Enhanced Therapeutic Bacteriocins with Improved Efficacy and Stability

Publication ID: 24-11857606_0006_PTD
Published: October 28, 2025
Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Enhanced Therapeutic Bacteriocins with Improved Efficacy and Stability,” Published Technical Disclosure No. 24-11857606_0006_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857606_0006_PTD
This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,857,606.

Summary of the Inventive Concept

The present invention provides novel therapeutic bacteriocin compositions and methods with enhanced receptor-mediated translocation functionality, improved killing efficacy, and increased stability, offering a more effective and efficient solution for reducing microbial colonies and treating bacterial infections.

Background and Problem Solved

The original patent disclosed therapeutic bacteriocins with antimicrobial properties, but had limitations in terms of targeting multiple bacterial strains, killing efficacy, and stability. The present invention addresses these limitations by engineering bacteriocins with enhanced receptor-mediated translocation domains, improved cargo domains, and modified sequences to minimize degradation and immunogenicity.

Detailed Description of the Inventive Concept

The inventive concept comprises bacteriocin-based antimicrobial compositions with enhanced stability and shelf-life, engineered to target multiple Gram-negative bacteria strains simultaneously. The bacteriocins are designed with modified receptor-mediated translocation domains to reduce degradation by host enzymes and minimize immune system recognition. The compositions can be used to treat bacterial infections, prevent biofilm formation, and reduce microbial colonies. The inventive concept also encompasses methods for using these compositions, including methods for preventing biofilm formation and treating bacterial infections.

Novelty and Inventive Step

The new claims introduce novel and non-obvious features, including the use of bacteriocins with enhanced receptor-mediated translocation functionality, the combination of bacteriocins with distinct receptor-mediated translocation domains, and the modification of receptor-mediated translocation domains to reduce degradation and immunogenicity. These features provide a significant improvement over the original patent and offer a more effective and efficient solution for reducing microbial colonies and treating bacterial infections.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept could include the use of different bacteriocin sequences, varying the receptor-mediated translocation domains, or incorporating additional cargo domains. The inventive concept could also be implemented using different delivery mechanisms, such as topical application or oral administration.

Potential Commercial Applications and Market

The inventive concept has significant commercial potential in the fields of pharmaceuticals, biotechnology, and healthcare. The enhanced therapeutic bacteriocin compositions and methods could be used to treat a wide range of bacterial infections, including those caused by multidrug-resistant bacteria, and could provide a more effective and efficient solution for reducing microbial colonies and preventing biofilm formation.

CPC Classifications

SectionClassGroup
A A61 A61K38/43
A A01 A01N63/10
A A01 A01N63/50
C C07 C07K14/21
C C07 C07K14/26
C C12 C12N9/2462

Field of Art

Antimicrobial biotechnology, focusing on bacteriocin design, protein engineering, and therapeutic compositions for targeting bacterial infections, particularly Gram-negative bacteria

Person of Ordinary Skill (PHOSITA) Profile

A PhD-level microbiologist or protein engineer with expertise in bacteriocin design, molecular biology techniques, protein modification strategies, and antimicrobial therapeutic development

Obviousness Rationale

A PHOSITA would recognize that the PTD's modifications to bacteriocin receptor-mediated translocation domains represent predictable engineering variations within the known design space of therapeutic bacteriocins. The disclosed enhancements in stability, targeting, and reduced immunogenicity are logical extensions of standard protein engineering approaches applied to the source patent's foundational bacteriocin technology. These variations would be considered routine optimization techniques for improving antimicrobial protein therapeutics.

Obvious Combinations & Variations

Source Patent Element
Bacteriocin with specific receptor-mediated translocation domain from SEQ ID NO:10
PTD Variation
Engineering modified receptor-mediated translocation domains to reduce host enzyme degradation
Obviousness Reasoning
Protein stability optimization is a standard technique in therapeutic protein design, and a PHOSITA would find it obvious to modify domains to enhance enzymatic resistance using known protein engineering strategies
Source Patent Element
Method of killing specific bacterial strains like Klebsiella pneumoniae and Escherichia coli
PTD Variation
Expanding targeting to multiple Gram-negative bacteria strains simultaneously
Obviousness Reasoning
Broadening antimicrobial specificity is a predictable design goal, and a PHOSITA would recognize multiple approaches to achieve broader bacterial targeting through rational protein modification
Source Patent Element
Bacteriocin with defined receptor binding and translocation domains
PTD Variation
Combining bacteriocins with distinct receptor-mediated translocation domains
Obviousness Reasoning
Modular protein design and domain combination are well-established techniques in protein engineering, making such combinatorial approaches an obvious extension of known methodologies
Source Patent Element
Bacteriocin with specific amino acid sequence segments
PTD Variation
Reducing immunogenicity by modifying receptor-mediated translocation domains
Obviousness Reasoning
Minimizing immune recognition is a standard goal in therapeutic protein development, and a PHOSITA would find systematic domain modifications to reduce immunogenicity an obvious design approach
Source Patent Element
Therapeutic bacteriocin composition for bacterial killing
PTD Variation
Enhanced stability and shelf-life through domain engineering
Obviousness Reasoning
Improving protein stability is a predictable and routine optimization strategy in therapeutic protein design, representing a logical and obvious extension of existing technology
35 U.S.C. § 103 Summary: Pursuant to 35 U.S.C. ยง 103, the variations disclosed in the instant publication would have been obvious to a person having ordinary skill in the art at the time of invention, with a reasonable expectation of success, when considered in light of US Patent 11857606. The claimed modifications represent predictable engineering variations within the known design space of bacteriocin-based antimicrobial compositions, employing routine optimization techniques well-understood by skilled practitioners in the field of therapeutic protein design.

Original Patent Information

Patent NumberUS 11,857,606
TitleTherapeutic bacteriocins
Assignee(s)BACTOCLEAR HOLDINGS PTE. LTD.