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Int. J. Mol. Sci. 2018, 19(6), 1628; https://doi.org/10.3390/ijms19061628

Fascinating Fasciclins: A Surprisingly Widespread Family of Proteins that Mediate Interactions between the Cell Exterior and the Cell Surface

Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Science, Muthgasse 18, 1190 Vienna, Austria
Received: 9 April 2018 / Revised: 16 May 2018 / Accepted: 17 May 2018 / Published: 31 May 2018
(This article belongs to the Special Issue Plant Cell Wall Proteins and Development)
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Abstract

The Fasciclin 1 (FAS1) domain is an ancient structural motif in extracellular proteins present in all kingdoms of life and particularly abundant in plants. The FAS1 domain accommodates multiple interaction surfaces, enabling it to bind different ligands. The frequently observed tandem FAS1 arrangement might both positively and negatively regulate ligand binding. Additional protein domains and post-translational modifications are partially conserved between different evolutionary clades. Human FAS1 family members are associated with multiple aspects of health and disease. At the cellular level, mammalian FAS1 proteins are implicated in extracellular matrix structure, cell to extracellular matrix and cell to cell adhesion, paracrine signaling, intracellular trafficking and endocytosis. Mammalian FAS1 proteins bind to the integrin family of receptors and to protein and carbohydrate components of the extracellular matrix. FAS1 protein encoding plant genes exert effects on cellulosic and non-cellulosic cell wall structure and cellular signaling but to establish the modes of action for any plant FAS1 protein still requires biochemical experimentation. In fungi, eubacteria and archaea, the differential presence of FAS1 proteins in closely related organisms and isolated biochemical data suggest functions in pathogenicity and symbiosis. The inter-kingdom comparison of FAS1 proteins suggests that molecular mechanisms mediating interactions between cells and their environment may have evolved at the earliest known stages of evolution. View Full-Text
Keywords: arabinogalactan proteins; cellulose; pectin; matricellular proteins; SOS5; periostin; Mpb83 arabinogalactan proteins; cellulose; pectin; matricellular proteins; SOS5; periostin; Mpb83
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Seifert, G.J. Fascinating Fasciclins: A Surprisingly Widespread Family of Proteins that Mediate Interactions between the Cell Exterior and the Cell Surface. Int. J. Mol. Sci. 2018, 19, 1628.

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