1
|
Bommer M, Bondar AN, Zouni A, Dobbek H, Dau H. Crystallographic and Computational Analysis of the Barrel Part of the PsbO Protein of Photosystem II: Carboxylate–Water Clusters as Putative Proton Transfer Relays and Structural Switches. Biochemistry 2016; 55:4626-35. [DOI: 10.1021/acs.biochem.6b00441] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Martin Bommer
- Institut
für Biologie, Strukturbiologie/Biochemie, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
| | - Ana-Nicoleta Bondar
- Fachbereich
Physik, Theoretical Molecular Biophysics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Athina Zouni
- Institut
für Biologie, Biophysik der Photosynthese, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
| | - Holger Dobbek
- Institut
für Biologie, Strukturbiologie/Biochemie, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
| | - Holger Dau
- Fachbereich
Physik, Biophysics and Photosynthesis, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| |
Collapse
|
2
|
Kokhan O, Ponomarenko N, Pokkuluri PR, Schiffer M, Tiede DM. Multimerization of solution-state proteins by tetrakis(4-sulfonatophenyl)porphyrin. Biochemistry 2014; 53:5070-9. [PMID: 25028772 DOI: 10.1021/bi500278g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Surface binding and interactions of anionic porphyins bound to cationic proteins have been studied for nearly three decades and are relevant as models for protein surface molecular recognition and photoinitiated electron transfer. However, interpretation of data in nearly all reports explicitly or implicitly assumed interaction of porphyrin with monodisperse proteins in solutions. In this report, using small-angle X-ray scattering with solution phase samples, we demonstrate that horse heart cytochrome (cyt) c, triheme cytochrome c7 PpcA from Geobacter sulfurreducens, and hen egg lysozyme multimerize in the presence of zinc tetrakis(4-sulfonatophenyl)porphyrin (ZnTPPS). Multimerization of cyt c showed a pH dependence with a stronger apparent binding affinity under alkaline conditions and was weakened in the presence of a high salt concentration. Ferric-cyt c formed complexes larger than those formed by ferro-cyt c. Free base TPPS and FeTPPS facilitated formation of complexes larger than those of ZnTPPS. No increase in protein aggregation state for cationic proteins was observed in the presence of cationic porphyrins. All-atom molecular dynamics simulations of cyt c and PpcA with free base TPPS corroborated X-ray scattering results and revealed a mechanism by which the tetrasubstituted charged porphyrins serve as bridging ligands nucleating multimerization of the complementarily charged protein. The final aggregation products suggest that multimerization involves a combination of electrostatic and hydrophobic interactions. The results demonstrate an overlooked complexity in the design of multifunctional ligands for protein surface recognition.
Collapse
Affiliation(s)
- Oleksandr Kokhan
- Chemical Sciences and Engineering Division, Argonne National Laboratory , Lemont, Illinois 60439, United States
| | | | | | | | | |
Collapse
|
3
|
Marín M, Ott T. Intrinsic disorder in plant proteins and phytopathogenic bacterial effectors. Chem Rev 2014; 114:6912-32. [PMID: 24697726 DOI: 10.1021/cr400488d] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Macarena Marín
- Genetics Institute, Faculty of Biology, Ludwig-Maximilians-University of Munich , Grosshaderner Strasse 2-4, 82152 Martinsried, Germany
| | | |
Collapse
|
4
|
Offenbacher AR, Polander BC, Barry BA. An intrinsically disordered photosystem II subunit, PsbO, provides a structural template and a sensor of the hydrogen-bonding network in photosynthetic water oxidation. J Biol Chem 2013; 288:29056-68. [PMID: 23940038 DOI: 10.1074/jbc.m113.487561] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Photosystem II (PSII) is a membrane-bound enzyme that utilizes solar energy to catalyze the photooxidation of water. Molecular oxygen is evolved after four sequential light-driven oxidation reactions at the Mn4CaO5 oxygen-evolving complex, producing five sequentially oxidized states, Sn. PSII is composed of 17 membrane-spanning subunits and three extrinsic subunits, PsbP, PsbQ, and PsbO. PsbO is intrinsically disordered and plays a role in facilitation of the water oxidizing cycle. Native PsbO can be removed and substituted with recombinant PsbO, thereby restoring steady-state activity. In this report, we used reaction-induced Fourier transform infrared spectroscopy to obtain information concerning the role of PsbP, PsbQ, and PsbO during the S state cycle. Light-minus-dark difference spectra were acquired, monitoring structural changes associated with each accessible flash-induced S state transition in a highly purified plant PSII preparation (Triton X-100, octylthioglucoside). A comparison of S2 minus S1 spectra revealed that removal of PsbP and PsbQ had no significant effect on the data, whereas amide frequency and intensity changes were associated with PsbO removal. These data suggest that PsbO acts as an organizational template for the PSII reaction center. To identify any coupled conformational changes arising directly from PsbO, global (13)C-PsbO isotope editing was employed. The reaction-induced Fourier transform infrared spectra of accessible S states provide evidence that PsbO spectral contributions are temperature (263 and 277 K) and S state dependent. These experiments show that PsbO undergoes catalytically relevant structural dynamics, which are coupled over long distance to hydrogen-bonding changes at the Mn4CaO5 cluster.
