1
|
Kimura H, Nagasato N, Kato N, Kojima M, Enomoto C, Nakata E, Takashima H. Photophysical and elecron-transfer reaction properties of tris(2,2’-bipyridine)ruthenium(II)-based inhibitors that covalently bound to the active site of chymotrypsin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2021. [DOI: 10.1016/j.jpap.2021.100027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
2
|
From photosynthesis to photocatalysis: Dual catalytic oxidation/reduction in one system. Proc Natl Acad Sci U S A 2020; 117:8672-8673. [PMID: 32277026 DOI: 10.1073/pnas.2003512117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
|
3
|
Tsuruta K, Haraguchi R, Nishiyama K, Sawaguchi T, Yoshimoto S. Electrochemical Condensation of Methylviologen on Specifically‐adsorbed Anion Layers. ELECTROANAL 2019. [DOI: 10.1002/elan.201900094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Keisuke Tsuruta
- Graduate School of Science and TechnologyKumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| | - Ryusei Haraguchi
- Graduate School of Science and TechnologyKumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| | - Katsuhiko Nishiyama
- Division of Materials Science & ChemistryFaculty of Advanced Science & TechnologyKumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| | - Takahiro Sawaguchi
- National Institute of Advanced Industrial Science and Technology Central 6, 1–1-1 Higashi, Tsukuba Ibaraki 305-8566 Japan
| | - Soichiro Yoshimoto
- Division of Materials Science & ChemistryFaculty of Advanced Science & TechnologyKumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| |
Collapse
|
4
|
Suwa M, Imamura N, Awano P, Nakata E, Takashima H. Photoinduced electron-transfer reactions of tris(2,2′-bipyridine)ruthenium(II)-based carbonic anhydrase inhibitors tethering plural binding sites. J PHYS ORG CHEM 2018. [DOI: 10.1002/poc.3848] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mikiko Suwa
- Department of Chemistry, Faculty of Science; Nara Women's University; Nara Japan
| | - Narumi Imamura
- Department of Chemistry, Faculty of Science; Nara Women's University; Nara Japan
| | - Pirika Awano
- Department of Chemistry, Faculty of Science; Nara Women's University; Nara Japan
| | - Eiji Nakata
- Institute of Advanced Energy; Kyoto University; Kyoto Japan
| | - Hiroshi Takashima
- Department of Chemistry, Faculty of Science; Nara Women's University; Nara Japan
| |
Collapse
|
5
|
Bruns CJ, Liu H, Francis MB. Near-Quantitative Aqueous Synthesis of Rotaxanes via Bioconjugation to Oligopeptides and Proteins. J Am Chem Soc 2016; 138:15307-15310. [PMID: 27933926 DOI: 10.1021/jacs.6b10231] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In spite of widespread interest in rotaxane-based molecular machines and materials, rotaxanes have not been attached covalently to proteins. We describe the near-quantitative aqueous synthesis of [2]rotaxanes based on neutral and charged aqueous hosts-cucurbit[7]uril (CB7) and cyclobis(paraquat-p-phenylene) (CBPQT4+), respectively-using the thiol-ene addition of cysteine and maleimide as a stoppering protocol. After verifying the high efficiency of the reaction using glutathione (GSH) as an oligopeptide stopper, we have employed cytochrome C (CytC) as a protein stopper to produce the first well-characterized protein-rotaxane bioconjugates. We anticipate that this methodology will enable the preparation of novel materials that combine the unique properties of proteins and mechanical bonds.
