ライフサイエンスコーパス: reaction center

1 antenna size, enhanced connectivity between reaction centers).

2 anced yield of 27% in a QHE motivated by the reaction center.

3 ar to those of PioC, is unable to reduce the reaction center.

4 s as an organizational template for the PSII reaction center.

5 e D1 and CP43 intrinsic subunits of the PSII reaction center.

6 ant ferrous iron forms to the photosynthetic reaction center.

7 anisms is a transmembrane protein called the reaction center.

8 lso demonstrated a stabilizing effect of the reaction center.

9 and D2 together build up the photosystem II reaction center.

10 harvest solar energy and transport it to the reaction center.

11 sing a substituent at a remote site from the reaction center.

12 to those observed within the photosynthetic reaction center.

13 due to the catalytic power of the N-terminal reaction center.

14 ndent mechanism that involves the N-terminal reaction center.

15 und entities of the bacterial photosynthetic reaction center.

16 the newly integrated D1 protein in the PSII reaction center.

17 laser-induced charge separation in the PSII reaction center.

18 agement of DMATase-tRNA interaction near the reaction center.

19 5 dimer cation radical in the Rb sphaeroides reaction center.

20 ochemical information from the ligand to the reaction center.

21 ntly direct energy toward the photosynthetic reaction center.

22 sualization of the coherence dynamics in the reaction center.

23 er intrinsic proteins remaining bound to the reaction center.

24 cially the dissociation of cyt c(2) from the reaction center.

25 ectrons ortho to the dithiolanone-oxide (S1) reaction center.

26 between an artificial antenna system and the reaction center.

27 se network of antenna complexes and into the reaction center.

28 a proposed charge transfer (CT) state in the reaction center.

29 hotochemical quenching in the red algal PSII reaction center.

30 creases the transfer of excess energy to the reaction centers.

31 sunlight and providing it to photosynthetic reaction centers.

32 ng covalent bonding interactions between the reaction centers.

33 ent of that of the special pair in bacterial reaction centers.

34 te in Rhodobacter sphaeroides photosynthetic reaction centers.

35 f harmful chemical species by photosynthetic reaction centers.

36 r reduction potential when present in type I reaction centers.

37 one species can perform diverse functions in reaction centers.

38 that are widely exploited by photosynthetic reaction centers.

39 is senses the imbalance in the excitation of reaction centers.

40 nt funneling of the excitation energy to the reaction centers.

41 trolling the activities and selectivities of reaction centers.

42 yll content but a lower percentage of active reaction centers.

43 antenna complexes from photosystem II (PSII) reaction centers.

44 shuttles a phosphoryl group between the two reaction centers.

45 c conditions, and had chlorosomes and type 1 reaction centers.

46 y the membrane morphology and the closure of reaction centers.

47 harge separation unit akin to photosynthetic reaction centers.

48 and N-4 atoms as well as the 3-NH2 group as reaction centers.

49 ng in PSI a situation that occurs in type II reaction centers.

50 del light-harvesting systems integrated with reaction centers.

51 n crystals provide a high density of aligned reaction centers.

52 ntenna, but ultimately photoinactivated PSII reaction centers.

53 nment in natural and (15)N uniformly labeled reactions centers.

54 e zeaxanthin in the LHCI antenna and the PSI reaction center; (2) structural remodeling of the LHCI a

55 The reaction center 5'-guanosine appears to be part of a hel

56 th functional in energy transfer to the PSII reaction center, a homotrimer of CP26 and a heterotrimer

57 t the Cys(2) mutant enzyme or the N-terminal reaction center alone can reduce Se-containing substrate

58 icient LH1 complex with complexes containing reaction centers also demonstrated a stabilizing effect

59 the first time a detailed description of the reaction center and antenna system from mesophilic cyano

60 x is located on the lumenal side of the PSII reaction center and contains manganese, calcium, and chl

61 or the ET complex between the photosynthetic reaction center and cytochrome c(2).

62 utionary link between the cyanobacterial PSI reaction center and its green algal/higher plant counter

63 ing atomic properties of atoms in a putative reaction center and molecular properties as features, we

64 L-arginine structure and might orient the reaction center and participate in proton transfer.

65 zyme reactions at three levels: bond change, reaction center and reaction structure similarity.

