ライフサイエンスコーパス: xanthophyll

1 the ring, presumably oxygenated carotenoids (xanthophylls).

2 erent pigments (carotenes, chlorophylls, and xanthophylls).

3 and metabolism of other carotenoids such as xanthophyll.

4 and a 35% reduction in beta-carotene-derived xanthophylls.

5 ts containing all essential nutrients but no xanthophylls.

6 in rhesus monkeys with no previous intake of xanthophylls.

7 STM1, exhibited only low affinity binding of xanthophylls.

8 ectively eliminate and substitute a range of xanthophylls.

9 endent on the presence of protein, Chls, and xanthophylls.

10 model best fitted the degradation curves of xanthophylls.

11 re is unable to synthesize any carotenes and xanthophylls.

12 fferent carotenoid isomers, including linear xanthophylls.

13 alpha- and beta-carotenes but were devoid in xanthophylls.

14 is mediated by the PsbS protein and various xanthophylls.

15 00 subjects for HPLC quantification of serum xanthophylls.

16 eas peripheral light-harvesting systems bind xanthophylls.

17 , being higher for carotenes (4.1%) than for xanthophylls (1.6%, p<0.01), and were higher for the co-

18 l fluorescence intensities indicate that the xanthophylls act on antenna, not reaction center process

19 t from the enzyme systems operating in vivo (xanthophyll acyl transferase).

20 Evidences for a preferential xanthophyll acyltransferase activity regarding the posit

21 this particular structural configuration of xanthophylls against oxidation.

22 /w) ethanol, 3mL/min flow rate and 30min for xanthophylls (all-trans-lutein, all-trans-zeaxanthin and

23 g DHAR expression increased the pool size of xanthophyll and chlorophyll pigments as well as the rate

24 onified extract 21 carotenoids, including 11 xanthophylls and 10 carotenes were detected.

25 s procedures--using a strong base to recover xanthophylls and a weak base to recover astaxanthin--sho

26 ha-carotene and to a lesser extent genes for xanthophylls and apocarotenoids biosynthesis.

27 o 0.0720 mug g(-1) DM) and over 15 different xanthophylls and carotene isomers.

28 between Chl b and Chl a and between specific xanthophylls and Chl a in the complexes.

29 Xanthophylls and n-3 fatty acids are essential for the d

30 ht rhesus monkeys with no lifelong intake of xanthophylls and no detectable macular pigment.

31 fit from increased dietary intake of macular xanthophylls and omega-3 fatty acids.

32 randomized to receive supplementary macular xanthophylls and omega-3 LC-PUFAs after 1 month of inter

33 thophyll-free monkeys can accumulate retinal xanthophylls and provide a valuable model for examining

34 uire a low thylakoid lumen pH, de-epoxidized xanthophylls, and the photosystem II protein PsbS.

35 hen additional antioxidant roles of specific xanthophylls are evident.

36 Xanthophylls are oxygenated carotenoids that perform cri

37 Carotenes, and their oxygenated derivatives xanthophylls, are essential components of the photosynth

38 otenes and their oxygenated derivatives, the xanthophylls, are structural determinants in both photos

39 utant plants deficient in one or both of the xanthophylls as well as a transgenic line that accumulat

40 Here, we studied the role of xanthophylls, as distinct from that of carotenes, by cha

41 We conclude that xanthophylls, besides their role in photoprotection and

42 tenoid ratios, pool sizes of photoprotective xanthophylls, beta-carotene, and stored volatile isopren

43 ight-harvesting complexes by protonation and xanthophyll binding is presented.

44 etina are thought to be mediated by specific xanthophyll-binding proteins (XBPs).

45 human foveal region are mediated by specific xanthophyll-binding proteins such as GSTP1 which has pre

46 d is correctly folded with chlorophyll a and xanthophylls but without chlorophyll b, an essential chr

47 s and photoprotection, distinct from that of xanthophylls, by characterizing the suppressor of zeaxan

48 thin constitutively, have reported that this xanthophyll can efficiently induce chlorophyll fluoresce

49 Zeaxanthin, an optically inactive nondietary xanthophyll carotenoid present in the human macula, exhi

50 Lutein is a xanthophyll carotenoid with potent antioxidant activity.

51 In contrast, xanthophyll carotenoids (galloxanthin, zeaxanthin, lutei

52 The xanthophyll carotenoids (lutein and zeaxanthin) are hypo

53 mented absorption and tissue accumulation of xanthophyll carotenoids and tocopherols.

