| Full text | |
| Author(s): |
Reina, Jeffrey
[1]
;
Zhou, Lixin
[2]
;
Fontes, Marcos R. M.
[3]
;
Pante, Nelly
[2]
;
Cella, Nathalie
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Sao Paulo, Inst Biomed Sci, Dept Cell & Dev Biol, Sao Paulo, SP - Brazil
[2] Univ British Columbia, Dept Zool, Vancouver, BC - Canada
[3] Sao Paulo State Univ, UNESP, Inst Biosci, Dept Phys & Biophys, Botucatu, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | FEBS OPEN BIO; v. 9, n. 7, p. 1174-1183, JUL 2019. |
| Web of Science Citations: | 1 |
| Abstract | |
The tumor suppressor activity of maspin (mammary serine protease inhibitor) has been associated with its nuclear localization. In this study we explore the regulation of maspin nuclear translocation. An in vitro nuclear import assay suggested that maspin can passively enter the nucleus. However, in silico analysis identified a putative maspin nuclear localization signal (NLS), which was able to mediate the nuclear translocation of a chimeric protein containing this NLS fused to five green fluorescent protein molecules in tandem (5GFP). Dominant-negative Ran-GTPase mutants RanQ69L or RanT24N suppressed this process. Unexpectedly, the full-length maspin fused to 5GFP failed to enter the nucleus. As maspin's putative NLS is partially hidden in its three-dimensional structure, we suggest that maspin nuclear transport could be conformationally regulated. Our results suggest that maspin nuclear translocation involves both passive and active mechanisms. (AU) | |
| FAPESP's process: | 13/24705-3 - The filamentous fungus Neurospora crassa as a model organism for the functional characterization of proteins/transcription factors that regulate the carbohydrate metabolism |
| Grantee: | Maria Celia Bertolini |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 15/09309-0 - Maspin - function and signaling pathways in the mouse mammary epithelium |
| Grantee: | Nathalie Cella |
| Support Opportunities: | Regular Research Grants |