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Engineering Shewanella-re duce d graphene oxide aerogel biohybrid to efficiently synthesize Au nanoparticles

Journal of Materials Science & Technology 2024年第1期168卷 50-61页

作者： baocai zhang Shulin Shao Huan Yu Qijing Liu Sicheng Shi Qingyuan Wu Zijie Wu Yiyu Feng Yifei Wang Xi Sun Deguang Wu Feng Li Hao Song Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China School of Materials Science and Engineering Tianjin UniversityTianjin 300350China College of Biological Engineering Tianjin Agricultural UniversityTianjin 300384China Department of Brewing Engineering Moutai InstituteLuban AveRenhuai 564507China

Biosynthesizing Au nanoparticles(AuNPs)from gold-bearing scraps provides a sustainable method to meet the urgent demand for ***,it remains challenging to efficiently biosynthesize AuNPs of which the diameter is less than 10 nm from a trace amount of Au^(3+)concentration at the level of tens ***,we constructed an exoelectrogenic cell(eCell)-conductive reduced-graphene-oxide aero-gel(rGA)biohybrid by assembling Shewanella sp.S1(SS1)as living biocatalyst and rGA as conductive ad-sorbent,in which Au^(3+)at trace concentrations would be enriched by the adsorption of rGA and reduced to AuNPs through the extracellular electron transfer(EET)of *** regulate the size of the synthe-sized AuNPs to 10 nm,the strain SS1 was engineered to enhance its EET,resulting in strain RS2(pYYD-P tac-ribADEHC&pHG13-P_(bad)-omcC in SS1).Strain RS2 was further assembled with rGA to construct the RS2-rGA biohybrid,which could synthesize AuNPs with the size of 7.62±2.82 nm from 60 ppm Au^(3+)*** eCell-rGA biohybrid integrated Au^(3+)adsorption and reduction,which enabled AuNPs biosyn-thesis from a trace amount of Au^(3+).Thus,the required Au^(3+)ions concentration was reduced by one or two orders of magnitude compared with conventional methods of AuNPs *** work devel-oped an AuNPs size regulation technology via engineering eCell’s EET with synthetic biology methods,providing a feasible approach to synthesize AuNPs with controllable size from trace level of gold ions.

关键词： Au nanoparticles Exoelectrogenic cell(e-Cell) Shewanella Synthesis biology Extracellular electron transfer Reduced graphene oxide aerogel

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Rice Brittleness Mutants: A Way to Open the ‘Black Box’ of Monocot Cell Wall Biosynthesis

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Journal of Integrative Plant Biology 2011年第2期53卷 136-142页

作者： baocai zhang Yihua Zhou State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental Biologythe Chinese Academy of Sciences Beijing 100101 China

Rice is a model organism for studying the mechanism of cell wall biosynthesis and remolding in Gramineae. Mechanical strength is an important agronomy trait of rice （Oryza sativa L.） plants that affects crop lodging and grain yield. As a prominent physical property of cell walls, mechanical strength reflects upon the structure of different wall polymers and how they interact. Studies on the mechanisms that regulate the mechanical strength therefore consequently results in uncovering the genes functioning in cell wall biosynthesis and remodeling. Our group focuses on the study of isolation of brittle culm （bc） mutants and characterization of their corresponding genes. To date, several bc mutants have been reported. The identified genes have covered several pathways of cell wall biosynthesis, revealing many secrets of monocot cell wall biosynthesis. Here, we review the progress achieved in this research field and also highlight the perspectives in expectancy. All of those lend new insights into mechanisms of cell wall formation and are helpful for harnessing the waste rice straws for biofuel production.

关键词： RICE BRITTLENESS MONOCOTYLEDONS PLANT cell walls BIOSYNTHESIS ENERGY crops CELLULOSE

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The plant cell wall: Biosynthesis, construction, and functions

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Journal of Integrative Plant Biology 2021年第1期63卷 251-272页

作者： baocai zhang Yihong Gao Lanjun zhang Yihua Zhou State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed DesignChinese Academy of SciencesBeiing 100101China University of Chinese Academy of Sciences Bejig 100049China

The plant cell wall is composed of multiple biopolymers, representing one of the most complex structural networks in nature. Hundreds of genes are involved in building such a natural masterpiece. However, the plant cell wall is the least understood cellular structure in plants. Due to great progress in plant functional genomics,manyachievementshavebeenmadein uncovering cell wall biosynthesis, assembly, and architecture, as well as cell wall regulation and signaling. Such information has significantly advanced our understanding of the roles of the cell wall in many biological and physiological processes and has enhanced our utilization of cell wall materials. The use of cutting-edge technologies such as single-molecule imaging,nuclear magnetic resonance spectroscopy, and atomic force microscopy has provided much insight into the plant cell wall as an intricate nanoscale network, opening up unprecedented possibilities for cell wall research. In this review,we summarize the major advances made in understanding the cell wall in this era of functional genomics, including the latest findings on the biosynthesis, construction, and functions of the cell wall.

