title: A virus-based nanoblock with tunable electrostatic properties.
abstract: Five different "HIS tag" mutants of cowpea mosaic virus were made by genetically introducing six contiguous histidine residues at various locations on the virus capsid. The mutant particles showed differential affinity for binding nickel, and their electrostatic properties could be controlled as a function of the protonation state of the exposed histidine sequence. The specific addressability of the HIS tag was corroborated by the selective modification of the histidine sequence with nanogold cross-linked to the Ni-NTA moiety.
authors.affiliation: Department of Molecular Biology and Center for Integrative and Molecular Biosciences, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California, USA.
authors.forename: Anju
authors.initials: A
authors.lastname: Chatterji
authors.forename: Wendy F
authors.initials: WF
authors.lastname: Ochoa
authors.forename: Takafumi
authors.initials: T
authors.lastname: Ueno
authors.forename: Tianwei
authors.initials: T
authors.lastname: Lin
authors.forename: John E
authors.initials: JE
authors.lastname: Johnson
mesh_terms: D000595:Amino Acid Sequence; D002213:Capsid / Q000737:chemistry*; D017798:Comovirus / Q000737:chemistry* / Q000235:genetics; D020285:Cryoelectron Microscopy; D006046:Gold / Q000737:chemistry; D006639:Histidine / Q000737:chemistry* / Q000235:genetics; D008969:Molecular Sequence Data; D009154:Mutation / Q000235:genetics; D049329:Nanostructures / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry; D055672:Static Electricity
chemical_list: D006639:Histidine; D006046:Gold; D009532:Nickel