Article
Chemistry, Organic
Vikram Thimaradka, Hayata Utsunomiya, Tomonori Tamura, Itaru Hamachi
Summary: The His-tag/NiNTA interaction promotes a new catalytic protein acylation strategy, enabling selective protein labeling in biological milieu. The recognition-assisted activation mechanism allows for efficient protein labeling at lower substrate concentrations, enabling highly selective and efficient cell-surface receptor modification in live cells.
Article
Biology
Thomas G. W. Graham, John Joseph Ferrie, Gina M. Dailey, Robert Tjian, Xavier Darzacq
Summary: Single-molecule imaging is a powerful tool for studying biochemical processes in live cells, but tracking single molecules and detecting their interactions simultaneously remains challenging. This study describes a novel property of rhodamine dyes, proximity-assisted photoactivation (PAPA), which allows the detection of protein-protein interactions in live cells using two different labeled protein complexes in proximity.
Article
Chemistry, Analytical
Xue Zhang, Qin Wei, Xin Meng, Lili Zhao, Zhaosheng Liu, Yanping Huang
Summary: A new strategy utilizing a dendrimer-like structure of boron materials based on octavinyl-polyhedral oligomeric silsesquioxanes (Ov-POSS) was suggested to improve boronate avidity with good accessibility of sites. The resulting Ov-POSS cross-linked boron monolith showed significantly stronger affinity for glycoproteins compared to the Ov-POSS-free monolith. The developed microfluidic platform, which integrated multiple functions, demonstrated high efficiency and high-throughput analysis for post-translational modification proteomics.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Ben Ma, Qi Xia, Deyang Wang, Ji-Kang Jin, Zekun Li, Qiu-Jiang Liang, Meng-Ying Sun, Dongyi Liu, Li-Juan Liu, Hui-Xing Shu, Jun Yang, Dan Li, Jian He
Summary: Visible-light copper photocatalysis has become a viable technology for sustainable synthetic processes. In this study, a metal-organic framework (MOF)-supported copper(I) photocatalyst was developed for iminyl radical-mediated reactions. The heterogenized copper photosensitizer exhibited higher catalytic activity than its homogeneous counterpart due to site isolation. The immobilization of copper species on MOF supports using a hydroxamic acid linker allowed for high recyclability of the heterogeneous catalysts and the preparation of previously unavailable monomeric copper species through post-synthetic modification on MOF surfaces. This study highlights the potential of MOF-based heterogeneous catalytic systems in addressing challenges in synthetic methodologies and mechanistic investigations of transition-metal photoredox catalysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Xue Yao, Sufeng Zhang, Liwei Qian, Min Du
Summary: The study introduced a novel dendrimer-amplified BA cellulose foam with improved adsorption capacity for glycoproteins. The material demonstrated rapid adsorption equilibrium rate, outstanding adsorption capacity, and the ability to selectively separate glycoproteins from complex biological samples. These cellulose foams show promise for new applications in analytical and biomedical fields.
CARBOHYDRATE POLYMERS
(2021)
Review
Biochemistry & Molecular Biology
Shuo Huang, Rui Dai, Zhiqi Zhang, Han Zhang, Meng Zhang, Zhangjun Li, Kangrui Zhao, Wenjun Xiong, Siyu Cheng, Buhua Wang, Yi Wan
Summary: CRISPR/Cas systems are widely used in gene editing due to their accuracy, programmability, ease of use, and affordability. Additionally, they have been applied in live-cell imaging and bioanalysis, expanding the scope of their use beyond gene editing.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Shaswati Mandal, Guy Mann, Gandhesiri Satish, Ashraf Brik
Summary: The fusion of modified cell-penetrating peptides with synthetic protein analogues can enhance the uptake efficiency of fluorescently labelled proteins in live cells, offering potential for functional studies.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Cell Biology
Zilong Zheng, Guokai Yan, Xiuzhi Li, Yuke Fei, Lingling Sun, Haonan Yu, Yaorong Niu, Weihua Gao, Qing Zhong, Xianghua Yan
Summary: Lysine crotonylation is an important protein post-translational modification that regulates various cellular processes and functions, but its role in nutrient signaling pathways is not well understood. In this study, the authors found a positive correlation between global crotonylation levels and autophagy induced by leucine deprivation. They identified multiple crotonylated proteins regulated by leucine deprivation and discovered that 14-3-3 proteins play a dominant role in leucine-mediated crotonylation. Furthermore, they showed that crotonylation of 14-3-3E disrupts its interaction with binding partners and leads to the release of protein phosphatase 1B (PPM1B), which initiates autophagy. The authors also found that HDAC7 regulates the crotonylation of 14-3-3E. Overall, this study highlights the importance of the 14-3-3E-PPM1B axis regulated by crotonylation in leucine-deprivation-induced autophagy.