54 nation for how primates uniquely concentrate xanthophyll carotenoids at high levels in retinal tissue

55 diet, and physical and health predictors of xanthophyll carotenoids in the retina are poorly underst

56 Uptake, metabolism, and stabilization of xanthophyll carotenoids in the retina are thought to be

57 suggests that uptake and transport of these xanthophyll carotenoids into the human foveal region are

58 The xanthophyll carotenoids lutein and zeaxanthin, along wit

59 na uniquely concentrates high amounts of the xanthophyll carotenoids lutein, zeaxanthin, and meso-zea

60 provide the first experimental evidence that xanthophyll carotenoids protect photoreceptors in vivo.

61 used to record resonance Raman signals from xanthophyll carotenoids stored in the retinal pigment ep

62 Xanthophyll carotenoids were more efficiently transferre

63 hermophilum" chlorosomes contained two major xanthophyll carotenoids, echinenone and canthaxanthin.

64 rotenoids by human BCO2 prevents cleavage of xanthophyll carotenoids.

65 Other mammalian xanthophyll carrier proteins such as tubulin, high-densi

66 affinity, and they failed to induce or alter xanthophyll CD spectra to any significant extent.

67 gradation kinetics of the major blood orange xanthophylls (cis-violaxanthin, lutein, beta-cryptoxanth

68 Collectively, the xanthophyll class of carotenoids perform a variety of cr

69 so known as BCDO2), the only known mammalian xanthophyll cleavage enzyme.

70 nts, suggesting that qE capacity rather than xanthophyll composition is critical for photoprotection

71 The xanthophyll composition of higher plant photosystems (lu

72 rabidopsis thaliana mutants that differed in xanthophyll composition were more photoinhibited than th

73 orescence intensity correlates with both the xanthophyll concentration and the fractional intensity o

74 Changes in the xanthophyll concentration do not significantly affect th

75 rtion has recently been proposed to underlie xanthophyll concentration in the macula of the primate r

76 Increasing the xanthophyll concentration in the presence of a pH gradie

77 s the combined effect of the pH gradient and xanthophyll concentration, resulting in the formation of

78 dietary recalls were correlated with plasma xanthophyll concentrations (lutein + zeaxanthin and beta

79 here is no significant difference (p>0.1) in xanthophyll content between fresh leafy and non-leafy sa

80 lting in a significant difference (p<0.1) in xanthophyll content between the two groups.

81 In plants, the xanthophyll cycle (the reversible interconversion of two

82 ants without AtCGL160 display an increase in xanthophyll cycle activity and energy-dependent nonphoto

83 An increase in xanthophyll cycle activity and the generation of reactiv

84 content and ascorbic acid in parallel to the xanthophyll cycle activity.

85 A functional xanthophyll cycle and a rapidly reversible NPQ component

86 idase and superoxide dismutase together with xanthophyll cycle and non-photochemical quenching in res

87 h changes in the de-epoxidation state of the xanthophyll cycle and photoprotective non-photochemical

88 lly, it was modulated by the presence of the xanthophyll cycle carotenoid zeaxanthin.

89 regulated by the de-epoxidation state of the xanthophyll cycle carotenoids associated with the light-

90 In contrast, xanthophyll cycle carotenoids bound to LHCII trimers had

91 The molecular configuration of the xanthophyll cycle carotenoids, violaxanthin and zeaxanth

92 e solution pH, and the presence of exogenous xanthophyll cycle carotenoids.

93 In addition, the acclimation of the xanthophyll cycle content and composition of leaves to c

94 I, PRI) and both explanatory variables (NPQ, xanthophyll cycle de-epoxidation) were observed.

95 idase and zeaxanthin epoxidase establish the xanthophyll cycle enzymes as members of the lipocalin fa

96 first report of the absence of a functional xanthophyll cycle in a green macroalgae.

