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TitleStructure of a biohybrid photosystem I-platinum nanoparticle solar fuel catalyst.
Journal, issue, pagesNat Commun, Vol. 15, Issue 1, Page 9519, Year 2024
Publish dateNov 4, 2024
AuthorsChristopher J Gisriel / Tirupathi Malavath / Tianyin Qiu / Jan Paul Menzel / Victor S Batista / Gary W Brudvig / Lisa M Utschig /
PubMed AbstractBiohybrid solar fuel catalysts leverage natural light-driven enzymes to produce valuable fuel products. One useful biological platform for such a system is photosystem I, a pigment-protein complex ...Biohybrid solar fuel catalysts leverage natural light-driven enzymes to produce valuable fuel products. One useful biological platform for such a system is photosystem I, a pigment-protein complex that captures sunlight and converts it into chemical energy with near unity quantum efficiency, which generates low potential reducing equivalents for metabolism. Realizing and understanding the molecular basis for an approach that utilizes those electrons and stores solar energy as a fuel is therefore appealing. Here, we report the 2.27-Å global resolution cryo-EM structure of a photosystem I complex with bound platinum nanoparticles that catalyzes light-driven H production. The platinum nanoparticle binding sites and possible stabilizing interactions are described. Overall, the investigation reveals a direct structural look at a photon-to-fuels photosynthetic biohybrid system.
External linksNat Commun / PubMed:39496605 / PubMed Central
MethodsEM (single particle)
Resolution2.27 Å
Structure data

43525

8vu3

EMDB-43525, PDB-8vu3:
Cryo-EM structure of cyanobacterial PSI with bound platinum nanoparticles
Method: EM (single particle) / Resolution: 2.27 Å

Chemicals

ChemComp-CL0:
CHLOROPHYLL A ISOMER

ChemComp-CLA:
CHLOROPHYLL A

ChemComp-PQN:
PHYLLOQUINONE

ChemComp-SF4:
IRON/SULFUR CLUSTER

ChemComp-BCR:
BETA-CAROTENE

ChemComp-LHG:
1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / phospholipid*YM

ChemComp-LMG:
1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE

ChemComp-CA:
Unknown entry

Source
  • thermostichus lividus (bacteria)
KeywordsPHOTOSYNTHESIS / cyanobacteria / biohybrid / platinum nanoparticles / hydrogen production / photosystem I / solar fuel

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