| RRC ID |
11032
|
| 著者 |
Kimura T, Hashimoto I, Nishikawa M, Yamada H.
|
| タイトル |
Nucleocytoplasmic transport of luciferase gene mRNA requires CRM1/Exportin1 and RanGTPase.
|
| ジャーナル |
Med Mol Morphol
|
| Abstract |
Human immunodeficiency virus type 1 Rev (regulator of the expression of the virion) protein was shown to reduce the expression level of the co-transfected luciferase reporter gene (luc+) introduced to monitor transfection efficiency. We studied the mechanism of the inhibitory Rev effect. The effect, caused by nuclear retention of luc+ mRNA, was reversed if rev had a point mutation that makes its nuclear export signal (NES) unable to associate with cellular transport factors. The Rev NES receptor CRM1 (chromosome region maintenance 1)-specific inhibitor, leptomycin B, blocked luc+ mRNA export. This finding was also supported by the overexpression of delta CAN, another specific CRM1 inhibitor that caused inhibition of luciferase gene expression. Experiments involving tsBN2 cells, which have a temperature-sensitive RCC1 (regulator of chromosome condensation 1) allele, demonstrated that luc+ expression required generation of the GTP-bound form of RanGTPase (RanGTP) by RCC1. The constitutive transport element (CTE)-mediated nuclear export of luc+ mRNA was found to also depend upon RanGTP. Nuclear export of luc+ mRNA is thus suggested to involve CRM1 and RanGTP, which Rev employs to transport viral mRNA. The Rev effect is therefore considered to involve competition between two molecules for common transport factors.
|
| 巻・号 |
42(2)
|
| ページ |
70-81
|
| 公開日 |
2009-6-1
|
| DOI |
10.1007/s00795-009-0441-3
|
| PMID |
19536614
|
| MeSH |
Active Transport, Cell Nucleus / drug effects
Cell Line, Tumor
Cell Nucleus / metabolism*
Fatty Acids, Unsaturated / pharmacology
Genes, rev
HIV-1 / genetics
HeLa Cells
Humans
Karyopherins / metabolism*
Luciferases, Firefly / genetics*
Luciferases, Firefly / metabolism
Nuclear Export Signals / drug effects
Nuclear Pore Complex Proteins / genetics
Nuclear Pore Complex Proteins / metabolism*
RNA, Messenger / metabolism*
RNA-Binding Proteins / genetics
RNA-Binding Proteins / metabolism*
Receptors, Cytoplasmic and Nuclear / metabolism*
Transfection
ran GTP-Binding Protein / metabolism*
|
| IF |
2.429
|
| 引用数 |
9
|
|
WOS 分野
|
MICROSCOPY
PATHOLOGY
BIOLOGY
|
| リソース情報 |
| ヒト・動物細胞 |
tsBN2(RCB1264)
HeLa(RCB0007) |