Collapse
Affiliation(s)
- Adam R Offenbacher
- From the School of Chemistry and Biochemistry and the Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332
| | | | | |
Collapse
|
5
|
Popelkova H, Yocum CF. PsbO, the manganese-stabilizing protein: Analysis of the structure–function relations that provide insights into its role in photosystem II. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2011; 104:179-90. [DOI: 10.1016/j.jphotobiol.2011.01.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 01/13/2011] [Accepted: 01/14/2011] [Indexed: 01/07/2023]
|
6
|
Slowik D, Rossmann M, Konarev PV, Irrgang KD, Saenger W. Structural Investigation of PsbO from Plant and Cyanobacterial Photosystem II. J Mol Biol 2011; 407:125-37. [DOI: 10.1016/j.jmb.2011.01.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2010] [Revised: 12/31/2010] [Accepted: 01/07/2011] [Indexed: 02/02/2023]
|
7
|
Tiede DM, Mardis KL, Zuo X. X-ray scattering combined with coordinate-based analyses for applications in natural and artificial photosynthesis. PHOTOSYNTHESIS RESEARCH 2009; 102:267-79. [PMID: 19636808 PMCID: PMC2891609 DOI: 10.1007/s11120-009-9475-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2009] [Accepted: 07/10/2009] [Indexed: 05/28/2023]
Abstract
Advances in X-ray light sources and detectors have created opportunities for advancing our understanding of structure and structural dynamics for supramolecular assemblies in solution by combining X-ray scattering measurement with coordinate-based modeling methods. In this review the foundations for X-ray scattering are discussed and illustrated with selected examples demonstrating the ability to correlate solution X-ray scattering measurements to molecular structure, conformation, and dynamics. These approaches are anticipated to have a broad range of applications in natural and artificial photosynthesis by offering possibilities for structure resolution for dynamic supramolecular assemblies in solution that can not be fully addressed with crystallographic techniques, and for resolving fundamental mechanisms for solar energy conversion by mapping out structure in light-excited reaction states.
Collapse
Affiliation(s)
- David M. Tiede
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA, Phone: 1-630-252-3539, Fax: 1-630-252-9286, URL: http://www.cse.anl.gov/Staff/Fundamental_Interactions/DMTiede.shtml
| | - Kristy L. Mardis
- Department of Chemistry and Physics, Chicago State University, Chicago, IL 60628, USA, Phone: 1-773-995-2171, Fax: 1-773-995-3809
| | - Xiaobing Zuo
- Protein Nucleic Acid Interaction Section, Structural Biophysics Laboratory, NCI-Frederick, National Institutes of Health, Frederick, MD 21702, USA
| |
Collapse
|
8
|
Williamson AK. Structural and functional aspects of the MSP (PsbO) and study of its differences in thermophilic versus mesophilic organisms. PHOTOSYNTHESIS RESEARCH 2008; 98:365-89. [PMID: 18780158 DOI: 10.1007/s11120-008-9353-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2008] [Accepted: 08/06/2008] [Indexed: 05/16/2023]
Abstract
The Manganese Stabilizing Protein (MSP) of Photosystem II (PSII) is a so-called extrinsic subunit, which reversibly associates with the other membrane-bound PSII subunits. The MSP is essential for maximum rates of O(2) production under physiological conditions as stabilizes the catalytic [Mn(4)Ca] cluster, which is the site of water oxidation. The function of the MSP subunit in the PSII complex has been extensively studied in higher plants, and the structure of non-PSII associated MSP has been studied by low-resolution biophysical techniques. Recently, crystal structures of PSII from the thermophilic cyanobacterium Thermosynechococcus elongatus have resolved the MSP subunit in its PSII-associated state. However, neither any crystal structure is available yet for MSP from mesophilic organisms, higher plants or algae nor has the non-PSII associated form of MSP been crystallized. This article reviews the current understanding of the structure, dynamics, and function of MSP, with a particular focus on properties of the MSP from T. elongatus that may be attributable to the thermophilic ecology of this organism rather than being general features of MSP.
