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6-Phosphogluconate dehydrogenase 2 bridges the OPP and shikimate pathways to enhance aromatic amino acid production in plants

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Science China Life Sciences 2024年

作者： Qian Tang Yuxin Huang Zhuanglin Shen Linhui Sun Yang Gu Huiqing He Yanhong Chen Jiahai Zhou Limin Zhang Cuihuan Zhao Shisong Ma Yunhai Li Jie Wu Qiao Zhao Shenzhen Key Laboratory of Synthetic Genomics Guangdong Provincial Key Laboratory of Synthetic Genomics Key Laboratory of Quantitative Synthetic Biology Shenzhen Institute of Synthetic BiologyShenzhen Institute of Advanced Technology Chinese Academy of Sciences University of Chinese Academy of Sciences CAS Key Laboratory for Quantitative Engineering biology Shenzhen Institute of Synthetic Biology Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Key Laboratory of Quantitative Synthetic biology Shenzhen Institute of Synthetic Biology Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Key Laboratory of Agricultural Microbiology of Heilongjiang Province Northeast Agricultural University Center for Plant biology School of Life Sciences Tsinghua University State Key Laboratory of Plant cell and Chromosome Engineering CAS Centre for Excellence in Molecular Plant Biology Institute of Genetics and Developmental Biology The Innovative Academy of Seed Design Chinese Academy of Sciences MOE Key Laboratory for Membraneless Organelles and cellular Dynamics School of Life Sciences University of Science and Technology of China Innovation Academy for Seed Design Chinese Academy of Sciences

The oxidative pentose phosphate(OPP) pathway provides metabolic intermediates for the shikimate pathway and directs carbon flow to the biosynthesis of aromatic amino acids(AAAs), which serve as basic protein building blocks and precursors of numerous metabolites essential for plant growth. However, genetic evidence linking the two pathways is largely unclear. In this study, we identified 6-phosphogluconate dehydrogenase 2(PGD2), the rate-limiting enzyme of the cytosolic OPP pathway, through suppressor screening of arogenate dehydrogenase 2(adh2) in Arabidopsis. Our data indicated that a single amino acid substitution at position 63(glutamic acid to lysine) of PGD2 enhanced its enzyme activity by facilitating the dissociation of products from the active site of PGD2, thus increasing the accumulation of AAAs and partially restoring the defective phenotype of adh2. Phylogenetic analysis indicated that the point mutation occurred in a well-conserved amino acid residue. Plants with different amino acids at this conserved site of PGDs confer diverse catalytic activities, thus exhibiting distinct AAAs producing capability. These findings uncover the genetic link between the OPP pathway and AAAs biosynthesis through PGD2. The gain-of-function point mutation of PGD2 identified here could be considered as a potential engineering target to alter the metabolic flux for the production of AAAs and downstream compounds.

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Stay in touch with the endoplasmic reticulum

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Science China(Life Sciences) 2024年第2期67卷 230-257页

作者： Sha Sun Gan Zhao Mingkang Jia Qing Jiang Shulin Li Haibin Wang Wenjing Li Yunyun Wang Xin Bian Yan G.Zhao Xun Huang Ge Yang Huaqing Cai Jose C.Pastor-Pareja Liang Ge Chuanmao Zhang Junjie Hu National Laboratory of Biomacromolecules Institute of BiophysicsUniversity of Chinese Academy of SciencesChinese Academy of SciencesBeijing 100101China The Ministry of Education Key Laboratory of cell Proliferation and Differentiation College of Life SciencesPeking UniversityBeijing 100871China State Key Laboratory of Membrane biology Tsinghua-Peking Center for Life SciencesSchool of Life SciencesTsinghua UniversityBeijing 100084China Laboratory of Computational biology&Machine Intelligence School of Artificial IntelligenceUniversity of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Medicinal Chemical biology College of Life SciencesNankai UniversityTianjin 300071China Brain Research Center Department of BiologySchool of Life SciencesSouthern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Molecular Developmental biology Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing 100101China institute of Neurosciences Consejo Superior de Investigaciones Científicas-Universidad Miguel HernándezSan Juan de Alicante 03550Spain

The endoplasmic reticulum(ER),which is composed of a continuous network of tubules and sheets,forms the most widely distributed membrane system in eukaryotic *** a result,it engages a variety of organelles by establishing membrane contact sites(MCSs).These contacts regulate organelle positioning and remodeling,including fusion and fission,facilitate precise lipid exchange,and couple vital signaling ***,we systematically review recent advances and converging themes on ER-involved organellar *** molecular basis,cellular influence,and potential physiological functions for ER/nuclear envelope contacts with mitochondria,Golgi,endosomes,lysosomes,lipid droplets,autophagosomes,and plasma membrane are summarized.

