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The rules of disorder or why disorder rules
1MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, United Kingdom. jgsponer@mrc-lmb.cam.ac.uk
Progress in Biophysics and Molecular Biology
|April 7, 2009
Summary
Over 30% of eukaryotic proteins are intrinsically unstructured proteins (IUPs), lacking fixed 3D structures yet performing vital functions. Their unique properties are key to cellular regulation and offer potential as drug targets.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- A significant portion of eukaryotic proteins (>30%) are intrinsically unstructured proteins (IUPs), challenging the traditional structure-function paradigm.
- IUPs play crucial roles in intracellular signaling, regulation, and act as central interaction hubs in protein networks.
Purpose of the Study:
- To review the functional and structural properties of intrinsically unstructured proteins (IUPs).
- To explore how these properties contribute to cellular organization, regulation, and potential as drug targets.
Main Methods:
- Literature review of functional and structural characteristics of IUPs.
- Analysis of IUP properties including post-translational modifications, scaffolding mechanisms, and conformational dynamics.
Main Results:
- IUPs exhibit facilitated regulation through post-translational modifications.
- They employ mechanisms like "fly-casting" and coupled folding-binding for scaffolding and recruitment.
- Conformational variability and adaptability are key features of IUPs.
Conclusions:
- The unique properties of IUPs enable key roles in cellular organization and regulation.
- These characteristics make IUPs attractive targets for therapeutic drug development.
- IUPs facilitate combinatorial regulation and component re-use across multiple biological processes.
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