关键词： biosynthesis cell wall construction function

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Woody plant cell walls:Fundamentals and utilization

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Molecular Plant 2024年第1期17卷 112-140页

作者： Wei Li Ying-Chung Jimmy Lin Ying-Lan Chen Chenguang Zhou Shuang Li Nette De Ridder Dyoni M.Oliveira Lanjun zhange baocai zhang Jack P.Wang Changzheng Xu Xiaokang Fu Keming Luo Ai-Min Wu Taku Demura Meng-Zhu Lu Yihua Zhou Laigeng Li Toshiaki Umezawa Wout Boerjan Vincent L.Chiang State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040China Department of Life Science National Taiwan UniversityTaipeiTaiwanChina Department of Biotechnology and Bioindustry Sciences College of Bioscience and BiotechnologyNational Cheng Kung UniversityTainanTaiwanChina Department of Plant Biotechnology and Bioinformatics Ghent UniversityTechnologiepark 719052 GhentBelgium VIB Center for Plant Systems Biology Technologiepark 719052 GhentBelgium State Key Laboratory of Plant Genomics Insttute of Genetics and Developmental Biology Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Forest Biotechnology Group Department of Forestry and Environmental ResourcesNorth Carolina State UniversityRaleighNC 27695USA Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation Integrative Science Center of Germplasm CreationSchool of Life SciencesSouthwest UniversityChongqing 400715China Guangdong Key Laboratory for Innovative Developmentand Utilization of Forest Plant Germplasm College of Forestry and Landscape ArchitecturesSouth China Agricultural UniversityGuangzhou510642China Center for Digital Green-innovation Nara Institute of Science and TechnologykomaNara 630-0192Japan State Key Laboratory of Subtropical Siviculture College of Forestry and BiotechnologyZhejang A&F UniversityHangzhou 311300China CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences300 Fenglin RoadShanghai 200032China Laboratoryof MetabolicScienceofForest Plants and Microorganisms Rsearch Institute for Sustainable HumanosphereKyoto UniversityUjiKyoto 611-0011 Japan

Cell walls in plants,particularly forest trees,are the major carbon sink of the terrestrial *** and biosynthetic features of plant cell walls were revealed early on,focusing mostly on herbaceous model *** developments in genomics,transcriptomics,epigenomics,transgenesis,and associated analytical techniques are enabling novel insights into formation of woody cell ***,we review multilevel regulation of cell wall biosynthesis in forest tree *** highlight current approaches to engineering cell walls as potential feedstock for materials and energy and survey reported field tests of such engineered transgenic *** outline opportunities and challenges in future research to better understand cell type biogenesis for more efficient wood cell wall modification and utilization for biomaterials or for enhanced carbon capture and storage.

关键词： regulation of cell wall formation biosynthesis of cell wall components lignin cellulose hemicellulose cell wall utilization

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THE　NEW　INTEGRABLE　SYSTEM　OF　THE　COMPLEX　FORM　AND　THE　COUPLED　MKDV　HIERARCHY

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Applied Mathematics(A Journal of Chinese Universities) 1997年第1期12卷 63-68页

作者： CHEN QINGHUI AND zhang baocai

In this paper, the new coupled MKdV hierarchy and their Lax pairs are obtained. Through introducing a suitable complex form of symplectic structure , a new integrable system of the complex form in the Liouville sense is generated. Moreover, the representations of the solution for the coupled MKdV hierarchy are given by the involutive solutions of the commutable flow .

