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Kerayu BA, Hung CH, Vardhaman AK, Ayanie TA, Geneti BJ. 2,5-Thienylene-Strapped [26]Hexaphyrin as Multifunctional Chemosensor for Hg 2+, Cu 2+, and F - Ions. Chem Biodivers 2024; 21:e202301727. [PMID: 38400868 DOI: 10.1002/cbdv.202301727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 02/21/2024] [Accepted: 02/24/2024] [Indexed: 02/26/2024]
Abstract
The sensing behavior of 2,5-thienylene-bridged tetrakis(2,6-dichlorophenyl)-[26]hexaphyrin (2) towards various metal ions and anions were investigated by UV-vis and fluorescence spectroscopies. Using this strapped hexaphyrin (2), the molecular sensor displayed highly selective and sensitive colorimetric responses to Cu2+ and Hg2+ in MeOH/THF. The spectral changes are distinctive enough in the visible region of the spectrum to enable naked-eye detection. The detection limits of Cu2+ and Hg2+ using this chemo-sensor in a mixed MeOH/THF solution were 1.978 and 1.283 μM, respectively, and 1.052 μM for F- in dichloromethane. Chemosensor 2,5-thienylene strapped [26]hexaphyrin (2) shows absorption responses both a 1 : 1 molecular ratio for 2 interacting with Cu2+ and Hg2+ and a 1 : 2 ratio between 2 and F- ions.
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Affiliation(s)
| | - Chen-Hsiung Hung
- Institute of Chemistry, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei, 11529, Taiwan
| | - Anil Kumar Vardhaman
- Institute of Chemistry, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei, 11529, Taiwan
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2
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Cui Z, He F, Li X, Li Y, Huo C, Wang H, Qi Y, Tian G, Zong W, Liu R. Response pathways of superoxide dismutase and catalase under the regulation of triclocarban-triggered oxidative stress in Eisenia foetida: Comprehensive mechanism analysis based on cytotoxicity and binding model. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 854:158821. [PMID: 36116645 DOI: 10.1016/j.scitotenv.2022.158821] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 06/15/2023]
Abstract
Triclocarban (TCC) is an emerging environmental contaminant, posing potential ecological risks. Displaying a high accumulation effect and 120-day half-life in the soil environment, the toxic effects of TCC to soil organisms have been widely reported. Previous studies have confirmed that TCC can induce the oxidative stress and changes in superoxide dismutase (SOD) and catalase (CAT) activities in earthworms, but the underlying mechanisms of oxidative stress and disorder in antioxidant enzyme activities induced by TCC have not yet been elucidated. Here, we explored the multiple response mechanisms of SOD and CAT under the regulation of oxidative stress induced by TCC. Results indicated that higher-dose (0-2.0 mg/L) TCC exposure triggered the overproduction of ROS in Eisenia foetida coelomocytes, causing oxidative damage and a decrease in cell viability that was response to ROS accumulation. The TCC-induced inhibition of intracellular SOD/CAT activity was found under the regulation of oxidative stress (SOD: 29.2 %; CAT: 18.5 %), and this effect was blunted by antioxidant melatonin. At the same time, the interaction between antioxidative enzymes and TCC driven by various forces (SOD: electrostatic interactions; CAT: van der Waals forces and hydrogen bonding) led to inhibited SOD activity (9.84 %) and enhanced CAT activity (17.5 %). Then, to elucidate the binding mode of TCC, we explored the changes in SOD and CAT structure (protein backbone and secondary structure), the microenvironment of aromatic amino acids, and aggregation behavior through multispectral techniques. Molecular docking results showed that TCC inhibited SOD activity in a substrate competitive manner and enhanced CAT activity by the stabilizing effects of TCC on the heme groups. Collectively, this study reveals the response mechanisms of SOD/CAT under the regulation of TCC-triggered oxidative stress and shed a new light on revealing the toxic pathways of exogenous pollutants on antioxidant-related proteins function.
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Affiliation(s)
- Zhihan Cui
- School of Environmental Science and Engineering, Shandong University, PR China; America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Falin He
- School of Environmental Science and Engineering, Shandong University, PR China; America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Xiangxiang Li
- School of Environmental Science and Engineering, Shandong University, PR China; America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Yuze Li
- School of Environmental Science and Engineering, Shandong University, PR China; America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Chengqian Huo
- School of Environmental Science and Engineering, Shandong University, PR China; America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Hao Wang
- School of Environmental Science and Engineering, Shandong University, PR China; America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Yuntao Qi
- School of Environmental Science and Engineering, Shandong University, PR China; America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Guang Tian
- School of Environmental Science and Engineering, Shandong University, PR China; America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Wansong Zong
- College of Geography and Environment, Shandong Normal University, 88# East Wenhua Road, Jinan, Shandong 250014, PR China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, PR China; America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China.
