Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 131, Issue 15, Pages 5478-5482Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja807917t
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Funding
- Austrian Science Foundation (FWF) [P17516, N00104, P18384]
- BMBF
- Austrian Science Fund (FWF) [P17516, P18384] Funding Source: Austrian Science Fund (FWF)
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Human rhinovirus serotype 2 (HRV2) specifically binds to very-low-density lipoprotein receptor (VLDLR). Among the eight extracellular repeats of VLDLR, the third module (V3) has the highest affinity for the virus, and 12 copies of the genetically engineered concatamer V33333-His(6) were found to bind per virus particle. In the present study, ring formation of V33333-His(6) about each of the 12 5-fold symmetry axes on HRV2 was demonstrated by fluorescence resonance energy transfer (FRET) between donor and acceptor on N- and C-terminus, respectively. In particular, the N-terminus of V33333-HiS(6) was labeled with fluorescein, and the C-terminus with a new quencher which was bound to the Hiss tag with nanomolar affinity (K-d similar to 10(-8) M) in the presence of 2 mu M NiCl2.
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