Article
Engineering, Biomedical
Rong Chai, Luodan Yu, Caihong Dong, Yipengchen Yin, Sheng Wang, Yu Chen, Qin Zhang
Summary: In this study, a biomimetic radiosensitized platform based on a natural in-situ oxygen-evolving photosynthetic cyanobacteria combined with a high atomic-number two-dimensional (2D) bismuthene is designed and engineered to effectively modulate the radiotherapy-resistant hypoxic tumor environment and achieve sufficient radiation energy deposition into tumor. This platform shows enhanced therapeutic efficacy of radiotherapy and suppressed tumor growth, demonstrating the potential of microorganism-enabled tumor-microenvironment modulation and nanoradiosensitizer-augmented radiotherapy for efficient tumor treatment.
BIOACTIVE MATERIALS
(2022)
Article
Plant Sciences
Ivo H. M. van Stokkum, Parveen Akhtar, Avratanu Biswas, Petar H. Lambrev
Summary: This study investigates the energy transfer mechanism from phycobilisomes to photosystem I in cyanobacteria. The results show that about 40% of the terminal emitters in phycobilisomes transfer their energy to photosystem I at a relatively high rate, providing evidence for specific interactions between phycobilisomes and photosystem I.
FRONTIERS IN PLANT SCIENCE
(2023)
Review
Plant Sciences
Yang Chen, Boran Xu, Ruoqing Yao, Changhui Chen, Chunxi Zhang
Summary: The oxygen-evolving center in photosystem II plays a crucial role in the water splitting reaction of artificial photosynthesis. However, the lack of a precise chemical model has hindered the understanding of its structure-function relationship. Recent advances in synthesizing artificial clusters that closely mimic the oxygen-evolving center have provided an opportunity to study its structure-function relationship and design efficient catalysts for water splitting in artificial photosynthesis.
FRONTIERS IN PLANT SCIENCE
(2022)
Review
Plant Sciences
Thomas Oliver, Tom D. Kim, Joko P. Trinugroho, Violeta Cordon-Preciado, Nitara Wijayatilake, Aaryan Bhatia, A. William Rutherford, Tanai Cardona
Summary: Recent advances in understanding the origin and evolution of photosystem II are reviewed and discussed, revealing that water oxidation occurred early in the history of life. Photosystem II has remained relatively unchanged for billions of years, but constant duplication of the D1 subunit has allowed the enzyme to adapt to different environments and even develop enzymatic functions beyond water oxidation. This adaptability could be utilized to develop novel light-powered enzymes for sustainable biocatalysis.
ANNUAL REVIEW OF PLANT BIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Pablo Vergara-Barros, Jaime Alcorta, Angelica Casanova-Katny, Dennis J. Nuernberg, Beatriz Diez
Summary: This study investigates the thermotolerance of the cyanobacterium Fischerella thermalis in hot springs, revealing its ability to maintain photosynthetic activity at high temperatures and providing insights into the genetic and metabolic mechanisms involved in thermal adaptation.
Review
Plant Sciences
Christine H. Foyer, Guy Hanke
Summary: ROS like singlet oxygen, superoxide, and hydrogen peroxide serve as markers of living cells and are produced abundantly during oxygenic photosynthesis. These ROS act as signals within chloroplasts, influencing cellular processes and redox signaling pathways. The challenge lies in understanding the organized delivery of regulated ROS from the photosynthetic electron transport chain to transmit redox signals from the environment to the nucleus, with stromal carbohydrate metabolism also playing a key role in chloroplast signaling pathways.
Article
Plant Sciences
Bradley C. Posch, Julia Hammer, Owen K. Atkin, Helen Bramley, Yong-Ling Ruan, Richard Trethowan, Onoriode Coast
Summary: Wheat photosynthetic heat tolerance can be quantified using minimal chlorophyll fluorescence to measure the critical temperature. We investigated the intraspecies variation and plasticity of wheat T-crit under elevated temperature and found it to be unrelated to global patterns of interspecies heat tolerance. The observed genotypic variation and plasticity suggest that T-crit could be a useful trait for phenotyping wheat photosynthetic heat tolerance.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Microbiology
Patrick E. Thomas, Colin Gates, William Campodonico-Burnett, Jeffrey C. Cameron
Summary: The zam gene, responsible for resistance to acetazolamide in cyanobacteria, has unique characteristics and plays important roles in growth and pigmentation. The cysteine residues in Zam are essential for its function and may be involved in the regulation of photosynthesis in cyanobacteria.