关键词： endoplasmic reticulum nuclear envelope mitochondria Golgi apparatus endosome lysosome lipid droplets autophagosome plasma membrane membrane contact site

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An efficient and safe strategy for germ cell-specific automatic excision of foreign DNA in F1 hybrid transgenic silkworms

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Insect Science 2024年第1期31卷 28-46页

作者： Dingpei Long Rongpeng Liu Yang Huang Anyao Fu Yuli Zhang Zhanzhang Hao Qiang Li Hanfu Xu Zhonghuai Xiang Aichun Zhao State Key Laboratory of Resource Insects Institute of Sericulture and Systems BiologySouthwest UniversityChongqingChina Department of biology Georgia State UniversityAtlantaGeorgiaUSA Guangxi institute of Sericulture Science NanningGuangxiChina Department of Mathematics and Statistics Georgia State UniversityAtlantaGeorgiaUSA

The safety of transgenic technology is a major obstacle in the popularization and use of transgenic silkworms and their *** sericulture,only the first filial generation(F1)hybrid eggs produced by cross-breeding Japanese and Chinese original strains are usually used for the large-scale breeding of silkworms,but this may result in uncontrolled transgene dispersal during the popularization and application of the F1 hybrid transgenic *** address this issue,we developed a safe and efficient strategy using the GAL4/Upstream activating sequence(UAS)system,the FLP/flippase recognition target(FRT)system,and the gonad-specific expression gene promoters(RSHP1p and Nanosp)for the germ cell-specific automatic excision of foreign DNA in the F1 hybrid transgenic *** established 2 types of activator strains,R1p::GAL4-Gr and Nsp::GAL4-Gr,containing the testis-specific GAL4 gene expression cassettes driven by RSHP1p or Nanosp,respectively,and 1 type of effector strain,UAS::FLP-Rg,containing the UAS-linked FLP gene expression *** FLP recombinase-mediated sperm-specific complete excision of FRT-flanked target DNA in the F1 double-transgenic silkworms resulting from the hybridization of R1p::GAL4-Gr and UAS::FLP-Rg was 100%,whereas the complete excision efficiency resulting from the hybridization of Nsp::GAL4-Gr and UAS::FLP-Rg ranged from 13.73%to 80.3%.Additionally,we identified a gene,sw11114,that is expressed in both testis and ovary of Bombyx mori,and can be used to establish novel gonad-specific expression systems in transgenic *** strategy has the potential to fundamentally solve the safety issue in the production of F1 transgenic silkworm eggs and provides an important reference for the safety of transgenic technology in other insect species.

关键词： Bombyx mori FLP/FRT system GAL4/UAS system germ cell-specific excision safety of transgenic technology transgenic silkworm

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A repertoire of intronic lariat RNAs reveals tissue-specific regulation and target mimicry potential in plants

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Science China(Life Sciences) 2024年第6期67卷 1280-1291页

作者： Yong Zhang Xiaotuo Zhang Qi Tang Lei Li Ting Jiang Yixiao Fang Hong Zhang Jixian Zhai Guodong Ren Binglian Zheng State Key Laboratory of Genetic Engineering Institute of Plant BiologySchool of Life SciencesFudan UniversityShanghai 200438China Department of biology School of Life SciencesSouthern University of Science and TechnologyShenzhen 518055China

Lariat RNA is concomitantly produced by excised intron during RNA splicing,which is usually debranched by DBR1,an RNA debranching ***,increasing evidence showed that some lariat RNA could escape *** is known about how and why these lariat RNAs could be *** comparing the atlas of lariat RNAs between the non-dividing cell(mature pollen)and three actively dividing tissues(young shoot apex,young seeds,and young roots),we identified hundreds to thousands of lariat RNA naturally retained in each tissue,and the incidence of lariat RNA retention is much less in shoot apex while much more in *** lariat RNAs derived from the same intron or different lariat RNAs from the same pre-m RNA could be retained in one tissue while degraded in the other *** deciphering lariat RNA sequences,we identified an AG-rich(RAAAAVAAAR)motif and a UC-rich(UCUCUYUCUC)motif for pollen-specific and the other three tissues-retained lariat RNAs,*** of the pollen-specific AG-rich motif indeed enhanced lariat RNA retention in ***,hundreds of lariat RNAs harbored mi RNA binding sites,and dual-luciferase reporter assay showed that these natural lariat RNAs had the potential to protect expression of mi RNA target ***,our results uncover that selective retention of lariat RNA is an actively regulatory process,and provide new insights into understanding how lariat RNA metabolism may impact mi RNA activity.

