Article
Chemistry, Multidisciplinary
Fujun Guan, Rong Zhou, Xiaoyu Ren, Zhen Guo, Chengming Wang, Cong-Ying Zhou
Summary: The asymmetric dearomative cyclopropanation of naphthalenes is a rapid method for constructing polycyclic compounds, with high yields and enantioselectivity. This reaction creates multiple stereogenic centers.
Article
Chemistry, Analytical
Lijun Zhao, Jianfei Mao, Li Hu, Shu Zhang, Xiaofeng Yang
Summary: A rapid signal amplified AFB1 detection system based on SRCHA has been developed, which utilizes a catalyzed hairpin assembly reaction to significantly enhance the fluorescence signal for AFB1 detection within 15 minutes with a low detection limit. This system shows great potential for on-site rapid detection of AFB1.
ANALYTICAL METHODS
(2021)
Article
Multidisciplinary Sciences
Ja Yeon Kim Chu, Yu-Chen Chuang, Kuen-Nan Tsai, Jessica Pantuso, Yuji Ishida, Takeshi Saito, Jing-hsiung James Ou
Summary: This study reveals the association between autophagic membranes and HBV replication. The core protein is associated with phagophores, while the precore protein derivative is associated with autophagosomes. Autophagic membranes play different roles in the trafficking of core and precore proteins, as well as the assembly and release of HBV particles.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Pharmacology & Pharmacy
Yue Luo, Junjun Cheng, Zhanying Hu, Haiqun Ban, Shuo Wu, Nicky Hwang, John Kulp, Yuhuan Li, Yanming Du, Jinhong Chang, Usha Viswanathan, Ju-Tao Guo
Summary: The study identified critical Cp amino acid residues for capsid assembly, pgRNA encapsidation, and resistance to CpAMs through systematic mutagenesis analysis. Specific residues such as W102 and Y132 are crucial for capsid assembly, while other residues affect pgRNA encapsidation. Several mutant Cp support high levels of DNA replication but show strong resistance to CpAMs.
ANTIVIRAL RESEARCH
(2021)
Article
Virology
Yuan Zheng, Le Yang, Lin Yu, Yuanfei Zhu, Yang Wu, Zhijun Zhang, Tian Xia, Qiang Deng
Summary: Canocapavir is a novel antiviral agent that is currently in phase II clinical trial for hepatitis B virus (HBV) infection. It prevents the encapsidation of HBV pregenomic RNA and increases the accumulation of cytoplasmic empty capsids by targeting the hydrophobic pocket of HBV core protein (HBc). Canocapavir treatment reduces the egress of naked capsids and interferes with the interaction between HBc and HBV large surface protein, resulting in diminished production of empty virions. Moreover, Canocapavir induces a conformational change of capsids, exposing the C-terminus of HBc linker region on the exterior.
Article
Computer Science, Artificial Intelligence
Ganlin Zhao, Pingfa Feng, Jianfu Zhang, Chang Yu, Jianjian Wang
Summary: This paper proposes a novel approach to detect and annotate assembly elements using AR mobile devices in an offline environment. The approach utilizes an improved deep learning object detection network and a spatial 3D annotation algorithm to achieve lightweight and accurate detection. Experimental results show that the proposed approach can assist operators in detecting key assembly elements with reasonable accuracy and significant advantages in operation speed.
EXPERT SYSTEMS WITH APPLICATIONS
(2023)
Article
Chemistry, Organic
Andreas Stein, Persefoni Hilken Nee Thomopoulou, Tim Schulte, Joerg Neudoerfl, Martin Breugst, Hans-Guenther Schmalz
Summary: Unexpected transformations of colchicine derivatives were discovered in this study, highlighting the unique reactivity of the tropolone ether unit. These insights into the reactivity of these compounds can be crucial for understanding their synthesis and activity.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Gastroenterology & Hepatology
Dieudonne Buh Kum, Hannah Vanrusselt, Abel Acosta Sanchez, Valerio Taverniti, Eloi R. Verrier, Thomas F. Baumert, Cheng Liu, Jerome Deval, Nikky Corthout, Sebastian Munck, Leonid Beigelman, Lawrence M. Blatt, Julian A. Symons, Pierre Raboisson, Andreas Jekle, Sandrine Vendeville, Yannick Debing
Summary: This study uncovers a novel mechanism of action for CAM-As in the treatment of chronic hepatitis B, where HBc aggregation induces cell death, leading to hepatocyte proliferation and loss of covalently closed circular DNA or its equivalent, possibly assisted by an induced innate immune response.
