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Dai S, Xie Z, Wang B, Ye R, Ou X, Wang C, Yu N, Huang C, Zhao J, Cai C, Zhang F, Buratto D, Khan T, Qiao Y, Hua Y, Zhou R, Tian B. An inorganic mineral-based protocell with prebiotic radiation fitness. Nat Commun 2023; 14:7699. [PMID: 38052788 DOI: 10.1038/s41467-023-43272-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 11/06/2023] [Indexed: 12/07/2023] Open
Abstract
Protocell fitness under extreme prebiotic conditions is critical in understanding the origin of life. However, little is known about protocell's survival and fitness under prebiotic radiations. Here we present a radioresistant protocell model based on assembly of two types of coacervate droplets, which are formed through interactions of inorganic polyphosphate (polyP) with divalent metal cation and cationic tripeptide, respectively. Among the coacervate droplets, only the polyP-Mn droplet is radiotolerant and provides strong protection for recruited proteins. The radiosensitive polyP-tripeptide droplet sequestered with both proteins and DNA could be encapsulated inside the polyP-Mn droplet, and form into a compartmentalized protocell. The protocell protects the inner nucleoid-like condensate through efficient reactive oxygen species' scavenging capacity of intracellular nonenzymic antioxidants including Mn-phosphate and Mn-peptide. Our results demonstrate a radioresistant protocell model with redox reaction system in response to ionizing radiation, which might enable the protocell fitness to prebiotic radiation on the primitive Earth preceding the emergence of enzyme-based fitness. This protocell might also provide applications in synthetic biology as bioreactor or drug delivery system.
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Affiliation(s)
- Shang Dai
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China
- Shanghai Institute for Advanced Study of Zhejiang University, Shanghai, China
| | - Zhenming Xie
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Binqiang Wang
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Rui Ye
- School of Physics, Institute of Quantitative Biology, Zhejiang University, Hangzhou, China
| | - Xinwen Ou
- School of Physics, Institute of Quantitative Biology, Zhejiang University, Hangzhou, China
| | - Chen Wang
- College of Pharmaceutical Science, Zhejiang University, Hangzhou, China
| | - Ning Yu
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Cheng Huang
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Jie Zhao
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Chunhui Cai
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Furong Zhang
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Damiano Buratto
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China
- School of Physics, Institute of Quantitative Biology, Zhejiang University, Hangzhou, China
| | - Taimoor Khan
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China
- School of Physics, Institute of Quantitative Biology, Zhejiang University, Hangzhou, China
| | - Yan Qiao
- Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.
| | - Yuejin Hua
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China.
- Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo, China.
- Cancer Center, Zhejiang University, Hangzhou, China.
| | - Ruhong Zhou
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China.
- Shanghai Institute for Advanced Study of Zhejiang University, Shanghai, China.
- School of Physics, Institute of Quantitative Biology, Zhejiang University, Hangzhou, China.
- Cancer Center, Zhejiang University, Hangzhou, China.
| | - Bing Tian
- Institute of Biophysics, College of Life Sciences, Zhejiang University, Hangzhou, China.
- Cancer Center, Zhejiang University, Hangzhou, China.