66 h is located on the lumenal side of the PSII reaction center and which contains manganese, calcium, a

67 or the assembly of functional photosynthetic reaction centers and antenna complexes.

68 embrane-embedded super-complexes, containing reaction centers and connected antennae.

69 ential energy sinks able to compete with the reaction centers and drastically undermine light-harvest

70 phycobilisomes transfer excitation energy to reaction centers and how the energy balance of two photo

71 on of ferrous iron were studied in wild-type reaction centers and in mutants that have been modified

72 the concentration of charge-separating PSII reaction centers and more than half of these contained p

73 Reaction centers and surrounding local structures in sub

74 hat electron transfer between photosynthetic reaction centers and the associated electrochemical prot

75 wo beta-carotene molecules in photosystem II reaction centers and the two luteins in the major photos

76 green sulfur bacteria (containing the type I reaction center) and Clostridia (forming heat-resistant

77 vesting complexes 1 and 2, the photochemical reaction center, and the cytochrome bc(1) complex descri

78 hlorins bound to the polypeptides within the reaction center are lost, and are replaced by features t

79 oordinated with translation of the substrate reaction center are seen to favor the forward progress o

80 to determine how photosynthetic antennae and reaction centers are activated in the ground state to pe

81 ble radical pair formation when photovoltaic reaction centers are embedded throughout light-harvestin

82 Direct comparisons show that reaction centers are more stable in this copolymer/lipid

83 -type reaction centers, the highly oxidizing reaction centers are not stable in the light unless they

84 Reaction centers are pigment-protein complexes that driv

85 Photosynthetic reaction centers are sensitive to high light conditions,

86 In this paper, the Mn-binding reaction centers are shown to have a light-driven enzyma

87 vesicles embedding an oriented population of reaction centers, are capable of generating a photoinduc

88 ential turnover of the photosystem II (PSII) reaction center as a function of O(2) pressures, we show

89 pling of the phycobilisome (PBS) to the PSII reaction center as determined by observing the changes i

90 ilar effect on the reactivity of carbanionic reaction centers as alkoxycarbonyl substitution.

91 CC 6803 important for formation of the D1/D2 reaction center assembly complex.

92 Photosystem I (PSI) is a reaction center associated with oxygenic photosynthesis.

93 roduced by mutagenesis into highly oxidizing reaction centers at a site homologous to the manganese-b

94 ecrease the amount of energy arriving at the reaction centers by increasing thermal energy dissipatio

95 sm that decreases the energy arriving at the reaction centers by increasing thermal energy dissipatio

96 We hypothesize that the N-terminal reaction center can reduce substrates (i) with good leav

97 ously, site-specific mutagenesis has yielded reaction centers capable of transmembrane charge separat

98 d in a 2.2-fold increase in the formation of reaction center charge-separated state upon intensity-li

99 ater-oxidizing complex (WOC) and half of the reaction center cofactors, and it is present as two isof

100 e peripheral light-harvesting antenna to the reaction center complex by taking advantage of quantum c

101 unctional mimics of a photosynthetic antenna-reaction center complex comprising five bis(phenylethyny

102 thods, a biomimetic bacterial photosynthetic reaction center complex has been constructed, and photoi

103 The core reaction center complex is composed of the D1, D2, CP43,

104 electronic energy by the pigments facing the reaction center complex.

105 ome b559, an essential component of the PSII reaction-center complex.

106 sting regulation is important for protecting reaction center complexes from overexcitation, generatio

107 n light harvesting complexes LH2 and LH1/RC (reaction center) complexes has been investigated in memb

108 II (oxygenic and nonoxygenic, respectively) reaction centers contain quinone cofactors that serve ve

109 nd photochemical properties of an artificial reaction center containing two porphyrin electron donor

110 g light absorption (effective cross-section, reaction center content) and utilization (photochemical

111 Photosynthetic reaction centers convert excitation energy from absorbed

112 Photosynthetic reaction centers convert light energy into chemical ener

113 Photosynthetic reaction centers convert sunlight into a transmembrane e

114 he P700 (+) formation was observed in a PS I reaction center core preparation from Nostoc punctiforme

115 complex comprised only two polypeptides: the reaction center core protein PscA and a 22-kDa carotenoi

116 entirely different mode of binding with the reaction center core than PsaC, its counterpart in Photo

117 uggesting that the functionality of the PSII reaction center could not be recovered in the absence of

118 Thus, this HTCS functions as a metabolic reaction center, coupling nutrient sensing to dynamic re

119 study of primary electron transfer in single reaction center crystals from Rhodobacter sphaeroides.