Collapse
Affiliation(s)
| | | | - Matthew B Francis
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| |
Collapse
|
6
|
Takashima H, Fukuda M, Nakagaki F, Ogata T, Tsukahara K. Photoinduced Electron-Transfer Reactions of Carbonic Anhydrase Inhibitor Containing Tris(2,2′-bipyridine)ruthenium(II) Analogue. J Phys Chem B 2013; 117:2625-35. [DOI: 10.1021/jp310604w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Hiroshi Takashima
- Department of Chemistry, Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| | - Misa Fukuda
- Department of Chemistry, Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| | - Fumie Nakagaki
- Department of Chemistry, Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| | - Tomoko Ogata
- Department of Chemistry, Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| | - Keiichi Tsukahara
- Department of Chemistry, Faculty of Science, Nara Women’s University, Nara 630-8506, Japan
| |
Collapse
|
7
|
Chang CH, Hu YT, Lo CF, Luo L, Lin HM, Chang CH, Lin CY, Diau EWG, Wu TK. Photoactivation studies of zinc porphyrin-myoglobin system and its application for light-chemical energy conversion. Int J Biol Sci 2011; 7:1203-13. [PMID: 22043177 PMCID: PMC3204410 DOI: 10.7150/ijbs.7.1203] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 09/07/2011] [Indexed: 12/02/2022] Open
Abstract
An artificial zinc porphyrin-myoglobin-based photo-chemical energy conversion system, consisting of ZnPP-Mb or ZnPE1-Mb as a photosensitizer, NADP+ as an electron acceptor, and triethanolamine as an electron donor, has been constructed to mimic photosystem I. The photoirradiated product is able to reduce a single-electron acceptor protein cytochrome c, but cannot catalyze the two-electron reduction of acetaldehyde by alcohol dehydrogenase, thus demonstrating a single electron transfer mechanism. Furthermore, the artificial system can bifunctionally promote oxidoredox reactions, depending on the presence or absence of a sacrificial electron donor, thus suggesting its potential application in electrochemical regeneration steps involved in chemical transformation and/or energy conversion.
Collapse
Affiliation(s)
- Chin-Hao Chang
- Department of Biological Science and Technology, National Chiao Tung University, Hsin-Chu, Taiwan, Republic of China
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Takashima H, Kitano M, Hirai C, Murakami H, Tsukahara K. Photophysical and DNA-binding properties of cytochrome c modified with a platinum(II) complex. J Phys Chem B 2011; 114:13889-96. [PMID: 20936831 DOI: 10.1021/jp106121n] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cytochrome c (cyt c) derivatives modified with a platinum(II) complex at the lysine residue, cyt c(III)-[Pt(bpy)(dapap)](1) {bpy = 2,2'-bipyridine, and dapap = 3-(2,3-diaminopropionylamino)propionic acid}, have been prepared. The modified residues are Lys8, Lys13, Lys55, Lys60, Lys73, and Lys88. In the case of the cyt c(III)-[Pt(bpy)(dapap)](1) dyad, the photoexcited singlet state of (1)([Pt(bpy)(dapap)](1))* was quenched by the heme Fe(III) moiety through the intramolecular photoinduced energy-transfer reaction via a through-space mechanism. Next, in the presence of calf thymus (CT)-DNA, the DNA-responsive fluorescence properties of cyt c(III)-[Pt(bpy)(dapap)](1) isomers were investigated. The order of the obtained binding constants between the cyt c(III)-[Pt(bpy)(dapap)](1) isomer and CT-DNA in an aqueous solution suggested that the electrostatic interaction is one of the important factors to stabilize the cyt c-DNA complex. Finally, we discussed the rotational motion of the [Pt(bpy)(dapap)](2+) moiety at the surface of cyt c by fluorescence anisotropy measurement. The increase in the anisotropy parameter, r, for each cyt c isomer clearly revealed that the noncovalent recognition of the [Pt(bpy)(dapap)](2+) moiety by CT-DNA is an essential event in the formation of the cyt c-DNA complex and generation of DNA-sensitive fluorescence signals.
Collapse
Affiliation(s)
- Hiroshi Takashima
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara, 630-8506 Japan.