关键词： FORM COUPLED OF SYSTEM MKDV AND COMPLEX

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Systematic Full-Cycle Engineering Microbial Biofilms to Boost Electricity Production in Shewanella oneidensis

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Research 2023年第2期2023卷 361-378页

作者： Feng Li Rui Tang baocai zhang Chunxiao Qiao Huan Yu Qijing Liu Junqi zhang Liang Shi Hao Song Frontiers Science Center for Synthetic Biology(Ministry of Education) and Key Laboratory of Systems BioengineeringTianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Department of Biological Sciences and Technology School of Environmental StudiesChina University of Geoscience in WuhanWuhanHubei 430074China

Electroactive biofilm plays a crucial rule in the electron transfer efficiency of microbial electrochemical systems(MES).However,the low ability to form biofilm and the low conductivity of the formed biofilm substanti... 详细信息

关键词： limit conductivity transfer

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Engineering Shewanella carassii, a newly isolated exoelectrogen from activated sludge, to enhance methyl orange degradation and bioelectricity harvest

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Synthetic and Systems Biotechnology 2022年第3期7卷 918-927页

作者： Chi Yang Junqi zhang baocai zhang Dingyuan Liu Jichao Jia Feng Li Hao Song Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjin300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) School of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China Qingdao Institute Ocean Engineering of Tianjin University Tianjin UniversityQingdao266200China

Electroactive microorganisms(EAMs)play important roles in biogeochemical redox processes and have been of great interest in the fields of energy recovery,waste treatment,and environmental ***,the currently identified EAMs are difficult to be widely used in complex and diverse environments,due to the existence of poor electron transfer capability,weak environmental adaptability,and difficulty with engineering modifications,***,rapid and efficient screening of high performance EAMs from environments is an effective strategy to facilitate applications of microbial fuel cells(MFCs).In this study,to achieve efficient degradation of methyl orange(MO)by MFC and electricity harvest,a more efficient exoelectrogen Shewanella carassii-D5 that belongs to Shewanella *** first isolated from activated sludge by WO_(3) nanocluster probe *** properties experiments confirmed that ***-D5 is a Gram-negative strain with rounded colonies and smooth,slightly reddish surface,which could survive in media containing lactate at 30℃.Moreover,we found that ***-D5 exhibited remarkable MO degradation ability,which could degrade 66%of MO within 72 h,1.7 times higher than that of Shewanella oneidensis *** measurements showed that MFCs inoculated with ***-D5 could generate a maximum power density of 704.6 mW/m^(2),which was 5.6 times higher than that of *** *** investigation of the extracellular electron transfer(EET)mechanism found that ***-D5 strain had high level of c-type cytochromes and strong biofilm formation ability compared with *** MR-1,thus facilitating direct ***,to enhance indirect electron transfer and MO degradation capacity,a synthetic gene cluster ribADEHC encoding riboflavin synthesis pathway from Bacillus subtilis was heterologously expressed in ***-D5,increasing riboflavin yield from 1.9 to 9.0 mg/g DCW with 1286.3 mW/m^(2) power density outpu

关键词： Microbial fuel cells WO_(3)nanocluster probe Shewanella carassii Riboflavin Methyl orange

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An Uncanonical CCCH-Tandem Zinc-Finger Protein Represses Secondary Wall Synthesis and Controls Mechanical Strength in Rice

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Molecular Plant 2018年第1期11卷 163-174页

作者： Dongmei zhang Zuopeng Xu Shaoxue Cao Kunling Chen Shance Li Xiangling Liu Caixia Gao baocai zhang Yihua Zhou State Key Laboratory of Plant Genomics Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing China University of Chinese Academy of Sciences Beijing 100049 China

Secondary walls, which represent the bulk of biomass, have a large impact on plant growth and adaptation to environments. Secondary wall synthesis is switched and regulated by a sophisticated signaling transduction network. However, there is limited understanding of these regulatory pathways. Here, we report that ILAl-interacting protein 4 （lIP4） can repress secondary wall synthesis, lIP4 is a phosphorylation sub- strate of an Raf-like MAPKKK, but its function is unknown. By generating lip4 mutants and relevant transgenic plants, we found that lesions in lIP4 enhance secondary wall formation. Gene expression and transactivation activity assays revealed that lIP4 negatively regulates the expression of MYB61 and CESAs but does not bind their promoters, lIP4 interacts with NAC29/NAC31, the upstream regulators of secondary wall synthesis, and suppresses the downstream regulatory pathways in plants. Mutagenesis analyses showed that phosphomimic UP4 proteins translocate from the nucleus to the cytoplasm, which releases interacting NACs and attenuates its repression function. Moreover, we revealed that liPs are evolutionarily conserved and share unreported CCCH motifs, referred to as uncanonical CCCH-tandem zinc-finger proteins. Collectively, our study provides mechanistic insights into the control of secondary wall synthesis and presents an opportunity for improving relevant agronomic traits in crops.

