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Title: Nanosecond time-resolved infrared spectroscopy for the study of electron transfer in photosystem I

Journal Article · · Photosynthesis Research

Abstract Microsecond time-resolved step-scan FTIR difference spectroscopy was used to study photosystem I (PSI) from Thermosynechococcus vestitus BP-1 ( T. vestitus, formerly known as T. elongatus ) at 77 K. In addition, photoaccumulated (P700 + –P700) FTIR difference spectra were obtained at both 77 and 293 K. The FTIR difference spectra are presented here for the first time. To extend upon these FTIR studies nanosecond time-resolved infrared difference spectroscopy was also used to study PSI from T. vestitus at 296 K. Nanosecond infrared spectroscopy has never been used to study PSI samples at physiological temperatures, and here it is shown that such an approach has great value as it allows a direct probe of electron transfer down both branches in PSI. In PSI at 296 K, the infrared flash-induced absorption changes indicate electron transfer down the B- and A-branches is characterized by time constants of 33 and 364 ns, respectively, in good agreement with visible spectroscopy studies. These time constants are associated with forward electron transfer from A 1 to F X on the B- and A-branches, respectively. At several infrared wavelengths flash-induced absorption changes at 296 K recover in tens to hundreds of milliseconds. The dominant decay phase is characterized by a lifetime of 128 ms. These millisecond changes are assigned to radical pair recombination reactions, with the changes being associated primarily with P700 + rereduction. This conclusion follows from the observation that the millisecond infrared spectrum is very similar to the photoaccumulated (P700 + –P700) FTIR difference spectrum.

Research Organization:
Georgia State Univ., Atlanta, GA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0017937
OSTI ID:
1988694
Journal Information:
Photosynthesis Research, Journal Name: Photosynthesis Research Journal Issue: 2-3 Vol. 159; ISSN 0166-8595
Publisher:
Springer Science + Business MediaCopyright Statement
Country of Publication:
Netherlands
Language:
English

References (56)