| | | | | | | | | |
Collapse
|
9
|
Tsukiji S, Hamachi I. Semisynthetic Hemoproteins Using Cofactor Engineering: Toward Supramolecular Protein-based Photosynthetic System. Supramol Chem 2010. [DOI: 10.1080/10610270290026031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Shinya Tsukiji
- a Department of Chemistry and Biochemistry, Graduate School of Engineering , Kyushu University , Fukuoka , 812-8581 , Japan
| | - Itaru Hamachi
- b Institute for Fundamental Research of Organic Chemistry (IFOC) , Kyushu University , Fukuoka , 812-8581 , Japan
| |
Collapse
|
10
|
Takashima H, Kawahara H, Kitano M, Shibata S, Murakami H, Tsukahara K. Metal ion-dependent fluorescent dynamics of photoexcited zinc-porphyrin and zinc-myoglobin modified with ethylenediaminetetraacetic acid. J Phys Chem B 2009; 112:15493-502. [PMID: 18991435 DOI: 10.1021/jp807692w] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reconstituted zinc-myoglobin (ZnMb) dyads, ZnMb-[M(II)(edta)], have been prepared by incorporating a zinc-porphyrin (ZnP) cofactor modified with ethylenediaminetetraacetic acid (H(4)edta) into apo-Mb. In case of the monomeric ZnP(edta) cofactor coordinated by one pyridine molecule, ZnP(py)(edta), a spontaneous 1:1 complex with a transient metal ion was formed in an aqueous solvent, and the photoexcited singlet state of ZnP, (1)(ZnP)*, was quenched by the [Cu(II)(edta)] moiety through intramolecular photoinduced electron-transfer (ET) reaction. The rate constant for the intramolecular quenching ET (k(q)) at 25 degrees C was successfully obtained as k(q) = 5.1 x 10(9) s(-1). In the case of Co(2+), Ni(2+), and Mn(2+), intersystem crossing by paramagnetic effect was mainly considered between (1)(ZnP)* and the [M(II)(edta)] complex. For the ZnMb-[M(II)(edta)] systems, the intramolecular ET reaction between the excited singlet state of (1)(ZnMb)* and the [Cu(II)(edta)] moieties provided the slower quenching rate constant, k(q) = 2.1 x 10(8) s(-1), compared with that of the ZnP(py)(edta) one. Kinetic studies also presented the efficient fluorescence quenching of the (1)(ZnMb)*-[Co(II)(edta)] dyad. Our study clearly demonstrates that wrapping of the ZnP cofactor by the apoprotein matrix and synthetic manipulation at the Mb surface ensure metal ion-sensitive fluorescent dynamics of ZnMb and provides valuable information to elucidate the complicated mechanism of the biological photoinduced ET reactions of hemoproteins.
Collapse
Affiliation(s)
- Hiroshi Takashima
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara, 630-8506 Japan.
| | | | | | | | | | | |
Collapse
|
11
|
Faiz JA, Heitz V, Sauvage JP. Design and synthesis of porphyrin-containing catenanes and rotaxanes. Chem Soc Rev 2008; 38:422-42. [PMID: 19169458 DOI: 10.1039/b710908n] [Citation(s) in RCA: 216] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catenanes and rotaxanes containing porphyrin subunits have become popular synthetic targets because of the large variety of available synthetic strategies including the coordination chemistry of metallated porphyrins, coupled with the many attractive physical properties of porphyrins. This tutorial review outlines various synthetic approaches and templating strategies that have been used to prepare a range of mechanically interlocked architectures that incorporate porphyrins as fundamental subunits either grafted onto macrocycles or as stoppers. These species are of interest in relation to recreating natural processes such as the photosynthetic apparatus or enzyme binding sites.
Collapse
Affiliation(s)
- Jonathan A Faiz
- Laboratoire de Chimie Organo-Minérale, LC 3, UMR 7177 du CNRS, Université Louis Pasteur, Faculté de Chimie, 4 rue Blaise Pascal, 67070 Strasbourg Cedex, France
| | | | | |
Collapse
|
12
|
Takashima H, Fujimoto E, Hirai C, Tsukahara K. Synthesis and Spectroscopic Properties of Reconstituted ZincMyoglobin Appending a DNA-Binding Platinum(II) Complex. Chem Biodivers 2008; 5:2101-2112. [DOI: 10.1002/cbdv.200890191] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
13
|
Abstract
Energy is the most important issue of the 21st century. About 85% of our energy comes from fossil fuels, a finite resource unevenly distributed beneath the Earth's surface. Reserves of fossil fuels are progressively decreasing, and their continued use produces harmful effects such as pollution that threatens human health and greenhouse gases associated with global warming. Prompt global action to solve the energy crisis is therefore needed. To pursue such an action, we are urged to save energy and to use energy in more efficient ways, but we are also forced to find alternative energy sources, the most convenient of which is solar energy for several reasons. The sun continuously provides the Earth with a huge amount of energy, fairly distributed all over the world. Its enormous potential as a clean, abundant, and economical energy source, however, cannot be exploited unless it is converted into useful forms of energy. This Review starts with a brief description of the mechanism at the basis of the natural photosynthesis and, then, reports the results obtained so far in the field of photochemical conversion of solar energy. The "grand challenge" for chemists is to find a convenient means for artificial conversion of solar energy into fuels. If chemists succeed to create an artificial photosynthetic process, "... life and civilization will continue as long as the sun shines!", as the Italian scientist Giacomo Ciamician forecast almost one hundred years ago.
