Download MendeleyA Membrane-Associated Light-Harvesting Model is Enabled by Functionalized Assemblies of Gene-Doubled TMV Proteins.
Dai, J., Wilhelm, K.B., Bischoff, A.J., Pereira, J.H., Dedeo, M.T., Garcia-Almedina, D.M., Adams, P.D., Groves, J.T., Francis, M.B.(2023) Small 19: e2207805-e2207805
- PubMed: 36811150
- DOI: https://doi.org/10.1002/smll.202207805
- Primary Citation of Related Structures:
8EAW - PubMed Abstract:
Photosynthetic light harvesting requires efficient energy transfer within dynamic networks of light-harvesting complexes embedded within phospholipid membranes. Artificial light-harvesting models are valuable tools for understanding the structural features underpinning energy absorption and transfer within chromophore arrays. Here, a method for attaching a protein-based light-harvesting model to a planar, fluid supported lipid bilayer (SLB) is developed. The protein model consists of the tobacco mosaic viral capsid proteins that are gene-doubled to create a tandem dimer (dTMV). Assemblies of dTMV break the facial symmetry of the double disk to allow for differentiation between the disk faces. A single reactive lysine residue is incorporated into the dTMV assemblies for the site-selective attachment of chromophores for light absorption. On the opposing dTMV face, a cysteine residue is incorporated for the bioconjugation of a peptide containing a polyhistidine tag for association with SLBs. The dual-modified dTMV complexes show significant association with SLBs and exhibit mobility on the bilayer. The techniques used herein offer a new method for protein-surface attachment and provide a platform for evaluating excited state energy transfer events in a dynamic, fully synthetic artificial light-harvesting system.
Organizational Affiliation:
Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA.
