Takayuki Ohnuma

1.7k total citations
77 papers, 1.3k citations indexed

About

Takayuki Ohnuma is a scholar working on Molecular Biology, Plant Science and Biotechnology. According to data from OpenAlex, Takayuki Ohnuma has authored 77 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 72 papers in Molecular Biology, 42 papers in Plant Science and 32 papers in Biotechnology. Recurrent topics in Takayuki Ohnuma's work include Studies on Chitinases and Chitosanases (60 papers), Legume Nitrogen Fixing Symbiosis (36 papers) and Enzyme Production and Characterization (32 papers). Takayuki Ohnuma is often cited by papers focused on Studies on Chitinases and Chitosanases (60 papers), Legume Nitrogen Fixing Symbiosis (36 papers) and Enzyme Production and Characterization (32 papers). Takayuki Ohnuma collaborates with scholars based in Japan, Thailand and Finland. Takayuki Ohnuma's co-authors include Toki Taira, Tamo Fukamizo, Tamo Fukamizo, Tomoyuki Numata, Shoko Onaga, Naoyuki Umemoto, Takuo Osawa, Etsuko Katoh, Shoko Shinya and Katsuyoshi Murata and has published in prestigious journals such as Journal of Biological Chemistry, SHILAP Revista de lepidopterología and Biochemistry.

In The Last Decade

Takayuki Ohnuma

73 papers receiving 1.3k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Takayuki Ohnuma Japan 22 999 544 390 124 110 77 1.3k
David J. Jeenes United Kingdom 28 1.5k 1.5× 360 0.7× 584 1.5× 42 0.3× 13 0.1× 46 2.0k
Christopher H. Taron United States 23 1.3k 1.3× 127 0.2× 172 0.4× 245 2.0× 47 0.4× 55 1.6k
Vincent G. H. Eijsink Norway 15 974 1.0× 302 0.6× 420 1.1× 188 1.5× 61 0.6× 22 1.1k
Sônia Maria de Freitas Brazil 20 734 0.7× 250 0.5× 193 0.5× 50 0.4× 36 0.3× 79 1.1k
Nathalie Declerck France 24 1.5k 1.5× 277 0.5× 759 1.9× 15 0.1× 13 0.1× 55 1.9k
Christophe Goulard France 26 1.3k 1.3× 215 0.4× 119 0.3× 80 0.6× 22 0.2× 35 1.8k
Jean‐Pierre Bohin France 26 610 0.6× 451 0.8× 291 0.7× 47 0.4× 2 0.0× 42 1.3k
Rainer Stuike‐Prill United States 10 363 0.4× 287 0.5× 47 0.1× 212 1.7× 36 0.3× 12 648
Octavio Monasterio Chile 22 853 0.9× 75 0.1× 45 0.1× 71 0.6× 58 0.5× 63 1.3k
J. Brandão-Neto United Kingdom 18 729 0.7× 135 0.2× 183 0.5× 72 0.6× 19 0.2× 55 1.1k

Countries citing papers authored by Takayuki Ohnuma

Since Specialization
Citations

This map shows the geographic impact of Takayuki Ohnuma's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Takayuki Ohnuma with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Takayuki Ohnuma more than expected).

Fields of papers citing papers by Takayuki Ohnuma

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Takayuki Ohnuma. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Takayuki Ohnuma. The network helps show where Takayuki Ohnuma may publish in the future.

