THEELECTRONICSTRUCTURE OFPHOTOSYSTEMII CHARGESEPARATIONDYNAMICS ElisabetRomero INTRO2ȋǦǦͷͲͷͲͻȌ Ǥ ǡ ǡ ǤǤǡǦǡòȀǡ ǤǤ ǡǡ ǤǤǡǡǡ ǤǤǡǡ ǤǤ Ú ǡ ISBNǣͻͺǦͻͲǦͺͷͲǦʹͻǦͷ TheElectronicStructureofPhotosystemII ChargeSeparationDynamics ǡ ǤǤǤǤǡ ʹͷʹͲͳͳͳ͵ǤͶͷ ǡ ͳͳͲͷ ElisabetRomeroMesa ǡ ǣ ǤǤǤ ǣ ǤǤǤ Amispadres, porsuapoyoycomprensión AlmeugermàDanieli alaMabel, pelmésbonic, elBielilaIara CONTENTS 1. Introduction9 2. TwoPathways 23 3. ǣ Modeling 49 4. Carotenoid ǣ ǫ69 5. ElectronicStructureǣ Ȃ 79 6. PigmentǦProteinInteractions ȋͺͲȌȋͳȌ Ǧ ȋȌ 111 7. Ǧ Ǧ Ͷǣ MixingExciton ChargeǦTransfer141 SUMMARY151 SAMENVATTING155 ListofPublications159 NAWOORD161 CHAPTER1 Introduction ǯ Ǥ Ǥ ǡ Ǥ ȋ ǡ ȌǤ ǣ Ǣ Ǥ ǡ ǣ ǡɓ ʹΪʹĺͳʹΪʹ ͳʹ Ǥ ǡ ǡ Ǥ ǡ ȋȌ ȋ Ȍ Ǧ Ǥ ͳ Ǧ ȋ Ȍ Ǣ ȋǦȌ Ǥ Ǥ Ǧ ǡ Ǥ Ǥ Ǧ ǡ ǡ Ǥ ǡǡ ȋ ȋ1Ǧ4ȌȌǤ ȋȌǡ Ǧ ǡ Ǥ ReactionCenters:BacterialRCvs.PSIIRC ȋ Ȍ ȋ ȌǤ Ǥ ǡ ȋǡͳαͳͲǦͳͷȌ Ǥ ȋ Ȍǡ ǡ Ǥ ǡ ǡ ǡ ȋ ȌǤ ͳͲͲǤ 10 ǡ ǡ Ǧ ȋ5Ǧ8ȌǤ ͳǤ ǣ a ȋȌ aȋȌ aȋȌ a ȋȌǤ Y ǡ YͲͲǦ ͻͷͲYͶͷǦʹͲ Ǥ ǡ ȋͳȌǤ Ǥ Figure1Ǥ ǤȋLeftȌ Thermosynechococcus elongatus ȋ8Ȍǡ ȋrightȌ RhodobactersphaeroidesǦʹȋ9ȌǡȋbottomȌ Ǥ 11 ͳ ǡ ǡ ǣ Ǥ ǡǡ Ǥ ǡ ǡspecialpairǡ Ǥ ǣ ǡǢǡǢ ǡǤǤǡ ȋ ͳ ȌǤ ǡ ǡǡ specialpairǤ specialpair ǡ ͵ȋͳαͳͲǦͳʹȌ ΪǤǡ ͳΪȋ ǡ Ǧ ȌǤ ǡ γ ͺͲͲ ǡ ǡ Ϊ Ϊǡ specialpairȋ10Ǧ12ȌǤ invivoǡ ȋ ȌǤ ǡ ǡ ǡspecialpairǤǡ γ ͳͲǦͳͳ % ǡ ǡ ȋ Ȍ Ǥ ̶ ̶ ȋ13ȌǤ Ǥ ǡ ȋͳȌǤ ǡ ǡ Ǥ Ǧ Ǥ 12 ThephotosystemIIreactioncenter:acloserlook ͳǡ ʹǡ ͷͷͻ Ǥ ǡ ͳ ʹǡ Ǧ Ǥ ȋͳǡͳǡͳǡʹǡʹǡʹǡ Ȍ ǡ ȋȌǡ γʹͷ% ǡ ȾǦ ȋͳȌȋ6Ǧ8ȌǤ ǡǦ ǡ ǡ Ǥǡ ̶̶ Ǧ Ǥ ǡ in vivo ǡ ȋǦ Ȍ ȋȌ Ǥ Ǥ ǡ ǡ Ǥ ǡ ȋ Ȍ Ǥ ͳͻͻͻȋ11,12Ȍǡǡinvivo ȋ special pair Ȍ Ǥ ǡ Ǥǡ ǡ ȋ14Ǧ16ȌǤ 13 ͳ ThisThesis Ǥ ȋ17Ȍ ȋ Ȍ ȋ16ȌǤ Ǥ ǡ ǡ ͵ǡ ʹ ÚǤ Ǥ Ͷ ǣ ȾǦ Z Ǥ ȾǦ Z Z Ǥ ͷ Ǧ Ǥ Ǧ ȋȌ Ǧ Ǥ Ǧ ǡ ͺͲǡ ǡ ͳǡ Ǧ ȋȌ Ǥ Ǧ ǣ Ȍ ͺͲ ȌͳǦ Ǥ Ǧ ǡǡ Ǥ 14 Ǧ Ͷǡ ǡ Ǥ Ǥ SpectroscopicTechniques Transientabsorptionspectroscopy ǡ ǡ ǡ ȋȌ ȋͳα ͳͲǦͻ ȌǤ ǡ Ǥ ǡ Ǧǡ Ǥ ǡ ǡ Ǥ ǡ ȋȗȌ ȋͳȌ ǡǡ ȋʹȌǡǤǤǡȗĺ ͳ ĺ ʹǤ ȋȌ ȋɒȌ Ǥ ǡ ǡ Ǥ Ǥ ȋAbsȌ ȋȌ ǣ ȋɉȌ ǡ ȋɉȌ ɉ Ǥ 15 ͳ ǡ Ǧ ǡ ɒǡ ǡȟAbsȋɉǡɒȌǡǣ ȋɉǡɒȌpumponȋɉǡɒȌpumpoff ǡ ǡǤ ǡȟAbs ǣ i) GroundǦState Bleach (GSB)Ǥ ǡǡ Ǥ ǡǦ ȋpump onȌ Ǧ ȋpumpoff) ȟAbs Ǥ ii) Stimulated Emission (SE)Ǥ Ǧ Ǥ ǡ ǡ Ǥ ȟAbs Ǥ iii) ExcitedǦState Absorption (ESA)Ǥ ǡ Ǥ ǡ ȟAbs Ǥ iv)ProductAbsorption(PA)Ǥ Ǧ ǡ ǡ Ǧ Ǥ ȟAbs Ǥ ȋ ǡ Ȍ ȋ18ȌǤ ʹͶ Ǥ 16 Starkspectroscopy Ǥ ȋ ȌǤ Ǥ Ǥ ǡ ǡ Field on Field offǤ ǡ ȋ Ȍ ǡǣ ǡ ȋ19, 20Ȍ Ǥ ǡ Ǥ ǣ ǡ ǡȟμǡ ǡ ȟȽǡ Ǥ ȟμ Ǥ ǡ ȟμ ȋȌ ǡ ǤǤǡ Ǥ Ǧ Ǥ ȟȽ ȋ19, 20Ȍ Ǥ 17 ͳ ȋ Ȍǡ Ǥ ǡ Ǧǡ ǡ ǡ ȋ21ȌǤ ȟȽ ȟμ ǡ ǡ ȋ ȌǤ ȋ ǡ Ȍ ȋ20Ȍ ȋ19ȌǤ ͷǤͷ Ǥ Ǧ ͶǤ LightǦinduced spectroscopy Fourier transform infrared (FTIR) difference ȋȌ ȋ22ȌǤ ǡ ȋ ͲǤͷȂͲǤͲͷ Ȍ Ǥ Ǥ ȋ Ȍǡ ǡ Ǥ ǡ Ǧ Ǥ ǡ Ǧ Ǥ Ǧ ǡ ǡ Ǥ classical 18 ǡreactionǦinduced Ǥtrigger ǡ Ǥ ǡ Ǥ ǡǦ ȋȌ ȋ ǦǦ Ȍ Ǧ Ǥ ǡ DarkǦLightǦDark ȋ DarkǦ LightǦRelaxationȌǤ Dark ǤLight Ǥ DarkRelaxation Ǥ Light Dark ǣ Ǣ Dark Relaxation Ǥ DarkǦLightǦRelaxation Ǥ ǣ Light Dark ȋLǦȌ Relaxation Dark ȋRǦDȌǤ ȋLǦȌȋRǦDȌ Relaxation Ǥ Ǧ Ǥ Ǧ ȋ Ȍ ȋSynechocystisǤͺͲ͵ȌǤ 19 ͳ REFERENCES ͳǤ ǡ Ǥ Ǥ ȋʹͲͲͺȌ ǡ Molecular mechanisms of photosynthesis ȋǡ Ǥ Ǥǡ ǤȌǡͳǦͳͲǡ ǤǡǤ ʹǤ ²ǡ Ǥ ȋʹͲͲͳȌ ǣ ǡ Phototsynthesis: photobiochemistry and photobiophysics ȋ ǡ ǤȌǡ ͳǦͶǡ ǡ Ǥ ͵Ǥ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ Úǡ Ǥ ȋͳͻͻͶȌ ǡ Biochim. 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Chem. 48ǡ ʹͳ͵Ǧ ʹͶʹǤ ʹͳǤ ǡ Ǥ ȋͳͻͶȌ Excited states ȋǡ Ǥǡ ǤȌǡ ͳʹͻǦʹʹͻǡ ǡǤ ʹʹǤ ¡ǡǤȋͳͻͻȌǦ ǡ BiophysicaltechniquesinphotosynthesisȋǡǤǤǤǤǤǡǤȌǡͳ͵Ǧ ͳͲǡ Ǥ 21 CHAPTER2 TwoDifferent ChargeSeparationPathwaysin PhotosystemII ǡǤǤǡǤǡ Ǥ Ǥ ǡ Ǥ ǡȋͳͳȌȗȋͳʹͳȌȗǡ Ǥ ǡ Ǥ ǡ ǡ Ǧ Ǥ ǡ Ǧ Ǥ ǣ ǡǤǤǡǤǡǤ ǤȋʹͲͳͲȌBiochemistry(AcceleratedPublications)ǡ49ǡͶ͵ͲͲǦͶ͵Ͳ ʹ INTRODUCTION Ǥ ǡ Ǧ ǦǤ Ǧ Ǥ ȋ ǡ ǡ Ȍ ȋ Ȍ ȏȋȌȐȋ Ȍ ȏȋȌȐ Ǥ ȋ1Ǧ4ȌǤ ȋȌ ȋ5ȌǤ ǡǡ ȏ ǡ γ ͺ % ǡ ȋ6ȌȐǡ γ ͺͷ Rhodobacter sphaeroidesǡ ͳ ȋȌǤǡ ȋȌ͵ǡ ȋȌ ͳ ǡ Ǧ ǡ ΪǤ ǡ ǡ γͺͲͲȋȌ ǡ Ϊ Ϊ ȋ7Ǧ9ȌǤ In vivoǡ ǡ Ǥ ȋȌǡ ǡ γ ͳͲǦͳͳ % ȋ10Ǧ13Ȍ ȋ14, 15Ȍ ǡ ȋ Ȍ Ǥ ǡ Ǧ ǡ ȋͳǡͳǡͳǡʹǡʹǡʹǡ Ȍǡ ȋȌǡ γ ʹͷ % ǡ ȾǦ ȋ10Ǧ13ȌǤ ǣ ȋǦ Ȍ 24 ǡ ǡ ǤǦ ǡYǡ ǡ ȋȌǡ Ǥ ȋ15, 16ȌǤ ȋ17, 18Ȍ ȗĺ ͳΪͳĺͳΪͳĺȋͳΪͳȌǤͳͺǡ ǡ ȗǡ Ǥ ǡ ȋ19ȌǤ ǡ Ǧ ȋȌ Ǥ ǢǤǤǡ Ǥ ȋ14,20Ȍǡ ǡ ȋ Ȍ ȋ19ȌǤ ǡ ǡ ǡ Ǥ ǣ ͳǣ ͳǣ ȋͳͳȌȗĺͳΪͳĺͳΪͳ ȋͳʹͳȌȗĺʹΪͳĺͳΪͳĺͳΪͳ ȋ ȌǤ ǡ Ǥ ȋͶʹͷ͵ͲǡY X ͷͶͶ γ Ͷͷͷ Ȍǡ ȋ ͳͲ ͵ ǡ Ȍǡ 25 ʹ ȋ Ȍǡ ȋ ͳ ͳȌǤ ǡ ǡ ȋ19Ȍǡ ǤǡǦ ǡ Ǥ MATERIALSANDMETHODS Sample PreparationǤ ȋͳǦʹǦ ͷͷͻȌ ȋ21ȌǤ ͲΨ ȋȀȌǡʹͲȋǤͷȌǡʹͲͲ ǡ ͲǤͲΨȾǦǤ γͳǦͳͺǤ Laser SystemǤ Ǧ ȋ ǡ ͺͲͲ ǡ ͺͲ Ȍ ʹǤͷ ǣ Ǧ ȋ ǦʹͲǡ ͷʹ ȌǤ ǣǦ ȋ ǦȌ ȋȌ ǦͷͲ ǡ ͺͲͲ ͳͷ ȋȌǤ ǡ ǡ ͺͲͲ ʹ Ǥ γ ͳʹͲ Ǥ ȋǡ Ȍ ǦǤ γ ͳͲͲ ͳͲ Ǥ ǡ ͳǤͷ Ǥ ȋͷͶǤιȌǤ ͳͲ ͷɊǡ Ǥǡ ͳͷ ȋȌ ͵ͲͲ Ȁ ͷͲͲ Ǧ ʹͷǦ Ǥ γͳͶͲγͳ ǡ Ǥ 26 Experimental DesignǤ Ͷʹͷ ͵Ͳ Ǥ Ǧ ȋͳǦʹȌǡ ͵͵͵ȋǤǤǡȌǤȋͷȌ ȋɉ Ȍ ǣ Ͳǡ ͷǡ Ͳǡ ͷǡ ͺͲǡ ͺͷ Ǥ ǡ ȋȌǣʹȋͺȌǡͷ ȋͳʹ Ȍǡ ͺʹ ȋͺ ȌǤ ȋͷǤͷǦ͵ͲȀ ɉ ȌǤ Ǥ ǡ Ǥ ʹͷǦͳͲ͵ ȋʹʹͷǦͳͲͳͲͲȌǡͳͲͲͲ Ǥ Ǥ ͷͲΨͳͲͲͲ ͷΨǤ Ǥ Ǧ Ǥ ͷǡǤ Data AnalysisǤ Ǥ Ǥ Ǥ RESULTS Ǧ ȋ Ȍ ǣ Ͳǡ ͷǡ Ͳǡ ͷǡ ͺͲǡ ͺͷ ȋͷȌȋͳȌǢ ʹͺʹ ȋͺȌǢ ͷȋͳʹ Ȍ ȋ ͳ ȌǤ ȋ22Ȍ Ǥ ȋ22ȌǤ Y ǣ Z Ͳ ȋ23Ǧ25Ȍǡ ʹ ͳ ͺͲ ȋ26Ȍǡ ͳ ʹ ͺͲ ȋ27Ǧ31Ȍǡͳ ʹǤͷȋ27ȌǤ 27 ʹ X ͷͶͶǤǦ ȟAͷͷ Ͳ ȋ32, 33Ȍ Ǥ X ͷͶͶ ǡ Ͷͷͷ ǡǤǤǡ Ǥ 685 680 675 1,0 670 Excitation (nm) 665 1,2 660 Absorption and excitation / OD 0,8 0,6 0,4 0,2 0,0 650 660 670 680 Wavelength / nm 690 700 Figure 1Ǥ ȋ Ȍ (thick lineȌ ȋthinlinesȌǤ GlobalAnalysis ǡ Ǥ Ǧ ȋȌʹͳ Ǥǡ ȋȗȌĺͳĺʹ ǡ Ǥ ȋ ͳȌǡ ͷͲͲǡ͵ǡʹͲǡ͵ͲͲǡͲͲǡʹͲ Ǥ Ǧ ȋȌ Ǥ ǡ ʹͲ ͵ ʹͲȋ22ȌǤ ʹǤ Y ǡ Z ǡ Ǥ 28 Qy region 500 fs 3 ps 20 ps 300 ps 600 ps 20 ns excitation 'Absorption / mOD 'Absorption / mOD 0 -10 -20 -30 -40 -50 660 670 680 690 700 Wavelength / nm 660 670 680 690 700 660 670 680 690 700 660 670 680 690 700 Wavelength / nm 660 670 680 690 700 660 670 680 690 700 0 -10 -20 -30 -40 -50 Phe Qx bleach region 500 fs 3 ps 20 ps 300 ps 600 ps 20 ns 'Abs / mOD 0,0 -0,5 -1,0 535 545 555 Wavelength / nm Phe anion region 535 545 500 fs 555 535 3 ps 545 555 20 ps 535 545 300 ps 