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Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

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Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： Yi Qi Xueying Chen Bowen Liu Xuliang Lin Xueqing Qiu Yanlin Qin Guangdong Provincial Key laboratory of plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling

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plant peroxisomes:Small organelles with versatility and complexity

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Journal of Integrative plant Biology 2019年第7期61卷 782-783页

作者： Jianping Hu MSU-doe plant research laboratory and plant Biology Department Michigan State University

Peroxisomes are small,highly dynamic,and multifunctional organelles in *** to plant survival,peroxisomes house various crucial metabolic activities,such as degradation of hydrogen peroxide(H2O2),lipid metabolism,photorespiration,and hormone biosynthesis and catabolism,and remodel their proteome in response to developmental and environmental changes(Hu et al.2012;Pan and Hu 2018).The four reviews and three research articles in this special issue on plant peroxisomes provide new insights into the diverse roles and dynamics of these structurally simple but functionally complicated organelles,raising exciting new questions for future investigations.

关键词： plant peroxisomes Small organelles versatility complexity

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Differential Roles of Arabidopsis Dynamin-Related Proteins DRP3A,DRP3B,and DRP5B in Organelle Division

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Journal of Integrative plant Biology 2012年第11期54卷 921-931页

作者： Kyaw Aung MSU-doe plant research laboratory and plant Biology Department Michigan State UniversityEast LansingMI 48824USA

Dynaminrelated proteins （DRPs） are key components of the organelle division machineries, functioning as molecular scissors during the fission process. In Arabidopsis, DRP3A and DRP3B are shared by peroxisomal and mitochondrial division, whereas the structurallydistinct DRP5B （ARC5） protein is involved in the division of chloroplasts and peroxisomes. Here, we further investigated the roles of DRP3A, DRP3B, and DRP5B in organelle division and plant development. Despite DRP5B＇s lack of stable association with mitochondria, drp5B mutants show defects in mitochondrial division.

关键词： Arabidopsis dynamin-related protein mitochondria.

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Arabidopsis RING Peroxins are E3 Ubiquitin Ligases that Interact with Two Homologous Ubiquitin Receptor Proteins

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Journal of Integrative plant Biology 2013年第1期55卷 108-120页

作者： Navneet Kaur Qingzhen Zhao Qi Xie Jianping Hu MSU-doe plant research laboratory Michigan State University Institute of Genetics and Developmental Biology the Chinese Academy of Sciences

Peroxisomes are essential eukaryotic organelles that mediate various metabolic processes. Peroxisome import depends on a group of peroxisome biogenesis factors called peroxins, many of which are evolutionarily conserved. PEX2, PEX10, and PEX12 are three RING-finger-domain-containing integral membrane peroxins crucial for protein import. In yeast （Saccharomyces cerevisae）, RING peroxins act as E3 ligases, facilitating the recycling of the peroxisome import receptor protein PEX5 through ubiquitination. In plants, RING peroxins are essential to plant vitality. To elucidate the mode of action of the plant RING peroxins, we employed in vitro assays to show that the Arabidopsis RING peroxins also have E3 ligase activities. We also identified a PEX2-interacting protein, DSK2b, which is a member of the ubiquitin receptor family known to function as shuttle factors ferrying polyubiquitinated substrates to the proteasome for degradation. DSK2b and its tandem duplicate DSK2a are localized in the cytosol and the nucleus, and both interact with the RING domain of PEX2 and PEX12. DSK2 artificial microRNA lines did not display obvious defects in plant growth or peroxisomal processes, indicating functional redundancies among Arabidopsis ubiquitin receptor proteins. Our results suggest that Arabidopsis RING peroxins can function as E3 ligases and act together with the ubiquitin receptor protein DSK2 in the peroxisomal membrane-associated protein degradation system.

关键词： Arabidopsis RING domain proteins peroxisomes ubiquitin receptor.

