Network analysis of DUSP12 partners in the nucleus under genotoxic stress

Author(s)

Monteiro, Lucas Falcao ^[1] ; Forti, Fabio Luis ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Chem, Dept Biochem, Sao Paulo - Brazil

• Document type: Journal article
• Source: JOURNAL OF PROTEOMICS; v. 197, p. 42-52, APR 15 2019.
• Web of Science Citations: 0

Abstract

Dual Specificity Phosphatase 12 is a member of the Atypical DUSP Protein Tyrosine Phosphatase family, meaning that it does not contain typical MAP kinase targeting motifs, while being able to dephosphorylate tyrosine and serine/threonine residues. DUSP12 contains, apart from its catalytic domain, a zinc finger domain, making it one of the largest DUSPs, which displays strong nuclear expression in several tissues. In this work we identified nuclear targets of DUSP12 in two different cancer cell lines (A549 and MCF-7), challenging them with genotoxic stimuli to observe the effect on the networks and to link existing information about DUSP12 functions to the data obtained though mass spectrometry. We found network connections to the cytoskeleton (e.g. IQGAP1), to the chromatin (e.g. HP1BP3), to the splicing machinery and to the previously known pathway of ribosome maturation (e.g. TC0F1), which draw insight into many of the functions of this phosphatase, much likely connecting it to distinct, previously unknown genomic stability mechanisms. (AU)

• FAPESP's process: 18/01753-6 - Identification and functional investigation of proteins that interact with Cdc42 and DUSP12 enzymes in human cells under conditions of genomic instability: a proteomic approach
• Grantee: Fábio Luis Forti
• Support Opportunities: Regular Research Grants