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Yang H, Zhao Z, Li H, Wang L. Metal binding feature of copper‒induced metallothionein from freshwater crab Sinopotamon henanense reveals its Cu‒thionein character. Protein Expr Purif 2024; 221:106519. [PMID: 38830441 DOI: 10.1016/j.pep.2024.106519] [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: 02/17/2024] [Revised: 05/24/2024] [Accepted: 05/30/2024] [Indexed: 06/05/2024]
Abstract
Sinopotamon Henanense expresses two metal‒induced metallothioneins (MTs), Cd‒induced MT and Cu‒induced MT (ShCuMT). The Cd‒induced MT has been characterized as a Cd‒thiolate MT. However, it is unknown whether ShCuMT is a Cu‒thiolate MT. In the present study, ShCuMT was expressed heterologously in Escherichia coli and purified by Ni‒NTA column and superdex‒75 column. And its metal‒binding feature was evaluated by DTNB reaction, circular dichroism spectroscopy (CD), isothermal microtitration (ITC), electrospray flight mass spectrometry (ESI‒TOF‒MS), and matrix‒assisted laser desorption ionization flight mass spectrometry (MALDI‒TOF‒MS). Bioinformatics analysis demonstrated that ShCuMT possessed the cysteine‒triplet motif of a Cu‒specific MT. Expression and purification of ShCuMT illustrated that SUMO tag used as the production system for ShCuMT resulted in a high production yield. The stability order of ShCuMT binding metal ions were Cu (Ⅰ) > Cd (Ⅱ) > Zn (Ⅱ). The CD spectrum indicated that ShCuMT binding with Cu (I) exhibited a compact thiol metal clusters structure. Besides, there emerged no a visible nickel‒thiol absorption after Ni‒NTA column affinity chromatography. The ITC results implied that Cu‒ShCuMT possessed the optimal thermodynamic conformation and the highest stoichiometric number of Cu (Ⅰ). Overall, the results suggested that SUMO fusion system is a robust and inexpensive approach for ShCuMT expression and Ni‒NTA column had no influence on metal binding of ShCuMT and Cu(Ⅰ) was considered its cognate metal ion, and ShCuMT possessed canonical Cu‒thiolate characteristics. The metal binding feature of ShCuMT reported here contributes to elucidating the structure‒function relationship of ShCuMT in S. Henanense.
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Affiliation(s)
- Huizhen Yang
- Shanxi Key Laboratory for Modernization of TCVM/ College of Veterinary Medicine, Shanxi Agriculture University, Jinzhong, Shanxi Province, 030800, China.
| | - Ziyan Zhao
- Shanxi Key Laboratory for Modernization of TCVM/ College of Veterinary Medicine, Shanxi Agriculture University, Jinzhong, Shanxi Province, 030800, China
| | - Hongquan Li
- Shanxi Key Laboratory for Modernization of TCVM/ College of Veterinary Medicine, Shanxi Agriculture University, Jinzhong, Shanxi Province, 030800, China.
| | - Lan Wang
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, 030006, China.
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Structural Characterization and In Vitro Antioxidant Activity of Metallothionein from Oratosquilla oratoria. Molecules 2022; 27:molecules27072320. [PMID: 35408719 PMCID: PMC9000697 DOI: 10.3390/molecules27072320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/28/2022] [Accepted: 03/29/2022] [Indexed: 02/01/2023] Open
Abstract
We report here the purification of a novel metal-binding protein from Oratosquilla oratoria (O. oratoria MT-1) by gel and ion-exchange chromatography. SDS-PAGE and MALDI-TOF analyses demonstrated that isolated O. oratoria MT-1 was of high purity with a molecular weight of 12.4 kDa. The fluorescence response to SBD-F derivatives revealed that O. oratoria MT-1 contained a large number of sulfhydryl groups, which is a general property of metallothioneins. Zn and Cu metal stoichiometries for O. oratoria MT-1 were 3.97:1 and 0.55:1, respectively. The proportion of cysteine (Cys) residues in the amino acid composition was 32.69%, and aromatic amino acids were absent. The peptide sequence coverage with Macrobrachium rosenbergii calmodulin (accession AOA3S8FSK5) was 60%. Infrared spectroscopy of O. oratoria MT-1 revealed two obvious peaks at absorption frequencies for the amide I band and the amide II band. CD spectra revealed that the secondary structure was mainly composed of random coil (57.6%) and β-sheet (39.9%). An evaluation of in vitro antioxidant activity revealed that isolated O. oratoria MT-1 has strong reducing activities, exhibiting scavenging rates for DPPH and OH of 77.8% and 75.8%, respectively (IC50 values 0.57 mg/mL and 1.1 mg/mL). O. oratoria MT-1 may be used as a functional additive in cosmetics, health foods, and medical products, as well as a reference material for quantitative analysis of metallothionein in such products.