Editorial Material
Biology
Elisabet Romero
Summary: Two species of photosynthetic cyanobacteria can survive in far-red light, but they either become less resilient to photodamage or less energy efficient.
Article
Plant Sciences
Jian Wei Tay, Jeffrey C. Cameron
Summary: In this study, an automated approach using time-lapse fluorescence microscopy and computational image analysis was employed to study the dynamics and effects of photodamage in single cells at subcellular resolution in cyanobacteria. The results reveal an asymmetric cellular response to photodamage between sibling cells and the generation of an elusive subcellular structure, called a 'photoendosome', which could indicate the presence of a previously unknown photoprotective mechanism.
PHOTOSYNTHESIS RESEARCH
(2023)
Review
Microbiology
Virginia M. Johnson, Himadri B. Pakrasi
Summary: Photosystem II is a light-driven water-plastoquinone oxidoreductase that plays a crucial role in maintaining high photosynthetic activity at the cellular level. Studying its lifecycle in cyanobacteria, especially through new structural findings enabled by cryo-electron microscopy, provides valuable insights into Photosystem II assembly and repair.
Article
Plant Sciences
Man Zhang, Jing Zhao, Wanying Li, Shuqi Wen, Huiling Huang, Jie Dong, Bing Liu, Gong Zhang, Hong-Bin Wang, Yanting Shen, Hong-Lei Jin
Summary: Tibet-0, a type of Arabidopsis thaliana collected from the Qinghai-Tibet Plateau, shows higher photosynthetic efficiency under high-light conditions compared to plants from lower altitudes. This is attributed to enhanced PSII activity, increased abundance of PSII complexes and subunits, and activated expression of chloroplast ribosomal protein-related genes in Tibet-0. These findings indicate that high-altitude plants have evolved mechanisms for enhanced photoprotection and efficient translation of PSII proteins in response to high-light environments.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2021)
Article
Biochemistry & Molecular Biology
Rui Miao, Michael Jahn, Kiyan Shabestary, Gilles Peltier, Elton P. Hudson
Summary: Barcoded mutant libraries are a powerful tool for studying gene function in microbes. In this study, a CRISPR interference library of the cyanobacterium Synechocystis sp. PCC 6803 was screened in 11 different growth conditions, revealing condition-specific gene fitness. The data set provides new insights into gene regulation and identifies potential functions for previously unannotated genes and central metabolic enzymes. Machine learning was used to predict the potency of sgRNA sequences, showing the importance of specific nucleotide patterns. The results of this study contribute to our understanding of microbial gene function and regulation.
Article
Plant Sciences
Kelsey K. Dahlgren, Colin Gates, Thomas Lee, Jeffrey C. Cameron
Summary: Cyanobacteria have unique intracellular organization that has been challenging to study with conventional methods. Proximity-based proteomics techniques, such as using the APEX2 enzyme, offer a new approach to study specific cellular regions with enhanced resolution. The use of APEX2 has shown promise in understanding intracellular features and processes in cyanobacteria, such as photosystem II assembly.
PHOTOSYNTHESIS RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Thomas Oliver, Patricia Sanchez-Baracaldo, Anthony W. Larkum, A. William Rutherford, Tanai Cardona
Summary: This study compares the core antenna subunit duplication in photosystem II with early events in the history of life, providing additional evidence supporting the premise that water oxidation originated closer to the origin of life and bioenergetics than previously thought.