关键词： intron turnover lariat RNA miRNA RNA splicing DBR1

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A single-nucleus transcriptomic atlas of primate liver aging uncovers the pro-senescence role of SREBP2 in hepatocytes

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Protein & cell 2024年第2期15卷 98-120页

作者： Shanshan Yang Chengyu Liu Mengmeng Jiang Xiaoqian Liu Lingling Geng Yiyuan Zhang Shuhui Sun Kang Wang jian Yin Shuai Ma Si Wang Juan Carlos Izpisua Belmonte Weiqi Zhang Jing Qu Guang-Hui Liu Advanced Innovation Center for Human Brain Protection and National Clinical Research Center for Geriatric Disorders Xuanwu Hospital Capital Medical UniversityBeijing 100053China State Key Laboratory of Membrane biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Aging Translational Medicine Center International Center for Aging and CancerBeijing Municipal Geriatric Medical Research CenterXuanwu HospitalCapital Medical UniversityBeijing 100053China State Key Laboratory of Stem cell and Reproductive biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijing 100101China Xuanwu Hospital Capital Medical University Beijing 100053China University of Chinese Academy of Sciences Beijing 100049China institute for Stem cell and Regeneration Chinese Academy of SciencesBeijing 100101China Beijing institute for Stem cell and Regenerative Medicine Beijing 100101China Aging Biomarker Consortium Beijing 100101China Altos Labs Inc.San DiegoCA 94022USA

Aging increases the risk ofliver diseases and systemic susceptibility to aging-related ***,cell type-specific changes and the underlying mechanism of liver aging in higher vertebrates remain incompletely ***,we constructed the first single-nucleus transcriptomic landscape of primate liver aging,in which we resolved cell type-specific gene expression fluctuation in hepatocytes across three liver zonations and detected aberrant cell-cell interactions between hepatocytes and niche *** in-depth dissection of this rich dataset,we identifed impaired lipid metabolism and upregulation of chronic inflammation-related genes prominently associated with declined liver functions during *** particular,hyperactivated sterol regulatory element-binding protein(SREBP)signaling was a hallmark of the aged liver,and consequently,forced activation of SREBP2 in human primary hepatocytes recapitulated in vivo aging phenotypes,manifesting as impaired detoxification and accelerated cellular *** study expands our knowledge of primate liver aging and informs the development of diagnostics and therapeutic interventions for liver aging and associated diseases.

关键词： single-nucleus RNA sequencing liver hepatocytes aging senescence SREBP2

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Application of Polygonum minus Extract in Enhancing Drought Tolerance in Maize by Regulating Osmotic and Antioxidant System

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Phyton-International Journal of Experimental Botany 2024年第2期93卷 213-226页

作者： Mingzhao Han Susilawati Kasim Zhongming Yang Xi Deng Md Kamal Uddin Noor Baity Saidi Effyanti Mohd Shuib Department of Land Management Faculty of AgricultureUniversiti Putra MalaysiaSerdang43400Malaysia Natural Medicines and Products Research Laboratory Institute of BioscienceUniversiti Putra MalaysiaSerdang43400Malaysia Department of cell and Molecular biology Faculty of Biotechnology and Biomolecular SciencesUniversiti Putra MalaysiaSerdang43400Malaysia

Drought stress is a major factor affecting plant growth and crop yield *** extracts as natural biostimulants hold great potential to strengthen plants to overcome drought *** explore the effect of Polygonum minus extract(PME)in enhancing drought tolerance in plants,a study was set up in a glasshouse environment using 10 different treatment *** foliar application were designed in CRD and effects were closely observed related to the growth,physiology,and antioxidant system changes in maize(Zea mays L.)under well-watered and drought *** seaweed extract(SWE)was used as a *** subjected to drought stress exhibited a significant reduction in fresh weight,dry weight,relative water content(RWC),and soluble sugar,but they stimulated the phenolic,flavonoid,proline,glutathione(GSH),malondialdehyde(MDA)and antioxidant enzyme(catalase,CAT;peroxidase,POD;superoxide dismutase,SOD)*** application of PME improved fresh and dry weight(FW:33.1%~41.4%;DW:48.0%~43.1%),chlorophyll content(Chl b:87.9%~100.76%),soluble sugar(23.6%~49.3%),and soluble protein(48.6%~56.9%)as well as antioxidant enzyme activities(CAT and POD)compared to CK under drought *** decreasing the level of ***,the mitigating effect of PME application with high concentration was more effective than those of *** study reveals that PME could alleviate drought stress by regulating osmoprotectant content and antioxidant defense system and can be used as an economical and environmentally friendly biostimulants for promoting maize growth under drought stress.