Collapse
Affiliation(s)
- Vincenzo Balzani
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, Via Selmi 2 40126 Bologna, Italy.
| | | | | |
Collapse
|
14
|
Synthesis and photophysical properties of zinc myoglobin appending an ethidium ion as a DNA intercalator. J Biol Inorg Chem 2007; 13:171-81. [DOI: 10.1007/s00775-007-0309-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2007] [Accepted: 09/29/2007] [Indexed: 10/22/2022]
|
15
|
Nakata E, Tsukiji S, Hamachi I. Development of New Methods to Introduce Unnatural Functional Molecules into Native Proteins for Protein Engineering. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.1268] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
16
|
Boerakker MJ, Botterhuis NE, Bomans PHH, Frederik PM, Meijer EM, Nolte RJM, Sommerdijk NAJM. Aggregation Behavior of Giant Amphiphiles Prepared by Cofactor Reconstitution. Chemistry 2006; 12:6071-80. [PMID: 16688714 DOI: 10.1002/chem.200600089] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We report on biohybrid surfactants, termed "giant amphiphiles", in which a protein or an enzyme acts as the polar head group and a synthetic polymer as the apolar tail. It is demonstrated that the modification of horseradish peroxidase (HRP) and myoglobin (Mb) with an apolar polymer chain through the cofactor reconstitution method yields giant amphiphiles that form spherical aggregates (vesicles) in aqueous solution. Both HRP and Mb retain their original functionality when modified with a single polystyrene chain, but reconstitution has an effect on their activities. In the case of HRP the enzymatic activity decreases and for Mb the stability of the dioxygen myoglobin (oxy-Mb) complex is reduced, which is probably the result of a disturbed binding of the heme in the apo-protein or a reduced access of the substrate to the active site of the enzyme or protein.
Collapse
Affiliation(s)
- Mark J Boerakker
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
17
|
Theoretical modelling of photoactive molecular systems: insights using the Density Functional Theory. CR CHIM 2006. [DOI: 10.1016/j.crci.2005.03.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Sakamoto S, Kudo K. Design and Synthesis of Semi-Artificial Myoglobin Possessing DNA-Binding Peptides on Heme Propionates. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2005. [DOI: 10.1246/bcsj.78.1749] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
19
|
Justin Thomas KR, Thompson AL, Sivakumar AV, Bardeen CJ, Thayumanavan S. Energy and Electron Transfer in Bifunctional Non-Conjugated Dendrimers. J Am Chem Soc 2004; 127:373-83. [PMID: 15631488 DOI: 10.1021/ja044778m] [Citation(s) in RCA: 128] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Nonconjugated dendrimers, which are capable of funneling energy from the periphery to the core followed by a charge-transfer process from the core to the periphery, have been synthesized. The energy and electron donors involve a diarylaminopyrene unit and are incorporated at the periphery of these dendrimers. The energy and electron acceptor is at the core of the dendrimer, which involves a chromophore based on a benzthiadiazole moiety. The backbone of the dendrimers is benzyl ether based. A direct electron-transfer quenching of the excited state of the periphery or a sequential energy transfer-electron-transfer pathway are the two limiting mechanisms of the observed photophysical properties. We find that the latter mechanism is prevalent in these dendrimers. The energy transfer occurs on a picosecond time scale, while the charge-transfer process occurs on a nanosecond time scale. The lifetime of the charge separated species was found to be in the range of microseconds. Energy transfer efficiencies ranging from 80% to 90% were determined using both steady-state and time-resolved measurements, while charge-transfer efficiencies ranging from 70% to 80% were deduced from fluorescence quenching of the core chromophore. The dependence of the energy and charge-transfer processes on dendrimer generation is analyzed in terms of the backfolding of the flexible benzyl ether backbone, which leads to a weaker dependence of the energy and charge-transfer efficiencies on dendrimer size than would be expected for a rigid system.