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Liu Y, Wu Z, Guo K, Zhou Y, Xing K, Zheng J, Sun Y, Zhang J. Metallothionein-1 gene from Exopalaemon carinicauda and its response to heavy metal ions challenge. MARINE POLLUTION BULLETIN 2022; 175:113324. [PMID: 35051848 DOI: 10.1016/j.marpolbul.2022.113324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 12/09/2021] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
Metallothioneins (MTs) belong to a conserved low-molecular-weight protein family that participates in heavy metal binding and detoxification. EcMT-1 was amplified by PCR from genomic DNA of Exopalaenon carinicauda. It contained a 180 bp open reading frame and encoded 59 amino acids. A total of 18 cysteine (Cys) residues were found in the deduced amino acid sequence, which was consistent with the Cys-rich characteristics of MTs. EcMT-1 was mainly expressed in hepatopancreas, followed by stomach and gill. The expression profiles of EcMT-1 indicated that EcMT-1 was significantly increased at 24, 48 h and 12, 24, and 48 h under the treatment of 2.5 μmol/L CdCl2 and 50 μmol/L CuSO4. The expression of EcMT-1 at gastrula stage was very low; it was detectable until nauplius stage, and the highest expression level appeared in the postlarvae stage.
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Affiliation(s)
- Yujie Liu
- School of Life Sciences, Institute of Life and Green Development, Hebei University, Baoding 071002, China
| | - Zixuan Wu
- School of Life Sciences, Institute of Life and Green Development, Hebei University, Baoding 071002, China
| | - Kun Guo
- School of Life Sciences, Institute of Life and Green Development, Hebei University, Baoding 071002, China
| | - Yongzhao Zhou
- School of Life Sciences, Institute of Life and Green Development, Hebei University, Baoding 071002, China
| | - Kefan Xing
- School of Life Sciences, Institute of Life and Green Development, Hebei University, Baoding 071002, China
| | - Jiaqi Zheng
- School of Life Sciences, Institute of Life and Green Development, Hebei University, Baoding 071002, China
| | - Yuying Sun
- School of Life Sciences, Institute of Life and Green Development, Hebei University, Baoding 071002, China.
| | - Jiquan Zhang
- School of Life Sciences, Institute of Life and Green Development, Hebei University, Baoding 071002, China.
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Camacho-Abrego I, González-Cano SI, Aguilar-Alonso P, Brambila E, la Cruz FD, Flores G. Changes in nitric oxide, zinc and metallothionein levels in limbic regions at pre-pubertal and post-pubertal ages presented in an animal model of schizophrenia. J Chem Neuroanat 2020; 111:101889. [PMID: 33197552 DOI: 10.1016/j.jchemneu.2020.101889] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 11/11/2020] [Accepted: 11/11/2020] [Indexed: 12/11/2022]
Abstract
Recent data suggest that rats with neonatal ventral hippocampal lesion (NVHL) show changes related to inflammatory processes and oxidative stress at the prefrontal cortex (PFC) level at post-pubertal age. The NVHL model is considered an animal model in schizophrenia. Here we analyzed the levels of nitrite, zinc, and metallothionein (MT) in cortical and subcortical regions of NVHL rats at pre-pubertal and post-pubertal ages. Nitric oxide (NO) levels were evaluated through measurement of nitrite levels. The locomotor activity was also evaluated in a novel environment. Animals with NVHL showed an increase in locomotor activity only at post-pubertal age. Furthermore, at pre-pubertal age, NVHL rats showed an increase in NO levels in ventral and dorsal hippocampus, thalamus, Caudate-putamen (CPu) and brainstem, in zinc levels in ventral and dorsal hippocampus, and CPu, and the MT level also in the ventral hippocampus and occipital cortex. In addition, at pre-pubertal age, a reduction in MT levels was also found in the PFC, parietal and temporal cortices, the CPu and the cerebellum. However, after puberty, NVHL caused an increase in NO levels in the PFC, and also zinc levels in the PFC and occipital and parietal cortices, with a reduction in MT levels in the thalamus and NAcc. Our results show the changes of these three molecules over time, among lesion (PD7), pre-pubertal and post-pubertal ages. This suggests changes at pre-pubertal age directly related to the site of the lesion, while at post-pubertal age, our data highlight changes in the PFC, a region mainly involved in schizophrenia.
