes and in vitro studies have shown that it can form bridges between the desmosome protein, desmoplakin and intermediate filaments.^[15] In hemidesmosomes plectin has been shown to interact with the integrin β4 subunits of the hemidesmosome plaque and function in a clamp like manner to crosslink the intermediate filament, cytokeratin to the junction.^[16]

Clinical Significance

Mutations in PLEC have been associated with epidermolysis bullosa simplex with muscular dystrophy. Isolated left ventricular non-compaction accompanying epidermolysis bullosa simplex with muscular dystrophy was also noted.^[17] Plectin has been proposed as a biomarker for pancreatic cancer.^[18][19] Although normally a cytoplasmic protein, plectin is expressed on the cell membrane in pancreatic ductal adenocarcinoma (PDAC) and can therefore be used to target PDAC cells.^[18]

See also

• List of target antigens in pemphigus

References

1. Svitkina TM, Verkhovsky AB, Borisy GG (Nov 1996). "Plectin sidearms mediate interaction of intermediate filaments with microtubules and other components of the cytoskeleton". The Journal of Cell Biology 135 (4): 991–1007. doi:10.1083/jcb.135.4.991. PMC 2133373. PMID 8922382.
2. Wiche G (Sep 1998). "Role of plectin in cytoskeleton organization and dynamics" (abstract). Journal of Cell Science 111 (17): 2477–86. PMID 9701547.
3. http://www.heartproteome.org/copa/ProteinInfo.aspx?QType=Protein%20ID&QValue=Q15149-2. Missing or empty |title= (help)
4. Zong, N. C.; Li, H; Li, H; Lam, M. P.; Jimenez, R. C.; Kim, C. S.; Deng, N; Kim, A. K.; Choi, J. H.; Zelaya, I; Liem, D; Meyer, D; Odeberg, J; Fang, C; Lu, H. J.; Xu, T; Weiss, J; Duan, H; Uhlen, M; Yates Jr, 3rd; Apweiler, R; Ge, J; Hermjakob, H; Ping, P (2013). "Integration of cardiac proteome biology and medicine by a specialized knowledgebase". Circulation Research 113 (9): 1043–53. doi:10.1161/CIRCRESAHA.113.301151. PMC 4076475. PMID 23965338.
5. Winter L, Wiche G (Jan 2013). "The many faces of plectin and plectinopathies: pathology and mechanisms". Acta Neuropathologica 125 (1): 77–93. doi:10.1007/s00401-012-1026-0. PMID 22864774.
6. Sevcík J, Urbániková L, Kost'an J, Janda L, Wiche G (May 2004). "Actin-binding domain of mouse plectin. Crystal structure and binding to vimentin". European Journal of Biochemistry / FEBS 271 (10): 1873–84. doi:10.1111/j.1432-1033.2004.04095.x. PMID 15128297.
7. Zernig G, Wiche G (Jul 1985). "Morphological integrity of single adult cardiac myocytes isolated by collagenase treatment: immunolocalization of tubulin, microtubule-associated proteins 1 and 2, plectin, vimentin, and vinculin". European Journal of Cell Biology 38 (1): 113–22. PMID 2992982.
8. Hijikata T, Murakami T, Imamura M, Fujimaki N, Ishikawa H (Mar 1999). "Plectin is a linker of intermediate filaments to Z-discs in skeletal muscle fibers". Journal of Cell Science 112 (6): 867–76. PMID 10036236.