120 es reactions lead to oxidative damage of the reaction center, D1 protein turnover, and inhibition of

121 A comparison of a reaction-center-deficient LH1 complex with complexes con

122 It has been found that the reaction center (defined as the organometallic fragment

123 ng energetic coupling of the PBS to the PSII reaction center depends upon the formation of an active

124 ation in native photosystem I photosynthetic reaction centers does occur in the inverted region, at b

125 borne out in the present all-supramolecular "reaction center" donor-acceptor mimic.

126 meters that dictate the efficiency of dye-to-reaction center energy transfer and subsequent charge se

127 after light activation of the photosynthetic reaction center, especially the dissociation of cyt c(2)

128 Thus, the overall B800-->B850-->B890--> Reaction Center ET cascade is well described by simple t

129 Successful artificial photosynthetic reaction centers for solar energy conversion have simila

130 I intron catalysis: the oxygen atoms at the reaction center form multidentate interactions that func

131 ochrome c oxidase, consists of a hydrophobic reaction center formed by three mitochondrially encoded

132 The Type I homodimeric photosynthetic reaction center found in anaerobic gram-positive bacteri

133 ns, the ET between cytochrome c(2) (cyt) and reaction center from photosynthetic bacteria, is the foc

134 e-induced denaturation of the photosynthetic reaction center from Rhodobacter sphaeroides has been st

135 allization of a his-tagged membrane protein, Reaction Center from Rhodobacter sphaeroides, performed

136 In the photosynthetic reaction center from Rhodobacter sphaeroides, the primar

137 e semiquinone QA*- in the well-characterized reaction center from the photosynthetic bacterium Rhodob

138 s near the primary electron donor (P) of the reaction center from the purple photosynthetic bacterium

139 We have previously demonstrated that reaction centers from anoxygenic photosynthetic bacteria

140 Photosynthetic reaction centers from Rhodobacter sphaeroides have ident

141 Photosynthetic reaction centers from Rhodobacter sphaeroides have three

142 have been studied in Rhodobacter sphaeroides reaction centers from wild type and 14 mutants in which

143 pt abundance of two important photosynthetic reaction center genes, psbA (encoding the D1 protein of

144 tion process of the bacterial photosynthetic reaction center has been trapped in two D(LL)-based Rhod

145 enyl group, which directly conjugates with a reaction center having S(N)1 character in the ts.

146 emoved from the Heliobacterium modesticaldum reaction center (HbRC), resulting in 15 ms lifetime char

147 t Arg256 plays a key role in maintaining the reaction center hydrogen-bonding network involving the t

148 The presence of 60% of these genes in both reaction center I (RC-I) and RC-II-type bacteria may be

149 These reaction centers illustrate the successful design of a r

150 and total power transferred to a biomimetic reaction center in an existing seven-helix double strand

151 ot only acts as direct electron donor to the reaction center in anoxygenic phototrophs but can also b

152 tuent from the cyclopropane is away from the reaction center in both pathways, and low regioselectivi

153 rodes and the spinach photosystem II (PS II) reaction center in lipid films for the first time.

154 facile reconstitution of the photosynthetic reaction center in the artificial lipid membrane, obtain

155 ies were found to be clear-cut, although the reaction center in these reactions is one covalent bond

156 Unlike the monomeric reaction centers in green and purple bacteria, PSI forms

157 em II (PS II) is unique among photosynthetic reaction centers in having secondary electron donors tha

158 iven transformation, the local structures of reaction centers in substrates and products can be chara

159 ction course due to the change of one of the reaction centers in the 2-cyanothioacetamide (C-C-N buil

160 antenna and thus the photochemical yield at reaction centers in the functional thylakoid membrane.

