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Calbindin D28K interacts with Ran-binding protein M: identification of interacting domains by NMR spectroscopy
Ward Lutz1, Elena M Frank, Theodore A Craig
1Department of Biochemistry, Research Center, Mayo Clinic and Foundation, 200 First Street SW, Rochester, MN 55905, USA.
Biochemical and Biophysical Research Communications
|April 10, 2003
Summary
Calcium-loaded Calbindin D(28K) protein interacts with Ran-binding protein M, potentially influencing neurological function. This interaction was confirmed using NMR methods on a specific peptide from Ran-binding protein M.
Area of Science:
- Neuroscience
- Molecular Biology
- Biochemistry
Background:
- Calbindin D(28K) is an EF-hand protein crucial for neurological function.
- Ran-binding protein M is involved in microtubule-related cellular processes.
Purpose of the Study:
- To investigate the interaction between calcium-loaded Calbindin D(28K) and Ran-binding protein M.
- To elucidate the specific binding regions and dynamics of this interaction.
Main Methods:
- Nuclear Magnetic Resonance (NMR) spectroscopy was employed.
- A peptide (LASIKNR) derived from Ran-binding protein M was used to probe interactions.
Main Results:
- Calcium-loaded Calbindin D(28K) directly interacts with the LASIKNR peptide from Ran-binding protein M.
- The interaction involves the amino terminus and other regions of Calbindin D(28K) exhibiting conformational exchange.
- NMR data revealed dynamic binding characteristics.
Conclusions:
- The interaction between Calbindin D(28K) and Ran-binding protein M is confirmed at a molecular level.
- This interaction may play a significant role in the overall function of Calbindin D(28K) within the cell.
- Further research is warranted to explore the physiological implications of this protein-protein interaction.