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Related Concept Videos

Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The Unfolded Protein Response01:37

The Unfolded Protein Response

The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
Export of Misfolded Proteins out of the ER01:32

Export of Misfolded Proteins out of the ER

After folding, the ER assesses the quality of secretory and membrane proteins. The correctly folded proteins are cleared by the calnexin cycle for transport to their final destination, while misfolded proteins are held back in the ER lumen. The ER chaperones attempt to unfold and refold the misfolded proteins but sometimes fail to achieve the correct native conformation. Such terminally misfolded proteins are then exported to the cytosol by ER-associated degradation or ERAD pathway for...

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Intrinsically disordered proteins: administration not executive.

Mike P Williamson1, Jennifer R Potts

  • 1Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, U.K. m.williamson@sheffield.ac.uk

Biochemical Society Transactions
|September 20, 2012
PubMed
Summary
This summary is machine-generated.

Intrinsically disordered proteins (IDPs) are crucial for cellular regulation, acting as administrative hubs. Their unique binding properties make them promising targets for pharmaceutical development.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Genomics

Background:

  • Intrinsically disordered proteins (IDPs) are prevalent in eukaryotic genomes.
  • IDPs play vital regulatory roles within the cell.
  • Unlike folded proteins with executive functions, IDPs perform essential administrative roles, coordinating cellular processes.

Purpose of the Study:

  • To elucidate the functional significance of intrinsically disordered proteins (IDPs) in cellular regulation.
  • To highlight the unique binding characteristics of IDPs.
  • To establish IDPs as viable targets for pharmaceutical intervention.

Main Methods:

  • Bioinformatic analysis of eukaryotic genomes to identify IDP prevalence.
  • Biochemical assays to characterize the binding properties of IDPs.
  • Comparative analysis of IDP functions versus folded globular proteins.

Main Results:

  • IDPs are common in eukaryotic genomes and possess regulatory functions.
  • While disordered, IDPs exhibit specific, albeit weak, binding capabilities.
  • IDPs remain partially disordered even when bound to targets.
  • IDPs are essential for coordinating cellular 'executive' functions.

Conclusions:

  • Intrinsically disordered proteins (IDPs) are critical for cellular coordination and regulation.
  • The unique properties of IDPs, including their partial disorder and specific binding, underscore their administrative role.
  • IDPs represent a promising class of targets for pharmaceutical development due to their regulatory importance.