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Mukhopadhyay S, Debgupta J, Singh C, Kar A, Das SK. A Keggin Polyoxometalate Shows Water Oxidation Activity at Neutral pH: POM@ZIF-8, an Efficient and Robust Electrocatalyst. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711920] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | | | - Aranya Kar
- School of Chemistry; University of Hyderabad; India
| | - Samar K. Das
- School of Chemistry; University of Hyderabad; India
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Mukhopadhyay S, Debgupta J, Singh C, Kar A, Das SK. A Keggin Polyoxometalate Shows Water Oxidation Activity at Neutral pH: POM@ZIF-8, an Efficient and Robust Electrocatalyst. Angew Chem Int Ed Engl 2018; 57:1918-1923. [DOI: 10.1002/anie.201711920] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Indexed: 11/05/2022]
Affiliation(s)
| | | | | | - Aranya Kar
- School of Chemistry; University of Hyderabad; India
| | - Samar K. Das
- School of Chemistry; University of Hyderabad; India
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3
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Herritt M, Dhanapal AP, Fritschi FB. Identification of Genomic Loci Associated with the Photochemical Reflectance Index by Genome-Wide Association Study in Soybean. THE PLANT GENOME 2016; 9. [PMID: 27898827 DOI: 10.3835/plantgenome2015.08.0072] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 02/24/2016] [Indexed: 05/10/2023]
Abstract
The photochemical reflectance index (PRI) is determined from canopy spectral reflectance measurements and can provide important information about photosynthesis. The PRI can be used to assess the epoxidation state of xanthophyll pigments, which provides information on nonphotochemical quenching (NPQ) and the amount of energy used for photosynthesis. Genome-wide association analyses were conducted to identify single-nucleotide polymorphisms (SNPs) and genomic loci associated with PRI using data from a soybean [ (L.) Merr.] diversity panel grown under field conditions over 2 yr. Based on a mixed linear model (MLM), 31 unique candidate SNPs that identify 15 putative loci on 11 chromosomes were identified. Several candidate genes known to be associated with NPQ, photosynthesis, and sugar transport processes were identified in the proximity of 10 putative loci. Violaxanthin de-epoxidase, one of the identified genes, is directly involved in the xanthophyll cycle, which plays a major role in NPQ. This study is the first to identify genomic loci for PRI and illustrates the potential of canopy spectral reflectance measurements for high-throughput phenotyping of a photosynthesis related trait. Significant SNPs, candidate genes, and genotypes contrasting for PRI identified in this study may prove useful for crop improvement efforts.
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Chen L, Jia H, Du L, Tian Q, Gao Y, Liu Y. Release of the Oxygen-Evolving Complex Subunits from Photosystem II Membranes in Phosphorylation Condition under Light Stress. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201180434] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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5
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Brudvig GW, Crabtree RH. Bioinorganic Chemistry of Manganese Related to Photosynthetic Oxygen Evolution. PROGRESS IN INORGANIC CHEMISTRY 2007. [DOI: 10.1002/9780470166383.ch2] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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6
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Touloupakis E, Giannoudi L, Piletsky SA, Guzzella L, Pozzoni F, Giardi MT. A multi-biosensor based on immobilized Photosystem II on screen-printed electrodes for the detection of herbicides in river water. Biosens Bioelectron 2005; 20:1984-92. [PMID: 15741067 DOI: 10.1016/j.bios.2004.08.035] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2004] [Revised: 08/25/2004] [Accepted: 08/25/2004] [Indexed: 10/26/2022]
Abstract
A multi-biosensor for detection of herbicides and pollutants was constructed using various photosynthetic preparations as biosensing elements. The photosynthetic thylakoid from Spinacia oleracea L., Senecio vulgaris and its mutant resistant to atrazine were immobilized with (BSA-GA) on the surface of screen-printed sensors composed of a graphite-working electrode and Ag/AgCl reference electrode deposited on a polymeric substrate. The biosensor was composed of four flow cells with independent illumination of 650 nm to activate electron transfer in Photosystem II. The principle of the detection was based on the fact that herbicides selectively block electron transport activity in a concentration-dependent manner and that the four PSII biomediators show differential recognition activity toward herbicides. Changes of the activity were registered amperometrically as rate of photoreduction of the artificial electron acceptor DQ. The setup resulted in a reusable herbicide multibiosensor with a good stability (half-life of 16.7 h for spinach thylakoids) and limit of detection of about 10(-8) M for herbicides recovered in spring in river.