Collapse
Affiliation(s)
- Adele K Williamson
- Research School of Biological Sciences, the Australian National University, Canberra 0200, Australia.
| |
Collapse
|
9
|
Williamson AK, Liggins JR, Hillier W, Wydrzynski T. The importance of protein-protein interactions for optimising oxygen activity in photosystem II: reconstitution with a recombinant thioredoxin--manganese stabilising protein. PHOTOSYNTHESIS RESEARCH 2007; 92:305-14. [PMID: 17484036 DOI: 10.1007/s11120-007-9165-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2006] [Accepted: 03/29/2007] [Indexed: 05/15/2023]
Abstract
In this paper we describe how photosystem II (PSII) from higher plants, which have been depleted, of the extrinsic proteins can be reconstituted with a chimeric fusion protein comprising thioredoxin from Escherichia coli and the manganese stabilising protein from Thermosynechococcus elongatus. Surprisingly, even though E. coli thioredoxin is completely unrelated to PSII, the fusion protein restores higher rates of activity upon rebinding to PSII than either the native spinach MSP, or T. elongatus MSP. PSII reconstituted with the fusion protein also has a lower requirement for calcium than PSII with the small extrinsic proteins removed, or PSII reconstituted with spinach or T. elongatus MSP. The MSP portion of the fusion protein is less thermally stable compared to isolated MSP from T. elongatus, which could be the key to its superior activation capability through greater flexibility. This work reveals the importance of protein-protein interactions in the water splitting activity of PSII and suggests that conformational configurations, which increase flexibility in MSP, are essential to its function, even when these are induced by an unrelated protein.
Collapse
Affiliation(s)
- A K Williamson
- Research School of Biological Sciences, The Australian National University, Canberra 0200, Australia.
| | | | | | | |
Collapse
|
10
|
Iverson TM. Evolution and unique bioenergetic mechanisms in oxygenic photosynthesis. Curr Opin Chem Biol 2006; 10:91-100. [PMID: 16504567 DOI: 10.1016/j.cbpa.2006.02.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2005] [Accepted: 02/16/2006] [Indexed: 11/17/2022]
Abstract
Oxygenic photosynthesis is one example of the many bioenergetic pathways utilized by different organisms to harvest energy from the environment. These pathways revolve around a theme of coupling oxidation-reduction reactions to the formation of membrane potential and subsequent ATP synthesis. Although the basic principles underlying bioenergetics are universally conserved, the constituents of the bioenergetic pathways in different organisms have evolved unique aspects to fill an evolutionary niche. Three-dimensional structures of all of the membrane-spanning components of the electron-transfer chain of oxygenic photosynthesis have revealed those unique aspects of this fascinating process, including the unique metallocofactor for catalysis, the determinants of the uniquely high voltage cofactor, and the numerous photoprotective mechanisms that guard against radical damage.
