Journal article
Perinuclear and nuclear envelope localizations of Arabidopsis Ran proteins
Plant cell reports, Vol.26(8), pp.1373-1382
08/2007
Handle:
https://hdl.handle.net/2376/114230
PMID: 17530257
Abstract
Using phragmoplastin-interacting protein 1 (PhrIP1) as bait, we isolated an Arabidopsis cDNA encoding Ran2, a small Ras-like GTP-binding protein. The interaction between PhrIP1 and Ran2 was confirmed by an in vitro protein–protein interaction assay with purified Ran2 and PhrIP1. The plant Ran2 shares high sequence homology, 78 and 86% at the amino acid level, with human Ran/TC4 and C.
elegans Ran, respectively. Our results obtained from enzyme assays and Western blot analysis show that Ran2 has intrinsic GTPase activity and is present in the soluble fraction of Arabidopsis seedling extract. Fluorescent microscopy using anti-Ran2 antibody revealed that the Ran protein is localized in the perinuclear region with the highest concentration at the nuclear envelope. In contrast to its animal counterparts that are present in the nucleoplasm, the Ran protein is absent inside the nucleus. These results suggest that plant Ran proteins may be involved in mediation of nucleocytoplasmic transport and assembly of the nuclear envelope after karyokinesis in plant cells.
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Details
- Title
- Perinuclear and nuclear envelope localizations of Arabidopsis Ran proteins
- Creators
- Lian Ma - College of Life Science Yangtze University Jingzhou 434025 ChinaZonglie Hong - Department of Microbiology, Molecular Biology and Biochemistry University of Idaho Moscow ID 83844 USAZhongming Zhang - State Key Laboratory of Agricultural Microbiology Huazhong Agricultural University Wuhan 430070 China
- Publication Details
- Plant cell reports, Vol.26(8), pp.1373-1382
- Academic Unit
- Center for Reproductive Biology
- Publisher
- Springer-Verlag; Berlin/Heidelberg
- Identifiers
- 99900547763601842
- Language
- English
- Resource Type
- Journal article