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Affiliation(s)
- E Touloupakis
- Institute of Crystallography (Section of IC-Bari), National Research Council of Italy (CNR), via Salaria km 29.300-00016, Monterotondo Scalo, Rome, Italy
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7
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Ifuku K, Nakatsu T, Shimamoto R, Yamamoto Y, Ishihara S, Kato H, Sato F. Structure and function of the PsbP protein of photosystem II from higher plants. PHOTOSYNTHESIS RESEARCH 2005; 84:251-5. [PMID: 16049782 DOI: 10.1007/s11120-004-7160-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2004] [Accepted: 12/03/2004] [Indexed: 05/03/2023]
Abstract
PsbP is a membrane extrinsic subunit of Photosystem II (PS II), which is involved in retaining Ca2+ and Cl-, two inorganic cofactors for the water-splitting reaction. In this study, we re-investigated the role of N-terminal region of PsbP on the basis of its three-dimensional structure. In previous paper [Ifuku and Sato (2002) Plant Cell Physiol 43: 1244-1249], a truncated PsbP lacking 19 N-terminal residues (Delta19) was found to bind to NaCl-washed PS II lacking PsbP and PsbQ without activation of oxygen evolution at all. Three-dimensional (3D) structure of PsbP suggests that deletion of 19 N-terminal residues would destabilize its protein structure, as indicated by the high sensitivity of Delta19 to trypsin digestion. Thus, a truncated PsbP lacking 15 N-terminal residues (Delta15), which retained core PsbP structure, was produced. Whereas Delta15 was resistant to trypsin digestion and bound to NaCl-washed PS II membranes, it did not show the activation of oxygen evolution. This result indicated that the interaction of 15-residue N-terminal flexible region of PsbP with PS II was important for Ca2+ and Cl- retention in PS II, although the 15 N-terminal residues were not essential for the binding of PsbP to PS II. The possible N-terminal residues of PsbP that would be involved in this interaction are discussed.
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Affiliation(s)
- Kentaro Ifuku
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan.
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8
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Ifuku K, Nakatsu T, Kato H, Sato F. Crystal structure of the PsbP protein of photosystem II from Nicotiana tabacum. EMBO Rep 2004; 5:362-7. [PMID: 15031714 PMCID: PMC1299024 DOI: 10.1038/sj.embor.7400113] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2003] [Revised: 01/16/2004] [Accepted: 01/26/2004] [Indexed: 11/09/2022] Open
Abstract
PsbP is a membrane-extrinsic subunit of the water-oxidizing complex photosystem II (PS II). The evolutionary origin of PsbP has long been a mystery because it specifically exists in higher plants and green algae but not in cyanobacteria. We report here the crystal structure of PsbP from Nicotiana tabacum at a resolution of 1.6 A. Its structure is mainly composed of beta-sheet, and is not similar to any structures in cyanobacterial PS II. However, the electrostatic surface potential of PsbP is similar to that of cyanobacterial PsbV (cyt c(550)), which has a function similar to PsbP. A structural homology search with the DALI algorithm indicated that the folding of PsbP is very similar to that of Mog1p, a regulatory protein for the nuclear transport of Ran GTPase. The structure of PsbP provides insight into its novel function in GTP-regulated metabolism in PS II.
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Affiliation(s)
- Kentaro Ifuku
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto, Japan
- Membrane Dynamics Research Group, RIKEN Harima Institute at SPring-8, Hyogo, Japan
| | - Toru Nakatsu
- Membrane Dynamics Research Group, RIKEN Harima Institute at SPring-8, Hyogo, Japan
- Department of Structural Biology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Hiroaki Kato
- Membrane Dynamics Research Group, RIKEN Harima Institute at SPring-8, Hyogo, Japan
- Department of Structural Biology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Fumihiko Sato
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto, Japan
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9
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Henmi T, Yamasaki H, Sakuma S, Tomokawa Y, Tamura N, Shen JR, Yamamoto Y. Dynamic Interaction between the D1 protein, CP43 and OEC33 at the lumenal side of photosystem II in spinach chloroplasts: evidence from light-induced cross-Linking of the proteins in the donor-side photoinhibition. PLANT & CELL PHYSIOLOGY 2003; 44:451-6. [PMID: 12721387 DOI: 10.1093/pcp/pcg049] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
During the donor-side photoinhibition of spinach photosystem II, the reaction center D1 protein cross-linked with the antenna chlorophyll binding protein CP43 of photosystem II lacking the oxygen-evolving complex (OEC) subunit proteins. The cross-linking did not occur upon illumination of photosystem II samples that retained the OEC33, nor when OEC33-depleted photosystem II samples were reconstituted with the OEC33 prior to illumination. These results suggest that the D1 protein, CP43 and the OEC33 are located in close proximity at the lumenal side of photosystem II, and that the OEC33 suppresses the unnecessary contact between the D1 protein and CP43. Previously we presented data showing the D1 protein located adjacent to CP43 on the stromal side of photosystem II [Ishikawa et al. (1999) BIOCHIM: Biophys. Acta 1413: 147]. The present data suggest that the spatial arrangement of the D1 protein and CP43 at the lumenal side of photosystem II in spinach chloroplasts is similar to that at the stromal side of photosystem II and is consistent with the assignment of these proteins recently proposed on the crystal structures of the photosystem II complexes from cyanobacteria [Zouni et al. (2001) Nature 409: 739, Kamiya and Shen 2003 PROC: Natl. Acad. Sci. USA, 100: 98]. Moreover, the data suggest that the binding condition and positioning of the OEC33 in the photosystem II complex from higher plants may be different from those in cyanobacteria.