Article
Chemistry, Physical
Bao-Gui Cai, Qian Li, Claire Empel, Lei Li, Rene M. Koenigs, Jun Xuan
Summary: In this study, we reported the visible light and N-heterocyclic carbene (NHC) jointly promoted multicomponent carbene transfer reactions. Two kinds of important hydroxamic acid esters were obtained in good yields under optimized reaction conditions depending on the reaction media used. The utility and practicality of this method were demonstrated through mild reaction conditions, excellent functional group tolerance, useful synthetic transformations, and successful modification of natural products and drug molecules.
Article
Biophysics
Yi Sun, Yi Luo, Lu Sun, Xiao-Rui Wang, Li-Wei Chen, Ning Zhang, Yu Wang, Lin-Yi Dong, Hua Guo, Xian-Hua Wang
Summary: We developed an innovative PEGylated boronate affinity cell imprinted polydimethylsiloxane (PBACIP) system for efficient capture and release of circulating tumor cells (CTCs) from cancer patients. The system achieved high selectivity and capture efficiency through the synergistic effect of boronate affinity and cell imprinting, without the use of antibodies. The captured CTCs can be released for downstream analysis.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Biochemistry & Molecular Biology
Shubha Shakya, Roger A. Herr, Haley L. Carlson, Raphael A. Zoeller, Carolyn J. Albert, David A. Ford
Summary: Neutrophils play an important role in injury and repair in various diseases. 2-ClFALD, released by neutrophils, is a potential mediator of endothelial injury. Our study found that 2-ClFALD preferentially modifies proteins compared to 2-ClFA, and these modified proteins may be involved in the endothelial barrier dysfunction caused by 2-ClFALD.
Article
Chemistry, Multidisciplinary
Avijit K. Adak, Kuan-Ting Huang, Chien-Yu Liao, Yuan-Jung Lee, Wen-Hua Kuo, Yi-Ren Huo, Pei-Jhen Li, Yi-Ju Chen, Bo-Shiun Chen, Yu-Ju Chen, Kuo Chu Hwang, Wun-Shang Wayne Chang, Chun-Cheng Lin
Summary: Monoclonal antibodies (mAbs) have great potential in biotherapeutic discovery, and the development of affinity ligands that can conjugate with small molecules is crucial. This study introduces a boronate-affinity-based antibody ligand for labeling and purifying full-length antibodies, allowing for the addition of molecules and selective targeting of cells.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Environmental Sciences
Zhiqiang Huang, Shiyong Zhang, Hongling Wang, Rukuan Liu, Chen Cheng, Shuyi Shuai, Yajing Hu, Yuhui Zeng, Xinyang Yu, Guichun He, Weng Fu, Vladimir E. Burov, Vladimir Z. Poilov
Summary: Tailings ponds for gangue mineral storage are recognized as a dangerous source of toxic minerals. This study synthesized a novel collector, sebacoyl hydroxamic acid (SHA), for recycling wolframite tailings. Experimental results showed that SHA could effectively recover wolframite concentrate using a combined shaking table-flotation process.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Saptashwa Chakraborty, Bijoyananda Mishra, Pratim Kumar Das, Sandip Pasari, Srinivas Hotha
Summary: The silver-assisted gold-catalyzed activation of alkynyl glycosyl carbonate donors is a versatile approach for the synthesis of various types of N-glycosides, including purine and pyrimidine nucleosides, asparagine glycosides, and quinolin-2-one N-glycosides. This method enables the synthesis of nucleosides that are difficult to obtain through other means. Additionally, it can be used to easily synthesize 2'-modified nucleosides and dipeptide disaccharide units of chloroviruses.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Tushar Janardan Pawar, Israel Bonilla-Landa, Alfonso Reyes-Luna, Felipe Barrera-Mendez, Francisco Javier Enriquez-Medrano, Ramon Enrique Diaz-de-Leon-Gomez, Jose Luis Olivares-Romero
Summary: Asymmetric oxidation reaction is a significant pathway in stereoselective reactions, playing a prominent role in both academic and industrial research. Ligands are crucial for planning ideal metal-catalyzed asymmetric oxidation reactions, as they interact with the metal to form catalytically active complexes that can catalyze various asymmetric reactions. Designing and synthesizing novel chiral ligands are essential for researchers in modern asymmetric synthesis. This course presents the applicability and survey of hydroxamic acid as a vital ligand, which is essential for various metal-catalyzed transformations.
