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The presence of phosphorylation form of D1 protein in its cross-linked aggregates in high light treated spinach leaves in vivo

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Chinese Science Bulletin 2006年第1期51卷 69-74页

作者： WEI Huimin guo Junwei zhang Shuang huang Bo LIU Yinqiu DU Linfang College of Life Science Sichuan University Chengdu 610064 China

In the present study, using specific antibody against D1 protein, we detected four ag- gregates of D1 protein in thylakoid membranes from spinach leaves illuminated at high light (800―2500 μmol photons·m?2·s?1) for 3 h. Their accumulations were dependent on the light intensity to which the leaves had been subjected. Further immunoblot analysis indicated that 70 kD aggregate was a prod- uct of D1 protein cross-linked with CP43, 65 and 60 kD aggregate were two cross-linked products be- tween D1 and D2 proteins, and 41 kD aggregate was one cross-linked D1 with α-subunit of cytochrome b559 (Cyt b559). This result provided the evidence for the existence of the aggregation of the D1 protein in vivo. The maximal level of D1/Cyt b559 aggregate occurred at 1000 μmol photons·m?2·s?1 but drastically decreased with further increasing light intensity. Im- munoblot analysis with phosphothreonine (Thr (P)) antibody indicated that D1/CP43 and D1/Cyt b559 aggregates contained the phosphorylated protein(s). In vitro dephosphorylation experiment also showed that D1/Cyt b559 and D1/CP43 aggregates lost the immunoreactivity with Thr (P) antibody after the phosphatase treatment of the membranes from high-light-illuminated leaves. Our results demon- strated that strong illumination of spinach leaves in- duced cross-linked products of D1 protein with its nearby polypeptides of PS Ⅱ , some of which con- tained the phosphorylated D1 protein.

关键词： D1蛋白质磷酸化菠菜强光处理叶片

LONG-TIME UNIFORM STABILITY OF SOLUTION TO MAGNETOHYDRODYNAMICS EQUATION

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Applied Mathematics:A Journal of Chinese Universities 1999年第1期 47-52页

作者： guo Boling\ zhang Linghai\ huang Haiyang

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Reversible on-off switching of spin-crossover behavior via photochemical [2+2] cycloaddition reaction

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Science China Chemistry 2022年第1期65卷 120-127页

作者： Long-Fei Wang Bang-Heng Lv Feng-Tai Wu guo-zhang huang Ze-Yu Ruan Yan-Cong Chen Min Liu Zhao-Ping Ni Ming-Liang Tong Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-Sen UniversityGuangzhou 510006China School of Nuclear Science and Technology University of South ChinaHengyang 421001China

Herein,we report the first example showing the reversible on-off switching of spin-crossover(SCO)property by solid state photochemical[2+2]*** ultraviolet(UV)light-induced[2+2]cycloaddition reaction of 3-spy ligands in a twodimensional(2D)Hofmann-type framework[Fe(3-spy)_(2){Pd(CN)_(4)}](1,3-spy=3-styrylpyridine),which shows a hysteretic twostep SCO behavior,gives a 3D Hofmann-type framework[Fe(rctt-3-ppcb){Pd(CN)_(4)}](2,rctt-3-ppcb=rctt-1,3-bis(3-pyridyl)-2,4-bis(phenyl)cyclobutane,r=reference group,c=cis and t=trans)accompanied with the disappearing of SCO ***,upon heating at 250℃ for 12 h,the rctt-3-ppcb ligand in 2 could be partially dedimerized to 3-spy with 68%completion through single-crystal-to-single-crystal(SCSC)transformation,giving the annealing complexes[Fe(3-spy)1.36(rctt-3-ppcb)0.32{Pd(CN)_(4)}](3)which display an incomplete SCO *** 2■3 interconversion is successfully achieved via continuous UV irradiation and thermal annealing,demonstrating the effectiveness of photochemical[2+2]reaction on switching on-off SCO properties.