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Ovechkin AS, Kartsova LA. Methods for the detection and determination of singlet oxygen. JOURNAL OF ANALYTICAL CHEMISTRY 2014. [DOI: 10.1134/s1061934815010116] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Mei P, Zhang YZ, Zhang XP, Yan CX, Zhang H, Liu Y. Spectroscopic investigation of the interaction between copper (II) 2-oxo-propionic acid salicyloyl hydrazone complex and bovine serum albumin. Biol Trace Elem Res 2008; 124:269-82. [PMID: 18478191 DOI: 10.1007/s12011-008-8147-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2008] [Accepted: 04/17/2008] [Indexed: 10/22/2022]
Abstract
The interaction between copper (II) 2-oxo-propionic acid salicyloyl hydrazone (Cu(II)L) and bovine serum albumin (BSA) under physiological conditions was investigated by the methods of fluorescence spectroscopy, UV-Vis absorption, and circular dichroism spectroscopy. Fluorescence data showed that the fluorescence quenching of BSA by Cu(II)L was the result of the formation of the BSA-Cu(II)L complex. The apparent binding constants (K (a)) between Cu(II)L and BSA at four different temperatures were obtained according to the modified Stern-Volmer equation. The thermodynamic parameters, enthalpy change (DeltaH) and entropy change (DeltaS), for the reaction were calculated to be -80.79 kJ mol(-1) and -175.48 J mol(-1) K(-1) according to van't Hoff equation. The results indicated that van der Waals force and hydrogen bonds were the dominant intermolecular force in stabilizing the complex. The binding distance (r) between Cu(II)L and the tryptophan residue of BSA was obtained to be 4.1 nm according to Förster's nonradioactive energy transfer theory. The conformational investigation showed that the application of Cu(II)L increased the hydrophobicity of amino acid residues and decreased the alpha-helical content of BSA (from 62.71% to 37.31%), which confirmed some microenvironmental and conformational changes of BSA molecules.
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Affiliation(s)
- Ping Mei
- Department of Chemistry, College of Chemistry and Environmental Engineering, Yangtze University, Hubei, 434023, People's Republic of China
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Company R, Serafim A, Cosson RP, Fiala-Médioni A, Camus L, Colaço A, Serrão-Santos R, Bebianno MJ. Antioxidant biochemical responses to long-term copper exposure in Bathymodiolus azoricus from Menez-Gwen hydrothermal vent. THE SCIENCE OF THE TOTAL ENVIRONMENT 2008; 389:407-17. [PMID: 17904200 DOI: 10.1016/j.scitotenv.2007.08.056] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2007] [Revised: 06/15/2007] [Accepted: 08/31/2007] [Indexed: 05/17/2023]
Abstract
Copper (Cu) is essential to various physiological processes in marine organisms. However, at high concentrations this redox-active transition metal may enhance the formation of reactive oxygen species (ROS) and subsequently initiate oxidative damage. High concentrations of Cu may increase oxidative damage to lipids, proteins and DNA. Bathymodiolus azoricus is a Mytilid bivalve very common in hydrothermal environments near the Azores Triple Junction continuously exposed to high metal concentrations, including Cu, emanating from the vent fluids. The knowledge of antioxidant defence system and other stress related biomarkers in these organisms is still scarce. The aim of this work was to study the effect of Cu (25 microg l(-1); 24 days exposure; 6 days depuration) on the antioxidant stress biomarkers in the gills and mantle of B. azoricus. The expression of stress related biomarkers was tissue-dependent and results suggest that other factors than metal exposure may influence stress biomarkers, since little variation in antioxidant enzymes activities, MT concentrations, LPO and total oxyradical scavenging capacity (TOSC) occurred in both control and Cu-exposed mussels. Moreover, there is a general tendency for these parameters to increase with time, in both control and Cu-exposed mussels, suggesting that reactive oxygen species (ROS) formation is not metal dependent, and may be related with poor physiological conditions of the animals after long periods in adverse conditions compared to those in hydrothermal environments.
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Affiliation(s)
- Rui Company
- CIMA, Faculty of Marine and Environmental Sciences, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal.