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Affiliation(s)
- Israel Camacho-Abrego
- Laboratorio de Neuropsiquiatría. Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla (BUAP), Puebla, 72570, Mexico
| | - Sonia Irais González-Cano
- Laboratorio de Neuropsiquiatría. Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla (BUAP), Puebla, 72570, Mexico; Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional (IPN), CDMX, 11340, Mexico
| | - Patricia Aguilar-Alonso
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, CP: 72570, Puebla, Mexico
| | - Eduardo Brambila
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, CP: 72570, Puebla, Mexico
| | - Fidel de la Cruz
- Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional (IPN), CDMX, 11340, Mexico
| | - Gonzalo Flores
- Laboratorio de Neuropsiquiatría. Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla (BUAP), Puebla, 72570, Mexico.
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Luo J, Zhu T, Wang X, Cheng X, Yuan Y, Jin M, Betancor MB, Tocher DR, Zhou Q. Toxicological mechanism of excessive copper supplementation: Effects on coloration, copper bioaccumulation and oxidation resistance in mud crab Scylla paramamosain. JOURNAL OF HAZARDOUS MATERIALS 2020; 395:122600. [PMID: 32272279 DOI: 10.1016/j.jhazmat.2020.122600] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 03/01/2020] [Accepted: 03/26/2020] [Indexed: 06/11/2023]
Abstract
Copper is a widespread pollutant in marine environments, and marine animals can ingest large amounts of copper through the food chain. Here, an 8-week feeding trial was designed to investigate the effects of different dietary copper levels on coloration, copper bioaccumulation, stress response and oxidation resistance of juvenile mud crab Scylla paramamosain. The results indicated that crabs fed the diet with 162 mg/kg copper exhibited a dark-blue carapace and hemolymph. The accumulation of copper in tissues was positively correlated with the level of copper in feed. High/excess dietary copper (162 mg/kg) up-regulated the expression of stress response related genes, and reduced the expression/activities of anti-oxidation genes/enzymes. The activity of phenoloxidase decreased significantly when dietary copper level was 86-162 mg/kg, and the expression of hemocyanin was up-regulated in crab fed the diets with 28-162 mg/kg copper. Overall, the results of the present study indicated that high dietary copper led to parachrea in carapace and hemolymph of mud crab, and caused copper deposition abnormality in carapace and hepatopancreas. The data suggested that the toxic effects of dietary copper were concentration-dependent such that, excess dietary copper (162 mg/kg) had adverse impacts on oxidation resistance.
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Affiliation(s)
- Jiaxiang Luo
- Laboratory of Fish and Shellfish Nutrition, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Tingting Zhu
- Laboratory of Fish and Shellfish Nutrition, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Xuexi Wang
- Laboratory of Fish and Shellfish Nutrition, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Xin Cheng
- Laboratory of Fish and Shellfish Nutrition, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Ye Yuan
- Laboratory of Fish and Shellfish Nutrition, School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Min Jin
- Laboratory of Fish and Shellfish Nutrition, School of Marine Sciences, Ningbo University, Ningbo 315211, China.
| | - Mónica B Betancor
- Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling FK9 4LA, Scotland, UK
| | - Douglas R Tocher
- Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling FK9 4LA, Scotland, UK.
| | - Qicun Zhou
- Laboratory of Fish and Shellfish Nutrition, School of Marine Sciences, Ningbo University, Ningbo 315211, China.
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Thatipaka SDR, Paila RV, Polaki S. Copper-induced oxidative stress and biomarkers in the postlarvae of Penaeus indicus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:29612-29622. [PMID: 32440880 DOI: 10.1007/s11356-020-08876-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
The objective of the present research is to study the levels of reactive oxygen species (ROS) and protein carbonyl (PC) and the functional protein levels of metallothioneins (MT) in Penaeus indicus postlarvae (PL) upon sublethal copper exposure and to determine the biomarkers. The PL were exposed to sublethal copper of 0.164 ppm. The experiments were carried out in the laboratory over a period of 30 days with sampling intervals of 24, 48, and 96 h and 10, 20, and 30 days. The present study confirms that high oxidative stress can be induced from 24 h onwards upon sublethal exposure to copper in P. indicus PL. This is evident from the increasing levels of ROS in the exposed PL during both short-term and long-term exposures to sublethal copper. Since variability in metallothionein levels from 24 h through 30 days of experimental period was observed, metallothioneins cannot be regarded as a good biomarker as far as copper toxicity with respect to P. indicus PL is concerned. The effect of copper on protein carbonyl seems to be very rapid and consistent. The results suggest that protein carbonyl in P. indicus PL is significantly induced in a time-dependent manner upon copper exposure even at sublethal dose, and it seems reasonable to support that protein carbonyl could be used as a biomarker to copper toxicity.
