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Clayton RK, Clayton BJ. B850 pigment-protein complex of Rhodopseudomonas sphaeroides: Extinction coefficients, circular dichroism, and the reversible binding of bacteriochlorophyll. Proc Natl Acad Sci U S A 2010; 78:5583-7. [PMID: 16593090 PMCID: PMC348794 DOI: 10.1073/pnas.78.9.5583] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Chromatophores of Rhodopseudomonas sphaeroides yield the antenna complex B850 in either of two states, depending on the method of isolation. Methods using dodecyl (= lauryl) dimethylamine oxide yield B850 with an absorption spectrum like that in vivo: the bands at 800 and 850 nm, due to the bacteriochlorophyll (Bchl) components Bchl-800 and Bchl-850, are in ratio A(800)/A(850) = 0.65 +/- 0.05. When B850 is isolated by methods using dodecyl sulfate, the Bchl-800 is attenuated or absent. Bchl assays of these materials and of the isolated antenna complex B875 yielded the following extinction coefficients, +/-SD, on the basis of the molarity of Bchl: For B875, epsilon(875) = 126 +/- 8 mM(-1) cm(-1). For B850 in the normal (high-Bchl-800) state, epsilon(850) = 132 +/- 10 mM(-1) cm(-1). For the individual components of Bchl in B850, epsilon(850) of Bchl-850 = 184 +/- 13 mM(-1) cm(-1) and epsilon(800) of Bchl-800 = 213 +/- 28 mM(-1) cm(-1). With these coefficients the molecular ratio of Bchl-850 to Bchl-800 equals 1.8 +/- 0.4 for B850 in the high-Bchl-800 state. Starting with B850 depleted of Bchl-800, the addition of dodecyldimethylamine oxide restored the 800-nm absorption band. The 850-nm band became shifted toward the blue, narrowed, and slightly attenuated, and its associated circular dichroism became 20% more intense. Free Bchl added with dodecyldimethylamine oxide accelerated the restoration of Bchl-800 and retarded the attenuation of Bchl-850. We conclude that free Bchl can interact reversibly with a binding site for Bchl-800 in the B850 complex, with dodecyl sulfate favoring dissociation and dodecyldimethylamine oxide promoting association. Thus the reversible dissociation of a native chlorophyll-protein complex has now been demonstrated.
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Affiliation(s)
- R K Clayton
- Section of Plant Biology, Cornell University, Ithaca, New York 14853
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Jordanides XJ, Scholes GD, Shapley WA, Reimers JR, Fleming GR. Electronic Couplings and Energy Transfer Dynamics in the Oxidized Primary Electron Donor of the Bacterial Reaction Center. J Phys Chem B 2004. [DOI: 10.1021/jp036516x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xanthipe J. Jordanides
- Department of Chemistry, University of California, Berkeley, and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and School of Chemistry, The University of Sydney, NSW 2006, Australia
| | - Gregory D. Scholes
- Department of Chemistry, University of California, Berkeley, and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and School of Chemistry, The University of Sydney, NSW 2006, Australia
| | - Warwick A. Shapley
- Department of Chemistry, University of California, Berkeley, and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and School of Chemistry, The University of Sydney, NSW 2006, Australia
| | - Jeffrey R. Reimers
- Department of Chemistry, University of California, Berkeley, and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and School of Chemistry, The University of Sydney, NSW 2006, Australia
| | - Graham R. Fleming
- Department of Chemistry, University of California, Berkeley, and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and School of Chemistry, The University of Sydney, NSW 2006, Australia
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Hubbard J, Evans M. Electron donation by the high-potential haems in Rhodopseudomonas viridis
