Structural mechanism of bacteriophage lambda tail's interaction with the bacterial receptor

Area of Science:

• Microbiology
• Structural Biology
• Virology

Background:

• Bacteriophage lambda infection begins with tail-mediated binding to bacterial receptors.
• The interaction between bacteriophage lambda and its receptor LamB is crucial but not fully understood at a molecular level.

Purpose of the Study:

• To elucidate the molecular mechanism of bacteriophage lambda infection initiation.
• To determine the high-resolution structures of bacteriophage lambda tail complexed with the LamB receptor.

Main Methods:

• High-resolution cryo-electron microscopy (cryo-EM).
• Structural analysis of bacteriophage lambda tail complexed with Shigella sonnei LamB receptor.

Main Results:

• Determined cryo-EM structures of bacteriophage lambda tail complexed with LamB receptor and central tail fiber.
• Revealed substantial conformational changes in the phage lambda tail tip upon LamB binding.
• Detailed the complex processes triggering phage infection.

Conclusions:

• The study provides detailed structural insights into bacteriophage lambda infection initiation.
• Understanding lambda-bacterial interactions is significant for microbiology and therapeutic development.