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Yu D, Lan J, Khan NU, Li Q, Xu F, Huang G, Xu H, Huang F. The in vitro synergistic denaturation effect of heat and surfactant on photosystem I isolated from Arthrospira Platensis. PHOTOSYNTHESIS RESEARCH 2019; 141:229-243. [PMID: 30725234 DOI: 10.1007/s11120-019-00623-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 01/26/2019] [Indexed: 06/09/2023]
Abstract
Photosystem I (PSI) generates the most negative redox potential found in nature, and the performance of solar energy conversion into alternative energy sources in artificial systems highly depends on the thermal stability of PSI. Thus, understanding thermal denaturation is an important prerequisite for the use of PSI at elevated temperatures. To assess the thermal stability of surfactant-solubilized PSI from cyanobacteria Arthrospira Platensis, the synergistic denaturation effect of heat and surfactant was studied. At room temperature, surfactant n-dodecyl-β-D-maltoside solubilized PSI trimer gradually disassembles into PSI monomers and free pigments over long time. In the solubilizing process of PSI particles, surfactant can uncouple pigments of PSI, and the high concentration of surfactant causes the pigment to uncouple more; after the surfactant-solubilizing process, the uncoupling is relatively slow. During the heating process, changes were monitored by transmittance T800nm, ellipticity θ686nm and θ222nm, upon slow heating (1.5 °C per minute) of samples in Tris buffer (20 mM, pH 7.8) from 20 to 95 °C. The thermal denaturation of surfactant-solubilized PSI is a much more complicated process, which includes the uncoupling of pigments by surfactants, the disappearance of surrounding surfactants, and the unfolding of PSI α-helices. During the heating process, the uncoupling chlorophyll a (Chla) and converted pheophytin (Pheo) can form excitons of Chla-Pheo. The secondary structure α-helix of PSI proteins is stable up to 87-92 °C in the low-concentration surfactant solubilized PSI, and high-concentration surfactant and pigments uncoupling can accelerate the α-helical unfolding.
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Affiliation(s)
- Daoyong Yu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
| | - Jinxiao Lan
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Naseer Ullah Khan
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Quan Li
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Fengxi Xu
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Guihong Huang
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Hai Xu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
| | - Fang Huang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
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Cheng J, Li W, Tan G, Wang Z, Li S, Jin Y. Synthesis and in vitro photodynamic therapy of chlorin derivative 131-ortho-trifluoromethyl-phenylhydrazone modified pyropheophorbide-a. Biomed Pharmacother 2017; 87:263-273. [DOI: 10.1016/j.biopha.2016.12.081] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 12/05/2016] [Accepted: 12/19/2016] [Indexed: 12/22/2022] Open
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Harris BJ, Cheng X, Frymier P. Structure and Function of Photosystem I–[FeFe] Hydrogenase Protein Fusions: An All-Atom Molecular Dynamics Study. J Phys Chem B 2016; 120:599-609. [DOI: 10.1021/acs.jpcb.5b07812] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bradley J. Harris
- College
of Engineering and Computer Science, University of Tennessee, Chattanooga, Tennessee 37403, United States
| | - Xiaolin Cheng
- Center for
Molecular Biophysics, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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Cheng J, Tan G, Li W, Li J, Wang Z, Jin Y. Preparation, characterization and in vitro photodynamic therapy of a pyropheophorbide-a-conjugated Fe3O4 multifunctional magnetofluorescence photosensitizer. RSC Adv 2016. [DOI: 10.1039/c6ra03128e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Core–shell structure magneto-fluorescence chlorin pyropheorbide-a photosensitizer (MFNPs) with good water-dispersity and strong superparamagnetic for photodynamic therapy.
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Affiliation(s)
- Jianjun Cheng
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- College of Chemistry & Chemical Engineering
- Harbin Normal University
- Harbin
| | - Guanghui Tan
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- College of Chemistry & Chemical Engineering
- Harbin Normal University
- Harbin
| | - Wenting Li
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- College of Chemistry & Chemical Engineering
- Harbin Normal University
- Harbin
| | - Jinghua Li
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- College of Chemistry & Chemical Engineering
- Harbin Normal University
- Harbin
| | - Zhiqiang Wang
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- College of Chemistry & Chemical Engineering
- Harbin Normal University
- Harbin
| | - Yingxue Jin
- Key Laboratory for Photonic and Electronic Bandgap Materials
- Ministry of Education
- College of Chemistry & Chemical Engineering
- Harbin Normal University
- Harbin
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Yu D, Wang M, Zhu G, Ge B, Liu S, Huang F. Enhanced photocurrent production by bio-dyes of photosynthetic macromolecules on designed TiO2 film. Sci Rep 2015; 5:9375. [PMID: 25790735 PMCID: PMC4366820 DOI: 10.1038/srep09375] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Accepted: 03/02/2015] [Indexed: 11/19/2022] Open
Abstract
The macromolecular pigment-protein complex has the merit of high efficiency for light-energy capture and transfer after long-term photosynthetic evolution. Here bio-dyes of A. platensis photosystem I (PSI) and spinach light-harvesting complex II (LHCII) are spontaneously sensitized on three types of designed TiO2 films, to assess the effects of pigment-protein complex on the performance of bio-dye sensitized solar cells (SSC). Adsorption models of bio-dyes are proposed based on the 3D structures of PSI and LHCII, and the size of particles and inner pores in the TiO2 film. PSI shows its merit of high efficiency for captured energy transfer, charge separation and transfer in the electron transfer chain (ETC), and electron injection from FB to the TiO2 conducting band. After optimization, the best short current (JSC) and photoelectric conversion efficiency (η) of PSI-SSC and LHCII-SSC are 1.31 mA cm(-2) and 0.47%, and 1.51 mA cm(-2) and 0.52%, respectively. The potential for further improvement of this PSI based SSC is significant and could lead to better utilization of solar energy.
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Affiliation(s)
- Daoyong Yu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China
- Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao 266580, China
| | - Mengfei Wang
- Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao 266580, China
| | - Guoliang Zhu
- Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao 266580, China
| | - Baosheng Ge
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China
- Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao 266580, China
| | - Shuang Liu
- Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao 266580, China
| | - Fang Huang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China
- Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao 266580, China
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