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Related Concept Videos

Conservation of Protein Domains02:26

Conservation of Protein Domains

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
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The Buckingham Pi theorem provides a structured method to simplify fluid dynamics problems by reducing complex systems of variables to dimensionless terms.
Membrane Domains01:18

Membrane Domains

The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the anterior...
Pinching-off of Coated Vesicles01:32

Pinching-off of Coated Vesicles

Vesicle budding is orchestrated by distinct cytosolic proteins such as adaptor proteins, coat proteins, and GTPases. To initiate vesicle budding, membrane-bending proteins containing crescent-shaped BAR domains bind to the lipid heads in the bilayer and distort the membrane to form a protein-coated vesicle bud. Adaptors proteins such as AP2 for clathrin-coated vesicles can nucleate on the deformed membrane. Finally, coat proteins such as clathrin or COPI and COPII assemble into a coat forming...
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...

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A Bilingual Computational Workflow for Identifying Potential PLK1 Inhibitors in American Sign Language and English
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Pinning down the polo-box domain.

Kyung S Lee1, Jeffrey R Idle

  • 1Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA. kyunglee@mail.nih.gov

Chemistry & Biology
|May 17, 2008
PubMed
Summary
This summary is machine-generated.

Researchers identified Poloxin, a small molecule that inhibits the polo-box domain (PBD) of Polo-like kinase 1 (Plk1). This discovery offers a potential new avenue for anticancer drug development targeting Plk1.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • Polo-like kinase 1 (Plk1) is a crucial regulator of cell division.
  • Plk1's role in cell cycle progression makes it a promising target for cancer therapy.

Purpose of the Study:

  • To identify small molecules that can inhibit Plk1 activity.
  • To investigate the mechanism of action of identified inhibitors.

Main Methods:

  • Screening for small molecules that interact with Plk1.
  • Characterization of the interaction between the small molecule and Plk1's polo-box domain (PBD).

Main Results:

  • Identification of a novel small molecule inhibitor named Poloxin.
  • Poloxin was found to interfere with the function of the Plk1 PBD.

Conclusions:

  • Poloxin represents a potential therapeutic agent for anticancer treatments.
  • Targeting the Plk1 PBD with small molecules is a viable strategy for developing new cancer drugs.