Abstract
Ubiquitination pathway regulates many cellular events that underlie the development of various cancer types. This led to tremendous interest in exploration of cancer therapeutics potential among the ubiquitination components, the E1, E2, E3 and deubiquitinase (DUB). Approximately 101 DUBs are encoded in human cell and often, studies on the DUBs were performed individually. Therefore, this study is conducted to observe the peculiarities of cancer protein subnetwork within DUB interactome, aiming to increase understanding on the relationship between DUBs and cancer from system biology point of view. To construct the DUB interactome, proteins associated with DUBs were extracted from IMEx consortium database and the interaction network were visualized in Cytoscape. Cancer protein nodes were identified according to the list from COSMIC Cancer Gene Census database and were extracted to form a subnetwork of 247 nodes and 326 edges. Some DUBs such as BAP1, TNFAIP3, USP6, CYLD and USP44 are observed to be the cancer proteins themselves and 78 DUBs have direct association with cancer related proteins. Topological analysis by NetworkAnalyzer and CentiScaPe suggested that OTUB1, COPS5 and USP7 have the strongest characteristics, indicating that these DUBs must have important roles in cancer-related pathways. Comparison with essential protein subnetwork suggested that the cancer protein subnetwork tends to have weaker clustering coefficient, lower betweenness centrality and higher closeness centrality. Overall, it could be said that the topological analysis of cancer protein subnetwork in DUB interactome interpreted from this study helps to provide a deeper understanding on the biological significance of DUBs in cancer.
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Notes
- 1.
Ubiquitin specific protease.
- 2.
Ovarian tumour protease.
- 3.
Machado-Josephin domain.
- 4.
Ubiquitin C-terminal hydrolase.
- 5.
Jab1/MPN/MOV34 metalloenzyme.
- 6.
Zinc finger with UFM1 specific peptidase domain.
- 7.
Motifs interacting with Ub-containing novel DUB family.
- 8.
UniProt: UNIversal PROTein (https://www.uniprot.org/uniprot/).
- 9.
PSICQUIC: Proteomics Standard Initiative Common QUery InterfaCe.
- 10.
MINT: Molecular INTeraction.
- 11.
IMEx: International Molecular EXchange.
- 12.
COSMIC: Catalogue of Somatic Mutations in Cancer (https://cancer.sanger.ac.uk/census).
- 13.
OGEE: Online GEne Essentiality database (http://ogee.medgenius.info/browse/).
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Acknowledgement
This work was supported by Universiti Sains Malaysia under Bridging Grant (304/CIPPT/6316203).
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Zulkifle, N. (2020). Topological Analysis of Cancer Protein Subnetwork in Deubiquitinase (DUB) Interactome. In: Rojas, I., Valenzuela, O., Rojas, F., Herrera, L., Ortuño, F. (eds) Bioinformatics and Biomedical Engineering. IWBBIO 2020. Lecture Notes in Computer Science(), vol 12108. Springer, Cham. https://doi.org/10.1007/978-3-030-45385-5_23
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