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Affiliation |
Faculty of Agriculture Department of Marine Biological and Environmental Science |
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Title |
Associate Professor |
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External Link |
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URBANCZYK Henryk
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Research Areas 【 display / non-display 】
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Life Science / Bacteriology / Microbial diversity, Microbial evolution, Marine microbiology, Vibrionaceae
Papers 【 display / non-display 】
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Grimontia kaedaensis sp. nov., isolated from the estuary of Kaeda river in Miyazaki, Japan. Reviewed
Sakaguchi M., Urbanczyk Y., Kikuchi T., Urbaczyk H.
International Journal of Systematic and Evolutionary Microbiology 73 2023
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Tracing genomic divergence of Vibrio bacteria in the Harveyi clade Reviewed
Ke H., Liu D., Ogura Y., Hayashi T., Urbanczyk H., Tsai I.
Journal of Bacteriology 200 ( 15 ) 2018.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Bacteriology
© 2018 American Society for Microbiology. The mechanism of bacterial speciation remains a topic of tremendous interest. To understand the ecological and evolutionary mechanisms of speciation in Vibrio bacteria, we analyzed the genomic dissimilarities between three closely related species in the so-called Harveyi clade of the genus Vibrio, V. campbellii, V. jasicida, and V. hyugaensis. The analysis focused on strains isolated from diverse geographic locations over a long period of time. The results of phylogenetic analyses and calculations of average nucleotide identity (ANI) supported the classification of V. jasicida and V. hyugaensis into two species. These analyses also identified two well-supported clades in V. campbellii; however, strains from both clades were classified as members of the same species. Comparative analyses of the complete genome sequences of representative strains from the three species identified higher syntenic coverage between genomes of V. jasicida and V. hyugaensis than that between the genomes from the two V. campbellii clades. The results from comparative analyses of gene content between bacteria from the three species did not support the hypothesis that gene gain and/or loss contributed to their speciation. We also did not find support for the hypothesis that ecological diversification toward associations with marine animals contributed to the speciation of V. jasicida and V. hyugaensis. Overall, based on the results obtained in this study, we propose that speciation in Harveyi clade species is a result of stochastic diversification of local populations, which was influenced by multiple evolutionary processes, followed by extinction events.
DOI： 10.1128/JB.00001-18
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Genomic evidence that Vibrio inhibens is a heterotypic synonym of Vibrio jasicida. Reviewed
Yoshiko Urbanczyk, Yoshitoshi Ogura, Tetsuya Hayashi, Henryk Urbanczyk
International Journal of Systematic and Evolutionary Microbiology 2016.5
Language：English Publishing type：Research paper (scientific journal)
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Urbanczyk Y., Ogura Y., Hayashi T., Urbanczyk H.
Systematic and Applied Microbiology 38 ( 7 ) 2015.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Systematic and Applied Microbiology
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Description of a novel marine bacterium, Vibrio hyugaensis sp. nov., based on genomic and phenotypic characterization Reviewed
Yoshiko Urbanczyk, Yoshitoshi Ogura, Tetsuya Hayashi, Henryk Urbanczyk
Systematic and Applied Microbiology 2015.4
Language：English Publishing type：Research paper (scientific journal)
Books 【 display / non-display 】
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Bergey's Manual of Systematics of Archaea and Bacteria, 1st ed.; Aliivibrio
Henryk Urbanczyk（ Role： Joint author）
John Wiley & Sons, Inc.: Hoboken, NJ, USA, in association with Bergey's Manual Trust. 2020
Language：English Book type：Scholarly book
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Dunlap P., Urbanczyk H.（ Role： Joint author）
The Prokaryotes: Prokaryotic Physiology and Biochemistry 2013.11
Language：English Book type：Scholarly book
© 2013 Springer-Verlag Berlin Heidelberg. All rights are reserved. Luminous bacteria are those bacteria that carry the lux genes, genes that code for proteins involved in light production. Many luminous bacteria emit light at high, easily visible levels in laboratory culture and in nature, and the phenomenon of light emission has generated interest in these bacteria for over 125 years. Luminous bacteria are especially common in ocean environments where they colonize a variety of habitats, but some species are found in brackish, freshwater, and terrestrial environments. This chapter, which begins with an historical perspective, summarizes current understanding of the biochemistry and genetics of bacterial light emission, the taxonomy and phylogenetics of light-emitting bacteria, the evolutionary origins and hypothesized physiological and ecological functions of bacterial luminescence, the distributions and activities of these bacteria in nature, their symbiotic interactions with animals and especially with marine fishes, and the quorum sensing regulatory circuitry controlling light production at the operon level. This chapter concludes with information on the isolation, cultivation, storage, and identification of luminous bacteria.
