Characterization and Expression Analysis of Receptor for Activated C Kinase from Silk-producing Insect Antheraea...

Area of Science:

• Insect immunology
• Molecular biology
• Biochemistry

Background:

• The receptor for activated C kinase (RACK) is a key scaffold protein regulating cellular functions.
• The specific role of RACK in the immune response of the wild silkworm Antheraea pernyi against pathogens is not well understood.

Purpose of the Study:

• To investigate the biological functions of RACK in Antheraea pernyi.
• To clone the RACK gene and analyze its expression patterns in response to immune challenges.

Main Methods:

• Gene cloning and sequence analysis of RACK.
• Recombinant protein expression and antibody production.
• SDS-PAGE, Western blot, ELISA, and real-time PCR for expression analysis.

Main Results:

• The Antheraea pernyi RACK gene sequence (1120 bp) showed high homology with insect RACK homologs.
• Recombinant RACK protein (36 kDa) was successfully expressed and an antibody was generated.
• RACK mRNA expression was highest in fat bodies and significantly induced by nucleopolyhedrovirus, E. coli, and Beauveria bassiana.

Conclusions:

• RACK is predominantly expressed in Antheraea pernyi fat bodies.
• RACK gene expression is inducible by various pathogens, indicating its potential involvement in the innate immune response of Antheraea pernyi.