title: Cysteine cathepsin activity regulation by glycosaminoglycans.
abstract: Cysteine cathepsins are a group of enzymes normally found in the endolysosomes where they are primarily involved in intracellular protein turnover but also have a critical role in MHC II-mediated antigen processing and presentation. However, in a number of pathologies cysteine cathepsins were found to be heavily upregulated and secreted into extracellular milieu, where they were found to degrade a number of extracellular proteins. A major role in modulating cathepsin activities play glycosaminoglycans, which were found not only to facilitate their autocatalytic activation including at neutral pH, but also to critically modulate their activities such as in the case of the collagenolytic activity of cathepsin K. The interaction between cathepsins and glycosaminoglycans will be discussed in more detail.
authors.affiliation: Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia.
authors.forename: Marko
authors.identifier: 0000-0003-1824-1649
authors.initials: M
authors.lastname: Novinec
authors.affiliation: Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia ; Department of Biochemistry, Molecular and Structural Biology, Jozef Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia.
authors.forename: Brigita
authors.initials: B
authors.lastname: Lenarčič
authors.affiliation: Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia ; Department of Biochemistry, Molecular and Structural Biology, Jozef Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia ; Centre of Excellence for Integrated Approaches in Chemistry and Biology of Proteins, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia.
authors.forename: Boris
authors.identifier: 0000-0002-9007-5764
authors.initials: B
authors.lastname: Turk
mesh_terms: D017951:Antigen Presentation / Q000276:immunology*; D056657:Cathepsin K / Q000276:immunology / Q000378:metabolism; D003545:Cysteine / Q000276:immunology* / Q000378:metabolism; D005802:Genes, MHC Class II / Q000276:immunology; D006025:Glycosaminoglycans / Q000276:immunology* / Q000378:metabolism; D006801:Humans; D008247:Lysosomes / Q000276:immunology / Q000378:metabolism
chemical_list: D006025:Glycosaminoglycans; C534130:CTSK protein, human; D056657:Cathepsin K; D003545:Cysteine