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A general method for the preparation of internally quenched fluorogenic protease substrates using solid-phase peptide
L L Maggiora1, C W Smith, Z Y Zhang
1Biochemistry Unit, Upjohn Laboratories, Kalamazoo, Michigan 49001.
Journal of Medicinal Chemistry
|October 16, 1992
Summary
Researchers developed a solid-phase synthesis method for fluorescent peptide substrates. This technique enables the creation of donor/acceptor labeled peptides for enzyme activity assays, demonstrated with renin and HIV proteinase substrates.
Area of Science:
- Biochemistry
- Organic Chemistry
- Molecular Biology
Background:
- Fluorescent peptide substrates are crucial for studying enzyme kinetics and inhibitor screening.
- Existing methods for synthesizing these substrates can be complex and inefficient.
Purpose of the Study:
- To present a general and efficient solid-phase synthesis scheme for fluorescent donor/acceptor peptide substrates.
- To demonstrate the versatility of the method by synthesizing substrates for specific proteases.
Main Methods:
- Utilized solid-phase synthesis methodology.
- Incorporated a 5-[(2'-aminoethyl)-amino]naphthelenesulfonic acid (EDANS) modified glutamic acid derivative as the fluorescent donor.
- Attached a 4-[[4-(dimethylamino)phenyl]azo]benzoic acid (DABCYL) group as the fluorescent acceptor to the N-terminus.
Main Results:
- Successfully synthesized a general fluorescent donor/acceptor peptide substrate.
- Demonstrated the method's applicability by creating substrates for renin and HIV proteinase.
- The synthesis strategy allows for the attachment of donor and acceptor groups while side chains remain protected.
Conclusions:
- The presented solid-phase synthesis scheme provides a robust and adaptable method for generating fluorescent peptide substrates.
- This approach facilitates the study of protease activity and the development of novel therapeutics.