In silico structural and functional characterization of Antheraea mylitta cocoonase

Area of Science:

• Biochemistry
• Molecular Biology
• Bioinformatics

Background:

• Cocoonase is a serine protease crucial for silk processing in insects.
• It dissolves sericin protein without damaging fibroin, enabling moths to emerge.
• Detailed characterization of cocoonase in Antheraea mylitta was previously lacking.

Purpose of the Study:

• To perform detailed in silico characterization of cocoonase from Antheraea mylitta.
• To predict secondary and tertiary structures, perform sequence alignment, and conduct phylogenetic analysis.
• To computationally validate the cocoonase enzyme.

Main Methods:

• Isolation of RNA and cDNA preparation from Antheraea mylitta head region.
• PCR amplification and sequencing of the cocoonase gene.
• In silico analysis using tools like ProtParam, I-TASSER, PROCHECK, TM-align, and MEGA X.

Main Results:

• A 377-bp cocoonase sequence was obtained and characterized in silico.
• Antheraea mylitta cocoonase showed 26% similarity to Antheraea pernyi cocoonase.
• Phylogenetic analysis indicated a close relationship between Antheraea mylitta and Antheraea pernyi cocoonase sequences.

Conclusions:

• Detailed in silico characterization of Antheraea mylitta cocoonase was achieved.
• The study confirms the presence of cocoonase in Antheraea mylitta.
• Cocoonase from Antheraea mylitta shows potential for cost-effective cocoon degumming in the silk industry.