{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T13:58:27Z","timestamp":1791899907682,"version":"4.3.4"},"reference-count":45,"publisher":"The Company of Biologists","issue":"10","license":[{"start":{"date-parts":[[1996,10,1]],"date-time":"1996-10-01T00:00:00Z","timestamp":844128000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/www.biologists.com\/user-licence-1-1\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[1996,10,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n               <jats:p>Hemidesmosomes are complex macromolecular structures which integrate elements of the extracellular matrix and the cytoskeleton of epithelial cells. To characterize cell-matrix interactions in the hemidesmosome, we have made use of 804G cells which possess the unusual ability to assemble hemidesmosomes in vitro. During the course of our studies, we have raised a set of monoclonal antibodies against rat laminin-5, the major structural element comprising 804G matrix. One of these, termed CM6, recognizes the 150 kDa \u03b1 chain of rat laminin-5 and binds the globular (G) domain of intact laminin-5 molecules as determined by rotary shadowing. CM6 antibodies perturb formed hemidesmosomes in 804G cells. In particular, within 1 hour of incubation of 804G cells with CM6 antibodies, colocalization of laminin-5 and \u03b16\u03b24 integrin is lost and by 2 hours, staining generated by hemidesmosomal antibodies appears primarily cytoplasmic in the perinuclear zone. Ultrastructurally, CM6 antibodies first appear to induce detachment of hemidesmosomes from the underlying matrix. Next, portions of the basal cell surface invaginate to form vesicles whose cytoplasmic-facing surface is coated with hemidesmosomes still associated with keratin intermediate filaments. Anchoring filaments extend into the inside compartment of the vesicles. We have also studied the impact of CM6 antibodies on a model system in which the matrix of 804G cells induces de novo assembly of hemidesmosomes in human keratinocytes. This process involves the plasma membrane reorganization of the hemidesmosome associated integrin \u03b16\u03b24 as well as a redistribution of other hemidesmosome components such as the 230 kDa bullous pemphigoid antigen. Pretreatment of 804G matrix with CM6 antibodies blocks such plasma membrane reorganization of hemidesmosome components and inhibits hemidesmosome formation. Our studies indicate a crucial role for the G domain of the \u03b1 chain of laminin-5 in both nucleation of hemidesmosome assembly as well as maintenance of hemidesmosome structural integrity.<\/jats:p>","DOI":"10.1242\/jcs.109.10.2509","type":"journal-article","created":{"date-parts":[[2021,4,25]],"date-time":"2021-04-25T16:29:42Z","timestamp":1619368182000},"page":"2509-2520","source":"Crossref","is-referenced-by-count":171,"title":["Laminin-5 and hemidesmosomes: role of the \u03b13 chain subunit in hemidesmosome stability and assembly"],"prefix":"10.1242","volume":"109","author":[{"given":"Scott E.","family":"Baker","sequence":"first","affiliation":[{"name":"1 Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, IL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Susan B.","family":"Hopkinson","sequence":"additional","affiliation":[{"name":"1 Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, IL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mark","family":"Fitchmun","sequence":"additional","affiliation":[{"name":"2 Desmos Inc., San Diego, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Grai L.","family":"Andreason","sequence":"additional","affiliation":[{"name":"3 Department of Cell Biology, The Scripps Research Institute, La Jolla, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francine","family":"Frasier","sequence":"additional","affiliation":[{"name":"3 Department of Cell Biology, The Scripps Research Institute, La Jolla, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"George","family":"Plopper","sequence":"additional","affiliation":[{"name":"3 Department of Cell Biology, The Scripps Research Institute, La Jolla, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vito","family":"Quaranta","sequence":"additional","affiliation":[{"name":"3 Department of Cell Biology, The Scripps Research Institute, La Jolla, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonathan C. 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