Targeted Agricultural Pest Control and Environmental Remediation using Shiga Toxin A Subunit Effector Polypeptides

Publication ID: 24-11857628_0002_PTD
Published: October 28, 2025
Category:New Applications & Use Cases

Legal Citation

pr1or.art Inc., “Targeted Agricultural Pest Control and Environmental Remediation using Shiga Toxin A Subunit Effector Polypeptides,” Published Technical Disclosure No. 24-11857628_0002_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857628_0002_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. 11,857,628.

Summary of the Inventive Concept

This inventive concept leverages the core technology of Shiga toxin A subunit effector polypeptides to develop novel applications in targeted agricultural pest control, environmental remediation, biomedical imaging, and veterinary diagnostics.

Background and Problem Solved

The original patent focused on cell-targeting molecules for site-specific conjugation, primarily for therapeutic applications. However, the limitations of this technology lie in its narrow scope, neglecting the potential of Shiga toxin A subunit effector polypeptides in other industries. This inventive concept addresses the need for targeted solutions in agriculture, environmental remediation, biomedical imaging, and veterinary diagnostics, offering a more comprehensive approach to utilizing this technology.

Detailed Description of the Inventive Concept

The new claims extend the original patent's technology to various industries, enabling the development of novel systems, methods, compositions, devices, and kits. For instance, the cell-targeting molecule can be designed to specifically bind to pest-specific biomolecules, facilitating targeted agricultural pest control. Similarly, the Shiga toxin effector polypeptide can be modified to target specific pollutant biomolecules, enabling environmental remediation. In biomedical imaging, the polypeptide can be engineered to emit a detectable signal upon binding to disease biomarkers. In veterinary diagnostics, the cell-targeting molecule can facilitate detection of disease-specific biomolecules.

Novelty and Inventive Step

The new claims introduce novel applications and use cases for Shiga toxin A subunit effector polypeptides, which were not originally considered in the original patent. The inventive step lies in the recognition of the potential of this technology in diverse industries and the development of innovative solutions to address specific problems in these fields.

Alternative Embodiments and Variations

Alternative embodiments may include varying the binding region to target different biomolecules, modifying the linker peptide to optimize conjugation, or using different Shiga toxin effector polypeptide modifications to achieve specific functions. Variations could also involve combining the cell-targeting molecule with other technologies, such as gene editing or nanotechnology, to enhance its capabilities.

Potential Commercial Applications and Market

The inventive concept has significant commercial potential in various industries, including agriculture, environmental remediation, biomedical imaging, and veterinary diagnostics. The market for targeted agricultural pest control alone is projected to reach $10 billion by 2025. The potential for environmental remediation, biomedical imaging, and veterinary diagnostics applications is substantial, with growing demand for innovative solutions in these fields.

CPC Classifications

SectionClassGroup
A A61 A61K45/06
A A61 A61K38/00
A A61 A61K38/164
A A61 A61K47/6829
C C07 C07K14/195
C C07 C07K14/25
A A61 A61K2039/6037
C C07 C07K2319/05
C C07 C07K2319/55

Field of Art

Biotechnology and molecular engineering, specifically protein engineering, cell-targeting molecules, and biomolecular conjugation techniques, with expertise in protein modification, site-specific targeting, and biomolecular interactions

Person of Ordinary Skill (PHOSITA) Profile

A PhD-level researcher with advanced training in protein engineering, molecular biology, and biotechnology, possessing expertise in protein modification techniques, understanding of structure-function relationships, and ability to design targeted molecular constructs

Obviousness Rationale

A person having ordinary skill would recognize that the source patent's Shiga toxin A subunit effector polypeptides provide a versatile molecular platform that can be readily adapted for multiple applications by modifying the binding region and linker peptide. The PTD's disclosed variations represent predictable extensions of the core technology, utilizing well-established protein engineering principles to redirect the cell-targeting molecule's specificity and function. The modifications demonstrate routine application of known protein design strategies to create targeted molecular systems for diverse industrial and biomedical purposes.

Obvious Combinations & Variations

Source Patent Element
Shiga toxin effector polypeptide with site-specific amino acid modifications
PTD Variation
Adapting the polypeptide for agricultural pest control by modifying binding region to target pest-specific biomolecules
Obviousness Reasoning
Routine protein engineering technique of altering binding specificity through targeted modifications, representing a predictable variation of known molecular targeting approach
Source Patent Element
Cell-targeting molecule with linker peptide facilitating site-specific conjugation
PTD Variation
Extending conjugation strategy to environmental remediation applications by targeting pollutant biomolecules
Obviousness Reasoning
Applying known site-specific conjugation principles to create novel molecular detection and remediation systems, representing a standard design approach in molecular engineering
Source Patent Element
Amino acid substitutions in Shiga toxin effector polypeptide (e.g., R248A, R251A)
PTD Variation
Introducing additional modifications to enable signal emission for biomedical imaging applications
Obviousness Reasoning
Predictable extension of existing protein modification techniques, utilizing well-established protein engineering principles to introduce functional variations
Source Patent Element
Specific binding region capable of targeting extracellular biomolecules
PTD Variation
Developing veterinary diagnostic kit with modified binding specificity for disease-specific biomolecules
Obviousness Reasoning
Routine application of molecular targeting strategies, representing a standard approach to creating diagnostic molecular tools
Source Patent Element
Modular design of cell-targeting molecule with interchangeable components
PTD Variation
Combining cell-targeting molecule with additional technologies like gene editing or nanotechnology
Obviousness Reasoning
Predictable combination of known molecular technologies, representing a standard approach to expanding molecular system capabilities
35 U.S.C. § 103 Summary: Pursuant to 35 U.S.C. ยง 103, the variations disclosed in this Published Technical Disclosure would have been obvious to a person having ordinary skill in the art at the time of invention, based on the teachings of US Patent 11857628. The disclosed modifications represent predictable extensions of the source patent's core technology, utilizing routine protein engineering techniques to create targeted molecular systems across diverse applications, thereby rendering potential patent claims obvious and unpatentable.

Original Patent Information

Patent NumberUS 11,857,628
TitleShiga toxin A subunit effector polypeptides, Shiga toxin effector scaffolds, and cell-targeting molecules for site-specific conjugation
Assignee(s)Molecular Templates, Inc.