关键词： Drought biostimulants photosynthesis osmoprotectants antioxidants maize

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Identifying genetic susceptibility to Aspergillus fumigatus infection using collaborative cross mice and RNA-Seq approach

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Animal Models and Experimental Medicine 2024年第1期7卷 36-47页

作者： Roa'a H.S.Yosief Iqbal M.Lone Aharon Nachshon Heinz Himmelbauer Irit Gat-Viks Fuad A.Iraqi Department of Clinical Microbiology and Immunology Sackler Faculty of MedicineTel-Aviv UniversityTel-AvivIsrael School of Molecular cell biology and Biotechnology George S.Wise Faculty of Life SciencesTel Aviv UniversityTel AvivIsrael institute of Computational biology Department of BiotechnologyUniversity of Natural Resources and Life SciencesMuthgasse 181190 ViennaAustria

Background:Aspergillus fumigatus(Af)is one of the most ubiquitous fungi and its infection potency is suggested to be strongly controlled by the host genetic *** aim of this study was to search for candidate genes associated with host susceptibility to Aspergillus fumigatus(Af)using an RNAseq approach in CC lines and hepatic gene ***:We studied 31 male mice from 25 CC lines at 8 weeks old;the mice were infected with *** tissues were extracted from these mice 5 days post-infection,and next-generation RNA-sequencing(RNAseq)was *** GENE-E analysis platform was used to generate a clustered heat map ***:Significant variation in body weight changes between CC lines was *** gene expression revealed 12 top prioritized candidate genes differ-entially expressed in resistant versus susceptible mice based on body weight ***,three candidate genes are located within genomic intervals of the previ-ously mapped quantitative trait loci(QTL),including Gm16270 and Stox1 on chromo-some 10 and Gm11033 on chromosome ***:Our findings emphasize the CC mouse model's power in fine mapping the genetic components underlying susceptibility towards *** a next step,eQTL analysis will be performed for our RNA-Seq *** candidate genes from our study will be further assessed with a human cohort with aspergillosis.

关键词： aspergillus fumigatus infection collaborative cross(CC)mice gene expression profile gene-network host susceptibility quantitative trait loci(QTL)mapping RNA-Seq

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Unveiling the anticancer effect of traditional Chinese herbal medicine

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World Journal of Gastroenterology 2024年第30期30卷 3625-3627页

作者： Naoki Asano Division of Carcinogenesis and Senescence biology Tohoku University Graduate School of MedicineNatori 981-1293MiyagiJapan Division of Cancer Stem cell Miyagi Cancer Center Research InstituteNatori 981-1293MiyagiJapan

In this issue of World Journal of Gastroenterology,Huang et al reported that Calculus bovis(CB),a traditional Chinese herbal medicine,impedes the growth of liver cancers in *** further in vitro studies,they showed that CB suppressed the M2 polarization of tumor-associated macrophages by suppressing the Wnt signaling pathway,which consequently inhibited the growth of liver *** the effects of traditional Chinese herbal medicine are often not scientifically proven,Huang et al successfully identified the molecular mechanism involved in the anticancer effect of CB,and it is anticipated that the molecular mechanisms involved in the effects of other traditional Chinese herbal medicines will be scientifically elucidated,as demonstrated in this article.

关键词： Calculus bovis Chinese herbal medicine Wnt Hepatocellular carcinoma Liver cancer Tumor-associated macrophages M2 polarization

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CRL2^(APPBP2)-mediated TSPYL2 degradation counteracts human mesenchymal stem cell senescence

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Science China(Life Sciences) 2024年第3期67卷 460-474页