reaction centres at low temperatures. FEBS Lett 2001. [DOI: 10.1016/0014-5793(89)81165-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Matsuura K, Fukushima A, Shimada K, Satoh T. Direct and indirect electron transfer from cytochromescandc2to the photosynthetic reaction center in pigment-protein complexes isolated fromRhodocyclus gelatinosus. FEBS Lett 2001. [DOI: 10.1016/0014-5793(88)80163-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Woese CR, Stackebrandt E, Weisburg WG, Paster BJ, Madigan MT, Fowler VJ, Hahn CM, Blanz P, Gupta R, Nealson KH, Fox GE. The phylogeny of purple bacteria: the alpha subdivision. Syst Appl Microbiol 2001; 5:315-26. [PMID: 11541974 DOI: 10.1016/s0723-2020(84)80034-x] [Citation(s) in RCA: 240] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The technique of oligonucleotide cataloging shows the purple photosynthetic eubacteria to comprise three major subdivisions, temporarily called alpha, beta, and gamma--previously designated groups I-III by Gibson et al. (1979). Each subdivision contains a number of non-photosynthetic genera in addition to the photosynthetic ones. The alpha subdivision, the subject of the present report, contains most but not all of the species that fall into the classically defined genera Rhodospirillum, Rhodopseudomonas and Rhodomicrobium. Intermingled with these are a variety of non-photosynthetic species from genera such as Agrobacterium, Rhizobium, Azospirillum, Nitrobacter, Erythrobacter, Phenylobacterium, Aquaspirillum, and Paracoccus. The phylogenetic substructure of the alpha subdivision is presented and the evolutionary significance of the admixture of biochemical phenotypes is discussed.
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Affiliation(s)
- C R Woese
- Department of Genetics and Development, University of Illinois, Urbana 61801, USA
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Agalidis I, Ivancich A, Mattioli TA, Reiss-Husson F. Characterization of the Rhodocyclus tenuis photosynthetic reaction center. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1997. [DOI: 10.1016/s0005-2728(97)00045-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rigby SE, Nugent JH, O'Malley PJ. ENDOR and special triple resonance studies of chlorophyll cation radicals in photosystem 2. Biochemistry 1994; 33:10043-50. [PMID: 8060973 DOI: 10.1021/bi00199a031] [Citation(s) in RCA: 86] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Electron nuclear double resonance (ENDOR) and special triple (ST) resonance spectroscopies have been used to study the cation radicals of the primary donor, P680, and two secondary donor chlorophylls (Chl) in photosystem 2 (PS2). Two different preparations were employed, Tris-washed PS2 membranes and PS2 reaction centers (D1-D2-I-Cytb559 complex). One secondary donor Chl a cation radical, Chl1.+, was generated in the Tris-washed preparation, while the P680.+ radical cation and a further Chl a cation radical, Chl2.+, were produced in the reaction center preparation. The ENDOR spectrum of the primary donor radical cation of photosystem 1 (P700.+) is also presented for comparison. Hyperfine coupling constants for methyl groups have been measured for all three PS2 radical species and assigned by comparison with previously published spectra of Chl a radicals in vitro. Electron spin densities were calculated from these hyperfine couplings. Comparison of ENDOR spectral features with those of Chla.+ in vitro indicates similar values for Chl1.+ and Chl2.+ radicals but an apparent reduction in unpaired electron spin density for P680.+. It has been proposed from the more detailed studies of purple bacterial reaction centers that such a reduction in spin density can be interpreted as a delocalization over two Chl a molecules. Our calculations therefore suggest that P680.+ is a weakly coupled chlorophyll pair with 82% of the unpaired electron spin located on one chlorophyll of the pair at 15 K. Environmental or geometrical changes to the chlorin ring structure to give a novel monomeric primary donor are also possible.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- S E Rigby
- Department of Biology, University College London, U.K
