T
Tomoyuki Ohba
Researcher at Kyushu University
Publications - 8
Citations - 1091
Tomoyuki Ohba is an academic researcher from Kyushu University. The author has contributed to research in topics: Ran & Guanine nucleotide exchange factor. The author has an hindex of 7, co-authored 8 publications receiving 1062 citations.
Papers
More filters
Journal ArticleDOI
A giant nucleopore protein that binds Ran/TC4.
Nobuhiko Yokoyama,Naoyuki Hayashi,Tatsuya Seki,Nelly Panté,Tomoyuki Ohba,K. Nishii,Kei-ichi Kuma,Toshiro Hayashida,Takashi Miyata,Ueli Aebi,Ueli Aebi,M. Fukui,Takeharu Nishimoto +12 more
TL;DR: The identification of RanBP2, a novel protein of 3,224 residues, which contains the XFXFG pentapeptide motif characteristic of nuclear pore complex (NPC) proteins, and immunolocalization suggests that Ran BP2 is a constituent of the NPC.
Journal ArticleDOI
Self-Organization of Microtubule Asters Induced in Xenopus Egg Extracts by GTP-Bound Ran
TL;DR: Ran was shown to regulate formation of the microtubule network and induced self-organization of microtubules asters in Xenopus egg extracts arrested in meiosis II.
Journal ArticleDOI
When Overexpressed, a Novel Centrosomal Protein, RanBPM, Causes Ectopic Microtubule Nucleation Similar to γ-Tubulin
Masafumi Nakamura,Hirohisa Masuda,Johji Horii,Kei-ichi Kuma,Nobuhiko Yokoyama,Tomoyuki Ohba,Hideo Nishitani,Takashi Miyata,Masao Tanaka,Takeharu Nishimoto +9 more
TL;DR: Results provide evidence that the Ran-binding protein, RanBPM, is involved in microtubule nucleation, thereby suggesting that Ran regulates the centrosome through RanB PM.
Journal ArticleDOI
The Saccharomyces cerevisiae Small GTPase, Gsp1p/Ran, Is Involved in 3′ Processing of 7S-to-5.8S rRNA and in Degradation of the Excised 5′-A0 Fragment of 35S Pre-rRNA, Both of Which Are Carried Out by the Exosome
Nobuhiro Suzuki,Eishi Noguchi,Nobutaka Nakashima,Masaya Oki,Tomoyuki Ohba,Alan M. Tartakoff,Masamichi Ohishi,Takeharu Nishimoto +7 more
TL;DR: It is found that Gsp1p regulates rRNA processing through Dis3p, independent of nucleocytoplasmic transport, in strains with mutations in a S. cerevisiae Ran homologue, Gsp 1p.
Journal ArticleDOI
Conserved Histidine Residues of RCC1 Are Essential for Nucleotide Exchange on Ran
Yoshiaki Azuma,Hiroaki Seino,Takashi Seki,Satoru Uzawa,Christian Klebe,Tomoyuki Ohba,Alfred Wittinghofer,Naoyuki Hayashi,Takeharu Nishimoto +8 more
TL;DR: The comparison of kcat among the histidine mutants suggests that those histidine residues which are conserved in the RCC1 repeats and also through evolution comprise the catalytic site for the guanine nucleotide exchange reaction.