97 The absence of a functional xanthophyll cycle in C. tomentosum could contribute to t

98 Chlamydomonas, suggest that the role of the xanthophyll cycle in nonphotochemical quenching has been

99 oval of epoxide groups in carotenoids of the xanthophyll cycle in plants.

100 The xanthophyll cycle is an enzymatic, reversible process th

101 The xanthophyll cycle is implicated in protecting the photos

102 e photosensitivity of an ascorbate-deficient xanthophyll cycle mutant, vtc2npq1, which also lacks zea

103 dissipation in vivo, we isolated Arabidopsis xanthophyll cycle mutants by screening for altered nonph

104 tance, chlorophyll fluorescence emission and xanthophyll cycle pigment composition were recorded.

105 Mutation of PsbS did not affect xanthophyll cycle pigment conversion or pool size.

106 ncreasing stress tolerance responses such as xanthophyll cycle pigment de-epoxidation and antioxidant

107 qE key components LHCX, proton gradient, and xanthophyll cycle pigments (Dd+Dt) and to identify the i

108 articular, there is a stable increase in the xanthophyll cycle pigments (violaxanthin, antheraxanthin

109 lts strongly suggest that in addition to the xanthophyll cycle pigments (zeaxanthin and antheraxanthi

110 increased de-epoxidation of photoprotective xanthophyll cycle pigments and enhanced emission of vola

111 ncy, carotenoid-chlorophyll ratios, pools of xanthophyll cycle pigments, beta-carotene and stored mon

112 specific twofold increase in the size of the xanthophyll cycle pool.

113 ferent photosynthetic eukaryotes rely on the xanthophyll cycle to different extents for the dissipati

114 ical quenching (NPQ) and the occurrence of a xanthophyll cycle were investigated in the sea slugs Ely

115 examining the function and evolution of the xanthophyll cycle, and possibly enhancing light-stress t

116 The xanthophyll cycle, in which the carotenoid pigment viola

117 d DeltapH in excess light and depends on the xanthophyll cycle, in which violaxanthin and antheraxant

118 flow around photosystem I (CEF-PSI) and the xanthophyll cycle, relative to D4.

119 articular group of carotenoids, those of the xanthophyll cycle, that play a key role in the photoprot

120 oviding an appropriate MGDG platform for the xanthophyll cycle.

121 thin to antheraxanthin and zeaxanthin in the xanthophyll cycle.

122 the lutein epoxide cycle (LxL cycle) are two xanthophyll cycles found in vascular plants.

123 ss of function mutant and an increase in its xanthophyll de-epoxidation state correlated with the hig

124 After long-term xanthophyll deficiency, L or Z supplementation protected

125 In this work we compared the wild type and a xanthophyll-deficient mutant of Chlamydomonas reinhardti

126 To investigate the xanthophyll dependence of qE, we identified suppressor o

127 rvesting in plants is regulated by a pH- and xanthophyll-dependent nonphotochemical quenching process

128 roton gradient; (2) the deepoxidation of the xanthophyll diadinoxanthin (Dd) into diatoxanthin (Dt);

129 beta-Carotene endoperoxide, but not xanthophyll endoperoxide, rapidly accumulated during hig

130 and the acyl donor molecules involved in the xanthophyll esterification process.

131 Therefore, the presence of xanthophyll esters should be a phenotypic character to b

132 Xanthophyll esters were present in most cultivars, mainl

133 FW zeaxanthin dipalmitate and further minor xanthophyll esters, prevailing in a presumably liquid-cr

134 gated the effects of the lifelong absence of xanthophylls followed by L or Z supplementation, combine

135 systems formulated to evaluate the impact of xanthophyll form (esterified or free) and pH (acid or ne

136 The LC-MS (APCI+) analysis of the xanthophyll fraction in their native state (direct extra

137 Foveal protection was absent in xanthophyll-free animals but was evident after supplemen

138 Exposures of xanthophyll-free animals were repeated after supplementa

139 Monkeys fed xanthophyll-free diets had no L or Z in serum or tissues

140 Xanthophyll-free monkeys can accumulate retinal xanthoph

141 Xanthophyll-free monkeys had a dip in the RPE cell densi

142 eys (age range, 7-17 years; n = 18) were fed xanthophyll-free semipurified diets from birth.

