Antimicrobial Peptide Sequences for Resistant Bacteria and Biofilms
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Solution Overview
Problem
The increasing antibiotic resistance in pathogens such as ESKAPE bacteria makes existing treatments difficult, and there is a need for alternative antimicrobial agents that are effective against these pathogens and can prevent biofilm formation.
Innovation Solution
Development of specific antimicrobial peptides, such as those based on the PLNC8 β sequence, optimized for stability and activity, which can be used alone or in combination with antibiotics to combat resistant bacteria and biofilms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antibiotics are used to treat bacterial infections, then bacterial infections can be treated effectively, but antibiotic resistance develops making treatments difficult
Solution Approach 1:
The invention segments the antibacterial function from traditional antibiotics by using completely different molecular structures (peptides with 5-50 amino acids) that operate through alternative mechanisms (membrane disruption rather than metabolic interference), thereby bypassing antibiotic resistance while maintaining treatment effectiveness
Solution Approach 2:
The invention changes the fundamental parameters of the antimicrobial agent from small-molecule antibiotics to peptide-based structures with specific physical properties (amphipathic character, cationic charge, alpha-helical conformation) that enable membrane disruption activity against resistant bacteria including ESKAPE pathogens
2Stability of the object's composition
If antimicrobial peptides are designed to be stable against heat and pH changes, then peptide stability is improved, but maintaining bactericidal activity against a wide range of microbes becomes challenging
Solution Approach 1:
The invention applies local quality by creating amphipathic peptides with distinct regional characteristics: hydrophobic regions for membrane insertion, cationic regions for electrostatic attraction to bacterial surfaces, and structured alpha-helical regions for stable conformation. This localized functional differentiation enables both stability and broad-spectrum activity
Solution Approach 2:
The invention creates composite peptide structures combining multiple amino acid properties (hydrophobic, hydrophilic, cationic, structured) within a single 5-50 residue sequence, forming a multifunctional molecule that simultaneously achieves thermal/pH stability and broad antimicrobial activity against diverse pathogens
3Reliability
If peptides are used to permeabilize bacterial membranes, then bactericidal activity is enhanced, but toxicity towards eukaryotic cells may increase
Solution Approach 1:
The invention applies the inversion principle by targeting the bacterial membrane itself rather than intracellular components, using the membrane's inherent negative charge and structural differences as the primary target. This external targeting approach enhances bactericidal activity while reducing interference with eukaryotic cellular processes
Solution Approach 2:
The invention uses local quality by designing peptides with specific charge distributions and hydrophobicity patterns that preferentially interact with bacterial membrane components (phospholipids, lipopolysaccharides) rather than eukaryotic membrane components, enabling selective toxicity through localized chemical property matching
Data Source
AI summary
The present document is directed to an antimicrobial peptide, pharmaceutical and non-pharmaceutical compositions comprising an amino acid sequence as set forth in SEQ ID NO: 1 or SEQ ID NO: 2 or an amino acid sequence having at least 85% or at least 90%, sequence identity to SEQ ID NO: 1 or SEQ ID NO: 2, and medical and non-medical use the antimicrobial peptide