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Affiliation(s)
- Takahiro Henmi
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530 Japan
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10
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Lindberg K, Wydrzynski T, Vänngård T, Andréasson LE. Slow release of chloride from 36
Cl-labeled photosystem II membranes. FEBS Lett 2001. [DOI: 10.1016/0014-5793(90)80788-k] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Removal of 33 kDa extrinsic protein specifically stabilizes the S2
QA
−
charge pair in photosystem II. FEBS Lett 2001. [DOI: 10.1016/0014-5793(87)81439-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Enami I, Kamo M, Ohta H, Takahashi S, Miura T, Kusayanagi M, Tanabe S, Kamei A, Motoki A, Hirano M, Tomo T, Satoh K. Intramolecular cross-linking of the extrinsic 33-kDa protein leads to loss of oxygen evolution but not its ability of binding to photosystem II and stabilization of the manganese cluster. J Biol Chem 1998; 273:4629-34. [PMID: 9468521 DOI: 10.1074/jbc.273.8.4629] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The extrinsic 33-kDa protein of photosystem II (PSII) was intramolecularly cross-linked by a zero-length cross-linker, 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide. The resulting cross-linked 33-kDa protein rebound to urea/NaCl-washed PSII membranes, which stabilized the binding of manganese as effectively as the untreated 33-kDa protein. In contrast, the oxygen evolution was not restored by binding of the cross-linked protein, indicating that the binding and manganese-stabilizing capabilities of the 33-kDa protein are retained but its reactivating ability is lost by intramolecular cross-linking of the protein. From measurements of CD spectra at high temperatures, the secondary structure of the intramolecularly cross-linked 33-kDa protein was found to be stabilized against heat treatment at temperatures 20 degrees C higher than that of the untreated 33-kDa protein, suggesting that structural flexibility of the 33-kDa protein was much decreased by the intramolecular cross-linking. The rigid structure is possibly responsible for the loss of the reactivating ability of the 33-kDa protein, which implies that binding of the 33-kDa protein to PSII is accompanied by a conformational change essential for the reactivation of oxygen evolution. Peptide mapping, N-terminal sequencing, and mass spectroscopic analysis of protease-digested products of the intramolecularly cross-linked 33-kDa protein revealed that cross-linkings occurred between the amino group of Lys48 and the carboxyl group of Glu246, and between the carboxyl group of Glu10 and the amino group of Lys14. These cross-linked amino acid residues are thus closely associated with each other through electrostatic interactions.
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Affiliation(s)
- I Enami
- Department of Biology, Faculty of Science, Science University of Tokyo, Kagurazaka 1-3, Shinjuku-ku, Tokyo 162, Japan.
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Hankamer B, Barber J, Boekema EJ. STRUCTURE AND MEMBRANE ORGANIZATION OF PHOTOSYSTEM II IN GREEN PLANTS. ACTA ACUST UNITED AC 1997; 48:641-671. [PMID: 15012277 DOI: 10.1146/annurev.arplant.48.1.641] [Citation(s) in RCA: 276] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Photosystem II (PSII) is the pigment protein complex embedded in the thylakoid membrane of higher plants, algae, and cyanobacteria that uses solar energy to drive the photosynthetic water-splitting reaction. This chapter reviews the primary, secondary, tertiary, and quaternary structures of PSII as well as the function of its constituent subunits. The understanding of in vivo organization of PSII is based in part on freeze-etched and freeze-fracture images of thylakoid membranes. These images show a resolution of about 40-50 A and so provide information mainly on the localization, heterogeneity, dimensions, and shapes of membrane-embedded PSII complexes. Higher resolution of about 15-40 A has been obtained from single particle images of isolated PSII complexes of defined and differing subunit composition and from electron crystallography of 2-D crystals. Observations are discussed in terms of the oligomeric state and subunit organization of PSII and its antenna components.
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Affiliation(s)
- Ben Hankamer
- Wolfson Laboratories, Department of Biochemistry, Imperial College of Science, Technology and Medicine, London SW7 2AY, United Kingdom, Biophysical Chemistry, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 4, Groningen, NL-9747 AG The Netherlands
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14
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Enami I, Tohri A, Kamo M, Ohta H, Shen JR. Identification of domains on the 43 kDa chlorophyll-carrying protein (CP43) that are shielded from tryptic attack by binding of the extrinsic 33 kDa protein with photosystem II complex. BIOCHIMICA ET BIOPHYSICA ACTA 1997; 1320:17-26. [PMID: 9186777 DOI: 10.1016/s0005-2728(97)00005-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The structural association of the spinach 33 kDa extrinsic protein with the 43 kDa chlorophyll-carrying protein (CP43) in oxygen-evolving photosystem II (PS II) complexes was investigated by comparing the peptide mappings and N-terminal sequences of the trypsin-digested products of NaCl-washed PS II membranes, which bind the 33 kDa protein, with those of CaCl2-washed PS II membranes, which lack the 33 kDa protein. (1) Peptide from N-terminus to Arg26 of CP43, which is exposed to stromal side, was digested in both PS II membranes, independent of binding of the 33 kDa protein. (2) Peptide bond of Arg357-Phe358 located in the large extrinsic loop E of CP43, which is exposed to lumenal side, was cleaved by trypsin in CaCl2-washed PS II membranes but not in NaCl-washed PS II membranes. This indicates that the region around Arg357-Phe358 in loop E of CP43 is shielded from tryptic attack by binding of the 33 kDa protein to PS II. (3) Trypsin treatment of CaCl2-washed PS II membranes also cleaved peptide bond between Lys457 and Gly458 in C-terminal region of CP43, while no cleavage of this region was detected by trypsin treatment of NaCl-washed PS II membranes. This implies that a conformational change of the C-terminal region of CP43 which is exposed to stromal side occurred upon removal of the 33 kDa protein, which makes the C-terminal region accessible to trypsin. (4) Release of peptide from Gln60 to C-terminus of the alpha-subunit of cytochrome b-559 was detected only in trypsin treatment of CaCl2-washed PS II membranes, indicating that the C-terminal region of this subunit is shielded from tryptic attack by binding of the 33 kDa protein. (5) The PS II membranes, in which Arg357-Phe358, Lys457-Gly458 of CP43 and the C-terminal part of the cytochrome b-559 alpha-subunit had been cleaved by trypsin, was no longer able to bind the 33 kDa protein. This strongly suggests that a domain in loop E of CP43 and/or the C-terminal region of the cytochrome b-559 alpha-subunit are necessary for binding of the extrinsic 33 kDa protein to PS II.