143 Six monkeys remained xanthophyll-free until death.

144 r) to extract vitamin E, gamma-oryzanols and xanthophylls from rice bran.

145 lipophilic molecules like plastoquinone and xanthophylls has implications for diffusion-dependent el

146 arvesting complex of photosystem II (LHCIIb) xanthophylls have been identified for both the monomeric

147 To investigate the roles of xanthophylls in photoprotection, we isolated and charact

148 To dissect the role of xanthophylls in photoprotective energy dissipation in vi

149 two effects consistent with the location of xanthophylls in photosystem II antenna, but also a decre

150 0.10mug/g of vitamin E, gamma-oryzanols and xanthophylls in pigmented and non-pigmented ones, respec

151 The purpose of this study was to quantify xanthophylls in selected vegetables commonly consumed in

152 nd light-absorbance properties compared with xanthophylls in the human eye, use of the quail as a mod

153 reinhardtii revealed functions for specific xanthophylls in the nonradiative dissipation of excess a

154 defining the respective roles of individual xanthophylls in vivo by using a series of mutant lines t

155 Supplemental xanthophylls interact with n-3 fatty acid levels to prod

156 3 were capable of in vitro cleavage of 9-cis-xanthophylls into xanthoxin and C(25)-apocarotenoids, bu

157 A small effect of the different xanthophylls is observed on the extent of quenching of C

158 Lutein, a dihydroxy xanthophyll, is the most abundant carotenoid in plant ph

159 ma antioxidant capacity, circulating macular xanthophyll levels, and the optical density of the macul

160 ta-carotene and chlorophyll derivatives, the xanthophyll lutein has also decreased but not to the sam

161 kin bright yellow with the deposition of the xanthophyll lutein.

162 Macular pigment (MP) is composed of the xanthophylls lutein (L) and zeaxanthin (Z) and may help

163 The macular pigment xanthophylls lutein (L) and zeaxanthin (Z) and n-3 fatty

164 suggest that high dietary intake of macular xanthophylls lutein and zeaxanthin are associated with a

165 intakes of omega-3 fatty acids, and macular xanthophylls lutein and zeaxanthin have been associated

166 -fold more stable than were the free hydroxy xanthophylls lutein, zeaxanthin and beta-cryptoxanthin.

167 Xanthophylls (lutein and zeaxanthin) were less sensitive

168 the macular pigment, composed of two dietary xanthophylls, lutein and zeaxanthin, and another xanthop

169 hophylls, lutein and zeaxanthin, and another xanthophyll, meso-zeaxanthin.

170 Genetic dissection of xanthophyll metabolism in the green alga Chlamydomonas r

171 thod was used to identify and quantify a new xanthophyll metabolite that increases with age.

172 tors affect tissue concentrations of macular xanthophylls (MXs) within retinal cell types manifesting

173 Plant-based macular xanthophylls (MXs; lutein and zeaxanthin) and the lutein

174 fferent from that of free pigments, and both xanthophylls (notably, zeaxanthin) were found to be well

175 om that of carotenes, by characterizing a no xanthophylls (nox) mutant of Arabidopsis thaliana, which

176 re absorption spectral analysis of the major xanthophylls of higher plants in isolated antenna and in

177 Also, the effect of the different xanthophylls on the extents of static and dynamic quench

178 photoprotective processes, such as specific xanthophylls or feedback de-excitation.

179 hat are known to produce myxol or the acylic xanthophyll oscillaxanthin.

180 These xanthophyll (oxygen-containing) carotenoids are found in

181 Xanthophylls participate in light harvesting and are ess

182 The chlorophyll (Chl) and xanthophyll pigment compositions were measured using hig

183 udy resolved correlations between changes in xanthophyll pigments and photosynthetic properties in at

184 chieve higher NPQ(max) due to an increase in xanthophyll pigments coupled with enhanced electron flow

185 Xanthophyll pigments have critical roles in NPQ, and the

186 Xanthophyll pigments have critical structural and functi

187 hus, microgreen enrichment of carotenoid and xanthophyll pigments may be achieved using higher (16-33

188 orrelated with reductions in chlorophyll and xanthophyll pigments, quantum yield of photosystem II, a

189 e lowest excited singlet (S(1)) state of the xanthophyll pigments.

