Cryo-EM structure of the photosynthetic RC-LH1-PufX supercomplex at 2.8-Å resolution
Laura Bracun, Atsushi Yamagata, Bern M. Christianson, Tohru Terada, Daniel P. Canniffe, Mikako Shirouzu, Lu‐Ning Liu
Abstract
at 2.8-Å resolution. The RC-LH1-PufX monomer contains an LH ring of 15 αβ-polypeptides with a 30-Å gap formed by PufX. PufX acts as a molecular "cross brace" to reinforce the RC-LH1 structure. The unusual PufX-mediated large opening in the LH1 ring and defined arrangement of proteins and cofactors provide the molecular basis for the assembly of a robust RC-LH1-PufX supercomplex and efficient quinone transport and electron transfer. These architectural features represent the natural strategies for anoxygenic photosynthesis and environmental adaptation.
Topics & Concepts
PhotosynthesisStructure functionResolution (logic)Function (biology)ChemistryMaterials sciencePhysicsComputer scienceBiologyCell biologyBiochemistryParticle physicsArtificial intelligencePhotosynthetic Processes and MechanismsPhysics of Superconductivity and MagnetismAdvanced Chemical Physics Studies