535 555 545 600 ps 555 535 545 555 20 ns 'Abs / mOD 2 1 0 440 460 480 Wavelength / nm 440 460 480 440 460 480 440 460 480 440 460 480 440 460 480 Figure 2Ǥ Ǧ ȋȌ Ǥ YȋfromtoptobottomandfromlefttorightȌ ͲǡͷǡͲǡͷǡͺͲǡͺͷ ǤX ȋfrom left to rightȌ ͲǦͺͷ ǤȋfromlefttorightȌ ͲǦͺͷ Ǥ ǡ Ǥ Ǧ ȋʹͲȌǤ ͷͲͲ ǡ Z ʹͲ ȋ23,34,35Ȍǡ ȋȌǤ ǡ Y ǣ ȋͲǦͲȌ ʹͲ ͲͺͲ ͺͲ ͷͲͲ ͵ͲͲ Ǣ ȋͺͲǦͺͷȌ ͺͲ 29 ʹ ͷͲͲ ʹͲ ʹ ͵ ͲͲ ȋͷ ȌǤǡ͵ͲͲͲͲͲͲʹͲǡ ǡ Ǥ ͲͲ ǡ ͲͲ ʹͲ ǡͳΪͳǤ (i) Red Excitation (680Ǧ685 nm)Ǥ ͷͲͲ ͺͲǤͷ ͺͳǤͷ ͺͲ ͺͷ ǡ ȋ ʹȌǡ ͳǡ ʹǡ ͳǡ Ȁ ʹ ȋ26Ǧ29, 31Ȍ ȋȌ Ǥ YǦ ǡ Ǥ ͷͲͲǡͺͲ ʹ Ǥ ͵ ǡ ͺͲ ʹ Ǥ͵ʹͲǡʹͲ ͵ͲͲǡ͵ͲͲͲͲǤ Ȁ ͳ ͳǣͳȗȀͳĺͳΪͳȋͳȌ ĺ ͳΪͳ ȋʹȌǤ ͳ ĺ ʹ X͵ ȋ18ȌǤǡ X ͷͶͶȋʹʹȌǤ ǣ ͷͲͲ ȋ ȗȌ ͵ǡ ʹͲǡ ͵ͲͲ ȋ ͳȌǤͳ Ͷͷͷ ȋʹͲ͵ͲͲȌ ͳǤ ͳ ȋ Ȍ Zȋ18,32,36ȌǤȋȌ Zȗ ͺͲǦͺͷ ȋ Ͷ Ȍǡ Z Ǥ ͳ ͳ ȋͳǡͳͺȌ Ǥ 30 (ii) Blue Excitation (660Ǧ670 nm)Ǥ ͷͲͲ ȋʹȌ Ǥǡ Ͳͻ Ǥ Ͳ Z ȋ23Ȍ ͳȋ27Ȍ Ǥͻ ȋȌ ͳǡ ʹǡ ͳǡ Ȁ ʹ ȋ26Ǧ29, 31ȌǤ ͷͲͲ ͵ Ͳ ͺͲ Ǥ Ͳ ͺͲǤ͵ȋʹͲȌǡͲ ͺͲ Ǥ ʹͲ ǡ Ͳ ͺͲ ǡ Z ȋ23, 34, 35ȌǤ γʹ ͳȋ27ȌǤ ͵ͲͲǡͲͲ ʹ ͺͲ Ǥ ͳ ǣ ͳΪͳ ȋͳȌ ĺ ͳΪͳ ȋʹȌǤ ǡ ǡ͵ͲͲǡX ͳͷǦʹͲΨ ǤȋʹͲ͵ͲͲȌ ͳ ͳ Ͷͷͷ ȋʹȌǤ (iii) ChlsZ* Population and Energy Transfer to the RC Core PigmentsǤ Zȗ Ǥ X ȋͲͲ ȌǤ ǡ͵ͲͲǡX Ǥǡ ǡ ǣ γ ʹͻΨ ͷͲͲ γ ͷʹΨ Ǥ Ǥ X ʹͲǣγ͵ͶΨγͳ͵Ψ ȋ ʹ Ȍǡ ʹͲ ȋ X ȌǤ Z Ͳ ʹͲ Z ȋ23, 34, 35ȌǤ 31 ʹ ǡ ȋȌ Z ͺͲǦͺͷ ȋȌ Z ʹͲǡ ȋ18,32,36ȌȋͶ ȌǤ TargetAnalysis ͳǤ ǡ ǤǡǤ ǡ ͳ ͳ ǡ ȋͳȌ ȋʹȌ ǡ ǡ ȗ Ͳȗǡ ȋ͵ȌǤ ǡ Ǥ ȏͲǡ ͷǡ Ͳǡ ͷȋͷȌǢʹȋͺȌǢͷȋͳʹȌȐ Ǥ ͺͲǡ ͺʹǡ ͺͷ ʹ Ǧ ȋʹȌǤ Ǧ ȋȌ Ǥ ȋ ȌǤ ǡ ǡ ͵Ǥ ȋ͵ȌǤ 32 ChlD1 path 25 ps Chl D1PheD1* Chl z*667 'A bs/ m O D 25 ps PD1PD2 Chl D1* Chl Z 0 Chlz667* Chlz670* 2 1 0 -1 -2 450 500 550 600 'Absorption / mOD PD1+ PheD1 500 ps 37 ps PD1 +Chl D1 1 ps PD1+ PheD1 relaxed PD1 path ChlD1 path 2 -4 58 ps PD1 path Chl z*670 -2 Chl D1+ PheD1 3 ps ChlD1PheD1* ChlD1 + PheD1 - 450 500 550 600 PD1PD2ChlD1* + PD1 ChlD1 - 2 1 0 -1 -2 450 500 550 600 0 0 0 0 -20 -20 -20 -60 Chlz670* 660 670 680 690 700 Wavelength / nm -40 -0,5 -40 ChlD1PheD1* -1,0 -60 - + - PD1 PheD1 relaxed 0,0 0,0 Chlz667* + PD1 PheD1 450 500 550 600 -20 -40 17 ns Final state 2 1 0 -1 -2 + 530 540 550 660 670 680 690 700 Wavelength / nm + - ChlD1 PheD1 PD1PD2ChlD1* -60 -40 660 670 680 690 700 Wavelength / nm -60 + - + - PD1 PheD1 -1,0 - PD1 ChlD1 -0,5 530 540 550 PD1 PheD1 rel 660 670 680 690 700 Wavelength / nm Figure 3Ǥ ȋtopȌǤ ȋbottomȌǤ X Ǥ ȋ ͶʹͷǦͷͲ ȌǤ (i)ChlsZǤ ǡ Ͳǡͷǡ ͺͷ Ǥ ȗ ȋͳȀʹͷ ȌǦͳǡ ʹͲ ȗȋ23,34, 35ȌǤ (ii) ChlD1 PathǤ Y ǡ ȗ ȋͳͳȌȗ ͻ Ǥ ͵ ͳ ȋͳΪͳȌͳǦǤ X ͷͶͶǡͳ ͶͷͷǤ ǡ Y ͻ ͳǡ ȋͳͳȌȗĺͳΪͳǤǡ ǡ ͻͲ Ǧ ͲͲǦ͵ͲǤ (iii)PD1PathǤYǡȗȋͳʹͳȌȗ Ͳǡ ǡ ͺͲ ͲǤ͵ǡ ͲǤǡ ͳǡ Ǥ ȗ ͳ ȋͳΪͳȌ Ǥ ǡ Ͳǡ ǡ ͺͲ ǡͳ Ȁ ʹǡͳǡ ǡ ȋͳʹͳȌȗĺͳΪͳ Ǥ 33 ʹ ͳ ͺʹ ȋ ͳȌ Ͳ ͳǤ ǡ Ǥ (iv) Secondary Electron TransferǤ ǡ ͳͳ ͲǤͲʹǦͳ ȋͳȌͳͳΪ ͲǤͲͳǦͳȋͳȌǤ ʹǡͳΪͳǡǦͺͲ ȋͳȌǡʹȋͳȌǡX ǡ Ǥ ǡ ǦͶͷʹͷǤ (v) “Relaxation” ProcessǤ ǡ ǡ ͷͲͲ ͳΪͳǣ Yǡ ʹ ͺͲ ǡ ͳʹͲΨǤ ǡ Ǥ ͳ ʹͲΨǤ ʹͲΨ ͷΨX ͳǤ SimplifiedTargetAnalysis Ǥ ǡ ȋȗ ͳȌǤ Ǥ ȋZȗǡȗǡͷȗǡͷͺͷȗȌ ȏ ͳ ǦǡͳΪͳȋʹȌȐȋͶȌǤ 34 385 fs RC * 1.8 ps Radical Pairs 17 ps Chl z * Trap 65 * 65 ps 'A bs/ m O D Trap 585* ChlZ RC* -4 Chlz -1 'Absorption / mOD -1 0 Trap65* Trap585* -1 450 500 550 600 450 500 550 600 450 500 550 600 1 0 RC * Radical Pairs 0 0 0 0 -10 -10 -10 -20 -30 -30 Chlz -40 -40 660 670 680 690 700 Wavelength / nm -20 RC * Radical Pairs 660 670 680 690 700 Wavelength / nm -30 -40 + - PD1 PheD1 450 500 550 600 -10 -20 13 ns Final state 1 0 -2 585 ps Trap states Radical Pairs 1 0 PD1+ PheD1 -20 Trap65* Trap585* 660 670 680 690 700 Wavelength / nm -30 + -40 PD1 PheD1 660 670 680 690 700 Wavelength / nm - Figure4Ǥ ȋtopȌǤ Ͳ ȋbottomȌǤ ȋ ͶʹͷǦͷͲȌǤ ͳǡZ Ǥͷȗ ͷ ʹǤ Ͷǡ͵ͻǡ͵ȋͷǡͺͲǡͺͷ ǡ Ȍ ȋ ʹ ȌǤ ǡʹ ͷͲͲ ǡ ͷͺͷǤ Zȗǡ ȗǡ ͳ ȋ͵ȌǤ ǡ Y Ǥ ͷȗ ͺͳǤͷͻͲ Ǥͷͺͷȗͺͳ ǡ ͻͲǡX ǡ Ǥ ȋ Ͷ ȌǤ ȋͲǡ ʹǡ ͷǡ Ͳ Ȍǡ Zȗȋ͵͵ΨȌǡȗȋͶ͵ΨȌǡͷȗȋͳͶΨȌǡ ͷͺͷȗ ȋͳͲΨȌ Ǥ Z ǡ ͷͻΨ Ǧ ȋͳΪͳȌ ȗǡ ͳͷΨ ͷȗǡ ʹΨ ͷͺͷȗǤ ȋͺͲǡ ͺʹǡ ͺͷȌǡ ǣͲΨȗǡ ʹͲΨͷȗǡʹͲΨͷͺͷȗǤ 35 ʹ Z Ǥ DISCUSSION TrapStates Ͷ ȏ ȋ37Ȍ ȋ38ȌȐǤ ǡ ǡ ǡ ͷ ͷͺͷ ǡ ǡ ͷ ͷͺͷǡ Ǥ Ǧ ȋȌ ȋ20ȌǢ ǡ ȋͶȌǡ ͷͺͷȋͳͳȌȗͷ ȋͳʹͳȌȗǤ ȋ38,39Ȍ ǡ ǡ Ǥ ȋͳͳȌȗȋͳʹͳȌȗ Ǧ Ǥ Ǥǡ Ǧ ǡ ȋ ͵ȌǤ ǡ ǡ γͷͲ γͷͲͲ Ǧ Ǥ ȋͶȌǤ ǡ ȗĺͳĺʹ Ǥ 36 MultiplePathwaysofChargeSeparation ͳ ǡ X ǡ ȋ19,40ȌȋͳʹͳȌȗĺʹΪͳĺͳΪͳ ĺ ͳΪͳ Ǥ ĺ ǡǤ ǡ ȋ14,37Ȍǡ ǡ Ǥ ǡ ȋ7Ǧ9ȌǤǣ ǫ Ǥ ǡ ǡ Ǧ ȋ41Ǧ43Ȍ Ǥ ǡ Ǥ ǣ ȋ44Ȍǡ ȋ45Ȍǡ ȋ46ȌǤ ǡ Ǥ ǡ ǡ Ǥ ǡ Ǥ ͷ Ǥ 37 ʹ Figure 5Ǥ Y ȋ ȋ13ȌȌǤ ǡ ǡ ͳ ǣ ȋͳͳȌȗ ĺ ͳΪͳ ĺ ͳΪͳ ͳ ǣ ȋͳʹͳȌȗ ĺ ͳΪͳ ĺ ͳΪͳǤ ǡ ͳ ǡͳ ǡͳ Ǥ Ǧ Ǥ Ǥ ACKNOWLEDGMENT Ǥ ʹ ȋǦǦͷͲͷͲͻȌ ȋǤǤȌ ȋȌ ȋǤǤǤȌǤ 38 APPENDIX 1,0 682 Excitation (nm) 675 1,2 662 Absorption and excitation / OD 0,8 0,6 0,4 0,2 0,0 650 660 670 680 Wavelength / nm 690 700 FigureA1Ǥ ȋȌ ȋthick lineȌ ȋthinlinesȌǤ 39 ʹ -3 'Absorption / x10 a.u. 660 nm excitation 2 10 0,5 0 1 0,0 0 -1 -2 -10 1.6 21 308 13 -0,5 440 460 480 500 Wavelength / nm 520 520 ps ps ps ns 530 540 550 560 Wavelength / nm 570 -20 -30 640 660 680 700 Wavelength / nm 720 660 680 700 Wavelength / nm 720 660 680 700 Wavelength / nm 720 660 680 700 Wavelength / nm 720 660 680 700 Wavelength / nm 720 660 680 700 Wavelength / nm 720 -3 'Absorption / x10 a.u. 665 nm excitation 2 0,5 10 1 0 0,0 -10 0 -2 17 46 535 18 -0,5 -1 440 460 480 500 Wavelength / nm 520 520 530 540 550 560 Wavelength / nm ps ps ps ns 570 670 nm excitation -3 'Absorption / x10 a.u. 2 -30 640 10 0,5 0 1 -10 0,0 0 -1 -2 -20 2 18 245 12 -0,5 440 460 480 500 Wavelength / nm 520 520 530 540 550 560 Wavelength / nm ps ps ps ns 570 -20 -30 640 10 0,5 2 0 -3 'Absorption / x10 a.u. 675 nm excitation 1 -10 0,0 0 -1 -2 1.8 17 295 13 -0,5 440 460 480 500 Wavelength / nm 520 520 530 540 550 560 Wavelength / nm ps ps ps ns 570 -20 -30 640 -3 'Absorption / x10 a.u. 680 nm excitation 2 10 0,5 0 1 0,0 0 -1 -2 -10 3 39 606 41 -0,5 440 460 480 500 Wavelength / nm 520 520 530 540 