Co-authorship network of co-authors of Takayuki Ohnuma

This figure shows the co-authorship network connecting the top 25 collaborators of Takayuki Ohnuma. A scholar is included among the top collaborators of Takayuki Ohnuma based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Takayuki Ohnuma. Takayuki Ohnuma is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Takahashi, Shuji, et al.. (2023). Synthesis of Oligoglucosamine Analogues Containing the <i>N</i>,<i>N</i>,<i>N</i>-Trimethyl-d-glucosaminyl Unit by Automated Electrochemical Assembly. SHILAP Revista de lepidopterología. 91(11). 112013–112013. 2 indexed citations
2.
3.
Tanaka, Jun, et al.. (2022). Characterization of two rice GH18 chitinases belonging to family 8 of plant pathogenesis-related proteins. Plant Science. 326. 111524–111524. 8 indexed citations
4.
Ogata, Makoto, Tamo Fukamizo, & Takayuki Ohnuma. (2021). Thermodynamic Analysis for Binding of 4-O-β-tri-N-acetylchitotriosyl Moranoline, a Transition State Analogue Inhibitor for Hen Egg White Lysozyme. Frontiers in Molecular Biosciences. 8. 654706–654706. 3 indexed citations
5.
Morimoto, Yusuke V., Shuji Takahashi, Toshiki Nokami, et al.. (2020). Kinetic and thermodynamic insights into the inhibitory mechanism of TMG-chitotriomycin on Vibrio campbellii GH20 exo-β-N-acetylglucosaminidase. Carbohydrate Research. 499. 108201–108201. 7 indexed citations
6.
Suginta, Wipa, et al.. (2016). The chitin-binding domain of a GH-18 chitinase from Vibrio harveyi is crucial for chitin-chitinase interactions. International Journal of Biological Macromolecules. 93(Pt A). 1111–1117. 37 indexed citations
7.
Umemoto, Naoyuki, Takayuki Ohnuma, Tomoyuki Numata, et al.. (2015). A class III chitinase without disulfide bonds from the fern, Pteris ryukyuensis: crystal structure and ligand-binding studies. Planta. 242(4). 895–907. 16 indexed citations
8.
Ohnuma, Takayuki, Naoyuki Umemoto, Takuya Nagata, et al.. (2014). Crystal structure of a “loopless” GH19 chitinase in complex with chitin tetrasaccharide spanning the catalytic center. Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics. 1844(4). 793–802. 32 indexed citations
9.
Mahata, Maria Endo, Shoko Shinya, Takashi Yamamoto, et al.. (2013). Production of chitooligosaccharides from Rhizopus oligosporus NRRL2710 cells by chitosanase digestion. Carbohydrate Research. 383. 27–33. 21 indexed citations
10.
Ohnuma, Takayuki, Naoyuki Umemoto, Toki Taira, Tamo Fukamizo, & Tomoyuki Numata. (2013). Crystallization and preliminary X-ray diffraction analysis of an active-site mutant of `loopless' family GH19 chitinase fromBryum coronatumin a complex with chitotetraose. PubMed. 69(12). 1360–1362. 3 indexed citations
11.
Ogata, Makoto, Naoyuki Umemoto, Takayuki Ohnuma, et al.. (2013). A Novel Transition-state Analogue for Lysozyme, 4-O-β-Tri-N-acetylchitotriosyl Moranoline, Provided Evidence Supporting the Covalent Glycosyl-enzyme Intermediate*. Journal of Biological Chemistry. 288(9). 6072–6082. 24 indexed citations
12.
Ohnuma, Takayuki, et al.. (2011). Chitin oligosaccharide binding to a family GH19 chitinase from the moss Bryum coronatum. FEBS Journal. 278(21). 3991–4001. 38 indexed citations
13.
Ohnuma, Takayuki, et al.. (2011). Crystal structure and mode of action of a class V chitinase from Nicotiana tabacum. Plant Molecular Biology. 75(3). 291–304. 38 indexed citations
14.
Ohnuma, Takayuki, Takuo Osawa, Tamo Fukamizo, & Tomoyuki Numata. (2010). Crystallization and preliminary X-ray diffraction analysis of a class V chitinase fromNicotiana tabacum. Acta Crystallographica Section F Structural Biology and Crystallization Communications. 66(12). 1599–1601. 2 indexed citations
15.
Fukamizo, Tamo, et al.. (2009). A flexible loop controlling the enzymatic activity and specificity in a glycosyl hydrolase family 19 endochitinase from barley seeds (Hordeum vulgare L.). Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics. 1794(8). 1159–1167. 18 indexed citations
16.
Ohnuma, Takayuki, Shoko Onaga, Katsuyoshi Murata, Toki Taira, & Etsuko Katoh. (2007). LysM Domains from Pteris ryukyuensis Chitinase-A. Journal of Biological Chemistry. 283(8). 5178–5187. 103 indexed citations
17.
Ohnuma, Takayuki, Toki Taira, Takeshi Yamagami, Yoichi Aso, & Masatsune Ishiguro. (2004). Molecular Cloning, Functional Expression, and Mutagenesis of cDNA Encoding Class I Chitinase from Rye (Secale cereale) Seeds. Bioscience Biotechnology and Biochemistry. 68(2). 324–332. 14 indexed citations
18.
Yamagami, Takeshi, Takayuki Ohnuma, Hideki Hirakawa, et al.. (2003). Mutational Analysis of Amino Acid Residues Involved in Catalytic Activity of a Family 18 Chitinase from Tulip Bulbs. Bioscience Biotechnology and Biochemistry. 67(2). 341–346. 8 indexed citations
19.
Ohnuma, Takayuki, Mikako Yagi, Takeshi Yamagami, et al.. (2002). Molecular Cloning, Functional Expression, and Mutagenesis of cDNA Encoding Rye (Secale cereale) Seed Chitinase-c. Bioscience Biotechnology and Biochemistry. 66(2). 277–284. 17 indexed citations
20.
Taira, Toki, Takayuki Ohnuma, Takeshi Yamagami, et al.. (2002). Antifungal Activity of Rye (Secale cereale) Seed Chitinases: the Different Binding Manner of Class I and Class II Chitinases to the Fungal Cell Walls. Bioscience Biotechnology and Biochemistry. 66(5). 970–977. 64 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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