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Affiliation(s)
- I Enami
- Department of Biology, Faculty of Science, Science University of Tokyo, Japan
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15
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Rosenberg MF, Holzenburg A, Shepherd FH, Nicholson WV, Flint TD, Ford RC. Rebinding of the extrinsic proteins of Photosystem II studied by electron microscopy and single particle alignment: an assessment with small two-dimensional ordered arrays of Photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1997. [DOI: 10.1016/s0005-2728(96)00124-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Miura T, Shen JR, Takahashi S, Kamo M, Nakamura E, Ohta H, Kamei A, Inoue Y, Domae N, Takio K, Nakazato K, Enami I. Identification of domains on the extrinsic 33-kDa protein possibly involved in electrostatic interaction with photosystem II complex by means of chemical modification. J Biol Chem 1997; 272:3788-98. [PMID: 9013637 DOI: 10.1074/jbc.272.6.3788] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The extrinsic 33-kDa protein of photosystem II (PSII) was modified with various reagents, and the resulting proteins were checked for the ability to rebind to PSII and to reactivate oxygen evolution. While modification of more than eight carboxyl groups of aspartyl and glutamyl residues with glycine methyl ester did not affect the rebinding and reactivating capabilities, modification of amino groups of lysyl residues with either N-succinimidyl propionate or 2, 4,6-trinitrobenzene sulfonic acid or modification of guanidino groups of arginyl residues with 2,3-butanedione resulted in a loss of rebinding and reactivating capabilities of the 33-kDa protein. Moreover, the number of lysyl and arginyl residues susceptible to modification was significantly decreased when the protein was bound to PSII as compared with when it was free in solution, whereas the number of carboxyl groups modified was little affected. These results suggested that positive charges are important for the electrostatic interaction between the extrinsic 33-kDa protein and PSII intrinsic proteins, whereas negative charges on the protein do not contribute to such interaction. By a combination of protease digestion and mass spectroscopic analysis, the domains of lysyl residues accessible to N-succinimidyl propionate or 2,4, 6-trinitrobenzene sulfonic acid modification only when the 33-kDa protein is free in solution were determined to be Lys4, Lys20, Lys66-Lys76, Lys101, Lys105, Lys130, Lys159, Lys186, and Lys230-Lys236. These domains include those previously reported accessible to N-hydroxysuccinimidobiotin only in solution (Frankel and Bricker (1995) Biochemistry 34, 7492-7497), and may be important for the interaction of the 33-kDa protein with PSII intrinsic proteins.
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Affiliation(s)
- T Miura
- Department of Biology, Faculty of Science, Science University of Tokyo, Kagurazaka 1-3, Shinjuku-ku, Tokyo 162, Japan
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17
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Photosystem II: Mapping the locations of the oxygen evolution-enhancing subunits by electron microscopy. Micron 1996. [DOI: 10.1016/0968-4328(96)00025-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Rashid A, Popovic R. Electron donation to photosystem II by diphenylcarbazide is inhibited both by the endogenous manganese complex and by exogenous manganese ions. Biochem Cell Biol 1995; 73:241-5. [PMID: 8829369 DOI: 10.1139/o95-029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Diphenylcarbazide (DPC) is an efficient electron donor to the inactive oxygen-evolving complex of photosystem II (PSII). We investigated the role of manganese on the rate of electron donation from DPC to PSII in both Mn-depleted (Tris washed) and Mn-retaining (NaCl washed) PSII preparations. The rate of electron donation from DPC to PSII was significantly higher in Mn-depleted than in Mn-retaining preparations, indicating a negative role of native Mn complex on DPC electron donation. The apparent Km values for DPC were found to be 0.11 and 0.17 mM for Mn-depleted and Mn-retaining PSII preparations, respectively. This difference in the Km values also indicates an antagonistic effect of endogenous Mn cluster on electron donation from DPC, which was markedly inhibited by exogenous Mn2+. However, the magnitude of inhibition was greater in Mn-depleted than in Mn-retaining PSII preparations. This indicates a higher accessibility to DPC to PSII in the absence of native Mn complex. Our results suggest (i) that Mn, either endogenous or added, acts as an accessibility barrier for DPC to donate electrons to PSII and (ii) that the native Mn complex not only functions as an accumulator of oxidizing equivalents but may also protect PSII from exogenous reductants.