550 560 Wavelength / nm ps ps ps ns 570 -20 -30 640 -3 'Absorption / x10 a.u. 685 nm excitation 2 10 0,5 0 1 0,0 -10 0 -1 -2 4 36 540 13 -0,5 440 460 480 500 Wavelength / nm 520 520 530 540 550 560 Wavelength / nm ps ps ps ns 570 -20 -30 640 Figure A2. ȋȌ Ǥ ȋFrom toptobottomȌͲǡͷǡͲǡͷǡͺͲͺͷ ȋfromlefttorightȌǡXYǤ 40 ͶͶͲȂͶͲ Ǧ Ǥ Ǥ ͷ͵ͷ Ȃ ͷͷͷ X Ǥ ǡ Ǥ ǤY Ǥ Ͷ Ǥ Ͳ Ȃ Ͳ γʹͲ ǡ Ǥ γͶͲʹͷͲȂͲͲ ǡ Y γͶͲ ͺͲȂͺͷ Ǥ Table A1. Ǥ Ǥ ɉ ȋȌ 660nm(5) 665nm(5) 670nm(5) 675nm(5) 680nm(5) 685nm(5) 662nm(8) 675nm(12) 682nm(8) ɒ1/fs ͳͶͷ ͺͲ ͳͻͻ ͳ͵ͺ ʹͲͷ ͻͲ͵ ͳͲͷ ʹ ͳͲͷ ɒ2/ps ͳǤ Ȇ ʹ ͳǤͺ ͵ Ͷ ͳǤ ͳǤ͵ ͳǤͺ ɒ3/ps ʹͳ ͳ ͳͺ ͳ Ȇ Ȇ ʹͲ ʹͳ Ȇ ɒ4/ps Ȇ Ͷ Ȇ Ȇ ͵ͻ ͵ Ȇ Ȇ ͵ͳ ɒ5/ps ͵Ͳͺ ͷ͵ͷ ʹͶͷ ʹͻͷ Ͳ ͷͶͲ ͵͵ͳ ʹͷ ͷ ɒ6/ns ͳ͵ ͳͺ ͳʹ ͳ͵ Ͷͳ ͳ͵ ͳʹ ͳʹ ͳͶ ͳͲ Ψ ɒʹ Ǧ ɒͷ ʹͲ Ψ ɒͳǤ ɒ ͵ǡ longlivedǤ 41 ʹ Table A2. X Ǥ 660nm 665nm 670nm 675nm 680nm 685nm 500fs ʹͻ ʹͻ ʹͻ Ͷ ͷͶ ͷͲ 3ps ͵Ͷ ͵ Ͷʹ Ͷͻ Ͳ ͷ͵ 20ps Ͷ Ͷͳ Ͷͻ ͷͷ ͵ ͳ 300ps ͺͲ ͺͲ ͺ͵ ͺͷ ͺ ͺʹ 600ps ͳͲͲ ͳͲͲ ͳͲͲ ͳͲͲ ͳͲͲ ͳͲͲ 20ns ͺͺ ͻͷ ͻ ͻͳ ͻͷ ͺͺ ȟ(300Ǧ20ps) ͵͵ ͵ͻ ͵Ͷ ͵Ͳ ͳͶ ͳͳ ȗȀ ȋȌ X ͷͶͶ ȋȟͷͷαͲȌ ͲͲ Ǥ ͳͲΨǤ TableA3. blue Ǥ ɉ ȋȌ 660nm (5) 665nm (5) 670nm (5) 675nm (5) 662nm (8) 675nm (12) ȗ Ͳȗ ͳͳȗ ͳʹͳȗ ͳͳȗ ͳʹͳȗ ʹͷ Ͳ Ͷͺ ʹ Ͷ ͵ ʹ ͷ ͷͳ ͳ ͷ ʹͷ ͵ ʹ ͷͺ ͳʹ ͺ͵ ͳ Ͳ ͺ ͺͷ ͻʹ ͺ ͵ͳ Ͳ ͷͷ ͳͶ ͺͲ ʹͲ Ͳ ͳʹ Ͳ ͳͺ ͺͲ ʹͲ ͵ ǤͳͲΨǤ 42 TableA4Ǥ Ǥ ȗ ȗ ͷ ͷͺͷ Blue ͵͵ Ͷ͵ ͳͶ ͳͲ ͶͺΨ͵͵αͳ ͶΨ͵͵αͶ ͶͺΨ͵͵αͳ ͷͻ ͳͷ ʹ Red Ͳ ʹͲ ʹͲ Ͷ ǤͳͲΨǤ 43 ʹ REFERENCES ͳǤ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥ ȋͳͻͺͷȌ Ǧ Rhodopseudomonas sphaeroides ͷǤ ǡBiochim.Biophys.Acta810ǡͶͻǦͳǤ ʹǤ ǡǤǤǡǡǤǡǡǤǡǡǤ ǤȋͳͻͻͲȌ Ǧ ǡJ.Phys.Chem.94ǡͻͺǦͻͻͷǤ ͵Ǥ ǡǤǤǡǡǤǡǡǤ ǤȋͳͻͻͶȌ ǡScience264ǡͺͳͲǦͺͳǤ ͶǤ ǡǤǤǡǡǤȋʹͲͲʹȌ ǡ ǡ ǡAnnu.Rev.PlantBiol.53ǡͷͷͳǦͷͺͲǤ ͷǤ ǡ Ǥǡ ǡ Ǥ ȋʹͲͲͷȌ ǣ ǡChemPhysChem6ǡͺͳǦͺͺͲǤ Ǥ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ ȋͳͻͺͺȌ Rhodobacter sphaeroides Ǧ ʹ ʹǤͶǤͳǣ Ǧ ȋ ǡ ǡ Ȍ ǡProc.Natl.Acad.Sci.U.S.A.85ǡͻͻ͵ǦͻͻǤ Ǥ ǡǤǤǡǡǤǤǡǡǤǡǡǤǤǤǡ ǡ Ǥ ȋͳͻͻȌ Rhodobactersphaeroides ǡBiochemistry36ǡͺͷͷǦͺͳǤ ͺǤ ǡ Ǥ Ǥǡ ǡ Ǥ ȋͳͻͻͻȌ ǡ FEBSLett.455ǡͳǦǤ ͻǤ ǡǤǤǡǡǤǡǡǤǤǤǡǡǤǤǡ ǡ Ǥ ȋͳͻͻͻȌ Rhodobacter sphaeroidesǡProc.Natl.Acad.Sci.U.S.A.96ǡʹͲͷͶǦʹͲͷͻǤ ͳͲǤ ǡǤǡǡǤǤǡǡǤǡǡǤǡǡǤǡǡǤǡǡ Ǥ ȋʹͲͲͳȌ Synechococcus elongatus͵Ǥͺ%ǡNature409ǡ͵ͻǦͶ͵Ǥ ͳͳǤ ǡǤǤǡǡǤǤǡǡǤǡǡǤǡǡǤȋʹͲͲͶȌ Ǧ ǡ Nature 303ǡ ͳͺ͵ͳǦͳͺ͵ͺǤ ͳʹǤ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ ȋʹͲͲͷȌ ͵ǤͲ % ǡNature438ǡͳͲͶͲǦͳͲͶͶǤ 44 ͳ͵Ǥ ǡǤǡǡǤǡ ǡǤǡǡǤǡǡǤǡǡǤ ȋʹͲͲͻȌ ʹǤͻǦ% ǡǡ ǡNat.Struct.Mol.Biol.16ǡ͵͵ͶǦ͵ͶʹǤ ͳͶǤ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥ ȋͳͻͻͷȌ ͺͲǡ ǡProc.Natl.Acad.Sci.U.S.A.92ǡͶͻͺǦͶͺͲʹǤ ͳͷǤ ǡ Ǥ Ǥǡ ǡ Ǥ ȋʹͲͲͲȌ ǡPhotosynth.Res.63ǡͳͻͷǦʹͲͺǤ ͳǤ ǡ Ǥǡ ǡ Ǥ Ǥ ȋʹͲͲͺȌ ȋȌͶ ǡ Coord. 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Sci.U.S.A.106ǡͳͳͺͷǦͳͳͺͳǤ ͶǤ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥ ȋʹͲͲȌ ǡScience316ǡͶǦͷͲǤ 47 CHAPTER3 MultipleChargeSeparation PathwaysinPhotosystemII: ModelingofTransientAbsorption Kinetics ǤǡǡǤǡ ȋͺͲȌǤ Ǧ Ͷ Ǧ ȋȌ Ǥ ȋ Ȍ ǡ Ǥ ǯ Úǡ ǤͺͲǡͷͶͷǡ ͶͲ ȋ YǦ ǡ X ǡ Ȍ Ǥ ǡ ǡ Ǥ ǣ ǤǡǡǤǡ Ǥ ȋʹͲͳͳȌChemPhysChemǡǣͳͲǤͳͲͲʹȀ ǤʹͲͳͲͲͲͺ͵Ͳ ͵ INTRODUCTION ͳȀʹȀ b559 ȋ Ȍ ȋȋ1Ǧ3ȌǤ ȋ ͳǡ ʹ ͳǡ ʹȌǡ ȋͳǡ ʹȌǡ ȋͳǡʹȌ ͳ ʹ ǡ ȋ4Ǧ8ȌǤ ͳ ȋ2ȌǤ Ǧ Ǥȋ9Ȍǡ ȋǡ ǡ Ȍ Ǥ ͺ Ǧ ͳȀʹǦ ǡ ͷ ǡ ǦǦ ǡ ͳǡ ǦͳΪͳ ȋ9ȌǤǡ ͳ ͳ Ǧ ȋ10ȌǤ ͳ ǡ Ǥȋ11ȌǤ ȋ9Ȍ ȋȌ Ǧ ǡ Ͷͺ Ǧ Ǧ ȋ12ȌǤ ȋ13Ȍ Ǧ ȋȌ ǤǦ Ǥ ǡǤǤ Ǧ ȋ ͺʹ Ȍ ȋ ͳ ͳ ͺͲ ȌǤ ǡ Ǥ 50 Ǧ Ǧ Ǧ ȋ12ȌǤ ǦǦ ȋ14Ȍ Ǥ Ǥ ͳʹǤȋ12Ȍ ȋȌ ʹΪͳ ͳ ͳȋȌ ͳ ͳΪͳͳΪͳ Ǥ Ǥ ǡ ȋ Ȍ Ǥ Ǥȋ15Ȍslow ȋ Ǧ Ȍ ͳ ͳ ǡ Ǥ ͳ Ǥȋ16ȌʹͲǦǦǤ Ǥ ǡ Ǧ Ǥ ǡ Ǥ ȋ17Ȍ Ȍ Ȍ Ǥ 51 ͵ Ǥȋ18Ȍ Ȍ ǡǦͶ͵Ͷ ȌǦ ͳΪͳ ǡ Ǥ ȋȌ ǡ Ȁ Y ͺͲ ǡ X ͷͶͷ ͶͲ ȋȋ19Ȍ ʹ ȌǤ Ǥ Ǧ Ǥ ȋ19Ȍ Ǧ ȋ ȋ12ȌȌǤ Ǥ Ǥ ǡ Ǥ TheModel ȋǤǤ ȌͺͲǤ Ǧ Ǥ ȋ ͳǡ ʹǢ ͳǡ ʹǢ ͳǡ ʹȌ Ͷ ȋʹΪͳǡ ͳΪͳǡ ͳΪͳǡ ͳΪͳȌǤ ȋͳǡ ʹȌ ͺͲ Ǥ ȋ ͵ Ψ ͺͲ 52 Ǥ ǡ Z ͺͲ ȋȋ20ȌͶȌǤ Ǥ ǡ Ǥ ȋ Ȍǡ ͳʹΪ ͳΪʹǤ ǡ ȋ ʹΪͳȌ ͳ Ǥ ȋ ʹΪͳȌǤ ǮʹΪͳǯǤ ʹΪͳͳΪͳǤ Ǧ ȋ14Ȍ ͳΪͳ Ǥ ͳΪͳ ȋ ǮͳΪͳǯȌǤ ǮʹΪͳǯ ǮͳΪͳǯ ȋ Ǧ Ȍ ǦǤ ȋ Ǥǡ ʹͲͲȌ ʹΪͳ ǡ ȋͳΪͳǡͳΪͳȌ ȋͳΪͳȌ Ǥǡ ʹΪͳǤ ȋ ʹΪͳȌ ȋͳΪͳǡ ͳΪͳȌ Ú Ǥ Ú ȋ Ȍ ǡ ȋ ȌǤ ǡǦ ¦ ǡ Ǧ ȋαͳǦ αȌǦ ǡ ǡ ǦǦ ȋʹȌǤ 53 ͵ Ú ǡ ǡ Ǥ ͳΪͳ ÚȀ Ǥ ͳǤ ÚǡÚǡȋ21Ȍ Ǥ Ú Ȃ ȋ21Ȍǡǡ ÚǤ Ǥ ǡ Ǥ ȋȌ ͳǤ Ͷ ʹǤ Ǧ ʹΪͳ ȋ12ȌǡǦ ȋ8ȌǤ abǦinitio ȋȋ10ȌȌ ȋ ǡʹȋ6ȌȌǤ ͺ Ǧ ͶǦͳͲ ȋ ͳȌ ȋ12ȌǤ Ǥ Ǥ Ǧ ȋ12ȌǤ ȋ Ȍ Ǥ Ǧ OͲα͵ͷ Ǧͳ JͲα ͶͲ ǦͳǤ Ͷͺ Ǧ ȋͳȋ22ȌȌǤ ȋ ȌǤ ͳǤ 54 Table1. ȋȌ ǡ O ȋ ǦͳȌǡ Ǧ ȋȌǡ ȋȌVȋ ǦͳȌǡ ȋȌǤ Ǥ V OǤ ͳ ǡȏ ǦͳȐ O ȋǦOǡȏ ǦͳȐȌ ͳͷʹͲȋǦͷͶͲȌ ͳ ȏȐ ͻǤ͵ ȏȐ ͳǤͶͳ ȏȐ ͶǤͲ ʹ ͳͷͳͻͲȋǦͷͶͲȌ ͳ ͺʹǤ ͻͷ ʹ ͳͷͳͲͲȋǦͷͶͲȌ ͳ ͺǤͺ ͻͷ ͳ ͳǤͶͳ ͶǤͲ ͳ ͳǤͶͳ ͶǤͲ ͳ ͳͷͲ͵ͲȋǦͷͶͲȌ ͳ ͻͲǤͳ ʹ ͳͷͲʹͲȋǦͷͶͲȌ ͳ ͻͲǤ ͻͷ ͳ ͳǤʹʹ ͵Ǥͳ ͻͷ ͳ ͳǤʹʹ ͵Ǥͳ ͳ ͳͷͲͲͲȋǦͷͶͲȌ ͳ ʹΪͳ ͻͳǤ ͻͷ ͳ ͳǤͶͳ ͶǤͲ ͳͷͳͺʹȋǦͺͳͲȌ ͳΪͳ ͳͷͻͻʹȋǦͳʹͲȌ ͳǤͷ ͻͷǤͺ ͳͻͲ ʹ ͵ͺȗ Ͳ ͵ ͻͷǤͺ ͵ͺͲ Ͷ Ͷͻȗ ͳΪͳ Ͳ ͳΪͳ ͳͷͺͶʹȋǦͳʹͲȌ ͵ Ͳ͵Ǥͳ ͵ͺͲ Ͷ ͷͳȗ Ͳ ͳͳ͵ʹȋǦʹͳͲȌ Ͷ ͳͷǤ ͷͲ Ͷȗ Ͳ V V ȏ ǦͳȐ ͻͷ ͳ ȗȌ Ǧ ȋǤǤ Ȍǡ Ǥ ȋ9ȌǤ Ǥ ʹǤͺ Ǥ Ǧ Ǧ Ǥ ǡ Ǧ ȋ Ǧ ǡ ǡ ǤȌǤ ǡ ȋ14ȌǤ 55 ͵ ͳΪͳ ͳΪͳ ʹΪͳ ͳ ͳͷͲ Ǧͷͷ Ǧ ͳ ǦͶʹ Ͷͷ Ͳ Ͳ Ͳ ʹ Ǧ͵ ʹͲ Ǧʹ Ǧͷ Ͷͷ Ͳ Ͳ Ͳ ʹ Ǧͷ ͵ Ͳ Ͳ Ͳ Ͳ ͳ Ǧ͵ Ͷ Ͳ Ͳ Ͳ Ͳ ʹ ǦͶ Ͳ Ͳ Ͳ Ͳ ͳ Ͳ Ͳ Ͳ Ͳ ʹΪͳ Ͳ Ͳ Ͳ ͳΪͳ Ͳ ͶͲ ͳΪͳ ͶͲ ͳΪͳ ͳ ʹ ʹ ʹ ͳ ͳΪͳ Table2. ȋǤ ȋʹͲͲͺȌȌǡ ǡ Ǧ ȋ ǦͳȌǤ Ǥ RESULTS ͳͶͲͷͶͷ Ǥ ͷͶͷ ͷͷǦͲΨ Ǥ ͳ ʹ ͺͲ ȋͷ Ȍǡ ǤǤ Ǧ ǡ ͳǡͳǡʹȋ9,12ȌǤ ͷͶͷ ͳ ʹ ǡ ǤǤ ͳΪͳ ͳΪͳ Ǥ ͶͲͳΪͳͳΪͳǤ 56 ͶͲ ͳΪͳ ȋ ȋ12ȌȌǤ ǡ ͶͲ ͷͶͷ ͳʹ Ǥ Figure1. ͺͲ ǤRedpoints: ͶͲ ȋ19Ȍ ȋͶͺͷǦͶͻͲ Ȍ Ǥ Greenpoints: ͷͶͷȋ19Ȍ ȋ ͷʹͷ ͷͲ ȌǤ ͷͶͷ ͶͲ ȋȌ ȋεͷͲȌǤBluelines: ȋͳΪʹΪ ͳΪͳΪͳΪͳȌȋͳΪͳΪͳΪͳȌǡ XͷͶͷͶͲǡ ǤInset: Ǥ ȋ Ȍ ǡ Ǥ ǡǡͺͲ Ǥ 57 ͵ ʹ ȋ ͺͲ Ȍ Ͳͳ ȋȌǡ ȋǡ ǤǤ Ǯǯ ǡ ͳȌǤ Figure 2. ͶͲǡ ͷͶͷǡ ͺͲ ͺͲ Ǥ ȋ Ǥǡ ʹͲͳͲȌǡ ȋͶͲ ȌǤ Right:ȋ ͳȌǢ ȋ Ȍ Ǥ Leftǣ ȋȌǤ Ǧ ȋʹǡȌ ͺͲͶͲ ͳͲȋ ͳȂ ǡ Ȍ Ǥ ǣ ͳΪͳ ͳΪͳ ͳ Ǥ ǡ ͺͲ ͶͲǤ 58 ǡ ͺͲ ͶͲ ͷͶͷ Ǥ Ǧ ͺͲͶͲ ͷͶͷǤ Ǧ ͺͲ Ǧ ͶͲ ͷͶͷ ǤǦ ȋ ʹǡ Ȍ ʹΪͳ ͺͲ Ǥǡ ȋʹΪͳ ĺ ͳΪͳȌ ͳ Ǥ ͳ ȋ ͶͲ Ȍ ȋͳΪͳ ĺ ͳΪͳȌǤ ǡ ȋʹΪͳĺͳΪͳĺͳΪͳȌ ͶͲ ͺͲ Ǥ ͵Ǥ ǡ ͺͲ ͳ ȋ ǦͺͲȌǤ ʹ Ǥ ǤʹΪͳ ǡ ȋ ʹͲͲ Ȍ Ǧ ǤʹΪͳĺͳΪͳ ʹΪͳͳΪͳ ͵Ǥ Ǧ ͳȗĺͳΪͳȋͳȗ ͳȌǤ ͳΪͳ ͲͲǤ ͳΪͳĺͳΪͳͳΪͳĺͳΪͳ ʹͲ Ǥ ȋȌ ȋȌ Ǥ Ǧ Ǧ Ǥ ȋ ǤȌ Ǥ 59 ͵ ͶͲ ͳΪͳ ͳΪͳ Ǥ ͶͲ Ǥ Ǧ ͳΪͳ ȋ ͵Ȍǡ ͶͲͷͶͷ ȋ ʹȌǤ Ǧ ʹΪͳ ȋ ͵Ȍ ͺͲ Ǥ Figure3. ͺͲ Ͷ ǤͲǦͳȋȌͲǦ͵ǤͲȋȌǤ ȋ Ȍ Ǧ ǡ ȋ Ȍ Ǧ ȋʹȌǤ 60 ͶͲͷͶͷ Ǥ Ǧ ͶͲ ͷͶͷ ȋ ͷͲǦͲ ͳȌ ʹ ȋ ͵ȌǤǦ ȋ ͷͲ Ȍ ͳ Ǥ DISCUSSION Assignmentofthetimeconstants. ȋ Ȍ Ǥ ȋ19Ȍ ͲǤͷ ǡ ͵ ʹͲ Ǥ ͲǤͷ ͲǤͲǤʹǡ Ǥ͵ʹͲ Ǥ Ǧ ͵ ͳ ͳΪͳ ͳΪͳǡ Ǥ ͳΪͳͷͺ ͳ͵ͳȋ ʹʹ ȌǤ ͵ͲǤʹͲ Ǥ͵ ͲǤ ǣ ȋͲǤ Ȍ ͳΪͳ ȋ ȋ19ȌǡͳΪͳȌǤ LongǦlived trap states. ͲǦͷ ȋ ͳȌǤ ͲǦͳ ȋ ʹȌ ʹ Ǥ ȋ ͶͲ ͷͶͷ Ȍ ͷͲ ȋ ͳȌǤ Ǧ ȋ19ȌǤ 61 ͵ ͷ ȋ23Ȍ Ǥ ȋǦȌͷ ͳͲΨǤǡ Ǥ ǡ Ǧ ȋͷ ͷͺͷ Ȍ ȋ19ȌǤ ʹΪͳ ͳΪͳǡ ǡ Ǥ ǡ ǡ ͳȗͳΪͳ ͻͷ ͵ͺͲ Ǧͳ ȋȌǡ Ǥ ʹͷͲ Ǧͳǡ ͳȗ ǡ ȋ Ȍ ȋ ȋ19ȌȌǤ ComparingPSIIRCandbacterialRC. 