161 molecular distance between two photochemical reaction centers in the molecule.

162 n complex (WOC) of the photosystem II (PSII) reaction center is a light-driven process, termed photoa

163 The subsequent energy transfer to the reaction center is commonly rationalized in terms of exc

164 One electron charge separation in the PSII reaction center is coupled to sequential oxidation react

165 moiety, the solvent distribution around the reaction center is nearly the same.

166 n complex (WOC) of the photosystem II (PSII) reaction center is termed photoactivation and culminates

167 n complex (WOC) of the photosystem II (PSII) reaction center is termed photoactivation.

168 The Photosystem II reaction center is vulnerable to photoinhibition.

169 onstrate that the amount of functional PS II reaction centers is compromised in the plants that exhib

170 as an antenna conjugated to a photosynthetic reaction center isolated from Rhodobacter sphaeroides 2.

171 lls and an iron-sulfur cluster; unlike other reaction centers, it lacks a bound quinone.

172 onarily related to photosystem II, bacterial reaction centers lack both a strong oxidant and a mangan

173 hoto-induced electron transfer events in the reaction center lead to the accumulation of oxidizing eq

174 d a unique organization of arrays of dimeric reaction center-light harvesting I-PufX (RC-LH1-PufX) co

175 orption spectroscopy on membranes containing reaction center-light-harvesting 1-PufX (RC-LH1-PufX) co

176 s in agreement with rates observed in mutant reaction centers modified to remove shortrange hydrophob

177 ectron transport chain (ETC), and hence PSII reaction centers, more oxidized.

178 of the Blastochloris viridis photosynthetic reaction center, observing an ultrafast global conformat

179 erved electroactivity is from FAD, the redox reaction center of GOx.

180 The photosynthetic reaction center of Heliobacterium modesticaldum (HbRC) w

181 es" that discharge unwanted electrons in the reaction center of higher plants.

182 by a pseudo-C2 symmetry, are present in the reaction center of photosystem I (PSI).

183 d P700 similar to what has been found in the reaction center of PS II.

184 acid at position M210 in the photosynthetic reaction center of Rhodobacter sphaeroides results in th

185 rences in the photoresponse of the bacterial reaction center of Rhodobacter sphaeroides.

186 litates proton delivery from the bulk to the reaction center of the protein.

187 made by electrically connecting, or wiring, reaction centers of bilirubin oxidase to carbon with an

188 special pair) at the heart of photosynthetic reaction centers of both plants and bacteria.

189 at harbors the iron-sulfur clusters from the reaction centers of Heliobacterium modesticaldum.

190 ical features of a HiPIP, and can reduce the reaction centers of membrane suspensions in a light-depe

191 s to survive and grow, light can also damage reaction centers of photosystem II (PSII) and reduce pho

192 hesis mediates electron transfer between the reaction centers of photosystems I and II and facilitate

193 In reaction centers of Rhodobacter sphaeroides, site-direct

194 Bacterial reaction centers offer a rare opportunity to compare the

195 Photosynthetic reaction centers operate in organisms ranging from bacte

196 In the modified reaction centers, P+ was reduced by iron in the presence

197 n transfer from plastocyanin to the oxidized reaction center P700 (+).

198 Type I homodimeric reaction centers, particularly the class present in heli

199 a functional replacement exists to link the reaction center photochemistry to cyclic electron transf

200 esolution x-ray structure of the homodimeric reaction center-photosystem from the phototroph Heliobac

201 Exploitation of natural photovoltaic reaction center pigment proteins in biohybrid architectu

202 osystem I (PSI) is one of two photosynthetic reaction centers present in plants, algae, and cyanobact

203 t to the chlorophylls in the vicinity of the reaction center, previously shown to optimize the quantu

204 large extrinsic loop of Photosystem II CP43 reaction center protein (CP43) in the PSII-OEC extrinsic

205 large extrinsic loop of Photosystem II CP47 reaction center protein (CP47) from the putative oxygen-

206 and replacing the photoinactivated D1/32-kD reaction center protein (the chloroplast-encoded psbA ge

207 in degradation of the photosystem II (PSII) reaction center protein D1 upon repair of photodamaged P

208 of FtsH protease in vivo, the photosystem II reaction center protein D1, is not efficiently removed b

209 n accelerates turnover and synthesis of PSII reaction center protein D1.

