Related Experiment Videos
Strategy for obtaining non-native protein structures using antibody cross-reactions.
1Whitehead Institute for Biomedical Research, Cambridge, MA 02142.
Biophysical Chemistry
|August 1, 1988
Summary
Antibodies targeting protein fragments can bind intact proteins, revealing non-native structures. This cross-reactivity allows researchers to study protein folding intermediates using advanced NMR techniques.
Area of Science:
- Biochemistry
- Structural Biology
- Protein Chemistry
Background:
- Antibodies generated against short peptides or unfolded proteins frequently exhibit cross-reactivity with intact, native protein structures.
- This phenomenon presents an opportunity to probe and stabilize transient, non-native protein conformations.
Purpose of the Study:
- To investigate the utility of antibody cross-reactivity in accessing and characterizing non-native protein conformations.
- To explore the potential of using these cross-reactions to study protein folding intermediates.
Main Methods:
- Utilizing antibodies specific to peptide epitopes or denatured protein states.
- Employing amide proton exchange measurements to assess structural dynamics.
- Applying two-dimensional Nuclear Magnetic Resonance (2D NMR) spectroscopy for structural elucidation.
Main Results:
- Demonstrated that antibody cross-reactivity can indeed stabilize and populate non-native protein conformations.
- Successfully characterized the structures of these antibody-bound non-native states using amide proton exchange and 2D NMR.
- Provided insights into the structural features of potential protein folding intermediates.
Conclusions:
- Antibody cross-reactivity is a valuable tool for accessing and studying transient non-native protein structures.
- Amide proton exchange and 2D NMR are effective methods for characterizing the structures of these conformations.
- This approach offers a novel pathway to investigate the complex process of protein folding.