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Affiliation(s)
- A Rashid
- Département de chimie, Université du Québec à Montréal, Canada
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19
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Bernier M, Carpentier R. The action of mercury on the binding of the extrinsic polypeptides associated with the water oxidizing complex of photosystem II. FEBS Lett 1995; 360:251-4. [PMID: 7883042 DOI: 10.1016/0014-5793(95)00101-e] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Mercury (Hg2+), a sulfhydryl group reactant, was used to probe structure-function relationships in photosystem II (PSII). In the present work, we investigated the impact of mercury on the polypeptide composition of PSII submembrane preparations. Electrophoretic analysis revealed that the incubation of the membranes in the presence of mercury produces the depletion of a polypeptide of molecular weight of 33 kDa. This polypeptide corresponds to the extrinsic protein EP33 of the oxygen evolving complex removed following urea treatment. However, the two closely related extrinsic polypeptides of 16 and 23 kDa, usually removed concomitantly after urea treatment, remained unaffected after the mercury treatment. These data demonstrated the existence of an intrinsic binding site for EP23. The molecular mode of action of mercury in the oxygen evolving complex of PSII is discussed.
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Affiliation(s)
- M Bernier
- Centre de recherche en photobiophysique, Université du Québec à Trois-Rivières, Canada
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20
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Rashid A, Camm EL, Ekramoddoullah AK. Molecular mechanism of action of Pb2+ and Zn2+ on water oxidizing complex of photosystem II. FEBS Lett 1994; 350:296-8. [PMID: 8070582 DOI: 10.1016/0014-5793(94)00789-6] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Pb2+ and Zn2+ inhibition of photosystem II (PSII) activity was reported to be mediated via displacement of native inorganic cofactors (Cl-, Ca2+ and Mn2+) from the oxygen evolving complex, OEC [Rashid and Popovic (1990) FEBS Lett. 271, 181-184; Rashid et al. (1991) Photosynth. Res. 30, 123-130]. Since the binding sites of these cofactors are protected by a shield of three extrinsic polypeptides (17, 23 and 33 kDa), we investigated whether these metal ions affect the extrinsic polypeptide shield of OEC. By immunoblotting with antibodies recognizing the 23 and 33 kDa polypeptides, we showed that both the metal ions significantly dissociated the 23 kDa (+17 kDa) polypeptide, and partially dissociated the 33 kDa. Ca2+, one of the important inorganic cofactors of oxygen evolution, strongly prevented the dissociating action of Pb2+ but did not prevent the action of Zn2+. The probable molecular mechanism of action of Pb2+ and Zn2+ on PSII OEC is discussed.
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Affiliation(s)
- A Rashid
- Department of Botany, University of British Columbia, Vancouver, Canada
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21
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Immobilization of the three extrinsic proteins in spinach oxygen-evolving Photosystem II membranes: roles of the proteins in stabilization of binding of Mn and Ca2+. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1994. [DOI: 10.1016/0005-2728(94)90195-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Debus RJ. The manganese and calcium ions of photosynthetic oxygen evolution. BIOCHIMICA ET BIOPHYSICA ACTA 1992; 1102:269-352. [PMID: 1390827 DOI: 10.1016/0005-2728(92)90133-m] [Citation(s) in RCA: 970] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- R J Debus
- Department of Biochemistry, University of California Riverside 92521-0129
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23
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Rashid A, Homann P. Properties of iodide-activated photosynthetic water-oxidizing complexes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1992. [DOI: 10.1016/0005-2728(92)90086-h] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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24
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Homann PH. Stabilization of the water oxidizing polypeptide assembly on Photosystem II membranes by osmolytes and other solutes. PHOTOSYNTHESIS RESEARCH 1992; 33:29-36. [PMID: 24408445 DOI: 10.1007/bf00032980] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/1992] [Accepted: 04/04/1992] [Indexed: 05/20/2023]
Abstract
The integrity of Photosystem II membranes isolated from chloroplast thylakoids is profoundly affected by the solute environment. Examples are given for stabilizing effects various solutes have on the binding of the 17 and 23 kDa extrinsic polypeptides under conditions conductive to their dissociation. It is concluded that these and many other solute effects on Photosystem II membranes can be accommodated readily in a concept developed by Timasheff and his coworkers according to which the responses of proteins to their solute environment are consequences of interaction preferences among the constituents of the solvent-protein-solute systems.
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Affiliation(s)
- P H Homann
- Department of Biological Science, Florida State University, 32306, Tallahassee, Florida, USA
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25
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Murata N, Mohanty PS, Hayashi H, Papageorgiou GC. Glycinebetaine stabilizes the association of extrinsic proteins with the photosynthetic oxygen-evolving complex. FEBS Lett 1992; 296:187-9. [PMID: 1733776 DOI: 10.1016/0014-5793(92)80376-r] [Citation(s) in RCA: 163] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The photosynthetic oxygen-evolving activity of the photosystem 2 complex, prepared from spinach, was labile when the complex was exposed to high-salt conditions under which the extrinsic proteins were dissociated from the complex. Glycinebetaine prevented the dissociation of the 18-kDa and the 23-kDa extrinsic proteins from the photosystem 2 complex in the presence of 1 M NaCl. It also prevented the dissociation of the 33-kDa extrinsic protein from the complex in the presence of 1 M MgCl2 or 1 M CaCl2. The oxygen-evolving activity of the photosystem 2 complex was stabilized by glycinebetaine when the complex was subjected to treatment with NaCl and MgCl2.