Article
Chemistry, Organic
Mina Yamane, Yamato Kanzaki, Harunobu Mitsunuma, Motomu Kanai
Summary: The study utilizes a chlorine radical catalyzed strategy with titanium(IV) chloride to achieve C(sp(3))-H photoalkylation, allowing for hydrogen-atom transfer of unactivated alkanes. This reaction not only couples various alkanes with radical acceptors, but also enables direct photoalkylation of aromatic ketones.
Review
Chemistry, Organic
Yuri Katayama, Harunobu Mitsunuma, Motomu Kanai
Summary: Organochromium(III) species are versatile nucleophiles used in complex molecule synthesis due to their high tolerance of functional groups and chemoselectivity for aldehydes. Traditional methods of carbonyl addition reactions using organochromium(III) species require stoichiometric chromium(II) salts or catalytic chromium salts and stoichiometric reductants. Recent alternative methods involve organoradical formation from readily available starting materials and trapping the radical with stoichiometric or catalytic chromium(II) salts. These methods have the potential to develop sustainable chemical processes.
SYNTHESIS-STUTTGART
(2022)
Article
Chemistry, Organic
Xue Peng, Yuki Hirao, Shunsuke Yabu, Hirofumi Sato, Masahiro Higashi, Takuya Akai, Shigeyuki Masaoka, Harunobu Mitsunuma, Motomu Kanai
Summary: A ternary hybrid catalyst system composed of an acridinium photoredox catalyst, a thiophosphoric imide (TPI) catalyst, and a titanium complex catalyst has been identified to promote an intermolecular addition reaction between organic molecules and ketones through sp(3) C-H bond activation. This reaction provides an efficient and straightforward route to a broad range of tertiary alcohols.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Hiromu Fuse, Yu Irie, Masaaki Fuki, Yasuhiro Kobori, Kosaku Kato, Akira Yamakata, Masahiro Higashi, Harunobu Mitsunuma, Motomu Kanai
Summary: In this study, we developed an organocatalyst system that can promote the cleavage of stable C-H bonds through a hydrogen atom transfer process without the use of exogenous photosensitizers. The electronically tuned thiophosphoric acid, 7,7'-OMe-TPA, was assembled with substrate or co-catalyst N-heteroaromatics to form electron donor-acceptor complexes. Photoirradiation of these complexes induced stepwise single-electron transfer processes to generate a HAT-active thiyl radical. Spectroscopic studies and theoretical calculations characterized the stepwise SET process mediated by short-lived intermediates. This organocatalytic HAT system showed high functional group tolerance in four different C-H functionalization reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Organic
Rahul A. Jagtap, Motomu Kanai
Summary: Catalytic acceptorless dehydrogenation of organic molecules plays a crucial role in fine-chemical synthesis as well as in energy storage and transport. Our research group aims to develop mild catalytic acceptorless dehydrogenation protocols, mainly using photoredox approaches. In this account, we discuss the advances made by our group on the dehydrogenation of saturated N-heterocycles, aliphatic alcohols, and challenging hydrocarbons.
