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Production of Disulfide-stabilized Transmembrane Peptide Complexes for Structural Studies
Published on: March 6, 2013
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ScrepYard: An online resource for disulfide-stabilized tandem repeat peptides
Junyu Liu1, Michael Maxwell1, Thom Cuddihy2,3
1Centre for Advanced Imaging, The University of Queensland, St. Lucia, Queensland, Australia.
Protein Science : a Publication of the Protein Society
|January 16, 2023
Summary
Researchers developed ScrepYard, an online tool to identify and characterize secreted cysteine-rich repeat-proteins (SCREPs). This resource aids in discovering naturally multivalent ligands and understanding their unique domain structures.
Area of Science:
- Biochemistry
- Structural Biology
- Bioinformatics
Background:
- Receptor avidity via multivalency is crucial for ligand function but difficult to engineer synthetically.
- Naturally occurring bivalent venom peptides with tandemly repeated domains offer insights into multivalency.
- Secreted cysteine-rich repeat-proteins (SCREPs) represent a class of such multivalent biomolecules.
Purpose of the Study:
- To introduce ScrepYard, an online resource for identifying and characterizing SCREPs.
- To analyze the structural features of SCREPs, particularly domain arrangements and linker regions.
- To demonstrate ScrepYard's utility as a virtual screening tool for discovering novel multivalent peptides.
Main Methods:
- Development of the ScrepYard online database.
- Bioinformatic analysis of sequences within ScrepYard.
- Virtual screening of ScrepYard for potential ligands.
- Experimental validation of a identified serine protease inhibitor using enzyme assays.
Main Results:
- Two-domain tandem repeats are the most common SCREP architecture.
- SCREP interdomain linkers are rich in proline and amino acids with short/polar sidechains.
- ScrepYard successfully identified a novel serine protease inhibitor with confirmed activity.
Conclusions:
- ScrepYard is a valuable tool for identifying and characterizing SCREPs.
- The structural analysis provides insights into the design principles of natural multivalency.
- ScrepYard facilitates the discovery of new bioactive peptides with potential therapeutic applications.