9. Steinböck FA, Wiche G (Feb 1999). "Plectin: a cytolinker by design". Biological Chemistry 380 (2): 151–8. doi:10.1515/BC.1999.023. PMID 10195422.
10. Herrmann H, Wiche G (Jan 1987). "Plectin and IFAP-300K are homologous proteins binding to microtubule-associated proteins 1 and 2 and to the 240-kilodalton subunit of spectrin". The Journal of Biological Chemistry 262 (3): 1320–5. PMID 3027087.
11. Brown MJ, Hallam JA, Liu Y, Yamada KM, Shaw S (Jul 2001). "Cutting edge: integration of human T lymphocyte cytoskeleton by the cytolinker plectin". Journal of Immunology 167 (2): 641–5. doi:10.4049/jimmunol.167.2.641. PMID 11441066.
12. Favre B, Schneider Y, Lingasamy P, Bouameur JE, Begré N, Gontier Y, Steiner-Champliaud MF, Frias MA, Borradori L, Fontao L (May 2011). "Plectin interacts with the rod domain of type III intermediate filament proteins desmin and vimentin". European Journal of Cell Biology 90 (5): 390–400. doi:10.1016/j.ejcb.2010.11.013. PMID 21296452.
13. Andrä K, Lassmann H, Bittner R, Shorny S, Fässler R, Propst F, Wiche G (Dec 1997). "Targeted inactivation of plectin reveals essential function in maintaining the integrity of skin, muscle, and heart cytoarchitecture". Genes & Development 11 (23): 3143–56. doi:10.1101/gad.11.23.3143. PMID 9389647.
14. Reipert S, Steinböck F, Fischer I, Bittner RE, Zeöld A, Wiche G (Nov 1999). "Association of mitochondria with plectin and desmin intermediate filaments in striated muscle". Experimental Cell Research 252 (2): 479–91. doi:10.1006/excr.1999.4626. PMID 10527638.
15. Huber O (Sep 2003). "Structure and function of desmosomal proteins and their role in development and disease". Cellular and Molecular Life Sciences 60 (9): 1872–90. doi:10.1007/s00018-003-3050-7. PMID 14523549.
16. Sonnenberg A, Liem RK (Jun 2007). "Plakins in development and disease". Experimental Cell Research 313 (10): 2189–203. doi:10.1016/j.yexcr.2007.03.039. PMID 17499243.
17. Villa CR, Ryan TD, Collins JJ, Taylor MD, Lucky AW, Jefferies JL (Feb 2015). "Left ventricular non-compaction cardiomyopathy associated with epidermolysis bullosa simplex with muscular dystrophy and PLEC1 mutation". Neuromuscular Disorders 25 (2): 165–8. doi:10.1016/j.nmd.2014.09.011. PMID 25454730.
18. Kelly KA, Bardeesy N, Anbazhagan R, Gurumurthy S, Berger J, Alencar H, Depinho RA, Mahmood U, Weissleder R (Apr 2008). "Targeted nanoparticles for imaging incipient pancreatic ductal adenocarcinoma". PLoS Medicine 5 (4): e85. doi:10.1371/journal.pmed.0050085. PMC 2292750. PMID 18416599.
19. Bausch D, Thomas S, Mino-Kenudson M, Fernández-del CC, Bauer TW, Williams M, Warshaw AL, Thayer SP, Kelly KA (Jan 2011). "Plectin-1 as a novel biomarker for pancreatic cancer". Clinical Cancer Research 17 (2): 302–9. doi:10.1158/1078-0432.CCR-10-0999. PMC 3044444. PMID 21098698.