210 The D1 reaction center protein is the main target for photodama

211 d in the vicinity of LHCII and the PSII CP43 reaction center protein.

212 ts revealed impaired synthesis of the PsaA/B reaction center proteins of PSI, which was accompanied b

213 e preserves characteristics of the ancestral reaction center, providing insight into the evolution of

214 e electronic structure of the photosystem II reaction center (PSII RC) in relation to the light-induc

215 c (vibronic) coherence in the Photosystem II Reaction Center (PSII RC) indicates that photosynthetic

216 Here, we demonstrate that reaction centers purified using a styrene maleic acid co

217 eta-carotene endoperoxide points at the PSII reaction centers, rather than the PSII chlorophyll anten

218 orrespond to a light-harvesting-complex 2 to reaction center ratio of 3:1.

219 LH1 directly surrounds the reaction center (RC) and, together with PufX, forms a di

220 ting 2 (LH2) complex relative to that of LH1-reaction center (RC) core particles.

221 sition and electron-transfer kinetics of the reaction center (RC) from a magnesium chelatase (bchD) m

222 Reaction Center (RC) from Blastochloris viridis was used

223 The photosynthetic reaction center (RC) from purple bacteria converts light

224 The reaction center (RC) from Rhodobacter sphaeroides captur

225 hrome c(2) (cyt c(2)) and the photosynthetic reaction center (RC) from Rhodobacter sphaeroides exhibi

226 nsfer proteins cytochrome c(2) (cyt) and the reaction center (RC) from Rhodobacter sphaeroides was st

227 l oxygens of the semiquinone Q(A)(.-) in the reaction center (RC) from the photosynthetic purple bact

228 e light-harvesting B808-866 complex, and the reaction center (RC) in the thermophilic green phototrop

229 resent studies on a series of photosynthetic reaction center (RC) mutants created in the background o

230 e secondary quinone (QB) binding site of the reaction center (RC) of the photosynthetic bacterium Rho

231 action between cytochrome c(2) (cyt) and the reaction center (RC) was studied to determine the mechan

232 In the purple bacterial reaction center (RC), a highly efficient ultrafast charg

233 omplexes: the light-harvesting (LH) antenna, reaction center (RC), and core complex (RC-LH).

234 ding light harvesting complexes LH1 and LH2, reaction center (RC), and cytochrome bc(1).

235 In the native purple bacterial reaction center (RC), light-driven charge separation uti

236 igments and transfer from the antenna to the reaction center (RC), where charge separation occurs.

237 ripheral chlorosome antenna complex with the reaction center (RC), which is embedded in the cytoplasm

238 protein-bound bacteriochlorophylls, and the reaction center (RC), which uses the light-excitation en

239 ting LH2 complexes and monomeric and dimeric reaction center (RC)-light-harvesting 1 (LH1)-PufX "core

240 orophototroph that has a type-I, homodimeric reaction center (RC).

241 ormation in single crystals of the bacterial reaction center (RC).

242 nsfer via a series of redox cofactors of the reaction center (RC).

243 rsible charge separation taking place in the reaction center (RC).

244 or local conformational changes in bacterial reaction centers (RC) associated with the electron-trans

245 5(+)Q(-)A in purple photosynthetic bacterial reaction centers (RC).

246 em I (PSI) protein complex (not the isolated reaction center, RCI), on two different "director SAMs"

247 2 ns in intact thylakoid membranes when PSII reaction centers (RCIIs) are closed (Fm).

248 rred at normal rates, but heterodimeric PSII reaction centers (RCs) and higher order PSII assemblies

249 Reaction centers (RCs) are integral membrane proteins th

250 in frozen and quinone-blocked photosynthetic reaction centers (RCs) as modification of magic-angle sp

251 Bacterial reaction centers (RCs) catalyze a series of electron-tra

252 or-specific photochemistry in photosynthetic reaction centers (RCs) from Rhodobacter sphaeroides was

253 -induced electron transfer in photosynthetic reaction centers (RCs) of the purple bacterium Rhodobact

254 light-harvesting complexes, LH1 and LH2, and reaction centers (RCs).

