Foldit

Understanding Protein Folding and the Foldit Project

• What are Proteins?

  • Proteins are essential "workhorses" in every living cell, performing functions like breaking down food, sending brain signals, and transporting nutrients.
  • They are composed of long, unbranched chains of amino acids.
  • There are 20 different types of amino acids, each with unique chemical properties (e.g., acidic, alkaline, hydrophilic, hydrophobic) determined by their "sidechains."

• The Folding Process

  • Proteins must fold into a specific, compact 3D shape to function correctly.
  • They naturally fold into their most stable energy state, similar to a ball rolling to the bottom of a hill.
  • Structure dictates function; for example, enzymes act like a "lock and key" to bind and break down specific molecules.

• The Role of Foldit

  • Foldit is a game that allows citizen scientists to help researchers solve complex protein folding puzzles.
  • Protein Design: Creating brand-new proteins to perform specific tasks, such as inhibiting viruses or breaking down plastic.
  • Small Molecule Design: Developing new drug compounds to target disease-related proteins.
  • Structure Solving: Determining the 3D shape of proteins to better understand how they function and how to treat associated diseases.
  • Human vs. Computer: The project tests whether human pattern-recognition and puzzle-solving skills can outperform existing computer algorithms.

• Disease and Biological Impact

  • HIV/AIDS: Research focuses on proteins like HIV-1 protease and reverse transcriptase that allow the virus to replicate.
  • Cancer: Investigates proteins like p53 that normally suppress tumor growth but can become damaged.
  • Alzheimer's: Studies how amyloid-beta peptide clumps in the brain contribute to the disease.
  • Biofuels: Aims to discover more efficient enzymes (cellulases) to break down plant material for fuel production.

• Examples of Proteins

  • Human/Animal: Amylase (digestion), Hemoglobin (oxygen transport), Fibrin (scabbing), Collagen (structure), Insulin (blood sugar regulation).
  • Nature/Viral: Photosystem I (photosynthesis), Luciferase (bioluminescence), Hemagglutinin (viral invasion).