Article
Chemistry, Organic
Motomu Kanai, Yuma Takeuchi
Summary: We are investigating catalytic approaches in the chemical networks of living organisms, which can activate stable molecules under physiological conditions and form the basis of catalysis medicine. Our research contributes to progress in both physical and life sciences. In this Perspective, we provide an overview of catalysis medicine and share examples of our recent achievements in synthetic epigenetics and amyloid degradation. This Perspective highlights the potential of catalysis research in solving interdisciplinary problems.
Article
Biochemical Research Methods
Katarzyna Joanna Malawska, Shinjiro Takano, Kounosuke Oisaki, Haruaki Yanagisawa, Masahide Kikkawa, Tatsuya Tsukuda, Motomu Kanai
Summary: We developed a method for bioconjugation of Au25 nanoclusters to monoclonal antibodies. This method allows for the attachment of the nanoclusters to rarely exposed tryptophan residues, making them suitable for high-resolution imaging techniques such as cryo-EM and cryo-ET. The use of hydroxylamine reagents instead of N-oxyl radicals improved the selectivity of the bioconjugation process, enabling the labeling of acid-sensitive proteins.
BIOCONJUGATE CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Kenzo Yamatsugu, Motomu Kanai
Summary: Carbohydrates, as fundamental units in biological processes, play pivotal roles. Developing methods for synthesizing, functionalizing, and manipulating carbohydrates is essential for understanding their functions and creating sugar-based functional materials. New approaches to site-selective transformations of carbohydrates are of great significance for revolutionizing sugar chemistry and accessing sugars of interest.
Article
Biology
Haruka Oda, Yuko Sato, Shigehiro A. Kawashima, Yusuke Fujiwara, Mate Palfy, Edlyn Wu, Nadine L. Vastenhouw, Motomu Kanai, Hiroshi Kimura
Summary: Filamentous actin (F-actin) in the cytoplasm plays a crucial role in cell regulation, and recent studies have discovered its association with various functions in the nucleus. By live imaging of zebrafish embryos, it was shown that F-actin accumulates in nuclei during the interphase and reaches a peak during the prophase. Even after the breakdown of the nuclear envelope, patches of F-actin remain near the condensing chromosomes. This accumulation of F-actin in the nucleus may contribute to proper mitotic progression in zebrafish embryos.
Article
Biochemistry & Molecular Biology
Hiroki Umeda, Taka Sawazaki, Masahiro Furuta, Takanobu Suzuki, Shigehiro A. Kawashima, Harunobu Mitsunuma, Yukiko Hori, Taisuke Tomita, Youhei Sohma, Motomu Kanai
Summary: Catalytic photo-oxygenation is a potential therapeutic approach for tauopathies, but its effects on tau from human patients have not been clarified. In this study, two assay systems were developed to evaluate the catalytic activity on human patient tau. Using these assays, a promising catalyst for oxygenation of human tau was identified. The results also suggest differences between aggregated tau induced by heparin and tau from actual AD patients in developing effective catalysts.
ACS CHEMICAL NEUROSCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Ryota Matsukawa, Mina Yamane, Motomu Kanai
Summary: This review provides a thorough overview of the chemistry, resulting products, mechanisms, and analytical techniques involved in histidine photooxygenation. It explores the practical implications of this transformation in fields such as materials science, biomedical research, and drug development. By bridging the existing gap in literature, it serves as a resource for understanding the intricacies of histidine photooxygenation and its diverse ramifications.
Article
Chemistry, Multidisciplinary
Toshifumi Tatsumi, Koki Sasamoto, Takuya Matsumoto, Ryo Hirano, Kazuki Oikawa, Masato Nakano, Masaru Yoshida, Kounosuke Oisaki, Motomu Kanai
Summary: In recent years, the number of accessible drug modalities has increased. Peptides have become important in pharmaceuticals and biomaterials. Traditional peptide synthesis produces large amounts of chemical waste and burdens the environment. This study presents a new peptide elongation strategy that eliminates the need for complex reagents and protecting groups.
COMMUNICATIONS CHEMISTRY
(2023)