Christopher J. Gisriel
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View article: Remembering Don Bryant (1950–2024)
Remembering Don Bryant (1950–2024) Open
View article: Structure and evolution of photosystem I in the early-branching cyanobacterium <i>Anthocerotibacter panamensis</i>
Structure and evolution of photosystem I in the early-branching cyanobacterium <i>Anthocerotibacter panamensis</i> Open
Thylakoid-free cyanobacteria are thought to preserve ancestral traits of early-evolving organisms capable of oxygenic photosynthesis. However, and until recently, photosynthesis studies in thylakoid-free cyanobacteria were only possible in…
View article: Abstract 1188 Toward the structural basis of far-red light photoacclimation in Photosystem I of Fischerella thermalis PCC 7521
Abstract 1188 Toward the structural basis of far-red light photoacclimation in Photosystem I of Fischerella thermalis PCC 7521 Open
View article: Investigations into cyanobacterial photoacclimation processes address longstanding proposals for improving crop yields
Investigations into cyanobacterial photoacclimation processes address longstanding proposals for improving crop yields Open
View article: Cryo-EM structure of a photosystem I variant containing an unusual plastoquinone derivative in its electron transfer chain
Cryo-EM structure of a photosystem I variant containing an unusual plastoquinone derivative in its electron transfer chain Open
Photosystem I (PS I) is a light-driven oxidoreductase responsible for converting photons into chemical bond energy. Its application for renewable energy was revolutionized by the creation of the MenB deletion (Δ menB ) variant in the cyano…
View article: Structure of a biohybrid photosystem I-platinum nanoparticle solar fuel catalyst
Structure of a biohybrid photosystem I-platinum nanoparticle solar fuel catalyst Open
View article: Structure and evolution of Photosystem I in the early-branching cyanobacterium<i>Anthocerotibacter panamensis</i>
Structure and evolution of Photosystem I in the early-branching cyanobacterium<i>Anthocerotibacter panamensis</i> Open
Thylakoid-free cyanobacteria are thought to preserve ancestral traits of early-evolving organisms capable of oxygenic photosynthesis. However, and until recently, photosynthesis studies in thylakoid-free cyanobacteria were only possible in…
View article: Structure of a biohybrid photosystem I-platinum nanoparticle solar fuel catalyst
Structure of a biohybrid photosystem I-platinum nanoparticle solar fuel catalyst Open
View article: Assignment of chlorophyll d in the ChlD1 site of the electron transfer chain of far-red light acclimated photosystem II supported by MCCE binding calculations
Assignment of chlorophyll d in the ChlD1 site of the electron transfer chain of far-red light acclimated photosystem II supported by MCCE binding calculations Open
View article: The structural basis for light harvesting in organisms producing phycobiliproteins
The structural basis for light harvesting in organisms producing phycobiliproteins Open
Cyanobacteria, red algae, and cryptophytes produce 2 classes of proteins for light harvesting: water-soluble phycobiliproteins (PBP) and membrane-intrinsic proteins that bind chlorophylls (Chls) and carotenoids. In cyanobacteria, red algae…
View article: Recent structural discoveries of photosystems I and II acclimated to absorb far-red light
Recent structural discoveries of photosystems I and II acclimated to absorb far-red light Open
View article: Structure of the antenna complex expressed during far-red light photoacclimation in Synechococcus sp. PCC 7335
Structure of the antenna complex expressed during far-red light photoacclimation in Synechococcus sp. PCC 7335 Open
Far-red light photoacclimation, or FaRLiP, is a facultative response exhibited by some cyanobacteria that allows them to absorb and utilize lower energy light (700-800 nm) than the wavelengths typically used for oxygenic photosynthesis (40…
View article: Molecular diversity and evolution of far-red light-acclimated photosystem I
Molecular diversity and evolution of far-red light-acclimated photosystem I Open
The need to acclimate to different environmental conditions is central to the evolution of cyanobacteria. Far-red light (FRL) photoacclimation, or FaRLiP, is an acclimation mechanism that enables certain cyanobacteria to use FRL to drive p…
View article: Two-Dimensional Electronic Spectroscopy of the Far-Red-Light Photosystem II Reaction Center
Two-Dimensional Electronic Spectroscopy of the Far-Red-Light Photosystem II Reaction Center Open
Understanding the role of specific pigments in primary energy conversion in the photosystem II (PSII) reaction center has been impeded by the spectral overlap of its constituent pigments. When grown in far-red light, some cyanobacteria inc…
View article: Computing the relative affinity of chlorophylls 𝘢 and 𝘣 to light-harvesting complex II
Computing the relative affinity of chlorophylls 𝘢 and 𝘣 to light-harvesting complex II Open
In plants and algae, the primary antenna protein bound to photosystem II is light harvesting complex II (LHCII), a pigment-protein complex that binds both chlorophyll (Chl) 𝘢 and Chl 𝘣 molecules. Chl 𝘢 and Chl 𝘣 have similar structures but…
View article: Structural comparison of allophycocyanin variants reveals the molecular basis for their spectral differences
Structural comparison of allophycocyanin variants reveals the molecular basis for their spectral differences Open
Allophycocyanins are phycobiliproteins that absorb red light and transfer the energy to the reaction centers of oxygenic photosynthesis in cyanobacteria and red algae. Recently, it was shown that some allophycocyanins absorb far-red light …
View article: A quantitative assessment of (bacterio)chlorophyll assignments in the cryo-EM structure of the Chloracidobacterium thermophilum reaction center
A quantitative assessment of (bacterio)chlorophyll assignments in the cryo-EM structure of the Chloracidobacterium thermophilum reaction center Open
View article: Computing the relative affinity of chlorophylls a and b to light-harvesting complex II
Computing the relative affinity of chlorophylls a and b to light-harvesting complex II Open
In plants and algae, the primary antenna protein bound to photosystem II is light harvesting complex II (LHCII), a pigment-protein complex that binds both chlorophyll (Chl) a and Chl b molecules. Chl a and Chl b have similar structures but…
View article: Computing the relative affinity of chlorophylls 𝘢 and 𝘣 to light-harvesting complex II
Computing the relative affinity of chlorophylls 𝘢 and 𝘣 to light-harvesting complex II Open
Simulation data for MCCE and FEP on Pea (PDB: 2BHW) and Spinach (PDB: 1RWT) LHCII. MCCE step2_out files and the coordinates for the refitted spinach structure. Simulation data for FEP input/output files.
