Related Experiment Videos
Effect of Ca2+ on the structure and function of factor VIIa
1Vessel Wall Biology, Health Care Discovery, Novo Nordisk A/S, Gentofte, Denmark.
Haemostasis
|January 1, 1996
Summary
Calcium (Ca2+) binding to factor VIIa is crucial for its function. Studies identified Ca2+ binding sites on factor VIIa, revealing their role in phospholipid and tissue factor interactions.
Area of Science:
- Biochemistry
- Molecular Biology
- Protein Chemistry
Background:
- Factor VIIa requires calcium ions (Ca2+) for optimal activity.
- Ca2+ binding is essential for factor VIIa's interaction with phospholipids and tissue factor.
Purpose of the Study:
- To map the Ca2+ binding sites on factor VIIa.
- To elucidate the functional significance of Ca2+ binding to these specific sites.
Main Methods:
- Recombinant factor VIIa and its fragments were used.
- Ca2+-dependent monoclonal antibodies, immunosorbent assays, intrinsic protein fluorescence, and terbium luminescence techniques were employed.
Main Results:
- Specific Ca2+ binding sites on factor VIIa were localized.
- The functional implications of Ca2+ binding were clarified through these binding studies.
Conclusions:
- The study provides a better understanding of Ca2+ 's role in factor VIIa function.
- A putative model for Ca2+ binding to factor VIIa has been proposed based on the experimental findings.