九州大学 研究者情報
発表一覧
濱村 奈津子(はまむら なつこ) データ更新日:2020.02.20

准教授 /  理学研究院 生物科学部門 動態生態学


学会発表等
1. Natsuko Hamamura, Tomotaka Okubo, Satoshi Mitsunobu, Microbial Biotransformation of Toxic Metalloids and Its Bioremediation Potentials, International Conference on Materials and Systems for Sustainability 2019, 2019.11.
2. @濱村奈津子, ヒ素の環境挙動に影響を及ぼす微生物代謝機構の多様性, 資源・素材学会2019, 2019.09.
3. 高山清一郎、和穎朗太、荒井見和、濱村奈津子, 土壌の複雑な微環境における土壌細菌群集構造のミクロレベル解析, 日本微生物生態学会第33回大会, 2019.09.
4. 大久保公貴、山下葉里子、濱村奈津子, 微生物有害元素代謝の多様性:嫌気的アンチモン酸化細菌群の代謝機構と系統分布, 日本微生物生態学会第33回大会, 2019.09.
5. Hamamura, N., Yamashita, Y., Kataoka, T., Mitsunobu, S., Diversity of microbial arsenic and antimony transformation pathways associated with antimony mine tailing, Goldschmidt2019, 2019.09, Arsenic (As) and antimony (Sb) are both naturally occurring toxic metalloids and are considered to be priority pollutants of interest by the USEPA. Antimony is commonly associated with As in the environment and both elements have similar chemistry and toxicity. The trivalent forms, AsIII and SbIII, are highly reactive with thiol-containing proteins and more toxic to biota than AsV and SbV. Despite their toxicity, microorganisms have developed mechanisms to tolerate and catalyze redox transformation of As and Sb. In this study, we characterized microbial metalloid transformation pathways associated with stibnite mine tailing soils (Ehime, Japan). Total concentrations of Sb and As in the surface soils were 2.28 and 1.24 g kg-1, respectively [1]. By conducting enrichment culturing, relevant As and Sb-transforming bacteria, including aerobic SbIII-oxidizing Pseudomonas and Stenotrophomonas strains and an anaerobic SbIII-oxidizing Mesorhizobium strain, were isolated. These SbIII-oxidizing isolates did not oxidize AsIII, suggesting the involvement of different mechanisms for Sb and As oxidation. In addition, an anaerobic consortium capable of reducing SbV in the presence of lactate were obtained and the precipitation of antimonite as antimony trioxide was confirmed by X-ray absorption near-edge structure (XANES). The influence of the co-contamination with Sb and As on mine soil microbial community was also examined. It was shown that the presence of Sb species affected AsIII oxidation rates and selected distinct AsIII-oxidizing bacteria with higher tolerance to As and Sb toxicity [2]. Collectively, our study revealed the presence of diverse microbial metalloid transformation pathways associated with polluted environments, and the importance of co-existing metalloid as a factor affecting the redox transformation and mobility of arsenic in natural systems..
6. Hamamura, N., Kataoka, T., Functional analysis of microbial communities associated with arsenic transformation in contaminated soil., The 11th Asian Symposium on Microbial Ecology, 2019.05.
7. Yoriko Yamashita, Natsuko Hamamura., Characterization and diversity of microbial antimony transformation pathways, The 32nd JSME and 10th ASME, 2018.07.
8. Hamamura, N., Microbial biotransformation of toxic metalloids, 環境微生物学最前線2017, 2018.02.
9. Misaki Eto, Tetsukazu Yahara, Arika Kuroiwa, Natsuko Hamamura., 屋久島に生息するヤクシカ (Cervus nippon yakushimae) のルーメンマイクロバイオームの多様性, 環境微生物系合同大会2017, 2017.08.