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Davis IH, Heathcote P, MacLachlan DJ, Evans MC. Modulation analysis of the electron spin echo signals of in vivo oxidised primary donor 14N chlorophyll centres in bacterial, P870 and P960, and plant Photosystem I, P700, reaction centres. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1993. [DOI: 10.1016/0005-2728(93)90141-2] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tayeh MA, Madigan MT. Comparative Immunological Analyses of the Citric Acid Cycle Enzyme Malate Dehydrogenase from Phototrophic Purple Bacteria. Syst Appl Microbiol 1992. [DOI: 10.1016/s0723-2020(11)80204-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Agalidis I, Reiss-Husson F. Purification and characterization of Rhodocyclus gelatinosus photochemical reaction center. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1992. [DOI: 10.1016/s0005-2728(05)80337-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Meyer TE, Fitch JC, Bartsch RG, Tollin G, Cusanovich MA. Soluble cytochromes and a photoactive yellow protein isolated from the moderately halophilic purple phototrophic bacterium, Rhodospirillum salexigens. BIOCHIMICA ET BIOPHYSICA ACTA 1990; 1016:364-70. [PMID: 2158819 DOI: 10.1016/0005-2728(90)90170-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Three soluble cytochromes were found in two strains of the halophilic non-sulfur purple bacterium Rhodospirillum salexigens. These are cytochromes C2, C and c-551. Cytochrome C2 was recognized by the presence of positive charge at the site of electron transfer (measured by laser flash photolysis), although the protein has an overall negative charge (pI = 4.7). Cytochrome C2 has a high redox potential (300 mV) and is monomeric (13 kDa). Cytochrome c was recognized from its characteristic absorption spectrum. It has a redox potential of 95 mV, an isoelectric point of 4.3, and is isolated as a dimer (33 kDa) of identical subunits (14 kDa), a property which is typical of this family of proteins. R. salexigens cytochrome c-551 has an absorption spectrum similar to the low redox potential Rb. sphaeroides cytochrome c-551.5. It also has a low redox potential (-170 mV), is very acidic (pI = 4.5), and is monomeric (9 kDa), apparently containing 1 heme per protein. The existence of abundant membrane-bound cytochromes c-558 and c-551 which are approximately half reduced by ascorbate and completely reduced by dithionite suggests the presence of a tetraheme reaction center cytochrome in R. salexigens, although reaction centers purified in a previous study (Wacker et al., Biochim. Biophys. Acta (1988) 933, 299-305) did not contain a cytochrome. The most interesting observation is that R. salexigens contains a photoactive yellow protein (PYP), previously observed only in the extremely halophilic purple sulfur bacterium Ectothiorhodospira halophila. The R. salexigens PYP appears to be slightly larger than that of Ec. halophila (16 kDa vs. 14 kDa). Otherwise, these two yellow proteins have similar absorption spectra, chromatographic properties and kinetics of photobleaching and recovery.
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Affiliation(s)
- T E Meyer
- Department of Biochemistry, University of Arizona, Tucson 85721
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Uffen RL, Colbeau A, Richaud P, Vignais PM. Cloning and sequencing the genes encoding uptake-hydrogenase subunits of Rhodocyclus gelatinosus. MOLECULAR & GENERAL GENETICS : MGG 1990; 221:49-58. [PMID: 2325631 DOI: 10.1007/bf00280367] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Rhodocyclus gelatinosus grew photosynthetically in the light and consumed H2 at a rate of about 665 nmol/min per mg protein. The uptake-hydrogenase (H2ase) was found to be membrane bound and insensitive to inhibition by CO. The structural genes of R. gelatinosus uptake-H2ase were isolated from a 40 kb cosmid gene library of R. gelatinosus DNA by hybridization with the structural genes of uptake-H2ase of Bradyrhizobium japonicum and Rhodobacter capsulatus. The R. gelatinosus genes were localized on two overlapping DNA restriction fragments subcloned into pUC18. Two open reading frames (ORF1 and ORF2) were observed. ORF1 contained 1080 nucleotides and encoded a 39.4 kDa protein. ORF2 had 1854 nucleotides and encoded a 68.5 kDa protein. Amino acid sequence analysis suggested that ORF1 and ORF2 corresponded to the small (HupS) and large (HupL) subunits, respectively, of R. gelatinosus uptake-H2ase. ORF1 was approximately 80% homologous with the small, and ORF2 was maximally 68% homologous with the large subunit of typical membrane-bound uptake-H2ases.