190 rbed light energy in a process that involves xanthophyll pigments.

191 synthesis--the oxidative cleavage of a 9-cis xanthophyll precursor to form the C15 intermediate, xant

192 nd often lethal when zeaxanthin was the only xanthophyll present.

193 entatively identified by HPLC-DAD-MS and are xanthophylls present under an esterified form.

194 Xanthophyll profiles in quail mimic those in primates.

195 af carotenoids allowed us to define specific xanthophyll species as precursors for the apocarotenoid

196 The specific functional role of each xanthophyll species has been recently described by genet

197 ates of the recombinant enzymes with various xanthophyll substrates, including the unique macula pigm

198 and antheraxanthin), alpha-carotene-derived xanthophylls such as lutein, which are structural compon

199 ared to be the best ones both for extracting xanthophylls such as lutein, zeaxanthin or beta-cryptoxa

200 by a concomitant decrease of the major leaf xanthophylls, suggesting an autoregulatory control of ch

201 significant levels of beta-carotene-derived xanthophylls, suggesting that additional beta-ring hydro

202 animals with adequate n-3 fatty acid levels, xanthophyll supplementation did not restore the foveal p

203 ively high and insensitive to the particular xanthophyll that is present.

204 PQ is intrinsically linked to the cycling of xanthophylls that affects the kinetics and extent of the

205 Lutein and zeaxanthin are dihydroxy xanthophylls that are produced from their corresponding

206 al amounts of specific beta-carotene-derived xanthophylls, that are essential for light-harvesting co

207 After supplementation with xanthophylls, the RPE profile of animals low in n-3 fatt

208 the efficiency of light harvesting from the xanthophylls to chlorophyll a is relatively high and ins

209 singlet energy transfer from the individual xanthophylls to chlorophyll have been investigated in re

210 a-carotene 9,10-dioxygenase (BCO2), converts xanthophylls to rosafluene and ionones.

211 noid dioxygenase (NCED), which cleaves 9-cis xanthophylls to xanthoxin, a precursor of ABA.

212 ed the simultaneous separation of carotenes, xanthophylls, ubiquinones, tocopherols and plastoquinone

213 he severe reduction of beta-carotene-derived xanthophylls (up to 90% in the lut1 b1 b2 triple mutant)

214 apsanthin, a non-native chromoplast-specific xanthophyll, using an RNA viral vector containing capsan

215 fluorescence spectroscopic properties of the xanthophylls, violaxanthin, zeaxanthin, and lutein, and

216 tween Prunus vs. Brassicaceae varieties, but xanthophyll was higher than carotene bioaccessibility (p

217 highly concentrated in the LDL fraction and xanthophyll was more evenly distributed in the LDL and H

218 By contrast, in neutral medium, free epoxy-xanthophylls were about 2-fold more stable than were the

219 Kinetic behaviours of xanthophylls were closely dependent on their chemical st

220 Xanthophylls were monitored by HPLC-DAD and kinetic para

221 pment, suggesting that carotenoids (at least xanthophylls) were still actively synthesized in mature

222 These xanthophylls when combined with protonation of antenna p

223 t was stabilized by supplementing cells with xanthophylls, which incorporated into thylakoid membrane

224 ith tissue-specific capacities to synthesize xanthophylls, which thus determine the modes of caroteno

225 esults suggest that the normal complement of xanthophylls, while not essential, is required for optim

226 for the production of refined flours rich in xanthophylls, with particular emphasis to the yellow-gra

227 nching capabilities and distinct contents of xanthophyll (Xan) cycle carotenoids.

228 -harvesting complex of PSII (LHC-II) and the xanthophyll zeaxanthin (Zea) into proteoliposomes, we ha

229 The deepoxidized xanthophylls zeaxanthin and antheraxanthin, together wit

230 1 lor1 double mutant, which lacks protective xanthophylls (zeaxanthin and lutein) in the chloroplast,

231 antly dicylic beta-carotene and two dicyclic xanthophylls, zeaxanthin and synechoxanthin.