Further reading

• Pfendner E, Rouan F, Uitto J (Apr 2005). "Progress in epidermolysis bullosa: the phenotypic spectrum of plectin mutations". Experimental Dermatology 14 (4): 241–9. doi:10.1111/j.0906-6705.2005.00324.x. PMID 15810881.
• Foisner R, Traub P, Wiche G (May 1991). "Protein kinase A- and protein kinase C-regulated interaction of plectin with lamin B and vimentin". Proceedings of the National Academy of Sciences of the United States of America 88 (9): 3812–6. doi:10.1073/pnas.88.9.3812. PMC 51543. PMID 2023931.
• Herrmann H, Wiche G (Jan 1987). "Plectin and IFAP-300K are homologous proteins binding to microtubule-associated proteins 1 and 2 and to the 240-kilodalton subunit of spectrin". The Journal of Biological Chemistry 262 (3): 1320–5. PMID 3027087.
• Malecz N, Foisner R, Stadler C, Wiche G (Apr 1996). "Identification of plectin as a substrate of p34cdc2 kinase and mapping of a single phosphorylation site". The Journal of Biological Chemistry 271 (14): 8203–8. doi:10.1074/jbc.271.14.8203. PMID 8626512.
• Liu CG, Maercker C, Castañon MJ, Hauptmann R, Wiche G (Apr 1996). "Human plectin: organization of the gene, sequence analysis, and chromosome localization (8q24)". Proceedings of the National Academy of Sciences of the United States of America 93 (9): 4278–83. doi:10.1073/pnas.93.9.4278. PMC 39526. PMID 8633055.
• Gache Y, Chavanas S, Lacour JP, Wiche G, Owaribe K, Meneguzzi G, Ortonne JP (May 1996). "Defective expression of plectin/HD1 in epidermolysis bullosa simplex with muscular dystrophy". The Journal of Clinical Investigation 97 (10): 2289–98. doi:10.1172/JCI118671. PMC 507309. PMID 8636409.
• Smith FJ, Eady RA, Leigh IM, McMillan JR, Rugg EL, Kelsell DP, Bryant SP, Spurr NK, Geddes JF, Kirtschig G, Milana G, de Bono AG, Owaribe K, Wiche G, Pulkkinen L, Uitto J, McLean WH, Lane EB (Aug 1996). "Plectin deficiency results in muscular dystrophy with epidermolysis bullosa". Nature Genetics 13 (4): 450–7. doi:10.1038/ng0896-450. PMID 8696340.
• McLean WH, Pulkkinen L, Smith FJ, Rugg EL, Lane EB, Bullrich F, Burgeson RE, Amano S, Hudson DL, Owaribe K, McGrath JA, McMillan JR, Eady RA, Leigh IM, Christiano AM, Uitto J (Jul 1996). "Loss of plectin causes epidermolysis bullosa with muscular dystrophy: cDNA cloning and genomic organization". Genes & Development 10 (14): 1724–35. doi:10.1101/gad.10.14.1724. PMID 8698233.
• Nikolic B, Mac Nulty E, Mir B, Wiche G (Sep 1996). "Basic amino acid residue cluster within nuclear targeting sequence motif is essential for cytoplasmic plectin-vimentin network junctions". The Journal of Cell Biology 134 (6): 1455–67. doi:10.1083/jcb.134.6.1455. PMC 2121005. PMID 8830774.
• Pulkkinen L, Smith FJ, Shimizu H, Murata S, Yaoita H, Hachisuka H, Nishikawa T, McLean WH, Uitto J (Oct 1996). "Homozygous deletion mutations in the plectin gene (PLEC1) in patients with epidermolysis bullosa simplex associated with late-onset muscular dystrophy". Human Molecular Genetics 5 (10): 1539–46. doi:10.1093/hmg/5.10.1539. PMID 8894687.
• Gress TM, Müller-Pillasch F, Geng M, Zimmerhackl F, Zehetner G, Friess H, Büchler M, Adler G, Lehrach H (Oct 1996). "A pancreatic cancer-specific expression profile". Oncogene 13 (8): 1819–30. PMID 8895530.
• Andrä K, Nikolic B, Stöcher M, Drenckhahn D, Wiche G (Nov 1998). "Not just scaffolding: plectin regulates actin dynamics in cultured cells". Genes & Development 12 (21): 3442–51. doi:10.1101/gad.12.21.3442. PMC 317224. PMID 9808630.
• Banwell BL, Russel J, Fukudome T, Shen XM, Stilling G, Engel AG (Aug 1999). "Myopathy, myasthenic syndrome, and epidermolysis bullosa simplex due to plectin deficiency". Journal of Neuropathology and Experimental Neurology 58 (8): 832–46. doi:10.1097/00005072-199908000-00006. PMID 10446808.
• Geerts D, Fontao L, Nievers MG, Schaapveld RQ, Purkis PE, Wheeler GN, Lane EB, Leigh IM, Sonnenberg A (Oct 1999). "Binding of integrin alpha6beta4 to plectin prevents plectin association with F-actin but does not interfere with intermediate filament binding". The Journal of Cell Biology 147 (2): 417–34. doi:10.1083/jcb.147.2.417. PMC 2174221. PMID 10525545.
• Stegh AH, Herrmann H, Lampel S, Weisenberger D, Andrä K, Seper M, Wiche G, Krammer PH, Peter ME (Aug 2000). "Identification of the cytolinker plectin as a major early in vivo substrate for caspase 8 during CD95- and tumor necrosis factor receptor-mediated apoptosis". Molecular and Cellular Biology 20 (15): 5665–79. doi:10.1128/MCB.20.15.5665-5679.2000. PMC 86037. PMID 10891503.
• Bauer JW, Rouan F, Kofler B, Rezniczek GA, Kornacker I, Muss W, Hametner R, Klausegger A, Huber A, Pohla-Gubo G, Wiche G, Uitto J, Hintner H (Feb 2001). "A compound heterozygous one amino-acid insertion/nonsense mutation in the plectin gene causes epidermolysis bullosa simplex with plectin deficiency". The American Journal of Pathology 158 (2): 617–25. doi:10.1016/S0002-9440(10)64003-5. PMC 1850321. PMID 11159198.
• Henzler T, Harmache A, Herrmann H, Spring H, Suzan M, Audoly G, Panek T, Bosch V (Mar 2001). "Fully functional, naturally occurring and C-terminally truncated variant human immunodeficiency virus (HIV) Vif does not bind to HIV Gag but influences intermediate filament structure". The Journal of General Virology 82 (Pt 3): 561–73. doi:10.1099/0022-1317-82-3-561. PMID 11172097.
• Nakano A, Pulkkinen L, Murrell D, Rico J, Lucky AW, Garzon M, Stevens CA, Robertson S, Pfendner E, Uitto J (May 2001). "Epidermolysis bullosa with congenital pyloric atresia: novel mutations in the beta 4 integrin gene (ITGB4) and genotype/phenotype correlations". Pediatric Research 49 (5): 618–26. doi:10.1203/00006450-200105000-00003. PMID 11328943.
• Brown MJ, Hallam JA, Liu Y, Yamada KM, Shaw S (Jul 2001). "Cutting edge: integration of human T lymphocyte cytoskeleton by the cytolinker plectin". Journal of Immunology 167 (2): 641–5. doi:10.4049/jimmunol.167.2.641. PMID 11441066.
• Koss-Harnes D, Høyheim B, Anton-Lamprecht I, Gjesti A, Jørgensen RS, Jahnsen FL, Olaisen B, Wiche G, Gedde-Dahl T (Jan 2002). "A site-specific plectin mutation causes dominant epidermolysis bullosa simplex Ogna: two identical de novo mutations". The Journal of Investigative Dermatology 118 (1): 87–93. doi:10.1046/j.0022-202x.2001.01591.x. PMID 11851880.

External links

• Mass spectrometry characterization of one isoform of PLEC at COPaKB.^[1]
• GeneReviews/NCBI/NIH/UW entry on Epidermolysis Bullosa with Pyloric Atresia
• plectin at the US National Library of Medicine Medical Subject Headings (MeSH)
• "Plectin". The University of Edinburgh. 2003-11-13. Retrieved 2008-02-17.

1. Zong NC, Li H, Li H, Lam MP, Jimenez RC, Kim CS, Deng N, Kim AK, Choi JH, Zelaya I, Liem D, Meyer D, Odeberg J, Fang C, Lu HJ, Xu T, Weiss J, Duan H, Uhlen M, Yates JR, Apweiler R, Ge J, Hermjakob H, Ping P (Oct 2013). "Integration of cardiac proteome biology and medicine by a specialized knowledgebase". Circulation Research 113 (9): 1043–1053. doi:10.1161/CIRCRESAHA.113.301151. PMC 4076475. PMID 23965338.