关键词： reversible photo cycloaddition spin-crossover Hofmann-type frameworks photomagnetism

Enhancing single-molecule magnet behavior of linear Co~Ⅱ-Dy~Ⅲ-Co~Ⅱ complex by introducing bulky diamagnetic moiety

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Science China Chemistry 2018年第11期61卷 1399-1404页

作者： guo-zhang huang Ze-Yu Ruan Jie-Yu Zheng Jie-Yi Wu Yan-Cong Chen Quan-Wen Li Muhammad Nadeem Akhtar Jun-Liang Liu Ming-Liang Tong Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University

Single-molecule magnets （SMMs） are regarded as promising candidates for ultrahigh-density storage, quantum information processing and molecular spintronics. It is a crucial challenge for chemists to modulate magnetic dynamics of SMMs. Here, we successfully synthesized two 3d-4f polynuclear compounds [Co2Dy（TTTTCl）2（MeOH）]NO3.3MeOH （1） and [Co2Dy（TTTTCl）2 （MeOH）][Co（HTTTTCl）]（NO3）z-2.5MeOH＇2H20 （2）, where H3TTTTCl=2,2＇,2＂-（（（nitrilotris（ethane-2,1-diyl）） tris（azanediyl）） tris（methylene））tris-（4-chlorophenol）. On applying the approach by co-crystallization of bulky diamagnetic moiety, the effective energy barrier enhances from 401 K （1） to 536 K （2）, which are both among the highest d-f heterometallic SMMs.

关键词： 3d-4f single-molecule magnets co-crystallization magnetic dynamics

Photochromic radical states in 3D covalent organic frameworks with zyg topology for enhanced photocatalysis

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National Science Review 2024年第7期11卷 177-188页

作者： Tian-Tian Ma guo-zhang huang Xiao-Han Wang Yan Liang Run-Han Li Bin Wang Su-Juan Yao Jia-Peng Liao Shun-Li Li Yong Yan Ya-Qian Lan School of Chemistry South China Normal University Department of Chemistry Guangdong Provincial Key Laboratory of Catalytic Chemistry Southern University of Science and Technology

Covalent-organic frameworks（COFs） with photoinduced donor-acceptor（D-A） radical pairs show enhanced photocatalytic activity in principle. However, achieving long-lived charge separation in COFs proves challenging due to the rapid charge recombination. Here, we develop a novel strategy by combining[6 + 4] nodes to construct zyg-type 3D COFs, first reported in COF chemistry. This structure type exhibits a fused Olympic-rings-like shape, which provides a platform for stabilizing the photoinduced D-A radical pairs. The zyg-type COFs containing catalytically active moieties such as triphenylamine and phenothiazine（PTZ） show superior photocatalytic production rates of hydrogen peroxide（H2O2）. Significantly, the photochromic radical states of these COFs show up to 400% enhancement in photocatalytic activity compared to the parent states, achieving a remarkable H2O2synthesis rate of 3324 μmol g-1h-1, which makes the PTZ-COF one of the best crystalline porous photocatalysts in H2O2production. This work will shed light on the synthesis of efficient 3D COF photocatalysts built on topologies that can facilitate photogenerating D-A radical pairs for enhanced photocatalysis.

关键词： 3D covalent-organic frameworks photochromic radical states donor and acceptor hydrogen peroxide photocatalysis

Percutaneous Balloon Angioplasty for Severe Native Aortic Coarctation in Young Infants Less Than 6 Months： Medium- to Long-term Follow-up

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Chinese Medical Journal 2015年第8期128卷 1021-1025页

作者： Lan He Fang Liu Lin Wu Chun-Hua Qi Li-Feng zhang guo-Ying huang Pediatric Heart Center Children's Hospital of Fudan University Shanghai 201102 China

