5et3

Publication Abstract from PubMed

Learning to engineer self-assembly would enable the precise organization of molecules by design to create matter with tailored properties. Here we demonstrate that proteins can direct the self-assembly of buckminsterfullerene (C60) into ordered superstructures. A previously engineered tetrameric helical bundle binds C60 in solution, rendering it water soluble. Two tetramers associate with one C60, promoting further organization revealed in a 1.67-A crystal structure. Fullerene groups occupy periodic lattice sites, sandwiched between two Tyr residues from adjacent tetramers. Strikingly, the assembly exhibits high charge conductance, whereas both the protein-alone crystal and amorphous C60 are electrically insulating. The affinity of C60 for its crystal-binding site is estimated to be in the nanomolar range, with lattices of known protein crystals geometrically compatible with incorporating the motif. Taken together, these findings suggest a new means of organizing fullerene molecules into a rich variety of lattices to generate new properties by design.

Protein-directed self-assembly of a fullerene crystal.,Kim KH, Ko DK, Kim YT, Kim NH, Paul J, Zhang SQ, Murray CB, Acharya R, DeGrado WF, Kim YH, Grigoryan G Nat Commun. 2016 Apr 26;7:11429. doi: 10.1038/ncomms11429. PMID:27113637^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.