Collapse
Affiliation(s)
- Tina M Iverson
- Department of Pharmacology, Center for Structural Biology and Vanderbilt Institute for Chemical Biology, Vanderbilt University Medical Center, Nashville, TN 37232-6600, USA.
| |
Collapse
|
11
|
Abstract
Oxygenic photosynthesis, the principal converter of sunlight into chemical energy on earth, is catalyzed by four multi-subunit membrane-protein complexes: photosystem I (PSI), photosystem II (PSII), the cytochrome b(6)f complex, and F-ATPase. PSI generates the most negative redox potential in nature and largely determines the global amount of enthalpy in living systems. PSII generates an oxidant whose redox potential is high enough to enable it to oxidize H(2)O, a substrate so abundant that it assures a practically unlimited electron source for life on earth. During the last century, the sophisticated techniques of spectroscopy, molecular genetics, and biochemistry were used to reveal the structure and function of the two photosystems. The new structures of PSI and PSII from cyanobacteria, algae, and plants has shed light not only on the architecture and mechanism of action of these intricate membrane complexes, but also on the evolutionary forces that shaped oxygenic photosynthesis.
Collapse
Affiliation(s)
- Nathan Nelson
- Department of Biochemistry, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel.
| | | |
Collapse
|
12
|
Loll B, Gerold G, Slowik D, Voelter W, Jung C, Saenger W, Irrgang KD. Thermostability and Ca2+Binding Properties of Wild Type and Heterologously Expressed PsbO Protein from Cyanobacterial Photosystem II†. Biochemistry 2005; 44:4691-8. [PMID: 15779895 DOI: 10.1021/bi047614r] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Oxygenic photosynthesis takes place in the thylakoid membrane of cyanobacteria, algae, and higher plants. Initially light is absorbed by an oligomeric pigment-protein complex designated as photosystem II (PSII), which catalyzes light-induced water cleavage under release of molecular oxygen for the biosphere on our planet. The membrane-extrinsic manganese stabilizing protein (PsbO) is associated on the lumenal side of the thylakoids close to the redox-active (Mn)(4)Ca cluster at the catalytically active site of PSII. Recombinant PsbO from the thermophilic cyanobacterium Thermosynechococcus elongatus was expressed in Escherichia coli and spectroscopically characterized. The secondary structure of recombinant PsbO (recPsbO) was analyzed in the absence and presence of Ca(2+) using Fourier transform infrared spectroscopy (FTIR) and circular dichroism spectropolarimetry (CD). No significant structural changes could be observed when the PSII subunit was titrated with Ca(2+) in vitro. These findings are compared with data for spinach PsbO. Our results are discussed in the light of the recent 3D-structural analysis of the oxygen-evolving PSII and structural/thermodynamic differences between the two homologous proteins from thermophilic cyanobacteria and plants.
Collapse
Affiliation(s)
- Bernhard Loll
- Department of Chemistry/Crystallography, Free University Berlin, 14195 Berlin, Germany.
| | | | | | | | | | | | | |
Collapse
|
13
|
Nowaczyk M, Berghaus C, Stoll R, Rögner M. Preliminary structural characterisation of the 33 kDa protein (PsbO) in solution studied by site-directed mutagenesis and NMR spectroscopy. Phys Chem Chem Phys 2004. [DOI: 10.1039/b407316a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
14
|
De Las Rivas J, Barber J. Analysis of the Structure of the PsbO Protein and its Implications. PHOTOSYNTHESIS RESEARCH 2004; 81:329-43. [PMID: 16034536 DOI: 10.1023/b:pres.0000036889.44048.e4] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The PsbO protein is a ubiquitous extrinsic subunit of Photosystem II (PS II), the water splitting enzyme of photosynthesis. A recently determined 3D X-ray structure of a cyanobacterial protein bound to PS II has given an opportunity to conduct complete analyses of its sequence and structural characteristics using bioinformatic methods. Multiple sequence alignments for the PsbO family are constructed and correlated with the cyanobacterial structure. We identify the most conserved regions of PsbO and the mapping of their positions within the structure indicates their functional roles especially in relation to interactions of this protein with the lumenal surface of PS II. Homologous models for eukaryotic PsbO were built in order to compare with the prokaryotic protein. We also explore structural homology between PsbO and other proteins for which 3D structures are known and determine its structural classification. These analyses contribute to the understanding of the function and evolutionary origin of the PS II manganese stabilising protein.
Collapse
Affiliation(s)
- Javier De Las Rivas
- Grupo de Investigación Bioinformática y Estructura de Proteínas, Consejo Superior de Investigaciones Cientificas (CSIC), Salamanca, Spain
| | | |
Collapse
|