Collapse
Affiliation(s)
- K R Justin Thomas
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | | | | | | | | |
Collapse
|
20
|
Sakamoto S, Itoh A, Kudo K. Artificial Assembly of Myoglobin and Flavodoxin Reductase Using Designed Coiled-coil Peptides. CHEM LETT 2004. [DOI: 10.1246/cl.2004.1202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
21
|
Lee B, Takeda S, Nakajima K, Noh J, Choi J, Hara M, Nagamune T. Rectified photocurrent in a protein based molecular photo-diode consisting of a cytochrome b562-green fluorescent protein chimera self-assembled monolayer. Biosens Bioelectron 2004; 19:1169-74. [PMID: 15046747 DOI: 10.1016/j.bios.2003.11.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2003] [Revised: 10/17/2003] [Accepted: 11/06/2003] [Indexed: 11/18/2022]
Abstract
We fabricated a self-assembled monolayer (SAM) of a chimeric protein created as a novel model protein for an artificial light-harvesting complex (LHC) composed of two proteins, cytochrome b(562) (cytb(562)) mutated for SAM fabrication (cytb(562), N22C, G82C) and enhanced green fluorescent protein (EGFP). The SAM formation of chimeric protein on a single-crystalline Au(111) substrate was confirmed by atomic force microscopy (AFM) measurement. The rectified photocurrent of the chimeric protein SAM on a gold substrate was detected by light-illumination scanning tunneling microscopy (LI-STM) co-operated with a lock-in technique. The photocurrent generation of the chimeric protein SAM was wavelength-specific to the light-illumination (488 nm), which indicated that the EGFP part of the chimera plays a role as a sensitizer in the photo-induced electron transfer process.
Collapse
Affiliation(s)
- Bumhwan Lee
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | | | | | | | | | | | | |
Collapse
|
22
|
Abstract
The design of redox-active metalloproteins has been approached from two different directions. The de novo design approach has recently reached an important stage, at which structural information on several different designed metalloproteins has been obtained. This new information highlights the real challenge of this approach. The alternative approach involving re-engineering of evolved proteins has also made significant advances recently.
Collapse
Affiliation(s)
- Paul D Barker
- University of Cambridge, Chemical Laboratory and Centre for Protein Engineering, Lensfield Road, Cambridge CB2 1EW, UK.
| |
Collapse
|
23
|
Yagi S, Ezoe M, Yonekura I, Takagishi T, Nakazumi H. Diarylurea-linked zinc porphyrin dimer as a dual-mode artificial receptor: supramolecular control of complexation-facilitated photoinduced electron transfer. J Am Chem Soc 2003; 125:4068-9. [PMID: 12670226 DOI: 10.1021/ja0294717] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel porphyrinic receptor 1 in which two zinc porphyrins are bridged by two diarylurea linkers was developed for recognition of a viologen derivative (hexyl viologen, HV). The electronic absorption spectra as well as the 1H NMR experiments revealed that the HV molecule was bound to the cleft in 1 mainly through carbonyl dipole-charge interactions to afford a 1:1 complex. From the steady-state fluorescence spectroscopic study, the photoinduced electron transfer (PET) from 1 to HV was extremely facilitated by the receptor-substrate complexation. The receptor 1 also formed a 1:1 complex with 1,4-diazabicyclo[2.2.2]octane (DABCO) through two Zn-N coordination interactions, and, using DABCO as an inhibitor, we suppressed the PET reaction via the substrate exchange.
Collapse
Affiliation(s)
- Shigeyuki Yagi
- Department of Applied Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan.
| | | | | | | | | |
Collapse
|
24
|
TAKASHIMA H, HU YZ, SANO K, SHINKAI S, OISHI S, HAMACHI I. Supramolecular Construction of Covalently and Noncovalently-linked Photoinduced Electron Transfer Systems in Myoglobin Scaffold. ELECTROCHEMISTRY 2001. [DOI: 10.5796/electrochemistry.69.942] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Hiroshi TAKASHIMA
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
| | - Yi-Zhen HU
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
| | - Katsuhiko SANO
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
| | - Seiji SHINKAI
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
| | - Shigero OISHI
- Department of Chemistry, School of Science, Kitasato University
| | - Itaru HAMACHI
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
| |
Collapse
|
25
|
Takeda S, Kamiya N, Arai R, Nagamune T. Design of an artificial light-harvesting unit by protein engineering: cytochrome b(562)-green fluorescent Protein chimera. Biochem Biophys Res Commun 2001; 289:299-304. [PMID: 11708816 DOI: 10.1006/bbrc.2001.5966] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We have generated a novel model protein for an artificial light-harvesting complex composed of two proteins, cytochrome b(562) (cytb(562)) and enhanced green fluorescent protein (EGFP), in which two chromophores are fixed in each protein matrix. Cytb(562) was appended to the N-terminus of EGFP via a Gly-Ser linker and the resultant fusion protein was successfully expressed in Escherichia coli as a mixture of the apo- and the holo-forms as to the cytb(562) moiety. The fluorescence of EGFP was substantially quenched when the apo-form was reconstituted with hemin. Based on the fluorescence lifetime measurements, it appeared that light energy entrapped by EGFP is transferred to the heme of cytb(562) by resonance energy transfer (energy transfer yield: 65%). Spatial organization of two chromophores using small and stable protein matrices will be promising toward the construction of an artificial light-harvesting complex by protein engineering.
