RRC ID 47479
著者 Satoh R, Matsumura Y, Tanaka A, Takada M, Ito Y, Hagihara K, Inari M, Kita A, Fukao A, Fujiwara T, Hirai S, Tani T, Sugiura R.
タイトル Spatial regulation of the KH domain RNA-binding protein Rnc1 mediated by a Crm1-independent nuclear export system in Schizosaccharomyces pombe.
ジャーナル Mol Microbiol
Abstract RNA-binding proteins (RBPs) play important roles in the posttranscriptional regulation of gene expression, including mRNA stability, transport and translation. Fission yeast rnc1+ encodes a K Homology (KH)-type RBP, which binds and stabilizes the Pmp1 MAPK phosphatase mRNA thereby suppressing the Cl- hypersensitivity of calcineurin deletion and MAPK signaling mutants. Here, we analyzed the spatial regulation of Rnc1 and discovered a putative nuclear export signal (NES)Rnc1 , which dictates the cytoplasmic localization of Rnc1 in a Crm1-independent manner. Notably, mutations in the NESRnc1 altered nucleocytoplasmic distribution of Rnc1 and abolished its function to suppress calcineurin deletion, although the Rnc1 NES mutant maintains the ability to bind Pmp1 mRNA. Intriguingly, the Rnc1 NES mutant destabilized Pmp1 mRNA, suggesting the functional importance of the Rnc1 cytoplasmic localization. Mutation in Rae1, but not Mex67 deletion or overproduction, induced Rnc1 accumulation in the nucleus, suggesting that Rnc1 is exported from the nucleus to the cytoplasm via the mRNA export pathway involving Rae1. Importantly, mutations in the Rnc1 KH-domains abolished the mRNA-binding ability and induced nuclear localization, suggesting that Rnc1 may be exported from the nucleus together with its target mRNAs. Collectively, the functional Rae1-dependent mRNA export system may influence the cytoplasmic localization and function of Rnc1.
巻・号 104(3)
ページ 428-448
公開日 2017-5-1
DOI 10.1111/mmi.13636
PMID 28142187
MeSH Active Transport, Cell Nucleus / physiology* Cell Nucleus / metabolism* Cytoplasm / metabolism Deoxyribonucleases / genetics Deoxyribonucleases / metabolism* Karyopherins / metabolism* Nucleocytoplasmic Transport Proteins / metabolism Protein Domains RNA Stability RNA, Messenger / metabolism Receptors, Cytoplasmic and Nuclear / metabolism* Saccharomyces cerevisiae Proteins / genetics Saccharomyces cerevisiae Proteins / metabolism* Schizosaccharomyces / genetics Schizosaccharomyces / metabolism* Spatial Analysis tRNA Methyltransferases / genetics tRNA Methyltransferases / metabolism*
IF 3.418
引用数 6
WOS 分野 BIOCHEMISTRY & MOLECULAR BIOLOGY MICROBIOLOGY
リソース情報
酵母 FY10179