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Affiliation(s)
- R L Uffen
- Biochimie Microbienne (UA 1130 CNRS) Département de Recherche Fondamentale, Centre d'Etudes Nucléaires, Grenoble, France
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Reaction center-B870 pigment protein complexes with bound cytochromes c-555 and c-551 from Rhodocyclus gelatinosus. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1988. [DOI: 10.1016/0005-2728(88)90074-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kiley PJ, Kaplan S. Molecular genetics of photosynthetic membrane biosynthesis in Rhodobacter sphaeroides. Microbiol Rev 1988; 52:50-69. [PMID: 3280966 PMCID: PMC372705 DOI: 10.1128/mr.52.1.50-69.1988] [Citation(s) in RCA: 121] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Evans MC. Evidence for two Qa-like quinone binding sites in the reaction centre of Rhodopseudomonas viridis. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1987. [DOI: 10.1016/0005-2728(87)90132-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Uffen RL. Influence of pH, O2, and temperature on the absorption properties of the secondary light-harvesting antenna in members of the family Rhodospirillaceae. J Bacteriol 1985; 163:943-50. [PMID: 3928601 PMCID: PMC219224 DOI: 10.1128/jb.163.3.943-950.1985] [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: 01/08/2023] Open
Abstract
In some Rhodospirillaceae, the primary light-harvesting (LH I) antenna absorbs near-infrared light around 870 nm, whereas LH II (holochrome B800-860) has a major absorption band between 850 and 860 nm (B860) and a minor absorbancy around 800 nm (B800). Results show that, unlike LH I, holochrome B800-860 (LH II) exhibits unstable light absorption properties in whole cells. This was observed in Rhodopseudomonas capsulata grown anaerobically in light in weakly buffered carbohydrate medium; cultures lost both carotenoid-dependent brown-yellow pigmentation and LH II absorbancy. The whole cell spectrophotometric changes were attributed to mild acid conditions generated during sugar metabolism. LH II absorbancy was also destroyed in both R. capsulata and Rhodopseudomonas gelatinosa when cultures growing at neutral pH were acidified to a pH value around 5.0 with HCl. In contrast, during the same time period of exposure to pH 5.0, only a 50% decrease in Rhodopseudomonas sphaeroides LH II B800 absorbancy was measured. At neutral pH, LH II absorbancy in suspensions of nongrowing Rhodopseudomonas spp. was also sensitive to O2 exposure and to incubation at 30 to 40 degrees C. During treatment with O2, the rate of LH II B800 absorption decrease in R. gelatinosa and R. sphaeroides was 60 and 40% per h, respectively, compared with their absorbancy maximum around 860 nm. Both 860-nm absorbancy and the total bacteriochlorophyll content of the cells remained unchanged. On the other hand, no significant decrease in B800 if LH II in R. capsulata occurred during O2 exposure, but a 20% absorption decay rate per h of B800 was observed in cells incubated anaerobically at 40 degrees C. These B800 LH II spectral changes Rhodopseudomonas spp. were prevented by maintaining cells at neutral pH and at 10 degrees C. The near-infrared absorption spectrum of Rhodospirillum rubrum, which does not form LH II, was not significantly influenced by these different pH, aerobic, or temperature conditions.
