Programming A Molecular Relay for Ultrasensitive Biodetection through 129 Xe NMR
Journal Article
·
· Angewandte Chemie (International Edition)
- Univ. of Pennsylvania, Philadelphia, PA (United States)
We reported a supramolecular strategy for detecting specific proteins in complex media by using hyperpolarized 129Xe NMR. A cucurbit[6]uril (CB[6])-based molecular relay was programmed for three sequential equilibrium conditions by designing a two-faced guest (TFG) that initially binds CB[6] and blocks the CB[6]–Xe interaction. Moreover, the protein analyte recruits the TFG and frees CB[6] for Xe binding. TFGs containing CB[6]- and carbonic anhydrase II (CAII)-binding domains were synthesized in one or two steps. X-ray crystallography confirmed TFG binding to Zn2+ in the deep CAII active-site cleft, which precludes simultaneous CB[6] binding. The molecular relay was reprogrammed to detect avidin by using a different TFG. Finally, Xe binding by CB[6] was detected in buffer and in E. coli cultures expressing CAII through ultrasensitive 129Xe NMR spectroscopy.
- Research Organization:
- Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
- Sponsoring Organization:
- National Institutes of Health (NIH); USDOE
- OSTI ID:
- 1260842
- Journal Information:
- Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 5 Vol. 55; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Rotaxane-mediated suppression and activation of cucurbit[6]uril for molecular detection by 129 Xe hyperCEST NMR
Targeted Molecular Imaging of Cancer Cells Using MS2-Based 129 Xe NMR
A Structural Basis for 129Xe Hyper-CEST Signal in TEM-1 β-Lactamase
Journal Article
·
Thu Jan 14 23:00:00 EST 2016
· ChemComm
·
OSTI ID:1378760
Targeted Molecular Imaging of Cancer Cells Using MS2-Based 129 Xe NMR
Journal Article
·
Sun Jul 24 20:00:00 EDT 2016
· Bioconjugate Chemistry
·
OSTI ID:1378338
A Structural Basis for 129Xe Hyper-CEST Signal in TEM-1 β-Lactamase
Journal Article
·
Wed Sep 12 20:00:00 EDT 2018
· ChemPhysChem
·
OSTI ID:1569911