Collapse
Affiliation(s)
- S Takeda
- Department of Chemistry and Biotechnology, Graduate School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | | | | | | |
Collapse
|
26
|
Sakamoto M, Ueno A, Mihara H. Multipeptide-metalloporphyrin assembly on a dendrimer template and photoinduced electron transfer based on the dendrimer structure. Chemistry 2001; 7:2449-58. [PMID: 11446647 DOI: 10.1002/1521-3765(20010601)7:11<2449::aid-chem24490>3.0.co;2-a] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
To construct an artificial photosynthetic system, peptide dendrimers [n-(X-HLY)PAMAMs: X = R, E; Y= L, F; n=4, 8, 16, 32 and 64 segments], in which amphiphilic alpha-helix peptides (X-HLY: R-HLL, E-HLL and R-HLF) were introduced at the end groups of polyamidoamine dendrimers (PAMAMs), were designed and synthesized. The peptide dendrimers 64-(X-HLY)PAMAMs are novel synthetic biopolymers with an enormous molecular weight, about 160 kDa, and with a regulated amino acid sequence and three-dimensional conformation. The peptide dendrimers bound Fe(III)- or Zn(II)-mesoporphyrin IX per two alpha-helices; this afforded a multimetalloporphyrin assembly similar to the natural light-harvesting antennae in photosynthetic bacteria. Circular dichroism studies and peroxidase activity measurements revealed that metalloporphyrins were coordinated to the peptide dendrimers in a regulated manner and packed more densely with the growth of the dendrimer generation. Fluorescence quenching and photoreduction studies with methylviologen demonstrated that the photoinduced electron-transfer function with the peptide dendrimer-multi-Zn-MP was accomplished more effectively as the dendrimer generation increased. Thus, the three-dimensional assembly of metalloporphyrins and peptides in the dendrimer was an effective module for light-harvesting antennae in an artificial photosynthetic system.
Collapse
Affiliation(s)
- M Sakamoto
- Department of Bioengineering, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Nagatsuta, Yokohama, Japan
| | | | | |
Collapse
|
27
|
Sakamoto M, Kamachi T, Okura I, Ueno A, Mihara H. Photoinduced hydrogen evolution with peptide dendrimer-multi-Zn(II)-porphyrin, viologen, and hydrogenase. Biopolymers 2001; 59:103-9. [PMID: 11373723 DOI: 10.1002/1097-0282(200108)59:2<103::aid-bip1009>3.0.co;2-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
To construct an artificial photosynthetic system, multi-Zn(II)-mesoporphyrins in peptide dendrimers were equipped as a photosensitizer of photoinduced hydrogen evolution in a four-component system (electron donor, photosensitizer, electron carrier, and catalyst), so that hydrogen was evolved effectively by the dendrimer architecture, for the first time. The hydrogen evolution activity was correlated to the photoreduction ability of viologen by the Zn-porphyrin-peptide dendrimers. Additionally, using positively charged methyl-viologen as an electron carrier, the photoinduced hydrogen evolution function with the positively charged peptide dendrimer was superior to that with the negatively charged peptide dendrimer, despite that the positive dendrimer did not strongly bind the positively charged methyl-viologen with the electrostatic interaction. By contrast, when zwitterionic propylviologen sulfonate was used, photoreduction and hydrogen evolution properties were identical between the positively and the negatively charged dendrimers. These results demonstrated that the dynamic interaction between the positive dendrimer and methyl-viologen was preferable for the photoreduction and hydrogen evolution, and that the three-dimensional assembly of Zn(II)-mesoporphyrins using the peptide dendrimers was effective as a photosensitizer in the artificial photosynthesis.
Collapse
Affiliation(s)
- M Sakamoto
- Department of Bioengineering, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Nagatsuta, Yokohama 226-8501, Japan
| | | | | | | | | |
Collapse
|