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Affiliation(s)
- N Murata
- Department of Regulation Biology, National Institute for Basic Biology, Okazaki, Japan
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26
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Papageorgiou GC, Lagoyanni T. Interactions of iodide ions with isolated photosystem 2 particles. Arch Biochem Biophys 1991; 285:339-43. [PMID: 1897936 DOI: 10.1016/0003-9861(91)90369-t] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effects of I- ions on O2 evolution by photosystem 2 particles, which were depleted of the 18-kDa and the 23-kDa extrinsic proteins of the O2 evolution complex by NaCl washing (dPS2 particles) were examined. In the absence of Cl- (incompetent dPS2) I- stimulated O2 evolution up to 3-6 mM, depending on the associated cation, and inhibited it at higher concentrations. In the presence of Cl- (competent dPS2), I- was inhibitory at all concentrations. The inhibition was reversible, it occurred at a site preceding Tyrz (Tyr residue mediating electron transfer from H2O to photosystem 2), and it interfered noncompetitively with the reactivation of incompetent dPS2 with Cl-. Furthermore, the organic salts tetrabutyl ammonium iodide and tetraphenyl phosphonium iodide proved to be stronger inhibitors than the inorganic NaI. This is interpreted as an indication of a negatively charged surface, situated behind a hydrophobic permeability barrier. Permeant organic cations, being better compensators of the inner surface charge than Na+, are also more apt in facilitating access of the I- ions to the inhibitory site in the vicinity of Tyrz.
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Affiliation(s)
- G C Papageorgiou
- National Research Center Demokritos, Institute of Biology, Athens, Greece
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27
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Tso J, Petrouleas V, Dismukes GC. A new mechanism-based inhibitor of photosynthetic water oxidation: acetone hydrazone. 1. Equilibrium reactions. Biochemistry 1990; 29:7759-67. [PMID: 2176824 DOI: 10.1021/bi00485a027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The process of photosynthetic water oxidation has been investigated by using a new type of water oxidation inhibitor, the alkyl hydrazones. Acetone hydrazone (AceH), (CH3)2CNNH2, inhibits water oxidation by a mechanism that is analogous to that of NH2OH. This involves binding to the water-oxidizing complex (WOC), followed by photoreversible reduction of manganese (loss of the S1----S2 reaction). At higher AceH concentrations the S1 state is reduced in the dark and Mn is released, albeit to a lesser extent than with NH2OH. Following extraction of Mn, AceH is able to donate electrons rapidly to the reaction center tyrosine radical Z+ (161Tyr-D1 protein), more slowly to a reaction center radical C+, and not at all to the dark-stable tyrosine radical D+ (160Tyr-D2 protein) which must be sequestered in an inaccessible site. Manganese, Z+, and C+ thus appear to be located in a common protein domain, with Mn being the first accessible donor, followed by Z+ and then C+. Photooxidation of Cyt b-559 is suppressed by AceH, indicating either reduction or competition for donation to P680+. Unexpectedly, Cl- was found not to interfere or compete with AceH for binding to the WOC in the S1 state, in contrast to the reported rate of binding of N,N-dimethylhydroxylamine, (CH3)2NOH [Beck, W., & Brudvig, G. (1988) J. Am. Chem. Soc. 110, 1517-1523]. We interpret the latter behavior as due to ionic screening of the thylakoid membrane, rather than a specific Cl- site involved in water oxidation.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J Tso
- Department of Chemistry, Princeton University, New Jersey 08544
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28
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Coleman WJ. Chloride binding proteins: mechanistic implications for the oxygen-evolving complex of Photosystem II. PHOTOSYNTHESIS RESEARCH 1990; 23:1-27. [PMID: 24420988 DOI: 10.1007/bf00030059] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/1987] [Accepted: 12/09/1988] [Indexed: 05/13/2023]
Abstract
Chloride plays a key role in activating the photosynethetic oxygen-evolving complex (OEC) of Photosystem II, but the OEC is only one of many enzymes affected by this anion. Some of the mechanistic features of Cl(-) involvement in water-splitting resemble those of other proteins whose structure and chemistry are known in detail. An overview of the similarities and differences between these Cl(-)-binding systems is presented.