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Chem. Chem.Phys.12ǡ͵ͷʹǦ͵ͷǤ 65 ͵ ʹʹǤ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ ȋʹͲͲͷȌ Ǧ ǡ Biophys.J.89ǡͳͶͶǦͳͶͺͳǤ ʹ͵Ǥ ǡǤǤ ǤǡǡǤǡ ǡǤǡǡǤǤ ȋͳͻͻͺȌ ǣ Ǧ ǡProc.Natl.Acad.Sci.U.S.A.95ǡͳʹͺǦͳ͵͵Ǥ ʹͶǤ ǡ Ǥ ȋʹͲͲͶȌ ǣ ǡPhys.Rev.Lett.93ǡͳͺͺͳͲͳǤ ʹͷǤ ǡǤǤǡǡǤǤǡǡǤǡǡǤǤǤǡ ǡ Ǥ ȋͳͻͻȌ Rhodobactersphaeroides ǡBiochemistry36ǡͺͷͷǦͺͳǤ 66 CHAPTER4 UltrafastCarotenoidBandShifts Correlatedwith ChlZExcitedStatesinthe PhotosystemIIReactionCenter: AretheCarotenoidsInvolvedin EnergyTransfer? ǡǤǤǡǤ ȋȌ ʹ ȾǦ ǡ Ǥ ǣ ǡǤǤǡǤ ǤȋʹͲͳͳȌ Phys.Chem.Chem.Phys.(Communication)ǣͳͲǤͳͲ͵ͻȀͲͲʹͺͻ . Ͷ Ǥ ǣǤ ǡ ȋȌ Ǥ ȋȌǡȋȌȾǦ ȋȌǤǦ ȋ1,2Ȍ ǡͳʹǡ ȋȌ ȋͳȌǤ ȾǦ ǡ ͳ ʹ ȋͳȌǤ ǡ ǣ Ȍ ͺͲ ȋ3Ȍ ȋ4Ȍ Ȍ Ͳ ʹͲȋ5Ǧ7ȌǤ ʹ ʹȋǡ ȌǤ ȋȌ Ͳ Ȃ ʹ ͶͶʹǡ ͶͶ ͷͲ ͶͷͺͶͻͲ ȋ8Ǧ10ȌǤǡͶͷ Ͷͷͺ ȋͳȌͶͶȋʹȌͶͺͻͷͲ ͳʹǡ ȋʹȌǤ ǣ ǡǦ ǡ Ǧ ȋȋ11Ȍ ȋ12ȌȌǤǡ ȾǦ ǦǦ ʹ Ǥ Dzdz ͳ ȋȌȋ13Ȍȋ ʹ ȌǤ 70 Figure 1Ǥ ȋ ȋ2ȌȌǣ ȋblackȌǡ ȋredȌǡ ȋblueȌ ȋorangeȌǤ ǡ Ǥ ǡ ǣ Y ͲͺͷȋͷȌǡ ʹ ͺʹ ȋͺ Ȍǡ Ǧ ͷ ȋͳʹȌǤ Ǥ B Abs / a.u. A 4 Abs PSII RC Abs PSII RC 5 nm blue shift Abs difference 8 Absdiff 2 660 nm 660 nm 6 CarD2 3 D 3 662 nm 665 nm 665 nm 500 fs 'Abs / mOD C Abs PSII RC Abs PSII RC 5 nm blue shift Abs difference CarD1 CarD1 CarD2 670 nm 2 500 fs 2 3 ps 20 ps 460 480 500 Wavelength / nm 2 670 - 675 nm 685 nm 20 ns 0 520 660 - 665 nm 600 ps 20 ns 670 nm excitation 680 nm 300 ps 300 ps 600 ps 0 670 nm 675 nm 20 ps 1 1 4 1 3 ps 540 680 nm excitation 460 480 500 0 520 Wavelength / nm 540 3 ps component 460 480 500 0 520 Wavelength / nm 540 ChlZ SADS 460 480 500 520 Wavelength / nm 540 Figure 2. Ǥ Ǥ ȋ Ȍ ǡ ͷ ȋthicklinesȌǢ ȋȌȋȌ Ͳ ȋȌ ͺͲ Ǥ ȋȌ ͵ ǤȋȌ ȋȌ ȋͲǡͷǡͲͷȋͷȌǢʹ ȋͺȌǢͷȋͳʹȌ ȌȋͲǦͷ ͲǦͷȌǡȋͲǡ ʹǡͷͲȌ ȋthicklineȌǤ 71 Ͷ Ǥ ȋȌ ǡ ǤǤ ȋ14ȌǤ Ǧ ǣͷͲͲǡ͵ǡʹͲǡ͵ͲͲǡͲͲʹͲǤǡ Ǥ ȋȌ ȋ ȋ4Ȍ ʹȌǤ ʹ Ǣ Ǥ ǡ Ͷͷ Ͷͻʹ ȋǤ ʹǡ ȌǤ ǡ ͷͲͲǡ͵ʹͲǤ ǣͶͷͷǡ XȋͲǦͳȌ ͷͳʹ ͷͲͲ͵ Ǥ ȋ4Ȍ ʹǤ ʹͲǤ ǡͶͷͶͻʹ ȋ ʹȌǣ Ͳ Ͳ ǡ ͷ ͺͲͺͷ Ǥ ȋʹȌǤ ȋȗȌǤ ʹ ȋ15Ȍ ͺͲͲ ͺͷͲ Ǥ Ǥ 72 ȋ16ȌǤ ȋȌ ȋ17ȌǤ ǡ ȋ ʹǡ ȌǤ ǡ ǡ Ͷͷ Ͷͻʹ ǡ ȋͷȂȌ YǤ ǣ ǡ ǡ ǫ ǡ Ͳ Ȃ ʹ Ǥ Ǥ ǡǡ ǣ Ͳ Ȃ ʹ Ǥ ȋ Ȍ Ǥ Ǥǡ ȋ ʹ ȋ18ȌȌǤ ǡ ȋʹͲȌǦͳȋ5Ǧ7Ȍǡ Ȁ Ú ǡ ǡ ȋͳͲͲȌǦͳȋ19,20Ȍȋ ȌǤǡ ʹ ͺͲͲ ͺͷͲ ͺͲͲͺͷͲ ǡ γ͵ͲΨǤ ǡ ȋ ǤͷͲȂͲΨȌͺͲͲͺͷͲȋ21ȌǤ 73 Ͷ ǡ ȀÚǤǡ Ǥ CONCLUSIONS ȾǦ ͲȂʹǤ Ǥ ǡ Ǥ ACKNOWLEDGMENT Ǥ ʹȋǦǦͷͲͷͲͻȌȋǤǤȌ ȋȌǤ 74 REFERENCES ͳǤ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ ȋʹͲͲͷȌ ͵ǤͲ % ǡNature438ǡͳͲͶͲǦͳͲͶͶǤ ʹǤ ǡǤǡǡǤǡ ǡǤǡǡǤǡǡǤǡǡǤ ȋʹͲͲͻȌ ʹǤͻǦ% ǡǡ ǡNat.Struct.Mol.Biol.16ǡ͵͵ͶǦ͵ͶʹǤ ͵Ǥ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥ ȋͳͻͻͷȌ ͺͲǡ ǡProc.Natl.Acad.Sci.U.S.A.92ǡͶͻͺǦͶͺͲʹǤ ͶǤ ǡ Ǥǡ ǡ Ǥ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ ȋʹͲͳͲȌ ǡBiochemistry49ǡͶ͵ͲͲǦͶ͵ͲǤ ͷǤ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥ ȋͳͻͻͶȌ ǫǡ Biochemistry 33ǡͳͶͺǦͳͶͶǤ Ǥ ǡ Ǥ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥ ȋͳͻͻͶȌ ǡ ǡ Biochim. 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Phys.Chem.B101ǡͳͲͷͲǦͳͲͷǤ ͳͻǤ ǡ ǤǡǡǤǡǡǤȋʹͲͲͷȌ ǣ ǡBiophys.J.88ǡͻͺǦͻͻͺǤ ʹͲǤ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ ȋʹͲͲͷȌ Ǧ ǡ Biophys.J.89ǡͳͶͶǦͳͶͺͳǤ ʹͳǤ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥ ȋʹͲͲͲȌ ǣ ͺͲͲ ͺͷͲ ǡJ.Phys.Chem.B104ǡͳͺͷͶǦͳͺͺǤ 76 CHAPTER5 TheElectronicStructureof PhotosystemII: StarkSpectroscopyon Site–directedMutants ǡ ǤǡǤǡǤ Ǧ Ǥ ȋȌǦ SynechocystisǤ ͺͲ͵Ǥ Ǧ ǣ ͳǡʹǡͳͳǤ ȋȌ ǣ ȋͳɁǦʹɁΪͳȌȗ͵ ȋͳɁΪͳɁǦȌȗͺͳǤ ǡ ʹΪͳ ȋʹΪͳȌɁȗͺͶȋ ȌǤ ǡ ǡ ǡ ȋ ǡ ȌǤ Ǧ Ǧ Ǥ ǡ Ǧ Ǥ Manuscriptinpreparation ͷ INTRODUCTION Ǧ Ǥ Ǧ ȋȌǡǦ ȋ ǡ ǡ ȌǤ ȋȌ Ǥ Ǥ Ǧ ȋ1Ǧ4Ȍ ǡ Ǥ ȋȌǡ ȋȌ ȋȌ Ǣ ǡ ǡ ȾǦ Ǥ ȋͳǡ ͳǡ ͳǡ ʹǡ ʹǡ ʹȌ ǡ ȋ Ȍ Ǥ ǡ ǡ ȋǦ Ȍ ǡ ǡ Ǥ ǡ ȋ Ȍ Ǥ ȋ5, 6Ȍ ȋ7Ǧ11ȌǤ ǡ ȋ10, 12Ȍ ȋ11Ȍ ǡ ǡ Ǧ ǡ ȋͳͳȌ ȋͳʹͳȌǡ ȋ ȌǤ ǡ Ǧ Ǥ Ǥ 80 ȋ ȌǤ ǡǦ ͳͳǡǣ ͳǣ ȋͳͳȌȗĺͳΪͳĺͳΪͳ ͳǣ ȋͳʹͳȌȗĺʹΪͳĺͳΪͳĺͳΪͳ ȋ ȗ ĺ ǡ Ȍǡ ȋȌ Ǥ ǡ Ǧ Ǥ ǡ Ǥ ȋȟμȌ ȋ10, 13, 14Ȍ Ǥ ǣ ǡ ǡȟμǡ ǡȟȽǡ Ǥ ȟμ ǤȟȽ ȋ13, 14ȌǤ ǡ Ǥ ȋ Ȍǡ Ǥ ǡFieldonFieldoffǡ Ǧǡ ǡǡ ȋ15ȌǤ ȟȽ ȟμ ǡ ǡ ȋ ȌǤ ȋʹȌȋ16ȌǡǡȟμǤ 81 ͷ ǡ ͷ ʹȋǦ ȌǤ ǡ Ǧ ǡǣȌ Ȍ Ǧ ʹȋ10ȌǤǡ ʹ Ǥ Ǥ Y Ǥ ǡ ǣ Ǧ Ǥ ǡ ǤǤ ǡ Ǧ Ǥ ǡ Ǧ ȋȌǤ Ǥ Ǧ ǣ Ȍ ȋ17,18ȌǢȌ Y ȋ19ȌǢ Ȍ ͳ ʹ ΪȀ ǡ ǡ ͳʹǡ ͳǦͳͻͺǡǡʹǦͳͻȋ20ȌǢȌ ȋ20Ȍ Ǣ Ȍ ȋ21ȌǤ 82 ǡ Synechocystis Ǥ ͺͲ͵ ȋSynǤȌ Ǧ Ǥ ȋͳǡ ͳǡ ʹ ͳȌǤ Ǥǡ Ǧ ͳǦͳ͵Ͳͳ͵ͳǦ ͳ Ǥ ǡ Ǧ ͳǡ ʹ ͳ Ǥ ǡ ǡ Ͷ͵ Ͷ Ǥ Ǥ Ǧ ͳǦͳ͵Ͳ ͳ͵ͳǦ ͳ ȋ ͳȌ Ǥ Ǧ ȋȰȌ SynǤ SynǤ ͳǦͳ͵Ͳ ȋ Ȍ ȋ ȌǤ ȰεȰͳǦ ͳ͵Ͳ εȰSynǤȋ17ȌǤǡ Ȱ ǡ Ȱ ͳǦ ͳ͵Ͳ γ ͲǤͷ Ȱ SynǤ γ ͲǤͷͷǤ Ǧ ͳǦ ͳ͵Ͳ Ȱ ȋγ ͲǤ͵ͷȌǤ ǡ ǡǦͳ͵ ͳǦ ͳ Ǧ ȋȌ ȋ22ȌǤ ȋȌ ȋEȌ ͳ͵ͳǦ ͺͶȋ22ȌǤ Ǧ Ǥǡ SynǤ ͳǦ ͳ͵Ͳ ȋ ȌǤ 83 ͷ Figure 1Ǥ ȋͳǦ ͳ͵Ͳǡ ͳǦͳͻͺǡ ʹǦͳͻ ͳǦͳͻȌ ȋ ǡ ǡǡ Ȍȋȋ4ȌȌǤ ȋͳǡʹͳȌǤǦ ǣ ͳ ȋͳǦͳͻͺ ǡ ͳǦͳͻͺ ͳǦͳͻͺȌǢ ʹ ȋʹǦͳͻ ǡ ʹǦͳͻ ʹǦͳͻȌǢ ͳ ȋͳǦͳͻȌ ȋ ͳȌǤ ȋ17,20,23ȌǤͳʹ ȋȌ ͳʹ ȋ Ȍǡ ȋȌ ȋȌǤ ɎǦ Ǥ ǡ ͳʹ ͳ Ȁ ʹ ȋ20ȌǤ ǡ ʹǦͳͻ ͳ ǡ ȋ24Ȍǡ ͳ͵ͳǦ ͳ Ǥǡ Ǧ ʹǦͳͻ ͳȋ25ȌǤ 84 ǡ ǡ ǡ ǡ ͳʹǡ Ǧ Ǧ Ǥ ͳǦͳͻ ǡ ȋȌǡ ͳǡ ͳ ͳ ȋ23ȌǤ ȋ20, 23Ȍ Ȍ ͺ͵ ͳ Ȍ͵ ͳ ʹǤ ǣͳ ȋ ȋ11, 26, 27ȌȌǢ ͳ ʹ ȋ ȋͳȌ ȋ11, 26, 27ȌȌǢ ͳ ȋ ȋ20, 28Ȍ ȋ11ȌȌ Ǥ Ǧ Ǥ ȋȌ Ǧ ǣ ͳǦ ͳ͵Ͳ ǡ ͳǦͳͻͺ ǡ ͳǦͳͻͺǡ ͳǦͳͻͺǡ ͳǦͳͻǡ ʹǦͳͻ ǡ ʹǦͳͻ ʹǦͳͻǤ ǣ ȋͳɁǦʹɁΪͳȌȗ͵ ȋͳɁΪͳɁǦȌȗͺͳǤ ǡ ʹΪͳ ȋʹΪͳȌɁȗͺͶ ȋ ȌǤ ǡ ȋͳɁǦʹɁΪͳȌȗ͵ǡ ȋͳɁΪͳɁǦȌȗͺͳ ȋʹΪͳȌɁȗͺͶ Ǥ 85 ͷ MATERIALSANDMETHODS Sample preparationǤ Synechocystis Ǥ ͺͲ͵ ȋ17ȌǤ Synechocystis Ǥ ͺͲ͵ ȋ20, 29ȌǤ ȋ30ȌǤ Ǧ ȋȌ Ǧ ȋȌ Ǥ Ǥ ͷͲ Ǥͷǡ ʹͲ ʹǡ ͷ ʹǡͳͲͲɊ͵ȋȌǡͲǤͲ͵ΨȾǦͷΨ ȋȀȌǤ͵ȋȌ Ǥ ʹͲǤͷǡʹͲǡͷʹǡͲǤͲͻΨ ȾǦ ͷΨ ȋȀȌǤ ͵ȋȌ Ǥ SpectroscopyǤ Ǧ ȋ31, 32ȌǤ ȋ ͺͲɊȌͲǤ ǦͳǤ ǡ Ǥ ͶͷǏ ǡɖǡ Ǥ ʹǤʹͷͳͲͷ ǦͳǤ 86 RESULTSANDDISCUSSION PheD1mutant SynechocystisǤͺͲ͵ȋSynǤȌͳǦ ͳ͵Ͳ Ǣ ȋͳǦ ͳ͵ͲȌʹǤ SynǤ ͳǦ ͳ͵Ͳ Ǧ Ǥ 650 660 670 680 690 700 710 530 540 550 560 550 560 Absorption / a.u. 0,4 Synechocystis. RC WT D1-Q130E Spinach RC WT 0,02 Synechocystis. RC WT D1-Q130E Spinach RC WT 0,2 0,01 0,0 -4 1x10 -5 2x10 Stark -5 1x10 0 0 -1x10 -4 -5 -1x10 680 650 660 670 680 690 Wavelength / nm 690 700 710 530 540 Wavelength / nm Figure2Ǥ Synechocystis ͳǦ ͳ͵Ͳ Ǣ Ǥ ȋLeft panelȌ Ǧ Y ǡ ȋinsetȌ ͺͳ Ǣ ȋright panelȌ X Ǥ ͶͷǦͳͲ Ǥ ɖαͷͶǤǏ ʹǤʹͷͳͲͷ ǦͳǤ 87 ͷ AbsorptionǤʹ SynǤǡͳǦ ͳ͵Ͳ Ǧ Y X Ǥ SynǤ Ǥ SynǤ ǡ Ͷ ǡ ǤǤǡ Ǧ ȋ ȌǤ ǣͳʹ SynǤ ʹ Ǥ ǡ SynǤ ͳͺǤͷ Ǥͷ ǡ ȋ ͲǤͷ ȌǤ SynǤ Ǥ ǡ SynǤ SynǤ Ͷ ȋ ǡͳȌǤ X ǡ ͳǦ ͳ͵Ͳ ʹǤͷXͷͶͲ ͷͶʹǤͷȋ17ȌǤ ǡ Ǥ ͳǦͳ͵Ͳ ȋ ͳǦ ͳ͵Ͳ Ȍǡ XͷͶ͵ǤͷǤX ȋ ȌǤ StarkǤ ʹ SynǤ ͳǦ ͳ͵Ͳ ǡ ǦY XǤ ȋʹȌ ȋ ͵Ȍ ǡǡ ǡ ȟɊǡ Ǥ ȋ33Ǧ35Ȍ ȋ Ȍ ȋ16ȌǤ ȋ Ȍ ȋͳǡͳǡͳȌ ȋʹȌǤ 88 -4 Stark 5x10 -5 Synechocystis RC WT 2DAbs 1x10 Synechocystis RC D1-Gln130Glu 2DAbs 1x10 -4 Spinach RC WT 2DAbs 0 0 0 -5x10 -1x10 -5 -1x10 650 660 670 680 690 700 Wavelength / nm -4 650 660 670 680 690 700 Wavelength / nm -4 650 660 670 680 690 700 Wavelength / nm Figure 3Ǥ ȋʹȌ ȋfromlefttorightȌSynechocystis ͳǦ ͳ͵Ͳ Ǣ Ǥ ɖαͷͶǤǏ ʹǤʹͷͳͲͷ ǦͳǤ ǡ ʹ ʹ ȋ16Ȍ ȋ10ȌǤ ʹ ͲǦͷͲ ǡ ʹ ȋ16ȌǤ SynǤ ͳǦ ͳ͵Ͳ ǡ ǡ ͳǦͳ͵Ͳǡ ǤǤǡ Ǧ ͳǦͳ͵Ͳ ͳ͵ͳǦ ͳǤ SynǤY ʹǤͷͺͲǤͷǢǡͺͷ ͺͻǤͷ ȋȌǤ ͳǦ ͳ͵Ͳ ǡ Ǥ Ǧ ͺͲǤͷ Ǥ Y ͲǤͷͺͳǢ ͵ǡǤͷͺǤͷȋ16ȌǤ SynǤ Ǥ ͲǤͷ SynǤ ͺͳ ͺͲǤͷͳǦ ͳ͵Ͳ Ǥ 89 ͷ ͳǦ ͳ͵Ͳ ͺͲǤͷ ͳǦͳ͵ͲǤ Xǡ ͳ ͳǦ ͳ͵ͲȋSynǤ Ȍ ͳǦ ͳ͵ͲȋSynǤȌǤ SynǤ ͳXͷͶͲȋ Ȍ ͷͳͲǦ ȋȟȀǤǤȌǢ ͳǦ ͳ͵Ͳ ͳX ͷͶʹǤͷ ͷͶ͵Ǥͷ ȋͲǤͷ Ȍ ͳ͵ͳͲǦ ͳͷͳͲǦ ȋȟȀǤǤȌǡ Ǥ Ȍ ͳ ͺͲǤͷǦͺͳ ǢȌ Ǧ ͳǦͳ͵Ͳ ͳ͵ͳǦ ͳ ȋ Ȍ ǦͺͲǤͷǦͺͳȋ SynǤȌǤ ȋͳǡʹ ͳ Ȍ ȋ10Ǧ12Ȍ ȋͳͳȌȗͳΪͳ ȋͳɁΪͳɁǦȌȗ ͺͲǤͷǦͺͳ SynǤ ȋ ɁΪ ɁǦ ȌǤ ͳǦͳ͵Ͳ ͳǦ ͳ͵Ͳ ȋȰȌ ͲǤͷͷ SynǤ ͲǤͷ SynǤ ȋ Ȱ ȌǤ ǡ Ȱ ͺͲǤͷǦͺͳ Ǥ ǡ ʹ ȋ ͵Ȍǡ ʹ ǡ Ǥ ʹ Ǥ ǡ SynǤ ǡ ͺͻǤͷ ȋ ʹȌǤ SynǤ ͺͲǤͷ Ǥ 90 ǡ ͳ ͺͲǤͷSynǤǤ ȋ ͺǤͷ ȌǤ ǡ ͺͳ ͺͶȋʹȌǤ ͺͳǤ ͺͲǤͷǦͺͳ ʹ Ǧ ȋ͵ȌǤ ȋ10Ǧ12ȌǡʹΪͳ ȋͳʹȌȗ Ǥ ǡ Ǧ ȋʹΪͳȌɁȗ ͺͶ ȋ Ɂȗ ȌǤ ǡ ȟɊ ǡ ǡ ǤǡȋʹΪͳȌɁȗ ͺͲǤͷǦͺͳ Ǣ ͺͻǤͷ SynǤǡ ͺͶ Ǥ 91 ͷ PD1,PD2andChlD1mutants Synechocystis Ǥ ͺͲ͵ ǡ ͳǦͳͻͺ ʹǦ ͳͻ ǢǡͳǦͳͻͺʹǦͳͻǢǡͳǦ ͳͻͺ ʹǦͳͻ Ǣ ͳǦͳͻ ͶǦǤ QYabsorptionregion AbsorptionǤͶ YǤǦ ǡ Ͷ͵ Ͷ Ǥ ȋ Ȍǡ Ǥǡ ǡ ͶͷǦͳͲǤ ȋȌȋͶȌ ȋȌ ȋ Ȍ Ǥǡ ͳȀͷ ȋ͵ͷʹȌ ȋǣʹǡͶ͵ǣͳ͵ǡͶͳǡ YȌǤǡ ʹͲΨ Ǥ ǡ Ǥ ǡ ȋ ͶȌ ȋ ȌǤ ͳǦͳͻͺ ʹǦͳͻ ͳ ʹǡ Ǥ 92 650 660 670 680 690 700 710 650 660 670 680 690 700 710 Absorption / a.u. 0,8 0,6 0,4 0,2 WT D1-His198Gln WT D1-His198Asn D1-Gln D1-Asn minus WT D2-His197Gln minus WT D2-His197Asn D2-Gln D2-Asn minus WT minus WT 0,0 -0,2 -4 Stark 1x10 0 WT D1-His198Gln -4 -1x10 700 D2-His197Gln 650 660 670 720 WT D1-His198Asn 740 D2-His197Asn 680 690 700 710 650 660 Wavelength / nm 650 660 670 680 690 670 680 690 700 710 700 710 Wavelength / nm 700 710 650 660 670 680 690 Absorption / a.u. 0,8 0,6 WT D1-His198Ala WT D1-Thr179His D1-Ala D1-Thr 0,4 minus WT D2-His197Ala minus WT 0,2 D2-Ala minus WT 0,0 -0,2 -4 Stark 1,0x10 0,0 -4 WT D1-His198Ala -1,0x10 WT D1-Thr179His D2-His197Ala 650 660 670 680 690 Wavelength / nm 700 710 650 660 670 680 690 700 710 Wavelength / nm Figure4Ǥ Synechocystis YȋfromlefttorightȌǣǡͳǦͳͻͺ ʹǦͳͻ Ǣ ǡ ͳǦͳͻͺ ʹǦͳͻ Ǣ ǡ ͳǦͳͻͺ ʹǦͳͻ Ǣ ͳǦͳͻ Ǥ ͶͷǦͳͲ Ǥ Ǥ ɖαͷͶǤǏ ʹǤʹͷͳͲͷ ǦͳǤ 93 ͷ ǡ ǡͳ ǡʹ ȋͶȌǡ ȋ ͳȌǤ ȋͳǦͳͻͺ ǡ ͳǦͳͻͺǡ ʹǦͳͻ ʹǦͳͻȌ ͷ ͺ͵ ȋͶȌǤͳǦͳͻͺ ͷ ǡ ͵ ͳʹȋͳʹ ȌȋȌȋ20,23,36Ȍ Ǥ ʹǦͳͻ ͷ ʹ ͳʹ ͳǤ ͺ͵ʹǦͳͻǤ ͺ͵ ͳʹǦͳͻ Ǥ ͳ ǣ Ǧͳ͵ͳǦ ͳɎǦ Ȁ ͳ Ǥ Ǥ ǡ Ǥ ǡ ǡ ǤǤǡ Ǥ Ǥ ǡ ǡ ǡ ǡ ͳʹǤ ǡ ͳ ʹǡ Ǥͺ͵ǡ ͷ ͳ Ǥ ȋ ͳȌ ǡ ͳ Ǥ ͳ ʹ ǡǤǤǡ Ǧ ͷ ȋ ͳȌ ȋ23,28ȌǤ 94 Ǧ Ͳȋ28Ȍ ǡ Ǥ ͳǦͳͻǡ ͳǡ ͳ ʹǤ ͺͳǡͳ ȋ Ȍ ͺ Ǥ ȋ Ͳ ͲͲ ʹͷ Ȍ ȋ ǡͺͳ ͺͳȌǤ ȋ23Ȍ ȋ36Ȍ ͳ ǡ Ǥǡͺͳ ͳ ͳ ǡͳ ǡǡ ͳʹ Ǥǡ Ǧ ȋ10, 11, 20, 23, 37Ȍǣ ͳʹͳ Ǧ ͷ ǡ ͳͳ ȋ X Ȍ ͺͳ ǡ ȋ ȌǤ Stark. ǡǡ ȋʹȌȋͷȌ ǡ ǡ ǡ ȟɊǡ Ǥ ȋ33,34Ȍȋ16Ȍȋ ȌǤ ǡ ǡ Ͷ͵ͶǤ ȋ Ȍ ǡ Ͷ͵ Ͷ ȋ30, 38Ǧ41Ȍ Ͳ Ǧ ͺͲȋͳȌǤ ǡ Ǥ 95 ͷ ǣȌ ȋͶȌ ǡȌ ȋʹȌ ȋͷȌǤ Stark WT 2DAbs 660 680 700 Wavelength / nm 640 660 680 700 Wavelength / nm D1-His198Asn 2DAbs 640 660 680 700 Wavelength / nm D1-His198Ala 2DAbs 640 660 680 700 Wavelength / nm Stark 640 D1-His198Gln 2DAbs D1-Thr179His 2DAbs 640 660 680 700 Wavelength / nm D2-His197Gln 2DAbs 640 660 680 700 Wavelength / nm D2-His197Asn 2DAbs 640 660 680 700 Wavelength / nm D2-His197Ala 2DAbs 640 660 680 700 Wavelength / nm Figure 5Ǥ ȋʹȌ Synechocystis ȋfromlefttorightandfrom top to bottomȌǣ ǡ ͳǦͳͻͺ ǡ ͳǦͳͻͺǡ ͳǦͳͻͺǡ ͳǦͳͻǡ ʹǦͳͻ ǡ ʹǦͳͻ ʹǦͳͻ Ǥ ɖαͷͶǤǏ ʹǤʹͷͳͲͷ ǦͳǤ ͷͳͲǦͷȋȟȀǤǤȌǤ ͵Ǥʹͷ ͺͳǤͷ ͶͶǡͳͺǤʹͷǤ ȋͷȌ Ͳǡ Ǥͷ ͺʹǤͷ Ǣ ͳ ͺ Ǥ ͳǦ͵ȋǦ ȌǦ ʹ Ǧǡ ǡ Ǥǡ ʹ Ǥǡ ʹǦͳͻ ǡ ʹ ȋͷȌǤ Y ͳǤ 96 Table1.YǤ ɉ ȋȌ ͵Ǥʹͷ ͳǤͲͲ ͳǦͳͻͺ ͲǤͲͲ ʹǦͳͻ ɉ ȋȌ ɉ ȋȌ ͺͳǤͷ ͳǤͲͲ ͺǤʹͷ ͳǤͲͲ ͲǤʹʹ ͺͳǤʹͷ ͲǤͷ ͺͷǤͷ ͲǤ͵ ͳǤͷͲ ͲǤͷͳ ͺͲǤͷͲ ͲǤ͵ ͺͷǤͷͲ ͲǤͶͷ ͳǦͳͻͺ ͲǤͷͲ ͲǤ͵ͻ ͺͲǤͷͲ ͲǤͷͳ ͺͷǤͷ ͲǤͷ ʹǦͳͻ ʹǤͷͲ ͲǤͷ ͺǤͷ ͲǤͷ͵ ͺͷǤͷ ͲǤͷͳ ͳǦͳͻͺ ͳǤͲͲ ͲǤͶͶ ͺͳǤͷͲ ͲǤͶ ͺǤͷ ͲǤ ʹǦͳͻ ʹǤʹͷ ͲǤͷ͵ ͺͳǤͲͲ ͲǤͷʹ ͺͷǤʹͷ ͲǤ͵Ͷ ͳǦͳͻ ʹǤͷͲ ͲǤʹͻ ͺͶǤͲͲ ͲǤͲͻ ͺͻǤͲͲ ͲǤʹʹ Ǥ D1ǦHis198GlnandD2ǦHis197GlnmutantsǤǦ ȋͶȌǤ ͳ ͲǤͷ ͽΤΎΧǡ ǡ Ǥʹ ͲǤͷ ͳǤʹͷ Φ Χǡ ǡ Ǥ ͵ǤʹͷͲͳǤͷΥ Φ ͳʹǡ Ǥ ͻͷǤͷ ȋͶǤͷ Ȍ ͳͺ ȋͳǤͷ Ȍ ʹǦͳͻ Ǥ Ǥ ȋ10Ȍ Ǥ D1ǦHis198AsnandD2ǦHis197AsnmutantsǤǦ ȋͶȌǤ ͳ ͲǤͷ ͳǤʹͷ ǡ ǡΦ Ǥʹ ͲǤͷ ͵ Φ Ǥ ͵Ǥʹͷ ͲǤͷʹǤͷͽΤΎΦ ͳʹǡ Ǥ 97 ͷ D1ǦHis198Ala and D2ǦHis197Ala mutantsǤ ͳ ǡ Ǧ ͲǤͷ ͲǤʹͷ Χ Φǡ ǡ ȋ ͶȌǤ ʹ ͳ ͲǤͷ ͽΤΎΦǡ ǡ Ǥ ͵ǤʹͷͳǤͲʹǤʹͷͲǤͶͶ ͲǤͷ͵ ͳʹǡ Ǥ D1ǦThr179His mutantǤ ͳ ȋͶȌǣͺǤʹ͵ ʹǤͷΥǡͺͳǤͷ ʹǤʹͷ ͳȀͳͲ ͵Ǥʹͷ ͲǤͷ ͽΤΎ Ǥ ǡ ͵Ǥʹͷ ǡ ͲǤͷ Ȃ ͵Ǥʹͷ ȋͳȌǤ ǣ ͳʹͳ ͷ Ǥ ǡȋ Ȍ ͳ ʹ ͳǤ ȋ20, 23ȌǤ ǡ ͳʹͳ Ǥ Ǣ ǡ ȋ10ȌǤ ͳ ʹ ͵Ǥʹͷ ǣ ǡ ȋ ʹ ȌǤ Ǧ ǡ ǤǤǡ ȋͳʹͳȌȗ ͵ǤʹͷʹΪͳȋ Ȍ ȋ10Ȍ ȋͳɁǦʹɁΪͳȌȗǤ ǡ ȋͳɁǦʹɁΪͳȌȗ ͳ ǡ ȋͳɁǦʹɁΪͳȌȗ ĺ ʹΪͳ ĺ ͳΪͳ ĺͳΪͳȋ11Ȍǡ Ǧ Ǥ 98 ǡͺͳǤͷǡ ǣͳʹȋ ʹ Ȍ ȋ ͳ ʹ Ȍ Ǣͳ Ǥ Ǧ ǡ ͳ ʹ Ǥ ǡ ͳ ʹ ȋͳʹͳȌȗ ў ʹΪͳ ͵Ǥʹͷ ȋ ȋͳʹͳȌȗ ȌǤ ǡ ǦʹΪͳǤ ǡ ȋȌ ʹΪͳ Ǥ ͳ ʹ ͳ ʹ ʹΪͳ Ǥ ͵Ǥʹͷ ͳ ͳ ʹǤͳǦͳͻǡ ͳ ȋͳȀͳͲȌȋ͵Ǥʹͷ ȌǤ ͳ Ǧ ͳ Ǥ ǡ Ǧ ͳǦͳͻ ʹ Ǥ Ǥͷ ʹ ͺͶ ʹ ȋ ͷȌǤ Ȍ ͳ ȋ ǤͷȌȌͺͶ ȋʹΪͳȌɁȗ ȋ ȌǤ ͺͶ ʹ ȋ Ȍ ͳ ȋʹΪͳȌɁȗǤ 99 ͷ ǡ ͺͳǤͷ Ǥ ǡ ȋͳɁΪͳɁǦȌȗ ȋ ȋͳͳȌȗ ͳΪͳ Ȍ ͺͳǤͷ ȋγ ͺͳ ȌǤ ǡ ȋʹΪͳȌɁȗ ȋ ʹΪͳ ȋͳʹͳȌȗ Ȍ ͺͳǤͷ ȋγͺͶȌǤǡ ȋͳɁΪͳɁǦȌȗ ͳ ȋ11Ȍǡ Ǥǡ ȋʹΪͳȌɁȗ ͳȋ10ȌǤ ǡ Ǧǡ Ǥ ǣ ͳǣȋͳɁǦʹɁΪͳȌȗ͵ĺʹΪͳĺͳΪͳĺͳΪͳ ͳǣȋͳɁΪͳɁǦȌȗͺͳĺͳΪͳĺͳΪͳ ͳǣȋʹΪͳȌɁȗͺͶĺʹΪͳĺͳΪͳĺͳΪͳ Ǥ ȋ ǦǡȌ ȋ42ȌǤ ͷ ȋ43ȌǤ ǡ ǡ ǡǦ ǡ Ǧ Ǥ Ǧ ǡ ǡ Ǧ Ǥ 100 ǡ ǡͺͲǤȋͺͲ ǦͳǡͲǤͻͳȌ ͺ͵ǤȋͲ ǦͳǡȌȋ42ȌǤ ȋͳɁΪͳɁǦȌȗͺͳ ȋʹΪͳȌɁȗͺͶ ǡ ǡ Ǥ ͺͲǤ Ǧ ȋͳɁΪͳɁǦȌȗͺͳ Ǥ ͺ͵Ǥ Ǧ ȋʹΪͳȌɁȗͺͶ ȋ ȋͳʹͳȌȗ ȌǤ ThePheophytinQXabsorptionband AbsorptionandStarkǤXȋȌͷͶͲǤͶ ǡǡ Ǥ Absorption / a.u. 0,08 0,06 0,04 Stark 530 3x10 -5 2x10 -5 1x10 -5 540 550 Wavelength / nm 560 530 540 550 Wavelength / nm 560 530 540 550 Wavelength / nm 560 WT D1-His198Glu WT D1-His198Gln WT D1-His198Ala D2-His197Glu D2-His197Gln D2-His197Ala 530 540 550 Wavelength / nm 560 WT D1-Thr179His 0 530 540 550 Wavelength / nm 560 530 540 550 Wavelength / nm 560 530 540 550 Wavelength / nm 560 530 540 550 Wavelength / nm 560 Figure 6Ǥ ȋupper panelsȌ ȋlowerpanelsȌSynechocystis X ȋfrom left to rightȌǣ ǡ ͳǦͳͻͺ ʹǦͳͻ Ǣ ǡ ͳǦͳͻͺ ʹǦͳͻǢǡͳǦͳͻͺʹǦͳͻǢ ͳǦͳͻ Ǥ ͶͷȂͳͲǤ ɖαͷͶǤǏ ʹǤʹͷͳͲͷ ǦͳǤ 101 ͷ X ǣ Ȍ ǡ ͳǢ Ȍ ǡȟɊαʹǢ Ȍ ȋ16ȌǤ ǡSynǤ ǡǡ XȋȌȟɊǡǤǤǡ ǡ ǡ ͳǤ ǡ SynǤ Ǥ ǡ ͳ X ȋ ʹȌǤ ǡ ͳǦ ͳͻͺ ʹǦͳͻǡ ȋ ȌǤǦ ǣͲǤͶȋȌǡͳ ȋʹǦͳͻ ͳǦͳͻȌ ͳǤǦͳǤ ȋͳǦ ͳͻͺͳǦͳͻͺȌǤʹǦͳͻ ͲǤ ǡ ȋ Ȍǡ Ǥ Table2.XǤ ɉȀ Ȁ Ȁ ͷͶͲǤͶ ͷͶͲǤͺ ΪͲǤͶ ͻǤʹ ͵ǤͲ ͷ Ǥͷ ͳǦͳͻͺ ͷͶͳǤͲ ͷͶͳǤͲ ͲǤͲ ͺǤ ʹǤͶ ͶǤͳ ʹǦͳͻ ͷͶͳǤͲ ͷͶͳǤ ΪͲǤ Ȇ ͳǤ Ȇ ʹǤ͵ ͳǦͳͻͺ ͷͶͳǤͺ ͷͶ͵Ǥͷ ΪͳǤ ͻǤ ͷǤͻ Ͷ Ǥͺ ʹǦͳͻ ͷͶͲǤͷ ͷͶͳǤͷ ΪͳǤͲ ͺǤͺ ͵Ǥ ͷ ͳͳǤ ͳǦͳͻͺ ͷͶͲǤͻ ͷͶʹǤͷ ΪͳǤ Ǥͺ ͶǤͲ Ͷ ͶǤͻ ʹǦͳͻ ͷͶͳǤͺ ͷͶͳǤͺ ͲǤͲ ǤͲ Ǥͷ ͷ ͳͳǤ ͳǦͳͻ ͷͶͲǤͲ ͷͶͳǤͲ ΪͳǤͲ ͺǤʹ ʹǤͺ Ͷ ʹǤͲ ǣͳͲǦ͵ͳͲǦǡ Ǥ 102 ǡ ͳ X ͳǡ ʹ ͳ ͳǤ Ȍ Ȍ ȋǡ ǡ ǡ ȌǤ ǡ ȋ11, 23, 36Ȍ Ȍ ͳǦͳͻ ͳ ͳ ͳͳ Ȍ ͳ ʹ ͳǤǡͺͳǤͷ ͳ ͳǡ ȋͳͳȌȗ ǡ ͳΪͳǡ ǤǤǡ ȋͳɁΪͳɁǦȌȗͺͳǤ CONCLUSIONS Ǧ Ǧ ǡ Ǥ ǡǡ ȋ ǡ ȌǤ Ǧ ȋͳɁǦʹɁΪͳȌȗ͵ȋͳɁΪͳɁǦȌȗͺͳȋ ȌǤ ǡ ʹΪͳ ȋʹΪͳȌɁȗͺͶ Ǧ Ǥ Ǧ Ǧ Ǥ 103 ͷ APPENDIX 650 660 670 680 690 700 525 535 545 555 565 Absorption / a.u. 0,02 spinach PSII RC CP43 CP47 0,3 spinach PSII RC CP43 CP47 0,01 0,0 0,00 -4 Stark 1x10 -5 1x10 0 -4 -1x10 0 spinach PSII RC CP43 CP47 CP43 + CP47 650 660 670 680 690 Wavelength / nm -5 -1x10 700 spinach PSII RC CP43 CP47 CP43 + CP47 525 535 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Acta 1554ǡ ͳͺͲǦͳͻͳǤ 107 ͷ ͵͵Ǥ Ú ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥ ȋͳͻͺȌ Rhodobacter sphaeroides Ǧʹ RhodopseudomonasviridisǡProc.Natl.Acad.Sci.U.S.A.84ǡͷ͵ǦͷͶͳǤ ͵ͶǤ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥ ȋͳͻͺͺȌ Rhodobacter sphaeroides Rhodopseudomonas viridis ǡ Proc.Natl.Acad.Sci.U.S.A.85ǡͳͲǦͳͳͳǤ ͵ͷǤ ǡǤǤǡǡǤǡǡǤǡǡǤǤǡǡǤ Ǥȋͳͻͻ͵Ȍ ȋ Ȍ ͳǤͷ ǣ Ǧ ǡBiochim.Biophys.Acta1143ǡʹʹ͵Ǧʹ͵ͶǤ ͵Ǥ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥ ȋʹͲͲͺȌ ǣǡBiophys.J.95ǡͳͲͷǦͳͳͻǤ ͵Ǥ ǡ Ǥ Ǥǡ ǡ Ǥ ȋʹͲͲͲȌ ǡPhotosynth.Res.63ǡͳͻͷǦʹͲͺǤ ͵ͺǤ ǡ Ǥǡ ǡ Ǥ ȋͳͻͺȌ Ǧͳ Ǧʹ Ǧͷͷͻǡ Proc.Natl.Acad.Sci.U.S.A.84ǡͳͲͻǦͳͳʹǤ ͵ͻǤ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥ ȋͳͻͺͻȌ bǦ559 ǡFEBSLett.254ǡͳͷͲǦͳͷͶǤ ͶͲǤ ǡǤǤǡǡǤǤ ǤǡǡǤǤǤǡǡǤǤǡ ǡ Ǥ ȋͳͻͻͷȌ Ͷ ǡBiophys.J. 68ǡʹͺͳǦʹͻͲǤ ͶͳǤ ǡ ǤǦǤǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡǤǤ ǤǡǡǤǤǤǡ ǡǤǡǡǤǤ ȋͳͻͻͻȌ Ͷ͵ ǡBiophys.J.77ǡ͵͵ʹͺǦ͵͵ͶͲǤ ͶʹǤ ǡǤǤ ǤǡǡǤǡ ǡǤǡǡǤǤ ȋͳͻͻͺȌ ǣ Ǧ ǡProc.Natl.Acad.Sci.U.S.A.95ǡͳʹͺǦͳ͵͵Ǥ Ͷ͵Ǥ ǡǤǤǤǡ ǡǤǡ ǡǤǡǡǤǤȋͳͻͻͶȌǦ ǤͳǤ ǦǦ ǣ ǦͺͲǡJ.Phys.Chem.98ǡͲʹǦͳͳǤ 108 CHAPTER6 PigmentǦProteinInteractionsforthe SitesofCation(P680)and Anion(PheD1)Localizationinthe PhotosystemIIReactionCenter StudiedbyLightǦInduced FourierTransformInfrared(FTIR) DifferenceSpectroscopy ǡǡǤǡǤ Ǧ ȋȌ ȋȌ Ǥ Ǧ ȋͺͲȌ ȋͳȌ ȋ Ȍ Ǥ ǡ Ǧ ͺͲΪȀͺͲͳȀͳ Ȍ ͳͷ Ȍ a a ȋ Ȍ ȋȌ Ǥ ǡ Ǧ ͺͲΪȀͺͲ ȋ ǡ Ȍ ͺͲ intactness Ǥ ǡ ͳ Ǧ ͳȀͳ Ǧ ͳǦͳ͵ͲǤ Ǧ Ǥ Manuscriptinpreparation INTRODUCTION ȋȌǦ ǡ Ǥ Ǧ ȋȌ ȋȌ ȋ1ȌǤ ǡ ȋ2ȌǤ Ǥ Ǥ aȋȌǡaȋȌǡ ȾǦ Ǥ ȋͳǡ ʹǡ ͳ ʹȌ ȋͳʹȌ ȋͳʹȌ ǤȋͳʹȌ Ǥ ȾǦ ȋͳ ʹȌ ȋ3Ǧ5ȌǤ ͳ ȋ6ȌǤ Ǥ ȋ7Ǧ20Ȍ Ͷ͵Ͷȋ19,21Ǧ 23ȌǤ ȋ24Ǧ28ȌǤ ǡ ͺͲΪͳ Ǥ ǡ ͺͲͳǡ Ǥ ǡ Ǥ Ǥ ȋ20ȌǤǦ ǡ ǡ Ǧ Ǥ ȋ29ȌǤ 112 Ǧ ȋ30ȌǤ ȋ31ȌǤ Ǧ Ǥ Ǧ ȋȌ ȋ32ȌǤ ȋαȌ ͳͺͲͲǦͳͲͲ Ǧͳ Ǧ ȋ33, 34Ȍ Ǧ Ǥ ȋǦǦȌ ͺͲΪ ͳLJǤ ǦǦ Ǧ ȋͺͲΪȌ ȋͳȌǤ ǡ Ǥ ȋͺͲΪȀͺͲͳȀͳȌ ͺͲΪ ͳǤ ǡ Ǧ Ǧ Ǥ ȋͺͲΪȌȋͳȌǤ ǡ Ǧ Ǥ Ǥ Ǥ ǡ ǡͺͲΪ ͳ ǡ Ǧ ȋͺͲΪȀͺͲ ͳȀͳȌ ȋͳͶȌ ͳͷǤ ͳͷǡ Ǥ ͳͷ ͳͶǡ ȋɋȌ ͳͷ ɋαͳȀʹɎȋFȀɊȌͳȀʹȋF Ɋ ȌǤ 113 ǡ ȋα Ǧ ǡ ͳͺͲͲǦͳͷͻͲ ǦͳȌ ȋǦ ǡ Ǧ ǡ Ǥ ͳͷͷͲ ǦͳȌ ȋ32Ȍ ͳͷ ͳǦ͵ Ǧͳ γͳͷ Ǧͳǡ ȋ35ȌǤ ͺͲ ͳ ǡ ǡ ǡ ȀǦ͵ͳ ͳͶ ͳͷ Ǥ ǡ ǡ Ǧ ǦǤ ǡ ͺͲǡ ͳͳͲͲǦͳ͵ͲͲȋ36Ǧ38Ȍ ȋ ΪͺʹͲ ȋ39ȌȌǤ ȋ37Ȍ ͺͲ a ȋ Ϊͺ͵Ͳ Ȍ ȋ40Ȍ ͳǦʹ ǡǤǤǡͺͲ Ǥ Ǧ ͺͲΪȀͺͲ ȋ41Ǧ45ȌǤ ǡ ͺͲΪ Ǥ ͳ͵ͳǦ ͳʹ ͺͲΪǡ ǡ Ǧ ͺͲΪǤ ͺͲ Ȃ ȋȌ ǡ Ǧ ͺͲΪȀͺͲ ȋ45ȌǤ ͺͲΪ Ǥ ͺͲΪ ͳʹ ǡ ȋͲǦͺͲ ΨȌ Ǥ ǡ ͺͲǡ ǡ ǡǤ 114 Ǧ Ǧǡ Ǧ ͺͲΪȀͺͲ Ǥ ǡ ͳǡ Ǧ ͳǦͳ͵Ͳ Ǧ ǦȋȌǤ ͳǦͳ͵Ͳ ͳ͵ͳǦ ͳ ȋ46Ȍ ȋ47ȌǤ ͳ͵ͳǦ ͳǡ ɎǦ ǡ ȋ48Ȍǡ ǡ Ǥ Ǧ ͳȀͳ Ǧ Ǧ ǡ Ǥ ǡ Ǧ ȋͺͲΪȌ ȋͳȌ Ǧ Ǥ ȋͺͲΪȌ ǤȋͳȌ Ǧ Ǥ Ǧ Ǥ 115 116 Ǧ MATERIALSANDMETHODS SamplepreparationǤ ȋ49,50ȌͳͲͲ ͵Ͳ ρ Ͳ Ͳ γͷ ȋ51ȌǤ SynechocystisǤ ͺͲ͵ ȋ6, 50ȌǤ Ǧ ǤͲ ͷͲ ǡ ʹͲ ʹǡ ͷ ʹǡ ͳͲ Ͷǡ ͲǤͶ ͳͲͲρͳ ͳͲ ͳʹͲͲͲͲ Ǥ ʹǤ Ǥͷ ʹͲ ͲǤͲ Ψ ȾǦǤ ͵ͲρͷρͷͲǡʹ ʹ ʹ Ǥ Synechocystis Ǥ ͺͲ͵ ǤͲ ͷͲ ǡ ʹͲ ʹǡ ͷ ʹ ͲǤͲ͵ΨȾǦʹǤͳͲρͷρ ͷͲ ʹ Ǥ ʹ Ǥ ȋ52Ȍ Ǥͷ ʹͲͲǤͲΨȾǦǤ SynechocystisǤͺͲ͵ ȋ48Ȍ Ǥͷ ʹͲ ͲǤͲ Ψ ȾǦǤ Ǧ ͺͲΪȀͺͲ Ǥ ͳͲρ ͷρͷͲǡ ͳͲρ ͳ ρ ͷͲͲ ͲǤͳʹ ρ ͷͲ ʹ ʹ Ǥ ʹͷͲ Synechocystisʹ͵Ͳ ǤǦ ͳLJȀͳ ͳͶ ͳͷ ȋͳͲͲʹͲȌʹͲǤͺρ ͷρ Ǥ LightǦinduced FTIR difference spectroscopyǤ ͲͺͲ ʹ Ǥ γͻͲͲͲͲ ȋ͵ͲȌǤ Ͷ ǦͳǤ 117 RESULTSANDDISCUSSION Quantum chemical calculations: Chl and Phe band shifts upon global 15Nisotopelabelling a ȋ aȌ aȋ aȌ ͳͶ ͳͷ ǡ ͵ ȋ53Ǧ56Ȍ Ǧ͵ͳ Ǥ ͻͺ ȋ57ȌǤ ͳ ʹ ȋ α Ȍ a aΪ a aǡ ǡ ͳͶ ͳͷ Ǥ ͳ͵ͳǦ ͳ͵ʹǦ ǡ aǡ Ǥ ǡ ǡ ͳ͵ͳǦ ͳ͵ʹǦ ǡ ȋ46Ȍ ȋ47ȌǤ ǡ Ǥ ǡ Ǥ ǡ ǡ ͳ͵ ͳǦ ͳ͵ʹǦ ǡ ǡ ǡ ͳͳͲͲ Ǧͳǡ Ǥ Ǥ ͲǤͻǡ ǡ ȋ47ȌǤ 118 Ǧ Table1Ǥ ȋ ǦͳȌaaΪ ͳͶͳͷȋȌǤ Chlorophyll ͳͶ ͳͶȋͳ͵ͳǦȌ ͳͷͲȋͳ͵ʹǦȌ ͳ͵ʹ ͳͲʹ ͳͷͶͻ ͳͶͲ ͳ͵ͺ͵ ͳ͵ͳ͵ ͳʹͺ ͳͲʹͲ ͳͲͲͺ ͳͲͲͳ ͻͺͲ ͻ ͳͷ ͳ͵ ͳͷͲ ͳ͵ʹ ͳͲʹ ͳͷͶͻ ͳͶͲ ͳ͵ͺͳ ͳ͵Ͳͻ ͳʹͺͷ ͳͲͲͻ ͻͻ ͻͺ ͻ͵ ͻͻ ͳ Ͳ Ͳ Ͳ Ͳ Ͳ ʹ Ͷ ʹ ͳͳ ͳʹ ͳͶ ͺ Chlorophyll+ ͳͶ ͳͺͺȋͳ͵ͳǦȌ ͳͶȋͳ͵ʹǦȌ ͳͷͷ ͳͷͷʹ ͳͶͲ ͳͶʹͲ ͳ͵ͻ ͳʹͻͺ ͳͳͺʹ ͻͺͳ ͻͳ ͳͷ ͳͺͺ ͳͶ ͳͷͷ ͳͷͷͳ ͳͶͲ ͳͶͳ ͳ͵ͻͶ ͳʹͻͶ ͳͳͺͲ ͻͶ ͻʹ Ͳ Ͳ ͳ ͳ Ͳ ͵ ͵ Ͷ ʹ ͻ ͲǤͻ Table2Ǥ ȋ ǦͳȌaa ͳͶͳͷȋȌǤ Pheophytin ͳͶ ͳȋͳ͵ͳǦȌ ͳͷͷȋͳ͵ʹǦȌ ͳͷͶͻ ͳͷͶ͵ ͳͶ ͳ͵ͻ ͳʹͻ͵ ͳʹͳͶ ͳͳͶͺ ͳͲͷͺ ͻͺͺ ͻ͵ͻ ͳͷ ͳ ͳͷͷ ͳͷͶ ͳͷ͵ͺ ͳͶͶ ͳ͵ ͳʹͻʹ ͳʹͲͻ ͳͳͶ ͳͲͷͷ ͻͺͷ ͻ͵ͳ Ͳ Ͳ ͵ ͷ ͵ ʹ ͳ ͷ ͳ ͵ ͵ ͺ Pheophytin ͳͶ ͳ͵ͺȋͳ͵ͳǦȌ ͳʹͻȋͳ͵ʹǦΪȌ ͳʹͶ ͳͷ ͳͶͺ ͳͶ͵ͷ ͳ͵ͷ͵ ͳ͵ͳͺ ͳͳʹ͵ ͻͷͳ ͻͶ ͳͷ ͳ͵ ͳʹͻ ͳʹ͵ ͳͷʹ ͳͶͺͶ ͳͶ͵Ͷ ͳ͵ͷͲ ͳ͵ͳ͵ ͳͳͳͻ ͻͶ ͻ͵ͺ ͳ Ͳ ͳ ͷ ʹ ͳ ͵ ͷ Ͷ ͺ ͲǤͻ 119 Effectof 15NisotopelabellingontheFTIRabsorptionandlightǦinduced FTIRdifferencespectra ȋͳͶȌ ͳͷ Ǧ ͺͲΪȀͺͲ ͳȀͳ ͳ ʹǡ Ǥ ͳͷ ȋα Ǧ Ȍǡ ͳͺͲͲǦͳͷͻͲ Ǧͳ ǡ ͳ Ǧͳ Ǧ ǡȋǦ Ǧ Ȍǡ ͳͷͺͲǦͳͶͺͷ Ǧͳ ǡ ͳͶ Ǧͳǡȋ35ȌǤ Ǧ ǡ ǡ ȋ ǡ ͳ ʹȌ ȋȌǤ Effect of 15N isotope labelling on the lightǦinduced P680+/P680 FTIR differencespectrum ͳ Ǧ ͺͲΪȀͺͲ ͳͷǦͳʹͲͲ Ǧͳ ʹ͵Ͳ ͳͷ Ǥ ʹ͵Ͳ ȋ41ȌǤ ͳͷ Ǧ ȋͳͶ ͳͷǡ ͳȌ Ǧ ǦǤ 1750–1650cmǦ1region. ǡαǡ Ǥ ȋͳȌǡ Ǥ ͳʹͶǡͳͳͲǡͳ ǦͳͳͲʹǡ ͳͺͲǡͳͷʹ Ǧͳͳ͵ͳǦαͺͲ ǡ ȋ41ȌǤ ǡ ͳͳͲȋΪȌͳͲʹȋǦȌ Ǧͳǡͳ Ǧͳͳͷ Ǥ ͳͲͷ Ǧͳ Ǧ Ǥ ͺͲ Ǥ 120 Ǧ + -1286 1279 1344 - 1491 1524 1553 1652 1702 - 1680 - - - N 1298 -1302 -1292 -1505 -1540 15 1280 1279 Double-difference Abs ''Abs -1584 N 1300 -1667 -1645 14 -1724 -1710 'Abs P680 /P680 1800 14 Abs N 1700 1600 1500 1400 1300 15 Abs N 1200 -1 Wavenumber / cm Figure 1Ǥ Ǧ ͺͲΪȀͺͲ ʹ͵Ͳ ǣ ȋsolid black lineȌ ͳͷ ȋsolid grey lineȌǤ Ǧ ǡȋͳͶȌ ͳͷȋdottedlineȌǤ ʹ͵Ͳ ǣ ȋdashed black lineȌ ͳͷ ȋdashed grey lineȌǤͻͲͲͲͲǤ άͳ ǦͳǤ Ͷ ǦͳǤ ͳͷǦͳͶͲ Ǧͳ ͳ Ǧͳ ͳͷʹȋǦȌͳͶͷȋΪȌ Ǧͳ ͺͲǤ 1650–1350cmǦ1region.ͳ͵ͲͳͲͲ Ǧͳγʹ Ǧͳ ͺͲΪǤ ͳͷͺͲǦͳͶͺͲ ǦͳȋȌǡͳͷ Ǧͳ Ǥ Ǧ Ǥ ͳͷͺͶ Ǧͳ ǡ ǡ ǦͳǤ ͳͷ͵ȋǦȌǡ ͳͷͷ͵ȋǦȌǡ ͳͷͶͲȋΪȌǡ ͳͷʹͶȋǦȌǡ ͳͷͲͷȋΪȌ ͳͶͻͳȋǦȌ Ǧͳ ͳ͵ǡ ͳʹǡ ͳͷǡ ͺǡ ͵ Ǧͳǡ ǡ Ǥ ͳͶͺͲ ͳ͵ͻͲ Ǧͳ ǤͳͶͺͲͳ͵ͷͲ Ǥ 121 1350–1200cmǦ1region. ͳ͵ͶͶ Ǧͳ ͳ͵ͶͲ Ǧͳ ǡ ͳ͵ͶȋǦȌȀͳ͵͵ͺȋΪȌ Ǧͳǡ Ǧ Ǥ Ǥ ͳ͵ͳͲǦͳʹͷ Ǧͳ Ǥ ȋͳ͵ͲͲ ǦͳȌ ȋͳʹͺͳʹͺͲ ǦͳȌǤ ȋͳʹͻͺ ͳʹͻʹ ǦͳȌ ȋͳʹͻ ǦͳȌǤ ǡǡ ȋ ͳ͵Ͳʹ ǦͳȌ ͳʹͻʹ Ǧͳ ͳʹͺ Ǧͳͳʹͻ Ǧͳ ǦͳͲ Ǧͳ Ǥ ǡ ͳ͵ͲͲ Ǧͳͳʹͻͺ Ǧͳ ͳʹͺͲ Ǧͳ ͳʹͻ Ǧͳ ͳǦʹ Ǧͳ Ǥ ȋ ͳȌǡ ʹǦͶ Ǧͳ ͳ͵ͲͲ ͳʹͺͲ Ǧͳǡ Ǥ ǡ ǡ ȋ ͳ͵Ͳʹ ͳʹͺ Ǧͳǡ Ȍ ȋ ͳ͵ͲͲͳʹͺͲ Ǧͳǡ Ȍ Ǥ Effect of 15N isotope labelling on the lightǦinduced PheD1/PheD1 FTIR differencespectrum ʹǦ ͳȀͳ ͳͷͲǦͳͳͷͲ Ǧͳ ʹ͵Ͳ ͳͷ ǡ Ǧ ȋͳͶ ͳͷȌǤ ǡ ʹͶͲ ǡ ͳͺͲͲǦͳ͵ͷͲ Ǧͳ ȋ46ȌǤ 1750–1600cmǦ1region. ǡαǡ Ǥ ǡ ͳͶͲ Ǧͳͳ͵Ͳ ǦͳȋͳͶͲȋǦȌȀͳ͵ͲȋΪȌȌǡ ͳ͵ʹǦαͳǡ ǡ ȋǦ ȌǤ ȋʹȌ ͳ ȋʹȌǤ 122 Ǧ - -1586 - 1677 - 1680 1740 Double-difference Abs ''Abs 1543 1529 1657 N 1622 1606 - -1615 - -1663 -1649 -1631 - 15 1640 N -1730 -1702 14 - 'Abs PheD1 /PheD1 1800 14 Abs N 1700 1600 1500 1400 1300 15 Abs N 1200 -1 Wavenumber / cm Figure2ǤǦ ͳLJȀͳ ʹͲǣȋsolidblacklineȌ ͳͷȋsolidgreylineȌǤǦ ǡȋͳͶȌ ͳͷȋdottedlineȌǤ ʹ͵Ͳ ǣ ȋdashed black lineȌ ͳͷ ȋdashed grey line)ǤͻͲͲͲͲǤ άͳ ǦͳǤ Ͷ ǦͳǤ ͳʹʹȋǦȌȀͳͲʹȋΪȌ Ǧͳ ͳ͵ʹǦ α ͳ ǡ ȋ Ǧ Ȍ ͳͷ ǡ ȋ ʹȌǤ ͳȋǦȌȀͳͷͺȋΪȌ Ǧͳͳͳ͵ͳǦαȋ46,47Ȍǡ ʹ Ǧͳ Ǥ ͳ͵ͳǦ α ǡ ͳ͵ͳǦ α Ǥ ʹ Ǧͳ ͳͲͲǦͳͷͲ Ǧͳ Ǥ ͳ͵ȋΪȌǡ ͳͷȋǦȌǡ ͳͶͻȋΪȌǡ ͳͶͲȋǦȌ Ǧͳ ͳ Ǧͳ ͳ͵ͳȋΪȌǡͳʹʹȋǦȌǡͳͳͷȋΪȌǡͳͲȋǦȌ Ǧͳ ʹ ǦͳǤ ͳͲǦ ͳͲͲ Ǧͳ ͳLJ Ǥ 123 1600 – 1150 cmǦ1 region. ǡ ǡ Ǥ ͳͷͶ͵ Ǧͳ ͳͶ Ǧͳ ͳͷ Ǧ ͳͷͷͷȋǦȌȀͳͷͶͲȋΪȌ ǦͳǤ ͳͷͲͲǦͳͳͷͲ Ǧͳ ʹȂͷ ǦͳǤ ͳǤ Comparison of the lightǦinduced P680+/P680 FTIR difference spectra ofPSIIpreparationswithvariableantennasize ͵ Ǧ ͺͲΪȀͺͲ ȋʹͷͲȌǡ ȋʹ͵ͲȌ ǤͺͲΪȀͺͲ ͷͲǤ ȋ45Ȍǡ ǡ Ǥ Ǥ ǡ ͳ͵ͳͲ Ǧͳ ͺͲΪ ͳʹ Ǧͳ Ǥ ͵ǡ ͳ͵Ͳͺ ǦͳǤ ǡͳ͵ͲͲͳ͵ͳʹ Ǧͳǡ ͳ͵ͲͲ Ǧͳ ǡ ͳ͵ͳʹ Ǧͳ Ǥ Ǥ ǡ Ǥ ͳͶvs ͳͷȋͳȌǡ ͳ͵ͳͲǦͳʹͷ Ǧͳ Ǥ ͺͲΪͳͳͲǦͳͺͲ Ǧͳͳ͵ͳǦα Ǥ ͵ ͳͲͳ Ǧͳ ǡ ȋ41,43Ȍǡͳ͵ͳǦαͺͲǤ ͳ ʹ ͳ͵ͳǦ ǡ Ǥ ǡͺͲǡͳ͵ͳǦα ǡǡ ǡ ͳʹͶͳͳͲ ǦͳǤ 124 Ǧ 1600 1169 1400 1140 1167 1178 1141 1180 1163 1285 1314 1300 1314 1300 1344 1500 1344 1525 1553 Reaction Center 1630 1610 1654 1681 1701 1700 1181 1285 1345 1537 1556 1553 1630 1610 1533 Core 1663 1653 1676 1701 1724 1711 1743 1737 1800 1308 1650 1630 1680 1663 1710 1701 1725 BBY 1735 'Abs 1742 1733 1740 1724 1709 1300 1200 1100 -1 Wavenumber / cm ΪȀ Figure3ǤǦ ͺͲ ͺͲ ʹ͵ͲǣȋtoplineȌǡ ȋmiddlelineȌ ȋbottom lineȌǤ ά ͳ ǦͳǤ Ͷ ǦͳǤ ȋ45Ȍǡ ͳͳʹ Ǧͳ ǡ ȋͳʹȌ ͺͲΪ Ǥ ͵ ǡ ȋ45ȌǤ Ͷ Ǧ ͺͲΪȀͺͲ ʹ͵ͲȌ Ȍ ǡ ȋ45ȌǤ Ͷǡ ǡ ǡ Ǥ 125 ΪȀ Figure 4Ǥ Ǧ ͺͲ ͺͲ ǣ ȋtop lineȌ ȋbottomlineȌǤ Ͷ ǦͳǤ ǡͳʹͶͳͲͻ Ǧͳǡ ͳ͵ͳǦαͺͲǡ Ǥǡ ǡ ͺͲΪȀͺͲ Synechocystis ʹͷͲ ʹ͵Ͳ ǡ ǡ ȋͷȌǤ ǡ Ǥ ͳ͵ͳǦ α ǡ ǡ ǡ ͳͻ ͳͺͳ Ǧͳͳ͵ͳǦαǡ ͳ ʹ Ǥ 126 Ǧ 1140 1167 1165 1176 1400 Wavenumber / cm 1154 1298 1344 1328 1552 1600 1286 1506 1490 Reaction center 1140 1179 1287 1344 1328 1156 1490 1553 1610 1610 1628 1652 1696 1681 1800 Core 1629 1670 1652 1709 1681 1699 1736 1742 1723 'Abs b 1308 1507 1744 1736 a 1670 1709 1725 1200 -1 ΪȀ Figure 5Ǥ Ǧ ͺͲ ͺͲ Synechocystis ʹͷͲȋtoplineȌʹ͵ͲȋbottomlineȌ Ǥ άͳ ǦͳǤ Ͷ ǦͳǤ ConclusionsǤ ͺͲΪ Ǥ 127 Eff E ffeecct of of sit s teeǦd diirreecteed d m mu utta atiio on na att possiittio on n D1ǦG ǦGlln130 30o on n th he e liig gh httǦiindu duceed d PheeD1 Ph /Ph heeD1 FTIR R d diffffere en ncceessp pe ecctrra a of of Syn Syneecch ho occy ysstiis re rea acttiioncceen nteerrssa an nd d D /P D FT com co mp pa arriiso on nw wiith hsp pin na acch h Ǧ ȋ3 3ǦǦ5 5Ȍ ȋ ȋ Ȍ ȋ Ȍ ͳǦͳ͵Ͳ ͳ͵ ͳ͵ͳǦ ͳͳǤ ȋ Ȍ ͳǦ ͳ͵Ͳ ȋ ȌȌ ͳǦ ͳ ͳ͵ ͵Ͳ Ͳ Ǥ ͳǦͳ ͳ͵ ͵Ͳ Ͳ ͳ ͳ͵ ͳ͵ Ǧ ͳǣ ǣ Ǧ Ǧ Ǧ ȋȋ ȌȌǤ ͳǦǦͳ ͳ͵ ͵Ͳ Ͳ Sy Syn nǤ ͳǦ ͳ ͳ͵ ͵Ͳ Ͳ Dz ǦǦ dz Ǥ Fi Figu urre e6 6ǤǤ ͳ͵ ͵ͳǦ ͳ ͳ͵ ͵ʹǦ Ǧ ͳ ͳǦͳ Ǧ ͵Ͳ ͳǦͳ ͳʹ ʹ ȋ ȋ5 ȋ5ȌȌȌǤ ȋ ȋ Ȍ Ǥ ǣ ͳ ȋ ȋ Ȍǡ ȋȌȌǡ ȋ ȋ ȌȌ ȋ ȋ ȌǤǤ % %Ǥ ǦǦ ͳ Ȁ ͳ ͳ Ȁ ȋ ȋ Ȍ ȋ ȌȌ ȋȋSy Syn neecch ho ocyyssttiss Ǥ ͺ ͺͲ Ͳ͵ ͵ȋSSyyn n.