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Functional Analysis of Periplakin and Envoplakin, Cytoskeletal Linkers, and Cornified Envelope Precursor Proteins

Lookup NU author(s): Dr Veronika Boczonadi


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© 2016 Elsevier Inc. All rights reserved. Envoplakin and periplakin are the two smallest plakin family cytoskeletal linker proteins that connect intermediate filaments to cellular junctions and other membrane locations. These two plakins have a structural role in the assembly of the cornified envelope (CE), the terminal stage of epidermal differentiation. Analysis of gene-targeted mice lacking both these plakins and the third initial CE scaffold protein, involucrin, demonstrate the importance of the structural integrity of CE for a proper epidermal barrier function. It has emerged that periplakin, which also has a wider tissue distribution than envoplakin, has additional, independent roles. Periplakin participates in the cytoskeletal organization also in other tissues and interacts with a wide range of membrane-associated proteins such as kazrin and butyrophilin BTN3A1. This review covers methods used to understand periplakin and envoplakin functions in cell culture models, including siRNA ablation of periplakin expression and the use of tagged protein domain constructs to study localization and interactions. In addition, assays that can be used to analyze CEs and epidermal barrier function in gene-targeted mice are described and discussed.

Publication metadata

Author(s): Boczonadi V, Maatta A

Publication type: Book Chapter

Publication status: Published

Book Title: Methods in Enzymology

Year: 2016

Volume: 569

Pages: 309-329

Online publication date: 06/07/2015

Acceptance date: 01/01/1900

Publisher: Academic Press Inc.


DOI: 10.1016/bs.mie.2015.06.019