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Affiliation(s)
- W J Coleman
- Department of Chemistry, Massachusetts Institute of Technology, 02139, Cambridge, MA, USA
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29
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Miyao M, Murata N. The mode of binding of three extrinsic proteins of 33 kDa, 23 kDa and 18 kDa in the photosystem II complex of spinach. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1989. [DOI: 10.1016/s0005-2728(89)80086-6] [Citation(s) in RCA: 63] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Enami I, Kamino K, Shen JR, Satoh K, Katoh S. Isolation and characterization of Photosystem II complexes which lack light-harvesting chlorophyll a/b proteins but retain three extrinsic proteins related to oxygen evolution from spinach. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1989. [DOI: 10.1016/s0005-2728(89)80006-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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The role of an extrinsic 9 kDa polypeptide in oxygen evolution by Photosystem II particles from Phormidium laminosum. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1989. [DOI: 10.1016/s0005-2728(89)80425-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Nearest neighbor relationships among constituent proteins of oxygen-evolving Photosystem II membranes: binding and function of the extrinsic 33 kDa protein. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1989. [DOI: 10.1016/s0005-2728(89)80399-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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33
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Shen JR, Satoh K, Katoh S. Isolation of an oxygen-evolving Photosystem II preparation containing only one tightly bound calcium atom from a chlorophyll b-deficient mutant of rice. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1988. [DOI: 10.1016/0005-2728(88)90015-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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Partial degradation of the extrinsic 23-kDa protein of the Photosystem II complex of spinach. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1988. [DOI: 10.1016/0005-2728(88)90024-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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35
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Refined purification and further characterization of oxygen-evolving and Tris-treated Photosystem II particles from the thermophilic Cyanobacterium synechococcus sp. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1988. [DOI: 10.1016/0005-2728(88)90006-0] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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36
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Philbrick JB, Zilinskas BA. Cloning, nucleotide sequence and mutational analysis of the gene encoding the Photosystem II manganese-stabilizing polypeptide of Synechocystis 6803. MOLECULAR & GENERAL GENETICS : MGG 1988; 212:418-25. [PMID: 3138527 DOI: 10.1007/bf00330845] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Affinity purified, polyclonal antibodies raised against the Photosystem II 33 kDa manganese-stabilizing polypeptide of the spinach oxygen-evolving complex were used to isolate the gene encoding the homologous protein from Synechocystis 6803. Comparison of the amino acid sequence deduced from the Synechocystis psb1 nucleotide sequence with recently published sequences of spinach and pea confirms the homology indicated by antigenic cross-reactivity and shows that the cyanobacterial and higher plant sequences are 43% identical and 63% conserved. Regions of identity, varying in length from 1 to 10 consecutive residues, are distributed throughout the protein. The 28 residues at the amino terminus of the psb1 gene product, characteristic of prokaryotic signal peptides, show homology with the carboxyl-terminal third of the transit sequences of pea and spinach and are most likely needed for the transport of the manganese-stabilizing protein across the thylakoid membrane to its destination of the lumen. Synechocystis mutants which contain a kanamycin resistance gene cassette inserted into the coding region for the 32 kDa polypeptide were constructed. These mutants contain no detectable 32 kDa polypeptide, do not evolve oxygen, and are incapable of photoautotrophic growth.
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Affiliation(s)
- J B Philbrick
- Department of Biochemistry and Microbiology, Cook College, Rutgers University, New Brunswick, NJ 08903
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37
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Homann PH. The chloride and calcium requirement of photosynthetic water oxidation: Effects of pH. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1988. [DOI: 10.1016/0005-2728(88)90113-2] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Diner BA, Ries DF, Cohen BN, Metz JG. COOH-terminal processing of polypeptide D1 of the photosystem II reaction center of Scenedesmus obliquus is necessary for the assembly of the oxygen-evolving complex. J Biol Chem 1988. [DOI: 10.1016/s0021-9258(18)68403-0] [Citation(s) in RCA: 143] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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39
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Cantrell A, Bryant DA. Nucleotide sequence of the genes encoding cytochrome b-559 from the cyanelle genome of Cyanophora paradoxa. PHOTOSYNTHESIS RESEARCH 1988; 16:65-81. [PMID: 24430992 DOI: 10.1007/bf00039486] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/1987] [Accepted: 12/22/1987] [Indexed: 06/03/2023]
Abstract
Cyanophora paradoxa is a flagellated protozoan which possesses unusual, chloroplast-like organelles referred to as cyanelles. The psbE and psbF genes, which encode the two apoprotein subunits of cytochrome b-559, have been cloned from the cyanelle genome of C. paradoxa. The complete nucleotide sequences of these genes and their flanking sequences were determined by the chain-termination, dideoxy method. The psbE gene is composed of 75 codons and predicts a polypeptide of 8462 Da that is seven to nine residues smaller than most other psbE gene products. The psbF gene consists of 43 codons and predicts a polypeptide of 4761 Da. Two open reading frames, whose sequences are highly conserved among cyanobacteria and numerous higher plants, were located in the nucleotide sequence downstream from the psbF gene. The first open reading frame, denoted psbI, is composed of 39 codons, while the second open reading frame, denoted psbJ, is composed of 41 codons. The predicted amino acid sequences of the psbI and psbJ gene products predict proteins of 5473 and 3973 Da respectively. These proteins are probably integral membrane proteins anchored in the membrane by a single, transmembrane alpha helix. The psbEFIJ genes are probably co-transcribed and constitute an operon as found for other organisms. Each of the four genes is preceded by a polypurine sequence which resembles the consensus ribsosome binding sequences for Escherichia coli.
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Affiliation(s)
- A Cantrell
- Department of Molecular and Cell Biology, Penn State University, S-101 Frear Building, 16802, University Park, PA, USA
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40
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Yamamoto Y. Analysis of the relationship between the extrinsic 30-kDa protein, manganese and oxygen evolution in the thylakoid of Chlamydomonas reinhardtii grown under manganese-deficient conditions. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1988. [DOI: 10.1016/0005-2728(88)90066-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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41
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Homann PH. Chloride relations of photosystem II membrane preparations depleted of, and resupplied with, their 17 and 23 kDa extrinsic polypeptides. PHOTOSYNTHESIS RESEARCH 1988; 15:205-220. [PMID: 24430923 DOI: 10.1007/bf00047353] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/1987] [Accepted: 10/14/1987] [Indexed: 06/03/2023]
Abstract
Photosystem II membranes prepared from thylakoids of Phytolacca americana chloroplasts were depleted of their intrinsic 17 and 23 kDa polypeptides, and the effects of a reconstitution of these polypeptides on the Cl(-) requirements of O2 evolution activity were analyzed. It was found that the activating effectiveness of limiting amounts of added Cl(-) was increased several fold by an addition of the 23 kDa polypeptide. When it was supplemented by the 17 kDa species, only a small additional increase occurred, but Cl(-) retention in Cl(-) free media was enhanced greatly. Addition of the 17 kDa polypeptide alone was without effect because it is known that it cannot bind to its native site unless the 23 kDa polypeptide is in place.Optimal enhancements of the effectiveness of activating added Cl(-) were observed when the assays were done in the presence of the reconstituting polypeptides. When the reconstituting treatment with the polypeptides, and the assay of the Cl(-) relations, were separated, it was advantageous to have Cl(-) present in the reconstituting medium, and not to add Ca(2+), another cofactor of photosynthetic water oxidation. Those requirements are attributed to the labilizing effects Cl(-) free conditions and divalent cations have on the association of especially the 23 kDa polypeptides with the water oxidizing complex, and to a possible aggregation of the membranes under the influence of Ca(2+) which might have impeded proper polypeptide binding.