ȌȌȌǣǣ ǡͳǦ ͳ͵Ͳ ͳǦ ͳ ͳ͵ ͵Ͳ Ͳ ʹ ʹͶ ͶͲ Ͳ Ǥ ͳ ͳͳ Ǥ ͳ ͳͷ ͷͲ ͲǦͳ ͳ Ͳ ͲͲ Ͳ Ǧͳͳ ǡ ͳ͵ʹǦ Ǧ ͳ ǡ ȋȋ ȌȌǤ ͳ͵ͻ Ǧͳ 12 1 28 8 Ǧ -1730 -1586 1739 1630 1678 - 1723 Synechocystis D1-Gln130Leu 1750 1679 1738 1729 - -1733 - 1739 Synechocystis D1-Gln130Glu Synechocystis WT D1-Gln130 -1732 ' - 1721 - 1603 1677 -1730 1739 - 1722 - 1587 spinach D1-Glu130 1700 1650 1600 -1 1550 1500 Wavenumber / cm Figure7ǤǦ ͳLJȀͳ ʹͶͲ ȋͳǦ ͳ͵ͲȌ ȋgreenȌ Synechocystisǣ ͳǦ ͳ͵Ͳ ȋredȌǡ ȋͳǦ ͳ͵ͲȌ ȋblackȌ ͳǦ ͳ͵Ͳ ȋblueȌǤ άͳ ǦͳǤ Ͷ ǦͳǤ Ǥ ȋȌǡ ͳǦͳ͵Ͳ ȋ46ȌǤ ǡ ͳ͵ͻ Ǧͳ SynǤ ͳǦ ͳ͵Ͳ ȋ ǡ ǡ Ȍ ͳǦͳ͵ͲǤ 129 ͳ͵ͻ Ǧͳȋaȋ46ȌȌͳ ͳǦͳ͵Ͳǣͷ ǦͳͳǦ ͳ͵Ͳǡ Ǧͳ ͳͲ ǦͳͳǦ ͳ͵Ͳ ǡ ͳǦͳ͵Ͳ ͳ ͳ͵ʹǦ α Ǥ Ǧ a ȋ aȌǡ aȀ aǡ ȋ ͳ͵ʹǦ Ȍ Ǧ ȋȌ ͳͶ͵ Ǧͳ a ǡ ͳͶ͵ Ǧͳ Ǧ ͳ͵ʹǦ α a ȋ46ȌǤ ͳ͵ͻ Ǧͳ ȋǦ Ȍ ͳ͵ʹǦ α ͳ ȋ Ͷ Ǧͳ ͳ a ȌǤ ͳͷͲǦͳͲͲ Ǧͳͳʹ͵ ǦͳǤ ǡͳ͵ʹǦα ͳ͵ͻ Ǧͳǡ Ǧ ͳ͵ʹǦ αǤ ǡ ͳʹ ȋͳʹȌǡ Ȃ ǡ Ǧ ȋʹǤͷͺ %Ȍ ͳ͵ʹǦ α ȋ5Ȍǡ ͳʹ Ǧ ͳ͵ʹǦ αǤ ǡ ͳʹ͵ ǦͳͳǦͳ͵Ͳǣ ͳʹͻ Ǧͳ ͳǦ ͳ͵Ͳ ͳʹͳ ȋͳʹʹȌ Ǧͳ ͳǦ ͳ͵Ͳ ȋ ȌǤ ǦͳǦ ͳ͵ʹǦαͳǦͳ͵Ͳȋ ǦȌ ͳǦʹ Ǧͳ ȋ ȌǤ ͳ͵ͻ ͳʹ͵ Ǧͳ ͳǦͳ͵ͲǤ ǣ ͳǣͳ ͳǦ ͳ͵Ͳǡ ͳǣʹ ͵ǣʹ ͳǦ ͳ͵Ͳ Ǥ ͳǦͳ͵Ͳ ͳ͵ʹǦ αǡ Ǧ ͳ͵ʹǦαǤ ͳǦ ͳ͵Ͳ ͳʹ Ǧ Ǥ ͳʹ Ǧ ͳ͵ʹǦ ͳǦ ͳ͵Ͳ ǡ ǡ ͳʹ Ǥ ͳ͵ʹǦ α Ǧǡ 130 Ǧ ȋ58ȌǤǡ Ǧ LJȀ ȋǦ ͳͲͶȌ ȋǦ ͳͲͶ ǦʹͷͲȌǡ Ǧ Ǥ ǡ ͳ͵ʹǦ Ǧ Ǧͳ͵ ʹǦ ȋ58ȌǤǡ SynǤ ǣ ͳ͵ʹǦ Ǧ ͳǦͳ͵Ͳǡ ͳʹ͵ͳ͵ͻ Ǧͳǡ Ǥ ͳ͵ͳǦ ͳ ͳͲͲǦͳͷͷͲ Ǧͳ Ǥ ͳǦͳ͵ͲǡǤǤǡ Ǧ ͳ͵ͳǦ α ͳǡ ͳ͵ͳǦ aǦȋȌȋ46ȌǤ Ǧ aȀ a ͳͲȋǦȌȀͳͷȋΪȌ ǦͳȋȋͳͲͳȋǦȌȀͳͶͻȋΪȌ Ǧͳ Ȍ ͷͲ Ǧͳ ͳ͵ͳǦ α a Ǧ Ǥ ǡ ͳ͵ͳǦ αͳͳͻ ǦͳͳǦ ͳ͵Ͳǡͳͺ Ǧͳ ͳǦ ͳ͵Ͳ ǡͳ Ǧͳ ǡ ȋ46,47ȌǤ ǦǣǦͳǦ ͳ͵ͲǡǦ ǦͳǦ ͳ͵Ͳ Ǣ ͳ͵ͳǦ ͳ ͳ͵Ͳ Ǧͳ ͳǦ ͳ͵Ͳǡ ͳͳͷ Ǧͳ ǡ ͳͷͺ Ǧͳ ͳǦ ͳ͵Ͳ ͳͷͺ Ǧͳ ȋȌǤͳǦ ͳ͵Ͳǡ Ͷͻ Ǧͳǡ ͳ͵ͳǦ a ͳ͵ͳǦ ͳ Ǧ Ǥ ʹ Ǧͳ ͳͻȋǦȌȀͳ͵ͲȋΪȌ Ǧͳ ͳ ͳͲȋǦȌȀͳͷȋΪȌ Ǧͳa Ǥ ǡ ǡ ͳ͵ʹǦ α ͳ͵ͻ Ǧͳ ȋ Ȍ ͳ͵ͳǦ α ͳ͵ʹǦαǤ 131 ǡ ͳ͵ͳǦ α ͳ ͳͲ͵ Ǧͳǡ ͷ Ǧͳ Ǥ ȋ47Ȍǡ ȋͳǦ ͳ͵ͲȌǡ ͳǦͳ͵ͲȋͳǦ ͳ͵ͲȌ ȋͳǦ ͳ͵ͲȌǡ ͳͲͷ Ǧͳͳ͵ͳǦ ͳ Ǥ ͳͲͷ Ǧͳ ͳͷͺ Ǧͳ ͳͷͺ Ǧͳ ͳǦ ͳ͵Ͳ ǡ ǡ ǡ ͻͷ ͻʹ Ǧͳ ǡ ͳǦ ͳ͵Ͳ ǡ Ǥ ȋȌ ȋ47ȌǤ ǡ Ǣ ͳ͵ͳǦ α ͳ Ͷͻ Ǧͳ ͳ͵ͳǦ α ȋͳǦ ͳ͵ͲȌǡ ͷ Ǧͳ ͳ͵ͳǦ α Ǧ ȋȌ ͻͳ Ǧͳ ͳ͵ͳǦ α Ǧ ȋͳǦ ͳ͵Ͳ Ȍ ȋ ȌǤ ȋ47ȌǤ ǡ ͳǦ ͳ͵Ͳ Ǥ ͳ͵ͳǦ α ͳ ȋ ȌǤ ǡǦͳ͵ͳǦ ͳ ǡ ͳǦ ͳ͵Ͳ Ǧ ͳ͵ͳǦ ͳǦͳ͵ͲǤ ǡ Ǧ Ǥ ǡ ͳ a Ǧ ȋ46Ȍǡ ͳ͵ͳǦ α ͳǤ ǡ ͳ͵ͳǦαͳǦ ǡ Ǧ ͳ Ǥ ǡ ͳ͵Ͳ Ǧͳ ǡǦͳ͵ͳǦ ͳLJͳǦ ͳ͵Ͳǡ Ǥ ȋͳͶ ͳͷȌ ͳ͵Ͳ Ǧͳ ǡ ͳǤ 132 Ǧ ǡ ǣ ͳ͵ͳǦ α Ǧ ͳǦͳ͵Ͳ ͳ͵ͳǦ α Ǧ Ǥ ͳ͵ʹǦαȋȌǤ ConclusionsǤǡ Ǧ ͳ͵ʹǦͳ͵ͳǦ Ǥ ǡ ͳ͵ʹǦ Ǧȋͳ͵ͻ ǦͳȌͳ͵ͳǦ Ǧ ͳǦͳ͵Ͳ ȋͳͲ͵ Ǧͳ ȌǤ ǡ ͳ͵ʹǦ Ǧ ͳǦͳ͵Ͳ ȋͳʹ͵ Ǧͳ Ȍ ͳ͵ͳǦ Ǧ ȋͳ͵Ͳ ǦͳȌǤ SynǤ Ǧ Ǥ ǣ ȋǦ ǡ Ȍ ǡ ǡ Ǥ ǡ Ǧ ǤǡǦ ͳǡͳ ͳ Ǣ ǡͳǡͳ ͳ ȋȋ20ȌʹȌǤ Ǥ ͳ͵ʹǦ Ǧ ͳ͵ͳǦ Ǧ ͳǦͳ͵Ͳ ͳǤǦ ͳ ͳ͵ͳǦ ͳ Ǥ ǡ ͳ ͳ͵ͳǦ Ǧ ǡ ͳ Ǥ ACKNOWLEDGEMENT ǡ±ǡ± Ǣ Ǥ 133 REFERENCES ͳǤ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥ ȋʹͲͲͷȌ ǡBiochim.Biophys.Acta1706ǡ ͳʹǦ͵ͻǤ ʹǤ ǡ Ǥ Ǥǡ ǡ Ǥ ȋʹͲͲͲȌ ǡPhotosynth.Res.63ǡͳͻͷǦʹͲͺǤ ͵Ǥ ǡǤǤǡǡǤǤǡǡǤǡǡǤǡǡǤȋʹͲͲͶȌ Ǧ ǡ Nature 303ǡ ͳͺ͵ͳǦͳͺ͵ͺǤ ͶǤ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ ȋʹͲͲͷȌ ͵ǤͲ % ǡNature438ǡͳͲͶͲǦͳͲͶͶǤ ͷǤ ǡǤǡǡǤǡ ǡǤǡǡǤǡǡǤǡǡǤ ȋʹͲͲͻȌ ʹǤͻǦ% ǡǡ ǡNat.Struct.Mol.Biol.16ǡ͵͵ͶǦ͵ͶʹǤ Ǥ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥ Ǥǡ ǡ Ǥ Ǥ ȋʹͲͲͳȌ Ǧ ͳǦͳͻͺʹǦͳͻSynechocystis ͺͲ͵ǣ ǡBiochemistry40ǡͻʹͷǦͻʹͺͳǤ Ǥ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡǤȋͳͻͺȌ Ͷ ǡ Biochim.Biophys.Acta893ǡ ʹǦʹͶǤ ͺǤ ǡǤǤǡǡ ǤǡǡǤǤǡǡǤǡǡ ǤǡǡǤ Ǥ ȋͳͻͻʹȌ ǡ Proc. 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ActaǤͳͷͷǣʹͻȂͶͲǤ ǡ Ǥǡ Ǥ ǡ Ǥ Ǥ ǡ Ǥ ǡ Ǥ Ǥ ȋʹͲͲͺȌ ͺͲ͵Ǥ BiochemistryǤͶǣͷͷ͵ȂͷͷͶ͵Ǥ 149 SUMMARY ȋȌ ǡ Ǥ ȋ Ȍǡ Ǧ ȋ ǡ ȌǤ ǡ ǡ Ǧ Ǥ Ǧ ǡ Ǧ Ǥ ǡ ȋ ǡ ȾǦ Ȍ ȋȌ Ǥ ǡ ǡ Ǥ ͳͻͺǤ ǡ ȋ Ȍ Ǥ ʹ Ǥ Ǥ Ǥ Ǥ 151 ͵ Ǧ ÚǤ Ͷ ʹǤ ǡ Ǥ ǡ ȾǦ ǡǦ ǡ Ǥ ȾǦ Ǥ ȋγʹͷ% γͳͲ% Ȍ γʹͲȋͳαͳͲǦͻȌǤǡ ǡ ȋͳͲͲȌǤ ȾǦ ǡ ȾǦ Ǥ ͷ ǣ ȋ Ȍ Ǧ ȋ Ǧ ǡ Ǧ ǦȌǤ Ǧ Ǧ ȋ Ȍ ȋȌ Ǥ Ǥ ǡ ʹǡ Ǧ Ǥ 152 Ǧ Ǧ ȋȌ Ǥ ǡ Ǥ Ǧ Ǧ Ǧ Ǥ Ǧ ǡ Ǧ ǡ ͶǤ ǡ Ǥ Ͷ Ǥ ǡ Ǧ Ǥ Ǥ ǡ Ǥǡ Ǥǡ ǣ Ǥ 153 SAMENVATTING ȋȌǤ±± Ǥ ȋ Ȍǡ Ǧ ȋ ´ǡ ȌǤ ȋ Ȍǡ ǡ Ǧ Ǥ ǡ Dzdzǡ ǡ Ǥ ǡ Ǧ Ǧ Ǧ ȋ ǡ ǡ ȾǦ ȌǤ ǡ ´ ´ ǡ Ǥ ȋȌ ͳͻͺ Ǥ à ǡ ǡ Ǥ Ǥ ʹ Ǥ Dzdzǡ Ǥ Ǥ ǡ Ǥ Ǥ͵´ ǡ ǡ DzǦÚdzǤ 155 Ͷ ʹǤ Ǧ Ǥ ȾǦ ȋȌ ´ Ǥ ȾǦ Ǥ ȋ |ʹͷ% ǡ |ͳͲ% ȌǤ |ͳͲȋͳαͳͲͻȌǡ ȋͳͲͲȌ Ǥ ȾǦ ǡ ǡ ȾǦ Ǥ ͷ ´ ǣ ȋ Ȍǡ ȋ Ǧ ǡ ǦȌǤ Ǧ Ǥ ´ Ǧ´ ȋ Ȍ ȋȌ Ǥ ´ Ǥ ǡ ǦǦ Ǥ à Ǥ Ǧ ǡ Ǧà Ǧ ȋȌ Ǥ Ǧ Ǥ Ǧ Ǧ Ǥ 156 Ǧ ǡ Ͷǡ Ǥ Ͷ ǡ Ǧ Ǧ Ǥ ǦǤ ǡ Ǧ Ǧ Ǥ ´ Ǧ Ǥ ǡ Ǥ Ǥ ´ ǣǤ 157 ListofPublications Romero, EǤǡ ǡ Ǥǡ ǡ Ǥ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǡǤȋʹͲͲͻȌǦǦ Ͷǣ Ǧ ǡBiophysJ.96(5):͵ͷȂ͵ Romero,EǤǡǡǤǤǤǡǡǤǤǡǡǤǤǡ ǡǤȋʹͲͳͲȌ ǡBiochemistry(AcceleratedPublications)49,Ͷ͵ͲͲǦͶ͵Ͳ ǡ Ǥ Ǥǡ Romero, EǤǡ ǡ Ǥ Ǥǡ ǡ Ǥ ȋʹͲͳͳȌ ǣ ǡChemPhysChemǡInpress Romero, EǤǡ ǡ Ǥ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ ȋʹͲͳͳȌ ǣ ǫǡPhys.Chem.Chem.Phys.ȋCommunicationȌǡ ǣͳͲǤͳͲ͵ͻȀͲͲʹͺͻ ǡ Ǥ͓ǡ Romero, EǤ͓ǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ȋʹͲͳͳȌ SynechocystisǤͺͲ͵ǣͶ Ͷ͵ ǡJ.Biol.Chem.,Inpress ͓ Romero, EǤǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥǡ ǣ Ȃ ǡManuscriptinpreparation Romero, EǤǡ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥ Ǥǡ ǡ Ǥǡ Ǧ ȋͺͲȌȋͳȌ Ǧ ǡManuscriptinpreparation Romero, EǤǡ ǡ Ǥǡ ǡ Ǥ Ǥǡ ǡ Manuscript in preparation Romero,EǤǡǡǤǡǡǤǤǡǡǤǤǡ Ͷ͵ Ͷ Synechocystis Ǥ ͺͲ͵ ǡ Manuscript in preparation 159 NAWOORD ǤǤǤǤǡ ǡ Ǥ Ǥ Ǥ Ǥ ǤǤǤǤ ̵ǤǤǤǤ Once upon a time, there was a little girl and her name was Eli. She had experienced the scientific research during the time she was working for her masterdegree.Itwasthere,inthedarknessofthelab,whereshesaidtoherself: "Iwanttobecomeascientist!" Elialsowantedtoexpandherhorizons,shewantednewexperiences....soEli started to look for fellowships outside Spain . . . . first in chemical sciences, nosuccess,....,laterinlifesciences.....andthereitwas:abiophysicsposition inTheNetherlands.Whensheclickedonit,shesawit,itwasinAmsterdam!The moreinfoshewasreadingabouttheproject,themoreinterestedshewasabout it.Thenshethought:thisisthechanceofmylife,Ireallyhavetogetthisposition! Andshedid,shegotit!!!! ǡǡʹǤ ǣ ǡ ǡ ʹ ǡ Ǥ Ǥ Ǥ Ǥ ǡ ǨǨǨ Ǥ ǡ ǡ Ǥ ǡ ǣǡǤǡ ǡ ǡ ǡ ȋ Ȍ Ǥ ǡ ȋȌǡ Ǥ 161 Ǥ ǡ ǡ ǡ ǡ ̵ ǡ afraid Ǥ ǡ ǡ ȋ Ȍǡ ǡ aggressiveȋ ȌǤ ǡ Ǥ Ǥ ǡǡ Ǥ ǡ Ǥ ǡ Ǥ Ǥ ǡ Ǥǡ Ǥ ǡ ǡ Ǥ Ǥ ǡ Ǩ ʹǤǡ ǡ ǡ Ǥ Ǥ ȋ Ȍ Ǥ ȋ ǡǡȌǤ Ǥ ȋ Ȍ Ǥ ǡ ǡ Ǥ ǡ ʹ ǣ ǡ ǡ ǡǡǡǡǡǡ Ǥ ʹ ǡ Ǥ 162 ǣǡ ǡǡǡǡǡǡǡǡǡǡǡ ǡǡ±ǡǡǡǡǡǡǡǡǤǤǤǤ ǡǤǤǤǤ ǤǤǤǤ Ǥ ǣ ǡ ǡǡǡǡǡǡ ǡǡǡǡǡ ǡǡǡǡǡǡǡǡǡǡ ǡǡ ǣǤ ǡ Ǥ Ǥǡǡ Ǥ Ǥ Ǧ ǡ Ǥǡ Ǧ ȋ Ȍǡ Ǥ Ǥ ǡǡ Ǥ Ǩ ǡ Ǥ Synechocystis Ǥ Ǥ Ǥ ǡ ȋ ȌǤ ǡǨ ǣ ǡǡǡǤ Ǥ ǡǤ Ǥ ǡǤ Ǥ ǡ ǡ Ǥ ǡ ǡ ʹǨ 163 ǡ Ǥ ǤǤǤǤǡǨ ǡ Ǩ ǡ ǨǨ ǡǡ Ǥ Ǥ ǡǤǡ ±ÀÓ À × Óǡ Ǥ Ǥ ǡǡǤ× Ǥ Óǡ ǡ ǡ Ǥ ǣ ǡ×ǡǡǡǡǡ ǡ ǡ ǡ Ǥ Ǥ Ǥ Ǥǡ × Ǥ ǡ ǡ Ǥ ǡ Ǥ ǡǡǤ ǤǤ ǡ ǡ Ǥ ǡ Ǥ Ǥ ǡǡ Ǥ Ǥ ǡ ǡ Ǥ ǡ Ǥ ǣ ǡ ǡǤǤǤǤǡǡǤ ǡǤ ǡǤÀǤ ǤǡǤ ǡ Ǥ ÓÀǤ ǡǤ Ǩ ǡǤ 164 ǡ ǨǨ Ǥ ǡ Ǩ ± ǡ À ǡ ǡ Ǥ Ǥ ÀÀǤ×ǡǡ Ǥ ǡ ǨǨ ± ǡ ǤÓǤ± Ǥ± À ȋ ǡ ȌǤ± À Ǥ ï ǡǡǤ ǡ ȋ Ȍ Ǥ ȋ À ǡ À ×ȌǤ ǡ ÀǤ ÀǡǤ 165
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