کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5505750 | 1400277 | 2017 | 7 صفحه PDF | دانلود رایگان |
- Two nup98 variants are expressed among various mouse tissues and human cell lines.
- Both variants show similar localization patterns.
- Nup98-TopIIβ and Nup98-SETBP1 change the localization of full-length Nup98.
- Nup98-TopIIβ and Nup98-SETBP1 reduce the nuclear export activity of XPO1.
Nup98 is a component of the nuclear pore complex. The nup98-fusion genes derived by chromosome translocations are involved in hematopoietic malignancies. Here, we investigated the functions of Nup98 isoforms and two unexamined Nup98-fusion proteins, Nup98-TopIIβ and Nup98-SETBP1. We first demonstrated that two Nup98 isoforms are expressed in various mouse tissues and similarly localized in the nucleus and the nuclear envelope. We also showed that Nup98-TopIIβ and Nup98-SETBP1 are localized in the nucleus and partially co-localized with full-length Nup98 and a nuclear export receptor XPO1. We demonstrated that Nup98-TopIIβ and Nup98-SETBP1 negatively regulate the XPO1-mediated protein export. Our results will contribute to the understanding of the molecular mechanism by which the Nup98-fusion proteins induce tumorigenesis.
Journal: Biochemical and Biophysical Research Communications - Volume 487, Issue 1, 20 May 2017, Pages 96-102