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Catalytic domain mutation in CYLD inactivates its enzyme function by structural perturbation and induces cell migration and proliferation General subjects

Author:
Johari, Tanu, Maiti, Tushar Kanti
Source:
Biochimica et biophysica acta 2018 v.1862 no.9 pp. 2081-2089
ISSN:
0304-4165
Subject:
DNA repair, active sites, apoptosis, carcinogenesis, caspases, catalytic activity, cell cycle, cell differentiation, cell movement, cell viability, databases, disease course, gain-of-function mutation, germ cells, lysine, mitogen-activated protein kinase, point mutation, signal transduction, skin neoplasms, somatic mutation, transcription factor NF-kappa B, ubiquitin
Abstract:
Tumor suppressor cylindromatosis protein (CYLD), which specifically cleaves lysine 63-linked ubiquitin chain from its substrate molecules, contributes to myriad of important cellular events including cellular differentiation, oncogenesis, DNA repair and cell cycle control. It is a ubiquitously expressed protein, which negatively regulates NF-kB and JNK signaling pathways and mediates caspase dependent apoptosis through RIP1 deubiqutination. Germline mutations in CYLD are associated with a rare, hypertrophic skin cancer, termed Familial Cylindromatosis. Catalogue of Somatic Mutations in Cancer database ensembles accumulating CYLD point mutations in multiple benign and malignant tumors. However, the functional role of CYLD mutations and their association with cancer progression remains elusive. In the present report, we have shown that cancer associated mutations impose structural alteration in CYLD which impairs its binding to K63 ubiquitin chain. Here, we conclude that loss of CYLD catalytic activity potentiates its oncogenic gain of function through increased cell survival and migration.
Agid:
6107943