Search for KPNA7 cargo proteins in human cells reveals MVP and ZNF414 as novel regulators of cancer cell growth
| Autor: | Elisa M. Vuorinen, Anssi Nurminen, Vesa P. Hytönen, Anne Kallioniemi, Nina Rajala, Hanna E. Rauhala |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
alpha Karyopherins
0301 basic medicine Active Transport Cell Nucleus Biology 03 medical and health sciences 0302 clinical medicine Cell Line Tumor Pancreatic cancer medicine Humans Gene silencing Protein Interaction Maps Molecular Biology Cell Proliferation Vault Ribonucleoprotein Particles Karyopherin chemistry.chemical_classification Cell growth medicine.disease Molecular biology Cell biology DNA-Binding Proteins Pancreatic Neoplasms 030104 developmental biology medicine.anatomical_structure chemistry 030220 oncology & carcinogenesis Cancer cell Molecular Medicine Nuclear transport Nucleus Nuclear localization sequence Transcription Factors |
| Zdroj: | Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease. 1863:211-219 |
| ISSN: | 0925-4439 |
| DOI: | 10.1016/j.bbadis.2016.09.015 |
| Popis: | Karyopherin alpha 7 (KPNA7) belongs to a family of nuclear import proteins that recognize and bind nuclear localization signals (NLSs) in proteins to be transported to the nucleus. Previously we found that KPNA7 is overexpressed in a subset of pancreatic cancer cell lines and acts as a critical regulator of growth in these cells. This characteristic of KPNA7 is likely to be mediated by its cargo proteins that are still mainly unknown. Here, we used protein affinity chromatography in Hs700T and MIA PaCa-2 pancreatic cancer cell lines and identified 377 putative KPNA7 cargo proteins, most of which were known or predicted to localize to the nucleus. The interaction was confirmed for two of the candidates, MVP and ZNF414, using co-immunoprecipitation, and their transport to the nucleus was hindered by siRNA based KPNA7 silencing. Most importantly, silencing of MVP and ZNF414 resulted in marked reduction in Hs700T cell growth. In conclusion, these data uncover two previously unknown human KPNA7 cargo proteins with distinct roles as novel regulators of pancreatic cancer cell growth, thus deepening our understanding on the contribution of nuclear transport in cancer pathogenesis. |
| Databáze: | OpenAIRE |
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