Stabilized Human Cytomegalovirus GB Polypeptide Variants for Niche Applications

Publication ID: 24-11857622_0004_PTD
Published: October 28, 2025
Category:Specialized Variations & Niche Solutions

Legal Citation

pr1or.art Inc., “Stabilized Human Cytomegalovirus GB Polypeptide Variants for Niche Applications,” Published Technical Disclosure No. 24-11857622_0004_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857622_0004_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. 11,857,622.

Summary of the Inventive Concept

The inventive concept relates to engineered mutants of human cytomegalovirus glycoprotein B (gB) protein, adapted for specific, narrow markets or unique operational environments, such as high-security bioresearch facilities, disaster relief operations, extreme weather condition research, high-security biodefense applications, and high-altitude research stations.

Background and Problem Solved

The original patent disclosed engineered mutants of human cytomegalovirus glycoprotein B (gB) protein, but these mutants may not be suitable for use in specific, niche environments that require enhanced stability, sensitivity, or potency. The inventive concept addresses this limitation by adapting the engineered mutants for these unique operational environments.

Detailed Description of the Inventive Concept

The inventive concept comprises engineered mutants of human cytomegalovirus glycoprotein B (gB) protein, wherein the mutants comprise at least two amino acid mutations, including at least one engineered disulfide mutation. These mutants are designed to provide enhanced stability, sensitivity, or potency in specific, niche environments. For example, the mutants may be used in high-security bioresearch facilities, disaster relief operations, extreme weather condition research, high-security biodefense applications, and high-altitude research stations. The mutants may be administered as part of a vaccine composition, used in a kit for research, or incorporated into a device for detection.

Novelty and Inventive Step

The inventive concept is novel and non-obvious over the original patent because it adapts the engineered mutants for specific, niche environments, providing enhanced stability, sensitivity, or potency. The inventive concept's novelty lies in the specific combinations of mutations and environments, which are not anticipated by the original patent.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept may include different combinations of mutations, different environments, or different methods of administration. For example, the mutants may be used in other types of research stations, such as underwater or space-based research stations. The mutants may also be used in combination with other therapeutic agents or diagnostic tools.

Potential Commercial Applications and Market

The inventive concept has significant commercial potential in various industries, including biotechnology, pharmaceuticals, and research institutions. The adapted mutants may be used in a variety of applications, including vaccine development, diagnostic tools, and research reagents. The target market includes high-security bioresearch facilities, disaster relief organizations, extreme weather condition research institutions, high-security biodefense agencies, and high-altitude research stations.

CPC Classifications

SectionClassGroup
A A61 A61K39/245
C C07 C07K14/045
C C12 C12N7/00
C C12 C12N2710/16134

Field of Art

Virology, molecular biology, and protein engineering, with specific focus on cytomegalovirus glycoprotein modification and vaccine development. Requires advanced degree (PhD or equivalent) with expertise in protein structure, viral immunology, and recombinant protein techniques

Person of Ordinary Skill (PHOSITA) Profile

A skilled researcher with advanced training in viral protein engineering, capable of systematically modifying protein structures, understanding structure-function relationships, and applying rational design principles to enhance protein stability and immunogenic properties

Obviousness Rationale

A person skilled in the art would recognize that adapting the CMV glycoprotein B mutant for specific environmental conditions represents a predictable extension of the source patent's core innovation. The fundamental protein engineering techniques disclosed in US 11857622 provide a clear framework for developing targeted protein variants with enhanced stability. The PTD's niche applications represent logical, incremental modifications that would be obvious to a skilled researcher seeking to optimize viral protein performance in specialized contexts.

Obvious Combinations & Variations

Source Patent Element
Wild-type CMV gB protein with engineered disulfide mutations for increased stability
PTD Variation
Applying the stabilized protein variant to high-altitude or extreme environment research settings
Obviousness Reasoning
A PHOSITA would recognize that protein stability techniques are transferable across different research environments, making such adaptations a routine design choice
Source Patent Element
Prefusion-specific antibody binding and thermal shift assay techniques
PTD Variation
Developing specialized kits for extreme weather condition research using the mutant protein
Obviousness Reasoning
Combining known protein characterization methods with specific research context represents an obvious application of existing technological capabilities
Source Patent Element
Trimer configuration of engineered CMV gB protein
PTD Variation
Incorporating the protein variant into biodefense detection systems with enhanced sensitivity
Obviousness Reasoning
Leveraging the structural characteristics of the protein for specialized sensing applications would be a predictable modification for a skilled researcher
Source Patent Element
Mutations derived from Towne strain CMV gB sequence
PTD Variation
Developing vaccine compositions for disaster relief operations with enhanced protective characteristics
Obviousness Reasoning
Adapting viral protein variants for emergency medical applications represents a straightforward extension of existing protein engineering principles
Source Patent Element
Base protein engineering techniques for CMV glycoprotein B
PTD Variation
Creating specialized compositions with additional stabilizing agents and cryopreservatives
Obviousness Reasoning
Adding protective agents to maintain protein stability in extreme conditions is a well-known technique in protein formulation and would be obvious to a skilled researcher
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857622, the variations disclosed herein represent obvious modifications to the base cytomegalovirus glycoprotein B protein engineering techniques. A person having ordinary skill in the art would find the specific environmental adaptations and mutation combinations to be predictable extensions of the prior art, thereby rendering potential claims to such variations unpatentable under 35 U.S.C. ยง 103.

Original Patent Information

Patent NumberUS 11,857,622
TitleHuman cytomegalovirus GB polypeptide
Assignee(s)Pfizer Inc.