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Davis CH, Deerfield D, Wymore T, Stafford DW, Pedersen LG. A quantum chemical study of the mechanism of action of Vitamin K carboxylase (VKC). J Mol Graph Model 2007; 26:409-14. [PMID: 17182265 DOI: 10.1016/j.jmgm.2006.10.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2006] [Accepted: 10/24/2006] [Indexed: 10/23/2022]
Abstract
A reaction path including transition states is generated for the Dowd mechanism [P. Dowd, R. Hershlne, S.W. Ham, S. Naganathan. Vitamin K and energy transduction: a base strength amplification mechanism. Science 269 (2005) 1684-1691] of action for Vitamin K carboxylase (VKC) using quantum chemical methods (B3LYP/6-311G**). VKC, an essential enzyme in mammalian systems, catalyzes the conversion of hydroquinone form of Vitamin K to the epoxide form in the presence of oxygen. An intermediate species of the oxidation of Vitamin K, an alkoxide, acts apparently to abstract the gamma hydrogen from specifically located glutamate residues. We are able to follow the Dowd proposed path to generate this alkoxide species. The geometries of the proposed model intermediates and transition states in the mechanism are energy optimized. We find that the most energetic step in the mechanism is the uni-deprotonation of the hydroquinone - once this occurs, there is only a small barrier of 3.5kcal/mol for the interaction of oxygen with the carbon to be attacked - and then the reaction proceeds downhill in free energy to form the critical alkoxide species. The results are consistent with the idea that the enzyme probably acts to facilitate the formation of the epoxide by reducing the energy required to deprotonate the hydroquinone form.
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Affiliation(s)
- Charles H Davis
- Department of Biochemistry and Biophysics, UNC-CH, Chapel Hill, 27599, United States
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Abstract
Reactive oxygen species (ROS) are formed enzymatically, chemically, photochemically, and by irradiation of food. They are also formed by the decomposition and the inter-reactions of ROS. Hydroxy radical is the most reactive ROS, followed by singlet oxygen. Reactions of ROS with food components produce undesirable volatile compounds and carcinogens, destroy essential nutrients, and change the functionalities of proteins, lipids, and carbohydrates. Lipid oxidation by ROS produces low molecular volatile aldehydes, alcohols, and hydrocarbons. ROS causes crosslink or cleavage of proteins and produces low molecular carbonyls from carbohydrates. Vitamins are easily oxidized by ROS, especially singlet oxygen. The singlet oxygen reaction rate was the highest in ss-carotene, followed by tocopherol, riboflavin, vitamin D, and ascorbic acid.
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Affiliation(s)
- Eunok Choe
- Department of Food Science and Technology, The Ohio State University, 2015 Fyffe Court, Columbus, OH, 43210, USA
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Lavi R, Sinyakov M, Samuni A, Shatz S, Friedmann H, Shainberg A, Breitbart H, Lubart R. ESR detection of 1O2 reveals enhanced redox activity in illuminated cell cultures. Free Radic Res 2005; 38:893-902. [PMID: 15621706 DOI: 10.1080/1071576010001642646] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Low-energy visible light (LEVL) has previously been found to modulate various processes in different biological systems. One explanation for the stimulatory effect of LEVL is light-induced reactive oxygen species formation. In the present study, both sperm and skin cells were illuminated with LEVL and were found to generate singlet oxygen (1O2). The detection of 1O2 was performed using a trapping probe, 2,2,6,6-tetramethyl-4-piperidone, coupled with electron paramagnetic resonance spectroscopy. In addition, we have shown that, together with O2 generation, LEVL illumination increases the reductive capacity of the cells, which explains the difficulties encountered in 1O2 detection. The potential of visible light to change the cellular redox state may explain the recently observed biostimulative effects exerted by LEVL.