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Drews G. Structure and functional organization of light-harvesting complexes and photochemical reaction centers in membranes of phototrophic bacteria. Microbiol Rev 1985; 49:59-70. [PMID: 3884995 PMCID: PMC373017 DOI: 10.1128/mr.49.1.59-70.1985] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Cogdell RJ, Zuber H, Thornber J, Drews G, Gingras G, Niederman RA, Parson WW, Feher G. Recommendations for the naming of photochemical reaction centres and light-harvesting pigment-protein complexes from purple photosynthetic bacteria. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1985. [DOI: 10.1016/0005-2728(85)90095-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Jacob JS, Miller KR. Structure of a bacterial photosynthetic membrane. Isolation, polypeptide composition, and selective proteolysis. Arch Biochem Biophys 1983; 223:282-90. [PMID: 6859862 DOI: 10.1016/0003-9861(83)90593-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A procedure for the isolation of highly purified bacterial photosynthetic membranes from Rhodopseudomonas viridis is described. The purity of the final membrane fraction has been confirmed by electron microscopy. Seven major polypeptide bands are associated with the photosynthetic membranes, and all seven are resistant to solubilization in Triton X-100 detergent. Two pigmented bands with apparent molecular weights of 44K and 41K are thought to be cytochromes. The three polypeptides with apparent molecular weights of 38K, 32K, and 28K have been reported in reaction center preparations of other laboratories. Two low-molecular-weight (16K and 11K) bands bind bacteriochlorophyll b and may represent light-harvesting bacteriochlorophyll-protein complexes. The structures that were isolated seem to represent complete photosynthetic membranes, consisting of reaction center, electron transport, and light-harvesting components, all arranged in the regular lattice characteristic of viridis. Selective proteolysis of these membranes indicates that all membrane components are accessible to digestion by trypsin and pronase, except for the light-harvesting complexes.
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Vol'pin M, Novodarova G, Kolosova E, Guzhova N, Kononenko A, Lejkin Y. Transition metal complexes as catalysts in biochemical systems. Interaction with electron transfer processes. Inorganica Chim Acta 1981. [DOI: 10.1016/s0020-1693(00)83717-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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[15] Bacterial reaction center (RC) and photoreceptor complex (PRC) preparations. Methods Enzymol 1980. [DOI: 10.1016/s0076-6879(80)69017-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Kirschenbaum DM. Molar absorptivity and A1%1 cm values for proteins at selected wavelengths of the ultraviolet and visible regions--XVIII. THE INTERNATIONAL JOURNAL OF BIOCHEMISTRY 1980; 11:487-500. [PMID: 6991306 PMCID: PMC7111548 DOI: 10.1016/0020-711x(80)90257-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/02/1979] [Indexed: 01/22/2023]
Abstract
A table of molar absorptivity and A1cm1% values for more than 180 proteins is given. The conditions used to obtain these values and references to the original literature are also'given.
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Snozzi M, Bachofen R. Characterisation of reaction centers and their phospholipids from Rhodospirillum rubrum. BIOCHIMICA ET BIOPHYSICA ACTA 1979; 546:236-47. [PMID: 109118 DOI: 10.1016/0005-2728(79)90042-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
1. Reaction centers from Rhodospirillum rubrum have been extracted with the zwitterionic detergent lauryl dimethyl amine oxide. Subsequent purification has been achieved by gel filtration and ion-exchange chromatography. The pure reaction centers are composed of three protein subunits (L, M, H), bacteriocholorophyll and bacteriopheophytin in the ratio 2 : 1 and phospholipids. 2. The phospholipid composition has been found to be similar to that of whole chromatophore membrane, except that diphosphatidyl glycerol is present in higher amount in the isolated complex. When the detergent treatment of the chromatophore membrane is done in the presence of NaCl, a lower phospholipid content in isolated reaction centers has been found together with a lower stability in the association among the protein subunits. In this complex, the largest subunit H is easily split off and a LM complex is obtained. It is concluded that the phospholipids play an important role in the stability of reaction center complexes.
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Gibson J, Stackebrandt E, Zablen LB, Gupta R, Woese CR. A phylogenetic analysis of the purple photosynthetic bacteria. Curr Microbiol 1979. [DOI: 10.1007/bf02603136] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Clayton RK, Clayton BJ. Molar extinction coefficients and other properties of an improved reaction center preparation from Rhodopseudomonas viridis. BIOCHIMICA ET BIOPHYSICA ACTA 1978; 501:478-87. [PMID: 629961 DOI: 10.1016/0005-2728(78)90115-9] [Citation(s) in RCA: 83] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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