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Affiliation(s)
- Samuel David Raj Thatipaka
- Centre for Research, Dr. V.S. Krishna Government Degree College (A), Maddilapalem, Visakhapatnam, Andhra Pradesh, 530013, India.
| | - Rupa Vani Paila
- Centre for Research, Dr. V.S. Krishna Government Degree College (A), Maddilapalem, Visakhapatnam, Andhra Pradesh, 530013, India
| | - Suman Polaki
- Centre for Research, Dr. V.S. Krishna Government Degree College (A), Maddilapalem, Visakhapatnam, Andhra Pradesh, 530013, India
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Yang HZ, Wang L, He YJ, Jing WX, Ma WL, Chen CM, Wang L. Analysis of spectrometry and thermodynamics of the metallothionein in freshwater crab Sinopotamon henanense for its binding ability with different metals. CHEMOSPHERE 2020; 246:125670. [PMID: 31918077 DOI: 10.1016/j.chemosphere.2019.125670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 12/12/2019] [Accepted: 12/13/2019] [Indexed: 06/10/2023]
Abstract
The metal binding nature of heterologously expressed metallothionein of Sinopotamon henanense (ShMT) had been demonstrated previously. In this study, we analysed the stoichiometry of ShMT yielded in vivo and exchange reactions of the Zn-ShMT with Cd2+, Pb2+ and Cu2+in vitro via electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS), circular dichroism (CD) spectroscopy, inductively coupled plasma mass spectrometry (ICP-MS), and isothermal titration calorimetry (ITC). The results of ESI-TOF-MS analyses showed that metal-ShMT synthesized in vivo had three major forms, namely Zn15-, Cd9-, and Pb5-ShMT. The ITC analyses of exchange reactions demonstrated that Zn-ShMT exhibited up to 6, 6, and 7 binding sites for Cd2+, Pb2+ and Cu2+. By the analyses of the UV and CD spectra in the substitution experiments showed that the geometric structural stability of metal-ShMT could be influenced when excess of over 6, 6, or 7 equivalents of Cd2+, Pb2+, or Cu2+ were added into Zn-ShMT. Although both the reconstructed apo-ShMT and substituted Zn-ShMT with three metal ions fitted the same M6Ⅱ- and M7Ⅰ-ShMT binding models for divalent and monovalent metals, the differences in their thermodynamic data suggested that discrepancies exit in their physiological functions. These results suggested that ShMT yielded in vivo had a higher storage capability for Zn2+ and a uptake ability for Cd2+, and Zn-ShMT was more easy to release Zn2+ as well as to uptake Cd2+, Cu2+, or Pb2+. The results presented in this work will be very valuable to understand the function(s) of ShMT not only in a normal physiological condition but also in the presence of non-essential metals in crabs.
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Affiliation(s)
- Hui Zhen Yang
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, 030006, China
| | - Lu Wang
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, 030006, China
| | - Yong J He
- Agricultural Processing Institution, Shanxi Academy of Agricultural Sciences, Shanxi Province, China
| | - Wei X Jing
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, 030006, China
| | - Wen L Ma
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, 030006, China
| | - Chien M Chen
- Department of Environmental Resources Management, Chia Nan University of Pharmacy & Science, Taiwan.
| | - Lan Wang
- School of Life Science, Shanxi University, Taiyuan, Shanxi Province, 030006, China.
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Zhou H, Xu J, Wang W. Functional analysis of metallothionein MTT5 from
Tetrahymena thermophila. J Cell Biochem 2018; 119:3257-3266. [DOI: 10.1002/jcb.26482] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 10/31/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Huanxin Zhou
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of EducationInstitute of BiotechnologyShanxi UniversityTaiyuanChina
- School of Environment and SafetyTaiyuan University of Science and TechnologyTaiyuanChina
| | - Jing Xu
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of EducationInstitute of BiotechnologyShanxi UniversityTaiyuanChina
| | - Wei Wang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of EducationInstitute of BiotechnologyShanxi UniversityTaiyuanChina
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