Study on the Interaction of Algal Peptides on Virulence Factors of Helicobacter pylori: In Silico Approach

Area of Science:

• Biotechnology
• Marine Biology
• Computational Biology

Background:

• Helicobacter pylori infection is highly prevalent in Asia, causing peptic ulcers and increasing gastric cancer risk.
• Virulence factors like CagA, VacA, and HtrA in H. pylori strains are key contributors to severe complications.
• Targeting these virulence factors presents a therapeutic strategy to combat H. pylori infections.

Purpose of the Study:

• To investigate the antagonistic interactions between algal peptides and H. pylori virulence factors.
• To identify potential peptide-based inhibitors for H. pylori through in silico analysis.
• To explore novel treatments for peptic ulcers and gastric cancer prevention.

Main Methods:

• In silico analysis was employed to study interactions between eight algal peptides and H. pylori virulence factors.
• Molecular docking using the C-Docker algorithm was performed to assess binding affinities.
• Binding energies of peptide-virulence factor complexes were calculated.

Main Results:

• A peptide from the green alga Tetradesmus sp. demonstrated significant activity against CagA, VacA, and HtrA.
• Effective interactions included hydrogen bonds, van der Waals, and electrostatic forces, with mild π-hydrophobic bindings.
• Libdock energy scores for CagA, VacA, and HtrA complexes were 175.625, 158.603, and 89.397 kcal/mol, respectively.

Conclusions:

• Algal peptides, particularly from Tetradesmus sp., show potential as effective inhibitors of H. pylori virulence factors.
• These findings suggest a promising avenue for developing new therapeutic agents against H. pylori infections.
• This research paves the way for novel treatments targeting peptic ulcers and preventing H. pylori-associated gastric cancer.