Related Experiment Video
Updated: Dec 31, 2025
Author Spotlight: Evaluating Biophysical Assays for Characterizing PROTACS Ternary Complexes
Published on: January 12, 2024
Biophysical study on complex formation between β-Lactoglobulin and vitamin B12
Bikash Chandra Swain1, Suchismita Subadini2, Janmejaya Rout1
1Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India.
This study reveals how vitamin B12 binds to beta-lactoglobulin (βLG), a major whey protein. Findings show a stable interaction with implications for the food and pharmaceutical industries.
Area of Science:
- Biophysics
- Protein-ligand interactions
- Spectroscopy
Background:
- Beta-lactoglobulin (βLG) is a primary whey protein with potential applications.
- Vitamin B12 is an essential nutrient with various biological roles.
Purpose of the Study:
- To elucidate the biophysical binding interaction between βLG and vitamin B12.
- To investigate the structural stability of βLG upon vitamin B12 complexation.
Main Methods:
- Steady-state and time-resolved fluorescence spectroscopy.
- Circular Dichroism (CD) spectroscopy.
- Fluorescence Correlation Spectroscopy (FCS).
Main Results:
- Vitamin B12 statically quenched βLG intrinsic fluorescence, indicating ground-state complex formation.
- Synchronous fluorescence spectra showed vitamin B12 alters the tryptophan residue microenvironment.
- CD and FCS confirmed that βLG's secondary and tertiary structures remain stable.
Conclusions:
- A stable ground-state complex forms between βLG and vitamin B12.
- The interaction does not significantly alter βLG's overall structure.
- Potential applications exist in food and pharmaceutical formulations.
More Related Videos
10:01Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies
Published on: November 28, 2017
09:30Analyzing Dynamic Protein Complexes Assembled On and Released From Biolayer Interferometry Biosensor Using Mass Spectrometry and Electron Microscopy
Published on: August 6, 2018
Related Concept Videos
02:18The Equilibrium Binding Constant and Binding Strength
02:21Globular and Fibrous Proteins
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...