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Affiliation(s)
- Ronit Lavi
- Department of Chemistry, Bar-ilan University, Ramat-Gan, Israel
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Moraleda-Muñoz A, Pérez J, Fontes M, Murillo FJ, Muñoz-Dorado J. Copper induction of carotenoid synthesis in the bacterium Myxococcus xanthus. Mol Microbiol 2005; 56:1159-68. [PMID: 15882411 DOI: 10.1111/j.1365-2958.2005.04613.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Copper induces a red pigmentation in cells of the bacterium Myxococcus xanthus when they are incubated in the dark, at suboptimal growth conditions. The colouration results from the accumulation of carotenoids, as demonstrated by chemical analysis, and by the lack of a copper effect on M. xanthus mutants affected in known structural genes for carotenoid synthesis. None of several other metals or oxidative agents can mimic the copper effect on carotenoid synthesis. Until now, blue light was the only environmental agent known to induce carotenogenesis in M. xanthus. As happens for the blue light, copper activates the transcription of the structural genes for carotenoid synthesis through the transcriptional activation of the carQRS operon. This encodes the ECF sigma factor CarQ, directly or indirectly responsible for the activation of the structural genes, and the anti-sigma factor CarR, which physically interacts with CarQ to blocks its action in the absence of external stimuli. All but one of the other regulatory elements known to participate in the induction of carotenoid synthesis by blue light are required for the response to copper. The exception is CarF, a protein required for the light-mediated dismantling of the CarR-CarQ complex. In addition to carotenogenesis, copper induces other unknown cellular mechanisms that confer tolerance to the metal.
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Affiliation(s)
- Aurelio Moraleda-Muñoz
- Departamento de Microbiología, Instituto de Biotecnología, Facultad de Ciencias, Universidad de Granada, Avda, Fuentenueva s/n, E-18071 Granada, Spain
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Lee J, Koo N, Min DB. Reactive Oxygen Species, Aging, and Antioxidative Nutraceuticals. Compr Rev Food Sci Food Saf 2004; 3:21-33. [PMID: 33430557 DOI: 10.1111/j.1541-4337.2004.tb00058.x] [Citation(s) in RCA: 413] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The important roles of reactive oxygen species in diseases related to aging and the necessity and benefits of antioxidative nutraceuticals in the prevention of diseases and promotion of healthy aging have been extensively reported in recent years. Oxygen is an essential component of living organisms. The generation of reactive oxygen species such as superoxide anion, hydrogen peroxide, hydroxyl radicals, and singlet oxygen is inevitable in aerobic metabolism of the body. Reactive oxygen species cause lipid oxidation, protein oxidation, DNA strand break and base modification, and modulation of gene expression. In the past several years, unprecedented progress has been made in the recognition and understanding of roles of reactive oxygen species in many diseases. These include atherosclerosis, vasospasms, cancers, trauma, stroke, asthma, hyperoxia, arthritis, heart attack, age pigments, dermatitis, cataractogenesis, retinal damage, hepatitis, liver injury, and periodontis, which are age-related. The body protects itself from the potential damages of reactive oxygen species. Its first line of defense is superoxide dismutases, glutathione peroxidases, and catalase. Scientists have indicated that antioxidant nutraceuticals supplied from daily diets quench the reactive oxygen species or are required as cofactors for antioxidant enzymes. Nutraceuticals play significant roles in the prevention of a number of age-related diseases and are essential for healthy aging. Epidemiological studies also reported the relevance of antioxidative nutraceuticals to health issues and the prevention of age-related diseases. Health-conscious consumers have made antioxidative nutraceuticals the leading trend in the food industry worldwide in recent years.
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Affiliation(s)
- J Lee
- Author Lee is currently with the Dept. of Food Science and Technology, Seoul National Univ. of Technology, Seoul, Korea
| | - N Koo
- Author Koo is currently with the Dept. of Food and Nutrition, DaeJeon Univ., DaeJeon, Korea
| | - D B Min
- Author Min is with the Dept. of Food Science and Technology, The Ohio State Univ., 2015 Fyffe Road, Columbus, OH 43210
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Hirahara Y, Okuno T, Ueno H, Nakamuro K. Photooxidation Mechanism of Fenthion by Singlet Oxygen: Evidence by ESR Analysis with a Selective Spin Trapping Agent. ACTA ACUST UNITED AC 2003. [DOI: 10.1248/jhs.49.34] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yoshichika Hirahara
- Kobe Quarantine Station, Center for Inspection of Imported Foods and Infectious Diseases
- Faculty of Pharmaceutical Sciences, Setsunan University
| | | | - Hitoshi Ueno
- Faculty of Pharmaceutical Sciences, Setsunan University
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