作者： Daoyuan Huang Qian Zhao Kuan Yang Jinghui Lei Ying Jing Hongyu Li Chen Zhang Shuai Ma Shuhui Sun Yusheng Cai Guibin Wang Jing Qu Weiqi Zhang Si Wang Guang-Hui Liu Advanced Innovation Centerfor Human Brain Protection National Clinical Research Centerfor Geriatric DisordersXuanwu Hospital Capital Medical UniversityBeijing 100053China State Key Laboratory of Stem cell and Reproductive biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Aging Translational MedicineCenter International Centerfor Aging and CancerBejing Municipal GeriatricMedical Research CenterXuanwu HospitalCapital Medical UniversityBeijing 100053China State Key Laboratory of Membrane biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Beijing institute for Stem cell and Regenerative Medicine Beijing100101China CAS Key Laboratory of Genomic and Precision Medicine Bejing Institute of Genomics and China National Center for BioinformationChinese Academy of SciencesBeijing 100101China institute for Stem cell and Regeneration CASBeijing 100101China The Fifth People's Hospital of Chongqing Chongqing 400062China Sino-Danish Cllege University of Chinese Academy of SciencesBeijing101408China National Laboratory of Biomacromolecules CAS Center for Excelence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing100101China State Key Laboratory of Proteomics Beijing Proteome Research CenterNational Center for Protein Sciences(Beijing)Beijing Institute of LifeomicsBeijing 102206China

Cullin-RING E3 ubiquitin ligases(CRLs),the largest family of multi-subunit E3 ubiquitin ligases in eukaryotic cells,represent core cellular machinery for executing protein degradation and maintaining ***,we asked what roles Cullin proteins play in human mesenchymal stem cell(hMSC)homeostasis and *** this end,we conducted a comparative aging phenotype analysis by individually knocking down Cullin members in three senescence models:replicative senescent hMSCs,Hutchinson-Gilford Progeria Syndrome hMSCs,and Werner syndrome *** all family members,we found that CUL2 deficiency rendered hMSCs the most susceptible to *** investigate CUL2-specific underlying mechanisms,we then applied CRISPR/Cas9-mediated gene editing technology to generate CUL2-deficient human embryonic stem cells(hESCs).When we differentiated these into h MSCs,we found that CUL2 deletion markedly accelerates hMSC ***,we identified that CUL2 targets and promotes ubiquitin proteasome-mediated degradation of TSPYL2(a known negative regulator of proliferation)through the substrate receptor protein APPBP2,which in turn downregulates one of the canonical aging marker-P21^(waf1/cip1),and thereby delays *** work provides important insights into how CRL2^(APPBP2)-mediated TSPYL2 degradation counteracts hMSC senescence,providing a molecular basis for directing intervention strategies against aging and aging-related diseases.

关键词： Cullins stem cell senescence aging proteostasis ubiquitination APPBP2 TSPYL2

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Targeting TrkB–PSD-95 coupling to mitigate neurological disorders

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Neural Regeneration Research 2025年第3期20卷 715-724页

作者： Xin Yang Yu-Wen Alvin Huang John Marshall Department of Molecular biology Cell Biology and BiochemistryBrown UniversityProvidenceRIUSA Department of Neurology Warren Alpert Medical School of Brown UniversityProvidenceRIUSA Center for Translational Neuroscience Robert J.and Nancy D.Carney Institute for Brain Science and Brown Institute for Translational ScienceBrown UniversityProvidenceRIUSA

Tropomyosin receptor kinase B(TrkB)signaling plays a pivotal role in dendritic growth and dendritic spine formation to promote learning and *** activity-dependent release of brain-derived neurotrophic factor at synapses binds to pre-or postsynaptic TrkB resulting in the strengthening of synapses,reflected by long-term ***,the association of postsynaptic density protein-95 with TrkB enhances phospholipase Cγ-Ca^(2+)/calmodulin-dependent protein kinaseⅡand phosphatidylinositol 3-kinase-mechanistic target of rapamycin signaling required for long-term *** this review,we discuss TrkB-postsynaptic density protein-95 coupling as a promising strategy to magnify brain-derived neurotrophic factor signaling towards the development of novel therapeutics for specific neurological disorders.A reduction of TrkB signaling has been observed in neurodegenerative disorders,such as Alzheimer's disease and Huntington's disease,and enhancement of postsynaptic density protein-95 association with TrkB signaling could mitigate the observed deficiency of neuronal connectivity in schizophrenia and *** with brain-derived neurotrophic factor is problematic,due to poor pharmacokinetics,low brain penetration,and side effects resulting from activation of the p75 neurotrophin receptor or the truncated TrkB.T1 *** TrkB agonists and antibodies that activate TrkB are being intensively investigated,they cannot distinguish the multiple human TrkB splicing isoforms or cell type-specific *** TrkB–postsynaptic density protein-95 coupling provides an alternative approach to specifically boost TrkB signaling at localized synaptic sites versus global stimulation that risks many adverse side effects.

关键词： Angelman syndrome autism brain-derived neurotrophic factor depression neurodegenerative disorder neurodevelopmental disorder postsynaptic density protein-95 synaptic plasticity TrkB

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