10. Hamamura, N., Mitsunobu, S., Microbial biotransformation of toxic metalloids and its bioremediation implications, The 14th International Symposium on Persistent Toxic Substance, 2017.09.
11. S Amachi, T Tsuchiya, Y Kasahara, N Hamamura, Biogeochemical aresnic cycling unraveled by microbial genome analysis, JpGU-AGU Joint Meeting 2017, 2017.05.
12. Misaki Eto, Tetsukazu Yahara, Arika Kuroiwa, Natsuko Hamamura, Diversity and composiiton of rumen microbiome in Sika deers (Cervus nippon yakushimae) from Yakushima Island, Japan, The 9th Asian Symposium on Microbial Ecology, 2017.04.
13. 土屋 達哉、笠原 康裕、濱村奈津子、天知 誠吾, 異化的ヒ酸還元細菌によるヒ素ストレス応答機構の発現解析, 日本微生物生態学会第31会大会, 2016.10.
14. 片岡 剛文、濱村奈津子, 土壌環境のヒ素挙動に関与する微生物群集機能の解明, 日本微生物生態学会第31会大会, 2016.10.
15. Hamamura, N., Huang, H., Damdinsuren, N., Diversity of microbial arsenic transformation pathways and community response to arsenic in a saline lake habitat, The 8th Asian Symposium on Microbial Ecology, 2016.09.
16. Hamaura, N., Utsunomiya, S., Nakano, Y., Mitsunobu, S., Microbial antimony transformation associated with antimony mine tailing, Goldschmidt2016, 2016.06.
17. Hamamura, N., Mitsunobu, S., Diversity of microbial metalloid transformation pathways and its geochemical implications, Japan Geoscience Union Meeting 2016, 2016.05.
18. 濱村 奈津子, Thinking outside the box! 環境や社会を変える微生物そして人間社会の多様性, 第67回日本生物工学会大会, 2015.10.
19. Natsuko Hamamura, Diversity of microbial arsenic transformation pathways associated with arsenic impacted environments, 4th Internationa Congress on Natural Science, 2015.09.
20. 濱村奈津子、カナリー ロバート, 複合汚染に対する微生物遺伝子応答の網羅解析によるゲノムレベルでの毒性影響評価, NGS現場の会 第4回研究会, 2015.07.
21. Natsuko Hamamura, Kumiko Mori, Satoshi Mitsunobu, Microbial transformation of antimony and its geochemical implications., Japan Geoscience Union Meeting 2015, 2015.05.
22. Natsuko Hamamura, Biotransformation of toxic metalloids associated with contaminated environments: cellular to community level function and response, Interdisciplinary symposium on Environmental Microbiology for sustainable society, 2015.02.
23. 江原彩香、Timothy Sanchez、Srinivas Iyer、Chris Yeager、濱村奈津子、鈴木治夫、天知誠吾, 異化的ヒ酸呼吸菌Geobacter sp. OR-1株のプロテオーム解析, 環境微生物系学会合同大会2014, 2014.10.
24. Kataoka, T., Hamamura, N., Effect of antimony on arsenite oxidation by soil microbial community., 環境微生物系学会合同大会2014, 2014.10.
25. Natsuko Hamamura, Huang, H., Damdinsuren, N., Diversity of microbial arsenic transformation pathways associated with an alkaline saline lake in northern Mongolia., 15th International Symposium on Microbial Ecology Annual Meeting, 2014.08.
26. 濱村 奈津子, 変動する環境における微生物生態系:遺伝子から群集レベルでの機能と応答, 日本微生物生態学会第29回大会 , 2013.11.
27. 片岡 剛文、濱村奈津子, 有害元素複合曝露に対する土壌微生物群集の応答とヒ素酸化能への影響, 日本微生物生態学会第29回大会 , 2013.11.
28. Hamamura, N., Fukushima, K., Huang, H., Kataoka, T., Microbial transformation of toxic elements associated with mine tailing, The 5th Taiwan-Korea-Japan International Symposium on Microbial Ecology, 2013.11.
29. Huang, H., Takemoto, K., Hamamura, N., Bioinformatics analysis in meta-transcriptome profiling of microbial response to toxic elements exposure, Annual Convention of Japanese Society for Bioinformatics, 2013.10.

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