View article: Computing the relative affinity of chlorophylls 𝘢 and 𝘣 to light-harvesting complex II
Computing the relative affinity of chlorophylls 𝘢 and 𝘣 to light-harvesting complex II Open
Simulation data for MCCE and FEP on Pea (PDB: 2BHW) and Spinach (PDB: 1RWT) LHCII. MCCE step2_out files and the coordinates for the refitted spinach structure. Simulation data for FEP input/output files.
View article: Helical allophycocyanin nanotubes absorb far-red light in a thermophilic cyanobacterium
Helical allophycocyanin nanotubes absorb far-red light in a thermophilic cyanobacterium Open
To compete in certain low-light environments, some cyanobacteria express a paralog of the light-harvesting phycobiliprotein, allophycocyanin (AP), that strongly absorbs far-red light (FRL). Using cryo–electron microscopy and time-resolved …
View article: Structure of a dimeric photosystem II complex from a cyanobacterium acclimated to far-red light
Structure of a dimeric photosystem II complex from a cyanobacterium acclimated to far-red light Open
View article: How to correct relative voxel scale factors for calculations of vector-difference Fourier maps in cryo-EM
How to correct relative voxel scale factors for calculations of vector-difference Fourier maps in cryo-EM Open
The atomic coordinates derived from cryo-electron microscopy (cryo-EM) maps can be inaccurate when the voxel scaling factors are not properly calibrated. Here, we describe a method for correcting relative voxel scaling factors between pair…
View article: Molecular Evolution of Far-Red Light-Acclimated Photosystem II
Molecular Evolution of Far-Red Light-Acclimated Photosystem II Open
Cyanobacteria are major contributors to global carbon fixation and primarily use visible light (400−700 nm) to drive oxygenic photosynthesis. When shifted into environments where visible light is attenuated, a small, but highly diverse and…
View article: Glycerol binding at the narrow channel of photosystem II stabilizes the low-spin S2 state of the oxygen-evolving complex
Glycerol binding at the narrow channel of photosystem II stabilizes the low-spin S2 state of the oxygen-evolving complex Open
View article: Changes in supramolecular organization of cyanobacterial thylakoid membrane complexes in response to far-red light photoacclimation
Changes in supramolecular organization of cyanobacterial thylakoid membrane complexes in response to far-red light photoacclimation Open
Cyanobacteria are ubiquitous in nature and have developed numerous strategies that allow them to live in a diverse range of environments. Certain cyanobacteria synthesize chlorophylls d and f to acclimate to niches enriched in far-red ligh…
View article: Comparison of PsbQ and Psb27 in photosystem II provides insight into their roles
Comparison of PsbQ and Psb27 in photosystem II provides insight into their roles Open
View article: High-resolution cryo-electron microscopy structure of photosystem II from the mesophilic cyanobacterium, <i>Synechocystis</i> sp. PCC 6803
High-resolution cryo-electron microscopy structure of photosystem II from the mesophilic cyanobacterium, <i>Synechocystis</i> sp. PCC 6803 Open
Significance Photosystem II (PSII) is a photo-oxidoreductase that harnesses light energy to use water to make fuel. Water oxidation occurs at a metal cluster in the active site called the oxygen-evolving complex (OEC). Understanding PSII f…
View article: Structure of a monomeric photosystem II core complex from a cyanobacterium acclimated to far-red light reveals the functions of chlorophylls d and f
Structure of a monomeric photosystem II core complex from a cyanobacterium acclimated to far-red light reveals the functions of chlorophylls d and f Open
View article: Structure of a photosystem I-ferredoxin complex from a marine cyanobacterium provides insights into far-red light photoacclimation
Structure of a photosystem I-ferredoxin complex from a marine cyanobacterium provides insights into far-red light photoacclimation Open