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Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

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Science China Chemistry 2025年第01期 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong Di Man-Cheng Tang Ding-Kang Chen Ming-Ming Cao Yao-Wen Chang Hong-Yu Tang Chun-Mao Yuan Jun-Bo Yang Zhi-Li Zuo Han Guo Zi-Fei Xu Ying Zeng Yun-Dong Wu Xiao-Jiang Hao Key laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay laboratory State Key laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key laboratory of Functions and Applications of Medicinal plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences Yunnan Key laboratory for Wild plant Resources Kunming Institute of Botany Chinese Academy of Sciences research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

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Arabidopsis Forkhead-Associated Domain Protein 3 negatively regulates peroxisome division

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Journal of Integrative plant Biology 2017年第7期59卷 454-458页

作者： Mintu Desai Ronghui Pan Jianping Hu MSU-doe plant research laboratory Michigan State University Thermo Fisher Scientific plant Biology Department Michigan State University

Peroxisomes are ubiquitous and dynamic eukaryotic organelles capable of altering their abun- dance in response to environmental and developmental cues, yet the regulatory mechanism of plant peroxisome division/proliferation is unclear. To identify transcriptional regulators of the peroxisome division factor gene PEX 11b, we performed a nuclear pull-clown experiment and identified Arabidopsis Forkhead- Associated Domain Protein 3 （FHA3） as a novel protein that binds to the promoter of PEX 11b. Our data supported the conclusion that, in contrast to the previously identified HY5 HOMOLOG （HYH） protein that promotes the transcription of PEX 11b, FHA3 is a negative regulator of PEX 11b expression and peroxisome division.

关键词： FHA as that of gene Figure PEX Arabidopsis Forkhead-Associated Domain Protein 3 negatively regulates peroxisome division

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Maximizing biomass utilization: An integrated strategy for coproducing multiple chemicals

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Journal of Energy Chemistry 2025年第1期100卷 180-191页

作者： Byeongchan Ahn Sua Jo Jonggeol Na J.Jay Liu Young-Ju Kim Wangyun Won Department of Chemical and Biological Engineering Korea University Department of Chemical Engineering (Integrated process) Kyung Hee University Department of Chemical Engineering and Materials Science Ewha Womans University Department of Chemical Engineering Pukyong National University Resources Engineering plant research Department Korea Institute of Geoscience and Mineral Resources

Lignocellulosic biomass is one of the viable solutions to alleviate the global warming. However, the limited utilization of biomass majorly focused on cellulose and hemicellulose restricts the economic and environmental feasibilities. To cope with this issue, we proposed an integrated process of co-producing 1,6-hexanediol（1,6-HDO） with tetrahydrofuran and adipic acid from biomass, referred to as Strategy A. To compare the impacts of lignin upgrading and feedstock, Strategy B, which co-produces tetrahydrofuran alone, and Strategy C, which is the traditional route to produce 1,6-HDO from fossil fuels, were used. Heat networks are also designed to reduce operating costs and indirect carbon emissions due to energy consumption, saving 87% and 83% of the heat and cooling requirements, respectively, in Strategy A. The market competitiveness of Strategy A was evaluated by determining the minimum selling price through techno-economic analysis, and sustainability was thoroughly investigated by quantifying the environmental impacts through both midpoint and endpoint life-cycle assessments（LCAs）.Strategy A was found to be the most favorable both economically（USRDSCHARDOLLAR3,402/ton） and environmentally（-26.9 kg CO2eq.）. This indicates that lignin valorization is not only economically but also environmentally preferred. Finally, changes in economic and environmental feasibilities depending on economic, process, and environmental parameters were investigated using sensitivity and uncertainty analyses. The results of these analyses provide valuable insight into bio-based chemical production.

关键词： Biorefinery Carbon mitigation Climate change Global warming Lignin utilization Bioeconomy

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Effects of ultrasonic-assisted extraction on bioactive compounds,volatile flavors and antioxidant activities of vine tea water extracts

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Traditional Medicine research 2025年第1期10卷 73-81页

作者： Xiao-Long Zhou Wei-Jin Jiang Ji Yu Mao-Jun Yao Yun-Tong Li Hunan Provincial Key laboratory of research Resource Mining and High-valued Utilization on Edible&Medicinal PlantCollege of Chemistry and Chemical EngineeringJishou UniversityJishou 416000China Hunan Gaoge Dairy Co. Ltd.Changsha 410000China