Background： Although balloon angioplasty （BA） has been performed for more than 20 years, its use as a treatment for native coarctation of the aorta （CoA） during childhood, especially in young infants, remains controversial. This study aimed to assess the effects and potential role ofpercutaneous transcatheter BA for native CoA as an alternative therapy to surgical repair in young infants. Methods： The 37 patients aged from 6 days to 6 months with severe CoA in congestive heart failure or circulatory shock were admitted for BA. Patient＇s weight ranged from 2.4 to 6.1 kg. All 37 patients were experiencing cardiac dysfunction, and eight patients were in cardiac shock with severe metabolic acidosis. Eleven patients had an isolated CoA, whereas the others had a CoA associated with other cardiac malformations. Cardiac catheterization and aortic angiography were performed under general anesthesia with intubation. Transfemoral arterial approaches were used for the BA. The size of the balloon ranged from 3 mm × 20 mm to 8 mm × 20 mm, and a coronary artery balloon catheter was preferred over a regular peripheral vascular balloon catheter. Results： The femoral artery was successfully punctured in all but one patient, with that patient undergoing a carotid artery puncture. The systolic peak pressure gradient （PG） across the coarctation was 41.0 ± 16.0 mmHg （range 13-76 mmHg）. The mean diameter of the narrowest coarctation site was 1.7 ± 0.6 mm （range 0.5-2.8 mm）. All patients had successful dilation; the PG significantly decreased to 13.0 ± 11.0 mmHg （range 0-40 mmHg）, and the diameter ofcoarctation significantly improved to 3.8 ± 0.9 mm （range 2.5-5.3 mm）. No intraoperative complications occurred for any patients. However, in one case that underwent a carotid artery puncture, a giant aneurysm formed at the puncture site and required surgical repair. The following observations were made during the follow-up period from 6-month to 7-year：（1） The PG across the coarctation measur

关键词： Native Aortic Coarctation Percutaneous Balloon Angioplasty Young Infants

Multiresponsive Spin Crossover Driven by Rotation of Tetraphenylborate Anion in an Iron(Ⅲ)Complex

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CCS Chemistry 2021年第1期3卷 453-459页

作者： Si-guoWu Md.Najbul Hoque Jie-Yu Zheng guo-zhang huang Nguyen Vu Ha Anh Liviu Ungur Wei-Xiong zhang Zhao-Ping Ni Ming-Liang Tong Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-Sen UniversityGuangzhou 510275 Department of Chemistry National University of SingaporeSingapore 117543

Dynamic molecular materials,which involvemechanical motions in crystals,usually exhibit tunable properties related to conformational ***,we describe a solvent-free molecular crystal[{FeⅢ(salten)}2(TPB)](BPh_(4))_(2)(Ⅰ)developed by associating the rotatable tetraphenylborate anion with the spin crossover(SCO)binuclear iron(Ⅲ)*** solvent-free phaseⅠcan undergo a temperature-induced phase transformation to phaseⅡ,during which rotation of the BPh4−anion interplays with the SCO component,giving rise to fascinating variations in SCO(from gradual to abrupt)and dielectric *** importantly,an unexpected polymorphic transformation fromⅡtoⅢorⅣ,with increasing magnetic hysteresis,is realized by exposingⅡto water or ethanol vapor;the transition is reversible by *** rare successive transformation is further rationalized by theoretical ***,this multiresponse system provides a new way for modulating synergistic effects and designing dynamic SCO materials by integrating intramolecular motions in the crtystal lattice.

