Cytoskeleton Overview

Introduction

• Cytoskeleton: A dynamic network of filamentous proteins.
• Functions:
  • Provides cell shape.
  • Ensures internal organization.
  • Offers mechanical support for movement.

Types of Protein Filaments

Microtubules

• Structure: Stiff, hollow tubes.
• Function:
  • Anchor other organelles.
  • Serve as tracks for guiding the movement of vesicles and cell components.

Actin Filaments

• Structure: Thin, flexible filaments.
• Formation: Cross-linked bundles and branching networks.
• Importance:
  • Crucial for cell movement.
  • Central to the contractile engine in muscles.
  • Provides mechanical force for cell movement at the plasma membrane.

Dynamic Nature

• Filaments are built from subunits.
• Can rapidly assemble and disassemble.
• Allows for flexible formation and dismantling of cytoskeletal structures as needed.