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2021)
Article
Chemistry, Multidisciplinary
Viet-Ha Tran, Takeshi Yatabe, Takahiro Matsumoto, Hidetaka Nakai, Kazuharu Suzuki, Takao Enomoto, Takashi Hibino, Kenji Kaneko, Seiji Ogo
CHEMICAL COMMUNICATIONS
(2015)
Article
Chemistry, Multidisciplinary
Takeshi Yatabe, Mitsuhiro Kikkawa, Takahiro Matsumoto, Keishi Urabe, Andrew Robertson, Hidetaka Nakai, Seiji Ogo
Article
Chemistry, Multidisciplinary
Viet-Ha Tran, Takeshi Yatabe, Takahiro Matsumoto, Hidetaka Nakai, Kazuharu Suzuki, Takao Enomoto, Seiji Ogo
Article
Chemistry, Inorganic & Nuclear
Takahiro Matsumoto, Tatsuya Ando, Yuki Mori, Takeshi Yatabe, Hidetaka Nakai, Seiji Ogo
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2015)
Article
Chemistry, Multidisciplinary
Keisuke Takashita, Takahiro Matsumoto, Takeshi Yatabe, Hidetaka Nakai, Masatatsu Suzuki, Seiji Ogo
Article
Chemistry, Multidisciplinary
Koji Yoshimoto, Takeshi Yatabe, Takahiro Matsumoto, Andrew Robertson, Hidetaka Nakai, Hiromasa Tanaka, Takashi Kamachi, Yoshihito Shiota, Kazunari Yoshizawa, Koichiro Asazawa, Hirohisa Tanaka, Seiji Ogo
Article
Chemistry, Multidisciplinary
Keisuke Takashita, Takahiro Matsumoto, Takeshi Yatabe, Hidetaka Nakai, Seiji Ogo
Article
Chemistry, Inorganic & Nuclear
Koji Yoshimoto, Takeshi Yatabe, Takahiro Matsumoto, Viet-Ha Tran, Andrew Robertson, Hidetaka Nakai, Koichiro Asazawa, Hirohisa Tanaka, Seiji Ogo
DALTON TRANSACTIONS
(2016)
Article
Multidisciplinary Sciences
Seiji Ogo, Takahiro Kishima, Takeshi Yatabe, Keishi Miyazawa, Ryunosuke Yamasaki, Takahiro Matsumoto, Tatsuya Ando, Mitsuhiro Kikkawa, Miho Isegawa, Ki-Seok Yoon, Shinya Hayami
Article
Chemistry, Multidisciplinary
Seiji Ogo, Takeshi Yatabe, Tamon Tome, Riko Takenaka, Yoshihito Shiota, Kenji Kato
Summary: In this study, a homogeneous catalyst is used to synthesize hydrogen peroxide using H2 and O2 in water, eliminating the need for flammable H2/O2 mixtures and cocatalysts. The catalyst is capable of extracting electrons from H2, storing them for the reduction of O2, and then converting the reduced oxygen to H2O2. The catalyst exhibits the highest turnover number (TON) among all homogeneous catalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Chiaki Takahashi, Takeshi Yatabe, Hidetaka Nakai, Seiji Ogo
Summary: Chemists have made efforts to control the reactivity of H-2 and this study presents the first example of a Ni-I complex synthesized from a Ni-II complex by reaction with H-2, which remains stable for over 3 months at room temperature.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Seiji Ogo, Takeshi Yatabe, Tamon Tome, Riko Takenaka, Yoshihito Shiota, Kenji Kato
Summary: This paper reports a method for the synthesis of H2O2 using a homogeneous catalyst in water, using only H2 and O2 without flammable mixtures or cocatalysts. The catalyst can remove electrons from H2, store them for the reduction of O2, and allow the protonation of the reduced oxygen to form H2O2. The turnover number (TON) is 910 under an H2/O2 (95/5) atmosphere (1.9 MPa) for 12 hours at 23 degrees C, which is the highest among any homogeneous catalysts. Furthermore, a reaction mechanism based on two crystal structures is proposed.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Daiki Shimauchi, Takeshi Yatabe, Yuka Ikesue, Yuu Kajiwara, Taro Koide, Tatsuya Ando, Ki-Seok Yoon, Hidetaka Nakai, Seiji Ogo
Summary: The paper presents an Ir complex that can extract electrons from H-2 at room temperature and store them as a H2-derived energy carrier. Additionally, the paper demonstrates the reduction of CO2 to a metal-CO(2)(2-) species by this complex at room temperature and provides the first electrospray ionisation mass spectrum for this compound.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Seiji Ogo, Yuki Mori, Tatsuya Ando, Takahiro Matsumoto, Takeshi Yatabe, Ki-Seok Yoon, Hideki Hayashi, Masashi Asano
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2017)
Article
Chemistry, Multidisciplinary
Takeshi Yatabe, Takahiro Kishima, Hideaki Nagano, Takahiro Matsumoto, Mikio Yamasaki, Ki-Seok Yoon, Seiji Ogo