MISC 【 display / non-display 】
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Phylogeny, genomics, and symbiosis of Photobacterium Invited Reviewed
Urbanczyk H., Ast J., Dunlap P.
FEMS Microbiology Reviews 35 ( 2 ) 324 - 342 2011.3
Language：English Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：FEMS Microbiology Reviews
Photobacterium comprises several species in Vibrionaceae, a large family of Gram-negative, facultatively aerobic, bacteria that commonly associate with marine animals. Members of the genus are widely distributed in the marine environment and occur in seawater, surfaces, and intestines of marine animals, marine sediments and saline lake water, and light organs of fish. Seven Photobacterium species are luminous via the activity of the lux genes, luxCDABEG. Much recent progress has been made on the phylogeny, genomics, and symbiosis of Photobacterium. Phylogenetic analysis demonstrates a robust separation between Photobacterium and its close relatives, Aliivibrio and Vibrio, and reveals the presence of two well-supported clades. Clade 1 contains luminous and symbiotic species and one species with no luminous members, and Clade 2 contains mostly nonluminous species. The genomes of Photobacterium are similar in size, structure, and organization to other members of Vibrionaceae, with two chromosomes of unequal size and multiple rrn operons. Many species of marine fish form bioluminescent symbioses with three Photobacterium species: Photobacterium kishitanii, Photobacterium leiognathi, and Photobacterium mandapamensis. These associations are highly, but not strictly species specific, and they do not exhibit symbiont-host codivergence. Environmental congruence instead of host selection might explain the patterns of symbiont-host affiliation observed from nature. © 2010 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved.
Presentations 【 display / non-display 】
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Speciation in the Harveyi Clade Invited International conference
Urbanczyk Henryk
ASM Conference on Vibrio2017: The Biology of Vibrios (Chicago, USA) American Society for Microbiology (ASM)
Event date： 2017.10.12 - 2017.10.15
Language：English Presentation type：Oral presentation (invited, special)
Venue：Chicago, USA
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Systematics of Vibrionaceae Based on Analysis of Genome Sequence Data International conference
Henryk Urbanczyk
2016 International Meeting of the Microbiological Society of Korea (MSK)
Event date： 2016.4.20 - 2016.4.22
Language：English Presentation type：Oral presentation (invited, special)
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Systematics of "Harveyi clade" bacteria (family Vibrionaceae), using evolutionary bioinformatics. International conference
Henryk Urbanczyk, Yoshitoshi Ogura, Tetsuya Hayashi
13th Japan-China-Korea Bioinformatics Symposium & Training Course
Event date： 2015.8.10 - 2015.8.12
Language：English Presentation type：Oral presentation (invited, special)
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Interspecies and intraspecies recombination frequencies in the `Harveryi clade' bacteria.
Henryk Urbanczyk, Yoshitoshi Ogura, Tetsuya Hayashi
The 48th Symposium on Vibrios
Event date： 2014.11.13 - 2014.11.14
Language：English Presentation type：Oral presentation (general)
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ビブリオ科海洋性細菌の海洋動物との相互作用と進化
Henryk Urbanczyk
第４回 広島大学理学部生物科学同窓会記念講演会 (東広島市) 広島大学
Event date： 2013.11.2
Language：English Presentation type：Oral presentation (invited, special)
Venue：東広島市
Awards 【 display / non-display 】
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Excellent Paper Award of the Society for Biotechnology, Japan (SBJ).
2012.1
Urbanczyk H., Noguchi C., Wu H., Watanabe D., Akao T., Takagi H., Shimoi H.
Award type：International academic award (Japan or overseas) Country：Japan
Grant-in-Aid for Scientific Research 【 display / non-display 】
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How did marine bacterium Vibrio cholerae adapted to freshwater environment?
Grant number：20K07497 2020.04 - 2023.03
Grant-in-Aid for Scientific Research Grant-in-Aid for Scientific Research(C)
Authorship：Principal investigator
Available Technology 【 display / non-display 】
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ビブリオ科細菌の分類および収集
日本沿岸域のビブリオ科細菌の生態に関する研究
淡水および汽水環境に生育するビブリオ科に関する研究Home Page： ウルバンチク研究室
Related fields where technical consultation is available：・ビブリオ科細菌のゲノム解析を基盤とした分類同定
・ビブリオが疑われる魚類病原菌の解析Message：・共同研究の希望テーマ：日本沿岸域のビブリオ科細菌の分布調査
・ビブリオ科細菌を利用した研究開発というニーズがあれば、ぜひご連絡ください。