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Anvarian, Z.* ; Nojima, H.* ; van Kappel, E.C.* ; Madl, T. ; Spit, M.* ; Viertler, M. ; Jordens, I.* ; Low, T.Y.* ; van Scherpenzeel, R.C.* ; Kuper, I.* ; Richter, K.* ; Heck, A.J.* ; Boelens, R.* ; Vincent, J.P.* ; Rüdiger, S.G.* ; Maurice, M.M.*

Axin cancer mutants form nanoaggregates to rewire the Wnt signaling network.

Nat. Struct. Mol. Biol. 23, 324-332 (2016)
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Signaling cascades depend on scaffold proteins that regulate the assembly of multiprotein complexes. Missense mutations in scaffold proteins are frequent in human cancer, but their relevance and mode of action are poorly understood. Here we show that cancer point mutations in the scaffold protein Axin derail Wnt signaling and promote tumor growth in vivo through a gain-of-function mechanism. The effect is conserved for both the human and Drosophila proteins. Mutated Axin forms nonamyloid nanometer-scale aggregates decorated with disordered tentacles, which 'rewire' the Axin interactome. Importantly, the tumor-suppressor activity of both the human and Drosophila Axin cancer mutants is rescued by preventing aggregation of a single nonconserved segment. Our findings establish a new paradigm for misregulation of signaling in cancer and show that targeting aggregation-prone stretches in mutated scaffolds holds attractive potential for cancer treatment.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Beta-catenin; Tumor-suppressor; Missense Mutations; Colorectal-cancer; Scaffold Proteins; Complex; Brca1; P53; Aggregation; Drosophila
Language
Publication Year 2016
HGF-reported in Year 2016
ISSN (print) / ISBN 1545-9993
e-ISSN 1545-9985
Quellenangaben Volume: 23, Issue: 4, Pages: 324-332 Article Number: , Supplement: ,
Publisher Nature Publishing Group
Publishing Place New York, NY
Reviewing status Peer reviewed
POF-Topic(s) 30505 - New Technologies for Biomedical Discoveries
Research field(s) Enabling and Novel Technologies
PSP Element(s) G-552800-001
PubMed ID 26974125
Erfassungsdatum 2016-03-16