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Journal Articles

Development of ${it Deinococcus grandis/Escherichia coli}$ shuttle vector

Sato, Katsuya; Tu, Z.*; Oba, Hirofumi*; Narumi, Issei

JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 81, 2009/12

no abstracts in English

Journal Articles

Development of versatile shuttle vectors for ${it Deinococcus grandis}$

Sato, Katsuya; Tu, Z.*; Oba, Hirofumi; Narumi, Issei

Plasmid, 62(1), p.1 - 9, 2009/07

 Times Cited Count:10 Percentile:26.36(Genetics & Heredity)

To develop new shuttle vectors for ${it Deinococcus}$ species, the nucleotide sequence of the small cryptic plasmid pUE30 from Deinococcus radiopugnans ATCC19172 was determined. The 2,467-bp plasmid possesses two open reading frames, one encoding 88 amino acid residues (Orf1) and the other encoding 501 amino acid residues (Orf2). The predicted amino acid sequence encoded by Orf1 exhibits similarity to the N-terminal regions of replication proteins encoded by ${it repABC}$-type plasmids of $$alpha$$-proteobacteria. On the other hand, the predicted amino acid sequence encoded by Orf2 exhibits similarity to replication proteins encoded by plasmids of ${it D. radiodurans}$ SARK and ${it Thermus}$ species. Hybrid plasmids consisting of pUE30 and pKatCAT5, which replicates in ${it E. coli}$ with a chloramphenicol resistance determinant, were shown to autonomously replicate in ${it D. grandis}$ ATCC43672. Deletion analysis revealed that Orf2 was necessary for replication of the plasmids in ${it D. grandis}$. On the other hand, a DNA fragment encompassing the Orf1-coding region was involved in the instability of the plasmid in ${it D. grandis}$. An expression plasmid that possesses the ${it D. radiodurans}$ minimal ${it groE}$ promoter was constructed, and a firefly luciferase gene was successfully expressed in ${it D. grandis}$. The ${it D. grandis}$ host-vector system developed in this study should prove useful in the bioremediation of radioactive waste and for the investigation of DNA repair mechanisms.

Journal Articles

Application of real time PCR for the quantitative detection of radiation-induced genomic DNA strand breaks

Yamauchi, Emiko*; Watanabe, Ritsuko; Oikawa, Miyoko*; Fujimoto, Hirofumi*; Yamada, Akinori*; Saito, Kimiaki; Murakami, Masahiro*; Hashido, Kazuo*; Tsuchida, Kozo*; Takada, Naoko*; et al.

Journal of Insect Biotechnology and Sericology, 77(1), p.17 - 24, 2008/02

The frequency of single strand breaks (SSBs) occurring on both strands of the pBR322 plasmid DNA region flanked by a pair of primers used for polymerase chain reaction (PCR) amplifications was determined after irradiation with $$^{137}$$Cs $$gamma$$-rays. We refined that real time PCR is suitable for the detection and quantitative analysis of SSBs caused by $$gamma$$-ray irradiation. The utility of this approach was also supported by the comparison of the practical experimental data with the Monte Carlo simulation. The potential application of this PCR method for the detection of genomic DNA damage was also confirmed.

Journal Articles

Regeneration of hemopoietic organs in the silkworm, ${it bombyx mori}$, after locally targeted irradiation with heavy ion beams

Ling, E.*; Fukamoto, Kana*; Xu, S.*; Shirai, Koji*; Kanekatsu, Rensuke*; Kobayashi, Yasuhiko; Tu, Z.; Funayama, Tomoo; Watanabe, Hiroshi; Kiguchi, Kenji*

Journal of Insect Biotechnology and Sericology, 72(2), p.95 - 100, 2003/09

no abstracts in English

Journal Articles

Why does hemocyte density rise during the wandering stage of the silkworm, ${it bombyx mori}$?

Ling, E.*; Shirai, Koji*; Kanekatsu, Rensuke*; Kobayashi, Yasuhiko; Tu, Z.; Funayama, Tomoo; Watanabe, Hiroshi; Kiguchi, Kenji*

Journal of Insect Biotechnology and Sericology, 72(2), p.101 - 109, 2003/09

no abstracts in English

Journal Articles

Irradiation effect of different heavy ions and track section on the silkworm ${it bombyx mori}$

Tu, Z.; Kobayashi, Yasuhiko; Kiguchi, Kenji*; Watanabe, Hiroshi

Nuclear Instruments and Methods in Physics Research B, 206, p.591 - 595, 2003/05

no abstracts in English

Journal Articles

Irradiation effect of different heavy ions and track section on the silkworm ${it bombyx mori}$

