Related Experiment Video
Updated: Jun 27, 2025

X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050
Published on: May 13, 2020
Cyclodipeptide oxidase is an enzyme filament
Michael P Andreas1, Tobias W Giessen2
1Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
Researchers characterized the Streptomyces noursei enzyme AlbAB, a cyclodipeptide oxidase (CDO). This megadalton enzyme filament is crucial for albonoursin antibiotic biosynthesis and its activity depends on filament formation.
Area of Science:
- Biochemistry
- Molecular Biology
- Enzymology
Background:
- Modified cyclic dipeptides are secondary metabolites with significant pharmacological potential.
- Cyclodipeptide oxidases (CDOs) play a role in modifying these compounds.
Purpose of the Study:
- To structurally characterize the Streptomyces noursei enzyme AlbAB, a cyclodipeptide oxidase.
- To understand the role of AlbAB in the biosynthesis of the antibiotic albonoursin.
Main Methods:
- Structural characterization of the AlbAB enzyme complex.
- Analysis of enzyme activity and dependence on filament formation.
Main Results:
- AlbAB is a megadalton heterooligomeric enzyme filament with covalently bound flavin mononucleotide cofactors.
- The enzyme filament comprises alternating AlbA and AlbB dimers, essential for its activity.
- Conserved AlbA-AlbB interactions suggest other CDO-like enzymes may also form filaments.
Conclusions:
- The structural and functional characterization of AlbAB provides insights into CDO mechanisms.
- Understanding AlbAB filament formation is key for its future applications in biocatalysis and chemoenzymatic synthesis.
More Related Videos
08:31Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
Published on: October 3, 2018
08:02Benchtop Immobilized Metal Affinity Chromatography, Reconstitution and Assay of a Polyhistidine Tagged Metalloenzyme for the Undergraduate Laboratory
Published on: August 23, 2018
Related Concept Videos
Actin Filament Depolymerization
In F-actin, the ADF/cofilin proteins...
Mechanism of Filopodia Formation
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Disassembly of Intermediate Filaments
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
Protein Folding
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Amyloid Fibrils
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Assembly of Cytoskeletal Filaments