Article
Multidisciplinary Sciences
Qiang Wang, Zeyuan Guan, Liangbo Qi, Jinjin Zhuang, Chen Wang, Sixing Hong, Ling Yan, Yan Wu, Xiaoqian Cao, Jianbo Cao, Junjie Yan, Tingting Zou, Zhu Liu, Delin Zhang, Chuangye Yan, Ping Yin
Summary: Sam37 stabilizes mature Tom40 mainly through electrostatic interactions, facilitating subsequent TOM assembly. These results support the b barrel switching model and offer structural insights into the assembly and release of b barrel complexes.
Article
Chemistry, Multidisciplinary
Tingting Zheng, Qian Tang, Liqi Wan, Yumeng Zhao, Rui Xu, Xuemei Xu, Haowen Li, Da Han
Summary: In this work, a DNA-scaffolded mimicry of the catalytic cores of hydrolases is reported, showing controllable and hierarchical acceleration of the hydrolysis of fluorescein diacetate (FDA). The study demonstrates that the efficiency of hydrolysis is greatly increased by the proximity of catalytic amino acid residues induced by the DNA scaffold, with up to 4-fold improvement compared to free amino acids. Additionally, one-dimensional and two-dimensional assemblies of multiple catalytic cores further enhance the hydrolysis. This work highlights the potential of DNA-guided assembly as a promising platform for constructing enzyme mimics in a programmable and hierarchical manner.
Article
Chemistry, Multidisciplinary
Yanfang Hu, Yonglong Li, Linfeng Yu, Yuying Zhang, Yuming Lai, Wei Zhang, Wei Xie
Summary: A universal assembly methodology for preparing hetero-superstructures is introduced in this study, enabling the assembly of building block materials without the need for molecular linkers and utilizing surface property modulation to achieve self-organization. The resulting superstructures exhibit superior photocatalytic activity and Raman scattering performance.
Article
Chemistry, Multidisciplinary
Franz-Lucas Haut, Christoph Habiger, Lukas A. Wein, Klaus Wurst, Maren Podewitz, Thomas Magauer
Summary: A powerful method for the synthesis of tetrasubstituted furans has been developed, involving the regioselective ring-opening of 2,5-dihydrothiophenes followed by an oxidative cyclization. The potential for organic synthesis is highlighted by the total synthesis of bisabolene sesquiterpenoids using the obtained furans. Mechanistic experiments and computational studies revealed an unprecedented Pummerer-type rearrangement in the reaction process.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Ealeal Bear, Ariel Merlov, Yarden Arad, Noam Soker
Summary: This study investigates the impact of strong convection in low mass red giant branch stars during core helium flash, which excites waves to the envelope, causing envelope expansion and brightening. The energy deposited by these waves results in expansion by tens to hundreds solar radii in a few years, enhancing mass-loss rate and dust formation. The red transient event may lead to stars engulfing exoplanets and potentially allowing planets and brown dwarfs to survive during common envelope evolution.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Multidisciplinary Sciences
Xizi Chen, Yilun Qi, Zihan Wu, Xinxin Wang, Jiabei Li, Dan Zhao, Haifeng Hou, Yan Li, Zishuo Yu, Weida Liu, Mo Wang, Yulei Ren, Ze Li, Huirong Yang, Yanhui Xu
Summary: This study elucidates the assembly mechanism of human TFIID-based PIC, showing two tracks for modular reorganization and direct promoter deposition, converging at a holo PIC with around 50 subunits. TFIID stabilizes PIC organization and supports CAK-mediated phosphorylation of Pol II.
Article
Chemistry, Organic
Liubo Li, Anton El Khoury, Brennan O'Neil Clement, Carolyn Wu, Patrick G. Harran
Summary: In this study, polyhydroxylated chains reminiscent of lactonized deoxoKdn type sugars were synthesized through sequential organocatalytic additions. Functionalized chain precursors to portimine were assembled via further homologation and acylation reactions. This work provides advanced intermediates useful for exploring the biosynthesis and de novosynthesis of portimine.