Tu, Z.; Kobayashi, Yasuhiko; Kiguchi, Kenji*; Watanabe, Hiroshi

Nuclear Instruments and Methods in Physics Research B, 206(1-4), p.591 - 595, 2003/05

 Times Cited Count:0 Percentile:0.01(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Effects of heavy-ion radiosurgery on the hemopoietic function of the silkworm ${it bombyx mori}$

Tu, Z.; Kobayashi, Yasuhiko; Kiguchi, Kenji*; Watanabe, Hiroshi; Yamamoto, Kazuo*

Journal of Radiation Research, 43(3), p.269 - 275, 2002/11

 Times Cited Count:11 Percentile:32.16(Biology)

no abstracts in English

Journal Articles

Applicability of radiosurgery with heavy ion beams to inactivate specific organs in living organisms

Tu, Z.; Kobayashi, Yasuhiko; Kiguchi, Kenji*; Watanabe, Hiroshi

Radiation and Environmental Biophysics, 41(3), p.231 - 234, 2002/08

 Times Cited Count:5 Percentile:16.74(Biology)

no abstracts in English

Journal Articles

Fate mapping of the cellular blastoderm stage egg of the silkworm, ${{it Bombyx mori}}$, by localized irradiation of heavy ion microbeams

Kiguchi, Kenji*; Kinjo, Y.*; Masahashi, K.*; Tu, Z.; Tamura, Hajime*; Shirai, K.*; Kanekatsu, Rensuke*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi

JAERI-Review 2000-024, TIARA Annual Report 1999, p.51 - 53, 2000/10

no abstracts in English

Journal Articles

Cell surgery applications of heavy ion microbeams

Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi; Yamamoto, Kazuo*; Yamasaki, Shuhei*; Tu, Z. L.*; Kinjo, Y.*; Kiguchi, Kenji*

Proceedings of 11th International Congress of Radiation Research (ICRR-11), 2, p.182 - 186, 2000/00

no abstracts in English

Journal Articles

Effects of heavy ion microbeams on embryogenesis in the silkworm, ${{it Bombyx mori}}$; Morphological changes of the nuclei and cells after spot irradiation

Kiguchi, Kenji*; Shima, T.*; Kinjo, Y.*; Tu, Z. L.*; Yamasaki, Shuhei*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi

JAERI-Review 99-025, TIARA Annual Report 1998, p.53 - 55, 1999/10

no abstracts in English

Journal Articles

Effects of local irradiation of heavy ion beams to the hematopoietic organs of the silkworm, Bombyx mori

Tu, Z. L.*; Shirai, Koji*; Kanekatsu, Rensuke*; Kiguchi, Kenji*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi

Nihon Sanshigaku Zasshi, 68(6), p.491 - 500, 1999/00

no abstracts in English

Journal Articles

Effects of general and local irradiation of heavy ion beams on the development and morphogenesis of the silkworm, Bombyx mori

Tu, Z. L.*; Yamasaki, Shuhei*; Shirai, Koji*; Kanekatsu, Rensuke*; Kiguchi, Kenji*; Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi

Nihon Sanshigaku Zasshi, 68(6), p.443 - 453, 1999/00

no abstracts in English

Oral presentation

Development of a novel genetic engineering system using a plasmid from radioresistant bacterium

Sato, Katsuya; Oba, Hirofumi*; Tu, Z.*; Narumi, Issei

no journal, , 

no abstracts in English

Oral presentation

Development of novel genetic engineering technique in the radioresistant bacterium

Sato, Katsuya; Oba, Hirofumi*; Tu, Z.*; Narumi, Issei

no journal, , 

To develop new shuttle vectors for ${it Deinococcus}$ species, the nucleotide sequence of the small cryptic plasmid pUE30 from ${it Deinococcus radiopugnans}$ was determined. The 2,467-bp plasmid possesses two open reading frames (Orf1 and Orf2). Hybrid plasmids consisting of pUE30 and pKatCAT5, which replicates in ${it E. coli}$ with a chloramphenicol resistance determinant, were shown to autonomously replicate in ${it D. grandis}$. Deletion analysis revealed that Orf2 was necessary for replication of the plasmids in ${it D. grandis}$. An expression plasmid that possesses the ${it D. radiodurans}$ minimal ${it groE}$ promoter was constructed, and a firefly luciferase gene was successfully expressed in ${it D. grandis}$. The ${it D. grandis}$ host-vector system developed in this study should prove useful in the bioremediation of radioactive waste and for the investigation of DNA repair mechanisms.

16 (Records 1-16 displayed on this page)
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