Background:Ampelopsis grossedentata,vine tea,which is the tea alternative beverages in *** vine tea processing,a large amount of broken tea is produced,which has low commercial ***:This study investigates the influence of different extraction methods(room temperature water extraction,boiling water extraction,ultrasonic-assisted room temperature water extraction,and ultrasonic-assisted boiling water extraction,referred to as room temperature water extraction(RE),boiling water extraction(BE),ultrasonic assistance at room temperature water extraction(URE),and ultrasonic assistance in boiling water extraction(UBE))on the yield,dihydromyricetin(DMY)content,free amino acid composition,volatile aroma components,and antioxidant properties of vine tea ***:A notable influence of extraction temperature on the yield of vine tea extracts(P<0.05),with BE yielding the highest at 43.13±0.26%,higher than that of RE(34.29±0.81%).Ultrasound-assisted extraction significantly increased the DMY content of the extracts(P<0.05),whereas DMY content in the RE extracts was 59.94±1.70%,that of URE reached 66.14±2.78%.Analysis revealed 17 amino acids,with L-serine and aspartic acid being the most abundant in the extracts,nevertheless ultrasound-assisted extraction reduced total free amino acid *** chromatography-mass spectrometry analysis demonstrated an increase in the diversity and quantity of compounds in the vine tea water extracts obtained through ultrasonic-assisted ***,69 and 68 volatile compounds were found in URE and UBE extracts,which were higher than the number found in RE and BE *** vitro,antioxidant activity assessments revealed varying antioxidant capacities among different extraction methods,with RE exhibiting the highest DPPH scavenging rate,URE leading in ABTS•+free radical scavenging,and BE demonstrating superior ferric ion reducing antioxidant ***:The findings suggest that extraction methods signi

关键词： vine tea dihydromyricetin ultrasonic-assisted extraction volatile aroma components

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Next-generation research on transcriptional regulation of plant immunity

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Molecular plant 2024年第11期17卷 1651-1653页

作者： Akira Mine laboratory of plant Pathology Graduate School of AgricultureKyoto UniversityKyoto 606-8502Japan

plant health is fundamental for agricultural production to feed the growing global population as well as for primary production to sustain ecosystem *** innate immune system of plants is integral to their health;it is activated upon recognition of pathogen invasion by immune receptors,leading to pathogen resistance through genome-wide transcriptional *** defense-associated transcriptome reprogramming is mediated by various immune signals,including the phytohormone salicylic acid(SA).SA plays a pivotal role in activating pathogen resistance both locally in infected tissues and systemically in uninfected *** Arabidopsis thaliana,SA is perceived by its receptors NONEXPRESSOR OF PATHOGENESIS-RELATED GENES 1(NPR1),NPR3,and *** NPR3 and NPR4 function as negative regulators of SA signaling,NPR1 serves as a key positive regulator of SA-mediated transcriptomic changes and pathogen resistance(Ding et al.,2018).Consistent with its lack of a DNA-binding domain,NPR1 has been shown to act as a transcription cofactor for multiple transcription factors(TFs)such as TGAs and WRKYs(Wang et al.,2006;Kumar et al.,2022).Besides TFs,other components of the transcriptional machinery are likely to participate in NPR1-regulated transcriptional responses,as NPR1 forms nuclear condensates upon SA induction(Zavaliev et al.,2020).Despite decades of research on NPR1’s functions in plant immunity,a comprehensive understanding of how NPR1 cooperates with multiple TFs and other components of the transcriptional machinery to initiate and propagate transcriptional responses to SA is still lacking.

关键词： transcriptional plant immunity

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plant biotic interactions: From fundamental research toward sustainable agriculture

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Journal of Integrative plant Biology 2021年第2期63卷 275-276页

作者： Rosa Lozano-Duran Suomeng Dong Shanghai Center for plant Stress Biology CAS Center for Excellence in Molecular Plant Sciencesthe Chinese Academy of SciencesShanghai 201602China Department of plant Biochemistry Centre for Plant Molecular Biology(ZMBP)Eberhard Karls UniversityD-72076 TubingenGermany The Key laboratory of plant Immunity and Department of plant Pathology Nanjing Agricultural UniversityNanjing 210095China

plants not only provide food and natural materials for humankind, but also constitute an indispensable part of the ecological system of this planet:without plants, life as we know it would simply not be possible. Through their lifespans,plants interact with a plethora of other organisms, including beneficial microbes and potential pathogens. Dissecting the underlying mechanisms determining the outcome of plant biotic interactions is a cornerstone for the design of rational management strategies to secure global food production and ecological balance.

关键词： corners planet rational

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