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Updated: Apr 21, 2026
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Optimized Negative Staining: a High-throughput Protocol for Examining Small and Asymmetric Protein Structure by Electron Microscopy
Published on: August 15, 2014
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Ovine β-lactoglobulin at atomic resolution.
George Kontopidis1, Anna Nordle Gilliver1, Lindsay Sawyer1
1Structural Biochemistry Group, Institute of Cell and Molecular Biology, The University of Edinburgh, Swann Building, King's Buildings, Mayfield Road, Edinburgh EH10 3BF, Scotland.
Acta Crystallographica. Section F, Structural Biology Communications
|November 6, 2014
Summary
Sheep beta-lactoglobulin
Area of Science:
- Biochemistry
- Structural Biology
- Crystallography
Background:
- Beta-lactoglobulin (BLG) is a major milk protein.
- BLG undergoes pH-dependent conformational changes.
- Previous studies on bovine and porcine BLG revealed these transitions.
Purpose of the Study:
- To determine the crystal structure of sheep beta-lactoglobulin (Ovis aries) at high resolution.
- To compare the structure of ovine BLG with bovine BLG at different pH values.
- To investigate the structural basis of BLG's conformational stability.
Main Methods:
- X-ray crystallography
- Protein structure determination at 1.1 Å resolution
- Comparative structural analysis
Main Results:
- The crystal structure of triclinic sheep BLG was determined at 1.1 Å resolution.
- Sheep BLG structure is highly similar to bovine BLG, despite known pH-dependent transitions.
- A significant internal void was observed in the unliganded ovine BLG structure.
Conclusions:
- High-resolution structure reveals remarkable similarity across BLG species and pH states.
- The structural similarity suggests potential mechanisms for maintaining protein integrity.
- Further investigation is needed to understand the role of loop flexibility in compensating for internal voids.
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