The Directionality of Electron Transport in Photosystem I book January 2006
Function and organization of Photosystem I polypeptides journal May 1995
Isolation and characterization of a PSI–LHCI super-complex and its sub-complexes from a siphonaceous marine green alga, Bryopsis Corticulans journal September 2014
Time-resolved infrared spectroscopy in the study of photosynthetic systems journal September 2016
Reversible inhibition and reactivation of electron transfer in photosystem I journal May 2020
Time-resolved infrared absorption spectroscopy applied to photoinduced reactions: how and why journal February 2022
Investigation of models for photosynthetic electron acceptors journal February 1990
Photosystem I book January 1991
Fourier transform infrared spectroscopy of primary electron donors in type I photosynthetic reaction centers journal October 2001
Rapid-scan Fourier transform infrared spectroscopy shows coupling of GLu-L212 protonation and electron transfer to QB in Rhodobacter sphaeroides reaction centers journal February 2002
Temperature dependence of biphasic forward electron transfer from the phylloquinone(s) A1 in photosystem I: only the slower phase is activated journal April 2003
Electron transfer and arrangement of the redox cofactors in photosystem I journal February 1997
Near-IR absorbance changes and electrogenic reactions in the microsecond-to-second time domain in Photosystem I journal January 1997
Assignment of a kinetic component to electron transfer between iron–sulfur clusters FX and FA/B of Photosystem I journal November 2006
Protein–cofactor interactions in bioenergetic complexes: The role of the A1A and A1B phylloquinones in Photosystem I journal September 2009
Vibrational spectroscopy of photosystem I journal January 2015
Time-resolved visible and infrared difference spectroscopy for the study of photosystem I with different quinones incorporated into the A1 binding site journal March 2015
Modeling electron transfer in photosystem I journal June 2016
Mutations in algal and cyanobacterial Photosystem I that independently affect the yield of initial charge separation in the two electron transfer cofactor branches journal January 2018
Structure and function of wild-type and subunit-depleted photosystem I in Synechocystis journal September 2018
Calculated vibrational properties of semiquinones in the A1 binding site in photosystem I journal September 2019
Time-resolved FTIR difference spectroscopy for the study of quinones in the A1 binding site in photosystem I: Identification of neutral state quinone bands journal June 2020
Time-resolved FTIR difference spectroscopy for the study of photosystem I with high potential naphthoquinones incorporated into the A1 binding site journal January 2023
Time-resolved visible and infrared absorption spectroscopy data obtained using photosystem I particles with non-native quinones incorporated into the A1 binding site journal June 2016
Directionality of electron transfer in cyanobacterial photosystem I at 298 and 77 K journal May 2015
Infrared Difference Spectroscopy of Proteins: From Bands to Bonds journal March 2020
Universality of Energy and Electron Transfer Processes in Photosystem I journal November 1995
Observation of the Reduction and Reoxidation of the Primary Electron Acceptor in Photosystem I journal March 1994
A Fourier Transform Infrared Absorption Difference Spectrum Associated with the Reduction of A 1 in Photosystem I:  Are Both Phylloquinones Involved in Electron Transfer? journal March 2001
A 1 Reduction in Intact Cyanobacterial Photosystem I Particles Studied by Time-Resolved Step-Scan Fourier Transform Infrared Difference Spectroscopy and Isotope Labeling journal February 2005
Temperature Dependence of Forward and Reverse Electron Transfer from A 1 - , the Reduced Secondary Electron Acceptor in Photosystem I journal June 1998
Low-Frequency Fourier Transform Infrared Spectroscopy of the Oxygen-Evolving and Quinone Acceptor Complexes in Photosystem II journal April 1999
FTIR Study of the Primary Electron Donor of Photosystem I (P700) Revealing Delocalization of the Charge in P700 + and Localization of the Triplet Character in 3 P700 journal September 1999
Electrochemical and infrared-spectroscopic characterization of redox reactions of p-quinones journal December 1992
Protein Dynamics in the Bacteriorhodopsin Photocycle:  A Nanosecond Step-Scan FTIR Investigation of the KL to L Transition journal January 1996
Low-frequency fourier transform infrared spectroscopy of the oxygen-evolving complex in Photosystem II* journal October 2000
Three-dimensional structure of cyanobacterial photosystem I at 2.5 Å resolution journal June 2001
Crystal structure of plant photosystem I journal December 2003
The electron–proton bottleneck of photosynthetic oxygen evolution journal May 2023
Photobiological systems studied by time-resolved infrared spectroscopy (2015–2018) book January 2019
Activation energies for two steps in the S 2 → S 3 transition of photosynthetic water oxidation from time-resolved single-frequency infrared spectroscopy journal December 2020
Evidence for two active branches for electron transfer in photosystem I journal March 2001
Biochemical and Biophysical Characterization of Photosystem I from Phytoene Desaturase and ζ-Carotene Desaturase Deletion Mutants of Synechocystis Sp. PCC 6803 : EVIDENCE FOR PsaA- AND PsaB-SIDE ELECTRON TRANSPORT IN CYANOBACTERIA journal March 2005
Structure of Plant Photosystem I Revealed by Theoretical Modeling journal September 2005
Insights into the binding behavior of native and non-native cytochromes to photosystem I from Thermosynechococcus elongatus journal April 2018
Modelling electron transfer in photosystem I: limits and perspectives journal March 2019
Structural basis for energy transfer pathways in the plant PSI-LHCI supercomplex journal May 2015
Genetic Analysis of the form and Function of Photosystem i and Photosystem ii journal December 1995
Structure and Function of Photosystem I journal June 1992
Rapid-scan FTIR difference spectroscopy applied to ubiquinone reduction in photosynthetic reaction centers: Role of redox mediators journal January 2010
Time-Resolved Step-Scan Fourier Transform Infrared and Visible Absorption Difference Spectroscopy for the Study of Photosystem I journal July 2001
Molecular Reaction Mechanisms of Proteins Monitored by Nanosecond Step-Scan FT-IR Difference Spectroscopy journal April 1997
Errors and Artifacts in Time-Resolved Step-Scan FT-IR Spectroscopy journal August 1999
Heterodimeric Versus Homodimeric Structure of the Primary Electron Donor in Rhodobacter sphaeroides Reaction Centers Genetically Modified at Position M202‡ journal January 2000
Crystal structures of virus-like photosystem I complexes from the mesophilic cyanobacterium Synechocystis PCC 6803 journal January 2014
The structure of plant photosystem I super-complex at 2.8 Å resolution journal June 2015