关键词： secondary wall synthesis regulatory pathway repressor zinc finger rice

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Rab-H_1b is essential for trafficking of cellulose synthase and for hypocotyl growth in Arabidopsis thaliana

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Journal of Integrative Plant Biology 2018年第11期60卷 1051-1069页

作者： Ming He Miao Lan baocai zhang Yihua Zhou Youqun Wang Lei Zhu Ming Yuan Ying Fu State Key Laboratory of Plant Physiology and Biochemistry College of Biological Sciences China Agricultural University State Key Laboratory of Plant Genomics and National Plant Gene Research Center Institute of Genetics and Developmental Biologythe Chinese Academy of Sciences

Ceil-wall deposition of cellulose microfibrils is essential for plant growth and development. In plant cells, cellulose synthesis is accomplished by cellulose synthase complexes located in the plasma membrane. Trafficking of the complex between endomembrane compartments and the plasma membrane is vital for cellulose biosynthesis; however, the mechanism for this process is not well understood. We here report that, in Arabidopsis thaliana, Rab-H1b, a Golgi-localized small GTPase, participates in the trafficking of CELLULOSE SYNTHASE 6 （CESA6） to the plasma membrane. Loss of Rab-Hlb function resulted in altered distribution and motility of CESA6 in the plasma membrane and reduced cellulose content. Seedlings with this defect exhibited short, fragile etiolated *** of CESA6 was impaired in rab-Mb cells, and endocytosis in mutant cells was significantly reduced as well. We further observed accumulation of vesicles around an abnormal Golgi apparatus having an increased number of cisternae in rab-Mb cells, suggesting a defect in cisternal homeostasis caused by Rab-Hlb loss function. Our findings link Rab GTPases to cellulose biosynthesis, during hypo- cotyl growth, and suggest Rab-Hlb is crucial for modulating the trafficking of cellulose synthase complexes between endomembrane compartments and the plasma membrane and for maintaining Golgi organization and morphology.

关键词： Rab-H1b is essential for trafficking of cellulose synthase and for hypocotyl growth in Arabidopsis thaliana

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The RLCK-VND6 module coordinates secondary cell wall formation and adaptive growth in rice

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Molecular Plant 2023年第6期16卷 999-1015页

作者： Shaoxue Cao Yan Wang Yihong Gao Rui Xu Jianing Ma Zuopeng Xu Keke Shang-Guan baocai zhang Yihua Zhou State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed DesignChinese Academy of SciencesBeijing100101China University of Chinese Academy of Sciences Beijing 100049China jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics College of AgricultureYangzhouUniversityYangzhou225009China

The orderly deposition of secondary cell wall(SCW)in plants is implicated in various biological programs and is precisely *** many positive and negative regulators of SCW have been documented,the molecular mechanisms underlying SCW formation coordinated with distinct cellular physiological processes during plant adaptive growth remain largely ***,we report the identification of Cellulose Synthase co-expressed Kinase1(CSK1),which encodes a receptor-like cytoplasmic kinase,as a negative regulator of SCW formation and its signaling cascade in *** deep sequencing of developing internodes and genome-wide co-expression assays revealed that CSK1 is co-expressed with cellulose synthase genes and is responsive to various stress *** increased SCW thickness and vigorous vessel transport in csk1 indicate that CSK1 functions as a negative regulator of SCW *** observation of green fluorescent protein-tagged CSK1 in rice protoplasts and stable transgenic plants,we found that CSK1 is localized in the nucleus and cytoplasm adjacent to the plasma *** and molecular assays demonstrated that CSK1 phosphorylates VASCULAR-RELATED NAC-DOMAIN 6(VND6),a master SCW-associated transcription factor,in the nucleus,which reduces the transcription of a suite of SCW-related genes,thereby attenuating SCW ***,genetic analyses show that CSK1 functions upstream of VND6 in regulating SCW ***,our physiological analyses revealed that CSK1 and VND6 are involved in abscisic acid-mediated regulation of cell growth and SCW *** together,these results indicate that the CSK1-VND6 module is an important component of the SCW biosynthesis machinery,which coordinates SCW accumulation and adaptive growth in *** study not only identifies a new regulator of SCW biosynthesis but also reveals a fine-tuned mechanism for precise control of SCW deposition,offering tools for rationally

关键词： RLCK signaling kinase fine-tuning regulator secondary cell wall biosynthesis mechanical force ABA adaptation

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