关键词： intramolecular motion iron(Ⅲ) spin crossover polymorph single-crystal-to-singlecrystal transformation

Deciphering the role of ultra-low-loaded rhodium in NiFe-MIL-53 for superior oxygen evolution reaction

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Journal of Energy Chemistry 2025年第1期100卷 77-86页

作者： Jinzhi Jia Jinhua zhang Kailu guo Lanyue zhang Gening Du Hao You Junfeng huang Mudong Tu Hua Li Yong Peng Wei Dou Cailing Xu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering School of Materials and Energy Lanzhou University College of Chemistry and Chemical Engineering Luoyang Normal University

Designing highly active and stable electrocatalysts of oxygen evolution reaction （OER） is one of the crucial *** this study,a novel OER electrocatalyst,NiFe-MIL-53 modified with ultra-low rhodium（Rh@NiFe-MIL-53）,is successfully prepared via the hydrothermal ***-situ Raman spectroscopy and electrochemical impedance spectroscopy reveal that the doped Rh accelerates the phase transformation of NiFe-MIL-53 and the in-situ formed Rh@NiFeOOH is the actual active *** importantly,the enhanced reversibility of electrochemical reconstruction between NiFeOOH and NiFe（OH）2after doping Rh is beneficial for improving the electrochemical stability of the catalyst.X-ray photoelectron spectroscopy spectra show the strong electronic interaction between single-atom Rh and Ni/Fe in Rh@***,theoretical calculations confirm that the integration of single-atom Rh into the NiFeOOH successfully reduces the band gap,regulates the d-band center （εd）,accelerates the charge transfer,and optimizes the adsorption behavior of oxygen-containing intermediates,thereby lowering the energy barrier of rate-determining ***,the optimized Rh@NiFe-MIL-53 exhibits excellent OER activity （240 mV） with a small Tafel slope of 48.2 mV dec-1and long-term durability (over1270 h at 10 m A cm-2and 110 h at 200 mA cm-2).This work presents a new perspective on designing highly efficient OER electrocatalysts.

关键词： NiFe-MIL-53 Rh Electrochemical reconstruction Catalytic mechanism Oxygen evolution reaction

Glucocorticoid receptor signaling in the brain and its involvement in cognitive function

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Neural Regeneration Research 2025年第9期20卷 2520-2537页

作者： Chonglin Su Taiqi huang Meiyu zhang Yanyu zhang Yan Zeng Xingxing Chen Brain Science and Advanced Technology Institute Hubei Province Key Laboratory of Occupational Hazard Identification and ControlSchool of MedicineWuhan University of Science and TechnologyWuhanHubei ProvinceChina

The hypothalamic-pituitary-adrenal axis regulates the secretion of glucoco rticoids in response to environmental *** the brain,a nuclear receptor transcription fa ctor,the glucocorticoid recepto r,is an important component of the hypothalamicpituitary-a d renal axis's negative feedback loop and plays a key role in regulating cognitive equilibrium and *** glucoco rticoid receptor influences cognitive processes,including glutamate neurotransmission,calcium signaling,and the activation of brain-derived neurotrophic factor-mediated pathways,through a combination of genomic and non-genomic *** interactions within the central nervous system can alter the expression and activity of the glucocorticoid receptor,there by affecting the hypothalamic-pituitary-a d renal axis and stress-related cognitive *** appropriate level of glucocorticoid receptor expression can improve cognitive function,while excessive glucocorticoid receptors or long-term exposure to glucoco rticoids may lead to cognitive *** with cognitive impairment-associated diseases,such as Alzheimer's disease,aging,depression,Parkinson's disease,Huntington's disease,stroke,and addiction,often present with dysregulation of the hypothalamic-pituitary-adrenal axis and glucocorticoid receptor *** review provides a comprehensive overview of the functions of the glucoco rticoid receptor in the hypothalamic-pituitary-a d renal axis and cognitive *** emphasizes that appropriate glucocorticoid receptor signaling fa cilitates learning and memory,while its dysregulation can lead to cognitive *** provides clues about how glucocorticoid receptor signaling can be targeted to ove rcome cognitive disability-related disorders.

关键词： brain-derived neurotrophic factor calcium signaling glucocorticoid receptor glucocorticoid glutamate transmission hypothalamic-pituitary-adrenal axis long-term potentiation neurocognitive disorders neuroplasticity stress