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Xue Y, Zhang XG, Lu ZP, Xu C, Xu HJ, Hu Y. Enhancing the Catalytic Performance of Candida antarctica Lipase B by Chemical Modification With Alkylated Betaine Ionic Liquids. Front Bioeng Biotechnol 2022; 10:850890. [PMID: 35265607 PMCID: PMC8899502 DOI: 10.3389/fbioe.2022.850890] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 01/27/2022] [Indexed: 11/24/2022] Open
Abstract
Various betaine ionic liquids composed of different chain lengths and different anions were designed and synthesized to modify Candida antarctica lipase B (CALB). The results showed that the catalytic activity of all modified lipases improved under different temperature and pH conditions, while also exhibiting enhanced thermostability and tolerance to organic solvents. With an increase in ionic liquid chain length, the modification effect was greater. Overall, CALB modified by [BetaineC16][H2PO4] performed best, with the modified CALB enzyme activity increased 3-fold, thermal stability increased 1.5-fold when stored at 70°C for 30 min, with tolerance increased 2.9-fold in 50% DMSO and 2.3-fold in 30% mercaptoethanol. Fluorescence and circular dichroism (CD) spectroscopic analysis showed that the introduction of an ionic liquid caused changes in the microenvironment surrounding some fluorescent groups and the secondary structure of the CALB enzyme protein. In order to establish the enzyme activity and stability change mechanisms of the modified CALB, the structures of CALB modified with [BetaineC4][Cl] and [BetaineC16][Cl] were constructed, while the reaction mechanisms were studied by molecular dynamics simulations. Results showed that the root mean square deviation (RMSD) and total energy of modified CALB were less than those of native CALB, indicating that modified CALB has a more stable structure. Root mean square fluctuation (RMSF) calculations showed that the rigidity of modified CALB was enhanced. Solvent accessibility area (SASA) calculations exhibited that both the hydrophilicity and hydrophobicity of the modified enzyme-proteins were improved. The increase in radial distribution function (RDF) of water molecules confirmed that the number of water molecules around the active sites also increased. Therefore, modified CALB has enhanced structural stability and higher hydrolytic activity.
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Affiliation(s)
| | | | | | | | | | - Yi Hu
- *Correspondence: Hua-Jin Xu, ; Yi Hu,
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Xue J, Shi K, Chen C, Bai Y, Cui Q, Li N, Fu X, Qiao Y. Evaluation of response of dynamics change in bioaugmentation process in diesel-polluted seawater via high-throughput sequencing: Degradation characteristic, community structure, functional genes. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123569. [PMID: 32798793 DOI: 10.1016/j.jhazmat.2020.123569] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/07/2020] [Accepted: 07/21/2020] [Indexed: 06/11/2023]
Abstract
Identification of microorganisms that contribute to the whole microbial community is important. In this study, dynamic changes in bioaugmentation process in diesel-polluted seawater collected from two different sites were assessed via simulation experiments. Ultraviolet spectrophotometry and analysis using the molecular operating environment software revealed that the degradation rate of diesel due to bioaugmentation was higher than 70 % after 45 days because of the formation of hydrogen bonds among biosurfactants and diesel components. Community structure and functional genes were analysed via high-throughput sequencing. Results showed that community diversity recovered during bioaugmentation. Principal coordinate analysis showed that the difference in microbial community between the two sites was considerably smaller than that when diesel was added and bioaugmentation was conducted. After bioaugmentation, the main families playing key roles in degradation that became dominant were Alcanivoracaceae, Rhodobiaceae, and Rhodospirillaceae. Moreover, the abundance of functional genes remarkably increased at two different sites.
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Affiliation(s)
- Jianliang Xue
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China.
| | - Ke Shi
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China
| | - Chuan Chen
- School of Environment, Harbin Institute of Technology, Haerbin, Heilongjiang, 150001, China
| | - Yu Bai
- Chinaunicom System Integration Co., Ltd, No.131, Xidan North Road, Beijing, 100085, China
| | - Qinqin Cui
- School of Architecture and Engineering, Qingdao Binhai University, Qingdao, Shandong, 266555, China
| | - Nana Li
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China
| | - Xinge Fu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China
| | - Yanlu Qiao
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China.