255 reactions are an indicator of the extent of reaction-center rehybridization at the transition state.

256 The structures of reaction centers reveal two symmetry-related branches of

257 photosynthetic pigments, including those of reaction center special pairs and possibly quantum coher

258 After illumination of wild-type reaction centers, steady-state optical spectroscopy show

259 ry of a homodimer is broken in heterodimeric reaction-center structures, such as those reported previ

260 -color photon echo experiment on a bacterial reaction center that enabled direct visualization of the

261 iation by transferring the excitation to the reaction center that stores energy from the photon in ch

262 m could, in principle, reflect a fraction of reaction centers that contain PsaC bound in the 180 degr

263 diminishes the likelihood of photodamage to reaction centers that have either lost an intact Mn clus

264 substantially decrease the fraction of PSII reaction centers that undergo the S(3) to S(0) transitio

265 Unlike wild-type reaction centers, the highly oxidizing reaction centers

266 ggests that in Photosystem I, unlike type II reaction centers, the relative efficiency of the two bra

267 The enzyme contains two remotely located reaction centers: the nucleotide partial reaction takes

268 modimer; in contrast to F(X) in other type I reaction centers, this [4Fe-4S] cluster exhibits an S =

269 tance of the presence of void space near the reaction center to facilitate the large volume change du

270 The use of photochemical reaction centers to convert light energy into chemical e

271 er and low enough for quinone diffusion from reaction centers to cytochrome bc(1) complexes.

272 echanisms to decrease the energy arriving at reaction centers to protect themselves from high irradia

273 proton transfer in bacterial photosynthetic reaction centers to those calculated using our coarse-gr

274 of phototrophic mechanisms in the Bacteria: reaction center type 1 (RC1) has core and core antenna d

275 t are parts of a single polypeptide, whereas reaction center type 2 (RC2) is composed of short core p

276 es the energy arriving at the photosynthetic reaction centers under high-light conditions.

277 re functionally asymmetric; purple bacterial reaction centers use the A pathway exclusively.

278 s transferred from photosynthetic antenna to reaction centers via ultrafast energy transfer.

279 verage number of DNA three-arm junctions per reaction center was tuned from 0.75 to 2.35.

280 ory of RC1 in which an initially homodimeric reaction center was vertically transmitted to green sulf

281 ld type the ratio of PS IIalpha to PS IIbeta reaction centers was approximately 1.2 while in the muta

282 that the amount of functional photosystem II reaction centers was compromised in the plants that exhi

283 n) of a series of triterpenoids with Michael reaction centers were closely correlated with the potenc

284 through a series of antenna complexes to the reaction center where charge separation occurs.

285 nsfer energy from sunlight to photosynthetic reaction centers where charge separation drives cellular

286 Most of the energy is transferred to reaction centers where it is used for charge separation.

287 enna complexes, and energy is transferred to reaction centers where photochemical reactions take plac

288 ptures solar energy and transports it to the reaction center, where charge separation occurs.

289 diffusion length of 50 nm until it reaches a reaction center, where charge separation serves as an en

290 d by the dye molecules is transferred to the reaction center, where charge separation takes place.

291 sfer of the nascent excitation energy to the reaction centers, where long-term storage as chemical en

292 Genuine PshB was dissociated from the reaction center with 1 M NaCl and purified using an affi

293 us moves energy from absorbed photons to the reaction center with remarkable quantum efficiency.

294 ectron photochemistry occurring at the PS II reaction center with the four-electron water-oxidation c

295 nsfer from Q(A)(-) to Q(B) in Photosystem II reaction centers with an occupied Q(B) site was slowed b

296 succeeded in the discovery of several mutant reaction centers with increased efficiency of the B path

297 he phycobilisome supports directional EET to reaction centers with minimal losses due to thermal diss

298 al design principles for engineering of PSII reaction centers with optimal photochemical efficiencies

299 d Q(B) sites, using samples of (15)N-labeled reaction centers, with the native high spin Fe(2+) excha

300 enzymatic ability of this type of Mn-binding reaction centers would have provided primitive phototrop