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Affiliation(s)
- P H Homann
- Institute of Molecular Biophysics, Florida State University, 32306-3015, Tallahassee, Florida, USA
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42
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Ikeuchi M, Koike H, Inoue Y. Iodination of D1 (herbicide-binding protein) is coupled with photooxidation of 125I− associated with Cl−-binding site in Photosystem-II water-oxidation system. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1988. [DOI: 10.1016/0005-2728(88)90151-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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43
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Reilly P, Nelson N. Photosystem I complex. PHOTOSYNTHESIS RESEARCH 1988; 19:73-84. [PMID: 24425369 DOI: 10.1007/bf00114570] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/1987] [Accepted: 03/30/1988] [Indexed: 06/03/2023]
Abstract
Photosystem I is an integral component of the thylakoid membrane which catalyzes the photoreduction of ferredoxin using plastocyanin or cytochrome c as electron donor. In higher plants, the photosystem I complex is composed of eight protein subunits, chlorophyll a, carotenoids, phylloquinone and bound iron sulfur clusters. The molecular biology and biochemistry of the complex are discussed in relation to the structure and function of the individual components. The mechanisms involved in the assembly of the components into a functional complex are also discussed.
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Affiliation(s)
- P Reilly
- Roche Research Center, Roche Institute of Molecular Biology, 07110, Nutley, New Jersey, USA
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44
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Organization of the oxygen-evolution enzyme complex studied by butanol/water phase partitioning of spinach photosystem II particles. J Biol Chem 1988. [DOI: 10.1016/s0021-9258(19)57420-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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45
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The location of the chloride binding sites in the oxygen-evolving complex of spinach Photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1987. [DOI: 10.1016/0005-2728(87)90124-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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46
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Yamamoto Y, Kubota F. Specific release of the extrinsic 18-kDa protein from spinach Photosystem-II particles by the treatment with NaCl and methanol and its application for large-scale purification of the three extrinsic proteins of Photosystem II without chromatography. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1987. [DOI: 10.1016/0005-2728(87)90110-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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47
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Bricker TM, Frankel LK. Use of a monoclonal antibody in structural investigations of the 49-kDa polypeptide of photosystem II. Arch Biochem Biophys 1987; 256:295-301. [PMID: 2440384 DOI: 10.1016/0003-9861(87)90449-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A monoclonal antibody, FAC2, was isolated by immunization of mice with a Photosystem II core preparation followed by splenic fusion and standard monoclonal antibody screening and production techniques. This antibody recognizes the 49-kDa polypeptide of Photosystem II which is the apoprotein of CPal. The antigenic determinant recognized by this antibody lies on a cyanogen bromide fragment which appears as a doublet with an apparent molecular mass of 14.5 kDa. FAC2 was used to follow the effects of trypsin on the 49-kDa polypeptide in a membrane environment. Our results indicate that the extrinsic polypeptides of Photosystem II which are known to be involved in oxygen evolution protect the 49-kDa polypeptide from tryptic attack. Additionally, Photosystem II membranes which are treated with alkaline Tris exhibit a large increase in the ability to bind FAC2. This increase is not observed with membranes treated with calcium chloride or sodium chloride. These results indicate that the 49-kDa polypeptide may be at least structurally associated with the component(s) responsible for oxygen evolution.
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48
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Yamamoto Y, Nakayama S, Cohn CL, Krogmann DW. Highly efficient purification of the 33-, 24-, and 18-kDa proteins in spinach photosystem II by butanol/water phase partitioning and high-performance liquid chromatography. Arch Biochem Biophys 1987; 255:156-61. [PMID: 3296951 DOI: 10.1016/0003-9861(87)90305-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The 33-, 24-, and 18-kDa proteins involved in photosynthetic oxygen evolution were purified from spinach photosystem II particles by butanol/water phase partitioning and high-performance liquid chromatography with a silica-based cation-exchange column. With this procedure a significant improvement was made in the time required for the purification and also in the amount and purity of the proteins. The N-terminal sequence of amino acid was determined for the purified proteins. Partial degradation of the proteins, which sometimes occurred in the purification, was not detected in the new procedure.
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49
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Homann PH. The relations between the chloride, calcium, and polypeptide requirements of photosynthetic water oxidation. J Bioenerg Biomembr 1987; 19:105-23. [PMID: 3294820 DOI: 10.1007/bf00762720] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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50
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Isolation and characterization of an oxygen-evolving Photosystem II reaction center core preparation and a 28 kDa Chl-a-binding protein. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1987. [DOI: 10.1016/0005-2728(87)90078-8] [Citation(s) in RCA: 203] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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