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Zhang F, Li B, Dong H, Chen M, Yao S, Li J, Zhang H, Liu X, Wang H, Song N, Zhang K, Du N, Xu S, Gu L. YdiV regulates Escherichia coli ferric uptake by manipulating the DNA-binding ability of Fur in a SlyD-dependent manner. Nucleic Acids Res 2020; 48:9571-9588. [PMID: 32813023 PMCID: PMC7515728 DOI: 10.1093/nar/gkaa696] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 07/31/2020] [Accepted: 08/13/2020] [Indexed: 12/19/2022] Open
Abstract
Iron is essential for all bacteria. In most bacteria, intracellular iron homeostasis is tightly regulated by the ferric uptake regulator Fur. However, how Fur activates the iron-uptake system during iron deficiency is not fully elucidated. In this study, we found that YdiV, the flagella gene inhibitor, is involved in iron homeostasis in Escherichia coli. Iron deficiency triggers overexpression of YdiV. High levels of YdiV then transforms Fur into a novel form which does not bind DNA in a peptidyl-prolyl cis-trans isomerase SlyD dependent manner. Thus, the cooperation of YdiV, SlyD and Fur activates the gene expression of iron-uptake systems under conditions of iron deficiency. Bacterial invasion assays also demonstrated that both ydiV and slyD are necessary for the survival and growth of uropathogenic E. coli in bladder epithelial cells. This reveals a mechanism where YdiV not only represses flagella expression to make E. coli invisible to the host immune system, but it also promotes iron acquisition to help E. coli overcome host nutritional immunity.
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Affiliation(s)
- Fengyu Zhang
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, P.R. China
| | - Bingqing Li
- Key Laboratory of Rare and Uncommon Diseases, Department of Microbiology, Institute of Basic Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877 Jingshi Road, Jinan 250062, P.R. China
| | - Hongjie Dong
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, P.R. China
| | - Min Chen
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, P.R. China
| | - Shun Yao
- School of Life Sciences, Shandong University, 72 Binhai Road, Qingdao 266237, P.R. China
| | - Jingwen Li
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao 266237, P.R. China
| | - Honghai Zhang
- Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Shandong University, 44 Wenhuaxi Road, Jinan 250012, P. R. China
| | - Xiangguo Liu
- School of Life Sciences, Shandong University, 72 Binhai Road, Qingdao 266237, P.R. China
| | - Hongwei Wang
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, P.R. China
| | - Nannan Song
- Key Laboratory of Rare and Uncommon Diseases, Department of Microbiology, Institute of Basic Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877 Jingshi Road, Jinan 250062, P.R. China
| | - Kundi Zhang
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, P.R. China
| | - Ning Du
- School of Life Sciences, Shandong University, 72 Binhai Road, Qingdao 266237, P.R. China
| | - Sujuan Xu
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, P.R. China
| | - Lichuan Gu
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, P.R. China
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Jing M, Tang R, Han G, Zhang S, Liu R. Exploring the influence of silver and lead on structure and function of xylanase: spectroscopic and calorimetric methods. Toxicol Res (Camb) 2020; 9:182-190. [PMID: 32850115 DOI: 10.1093/toxres/tfaa013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 02/07/2020] [Indexed: 11/14/2022] Open
Abstract
Soil contamination with heavy metal could induce the alteration of soil ecological environments, and soil enzyme activities are sensitive indicators for the soil toxicology. Xylanase is one of predominant soil enzymes related to carbon nitrogen cycle. In this work, we explored the underlying mechanisms for conformational and enzymatic activity alterations of xylanase after silver and lead exposure at molecular level with systematical measurements including multiple spectroscopic methods, isothermal titration calorimetry, and enzymatic activity. Both silver and lead could loosen and unfold the skeleton of xylanase with the quenching of endogenous fluorescence. Silver interacted with xylanase forming larger-size aggregations through Van der Waals forces and hydrogen bonding, while lead interacted with xylanase forming larger-size aggregations through hydrophobic force. Silver and lead induced an obvious loss (67.1 and 56.31%) of the xylanase enzymatic activity, but silver has a greater impact on xylanase than that of lead. The xylanase enzymatic activity significantly decreased due to the conformational alterations. The negative effect of silver exposure on xylanase structure and function was more prominent than that of lead.
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Affiliation(s)
- Mingyang Jing
- School of Environmental Science and Engineering, Shandong University, America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong 266237, P.R. China.,Penglai Jiaxin Dye Chemical Co., Ltd, 1#Jiaxin Road, Yantai, Shandong 265601, P.R. China
| | - Rui Tang
- School of Environmental Science and Engineering, Shandong University, America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong 266237, P.R. China
| | - Guangye Han
- Shandong Academy of Environmental Sciences Co., Ltd, Lixia, 50# Lishan Road, Jinan, Shandong 250100, P.R. China
| | - Shansheng Zhang
- Penglai Jiaxin Dye Chemical Co., Ltd, 1#Jiaxin Road, Yantai, Shandong 265601, P.R. China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong 266237, P.R. China
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