Creative Biolabs is offering the most comprehensive services for antibody development projects. With strict regulation and effective execution, we are dedicated to providing the most valuable solutions to complete your projects.
HighlightsCreative Biolabs is offering the most comprehensive services for antibody development projects. With strict regulation and effective execution, we are dedicated to providing the most valuable solutions to complete your projects.
HighlightsCreative Biolabs has established a broad range of platforms for developing novel antibodies or equivalents. These cutting-edge technologies enable our scientists to meet your demands from different aspects and tailor the most appropriate solution that contributes to the success of your projects.
HighlightsWith deep understanding in antibody-related realms and extensive project experience, Creative Biolabs offers a variety of references to help you learn more about our capacities and achievements, including infographic, flyer, case study, peer-reviewed publications, and all kinds of knowledge that can assist your projects. You are also welcome to contact us directly for more specific solutions.
HighlightsGet a real taste of Creative Biolabs, one of the most professional custom service providers in the world. We are committed to providing highly customized comprehensive solutions with the best quality to advance your projects.
Highlights
The robust exterior of the T4 capsid is fortified by "decoration" proteins, which are thought to confer survival advantages in diverse environmental conditions. Among these, the Highly Immunogenic Outer Capsid protein (HOC) and the Small Outer Capsid protein (SOC) are the primary decorative components. Crucially, the HOC protein is non-essential for the fundamental T4 capsid assembly, a characteristic that provides the necessary molecular latitude for its exploitation in display technology.
HOC itself is structured as a string of four distinct domains. The N-terminal three are classified as immunoglobulin (Ig)-like domains, while the C-terminus holds a non-Ig domain (residues 305 to 404 in RB49 Hoc). The C-terminal domain is recognized as critical for the protein's high-affinity interaction and binding to the T4 capsid structure, a feature conserved across T4-like phages. Furthermore, the first three domains exhibit structural and characteristic similarities to cell-bound eukaryotic immunoglobulin domains, suggesting a deep evolutionary connection: a possible derivation from a common ancestral protein rather than simple convergent evolution. This abundance of Ig-like domains on the phage surface may inherently facilitate interactions with complex biological surfaces, potentially including eukaryotic cell membranes, opening avenues for targeted delivery applications.
The HOC Display system capitalizes on the non-essential nature of HOC for virion formation and its high-affinity binding to the pre-formed capsid. The HOC monomer possesses two functional modules: a capsid binding module, encompassing domains 1 and 4, and a solvent exposure module, consisting of domains 2 and 3. In contrast to the SOC display mechanism, which typically involves fusion to the SOC gene in vivo, the HOC system utilizes a unique cloning site at the 5' end of the hoc gene, coupled with an in vitro packaging protocol. This approach allows for the display of a foreign protein fused to HOC, which is subsequently assembled onto the capsid surface after the phage particles have been formed, offering precise control over the display process and copy number.
Unlock the Potential of HOC Display for Your Project. Request a Quote Today.
The HOC display system presents distinct advantages over conventional phage display methodologies, particularly those based on filamentous phages:
The T4 phage, being a lytic phage, possesses a highly stable, complex structure that is significantly more robust than the flexible, rod-like filamentous phages. This enhanced stability is beneficial for screening under harsh conditions, such as high temperatures or varying pH levels, which may be encountered in industrial or environmental applications.
The T4 capsid accommodates numerous copies of the HOC protein, allowing for the display of target molecules at a high valency. This multivalent presentation significantly increases the apparent avidity of the displayed library members, which is critical for the isolation of binders against low-abundance or weakly-binding targets.
The reliance on in vitro packaging and assembly differentiates the HOC system. This allows for the separate production of the T4 genomic DNA (packaging extract) and the foreign protein-HOC fusion. The target DNA is cloned and expressed in E. coli, and the resulting HOC fusion protein is purified. Subsequently, the HOC fusion protein is added to the in vitro packaging mix, where it binds to the pre-assembled phages. This separation of production steps simplifies the engineering of complex libraries and avoids the toxicity issues sometimes associated with the high-level in vivo expression of foreign proteins in the host bacterium.
Due to the relatively large size and structural tolerance of the T4 capsid, the HOC site often allows for the display of significantly larger and more complex foreign proteins, including multi-domain antibodies and protein scaffolds, which are often poorly tolerated by filamentous phage systems.
Start Your Custom HOC Display Journey — Talk to Our Experts.
At Creative Biolabs, our comprehensive knowledge and extensive experience in engineering and application of phage display are central to our binder discovery services. We have refined the T4-based HOC display system into a proprietary platform for the generation of highly diverse libraries and the selection of novel, high-affinity molecular binders. Our commitment to applying formal, cutting-edge molecular biology techniques ensures that our T4 HOC Display platform meets the exacting standards of contemporary biopharmaceutical development.
Transform Your Discovery Pipeline with HOC Display. Ask for a Proposal.
Leveraging the advantages of the phage display system and our expertise, Creative Biolabs offers a comprehensive suite of services designed to address the most challenging aspects of therapeutic and diagnostic molecule generation. Our services provide end-to-end solutions, from library construction to the discovery of functional binders.
We invite you to explore our advanced phage display based binder discovery services, which include:
Phage Display Library Construction
Generation of high-complexity, high-diversity synthetic or immune-derived libraries displayed on the phage surface, maximized by the system's ability to display large, complex inserts.
Phage Display Library Screening
High-throughput biopanning and sophisticated selection strategies tailored to the target molecule, including competitive elution and subtractive panning.
Phage Display-based Monoclonal Antibody Discovery
Isolating single-chain variable fragments scFv or Fab fragments with superior affinity and specificity.
Phage Display-based Peptide Discovery
Identifying short peptide sequences that bind to specific targets, useful as homing devices or inhibitors.
Phage Display-based Stable Binder Discovery
Selection of molecules resistant to thermal denaturation or enzymatic degradation, leveraging the inherent stability.
Phage Display-based pH-Sensitive Binder Discovery
Isolation of binders engineered to exhibit differential binding across varying pH values, critical for targeted release in acidic environments (e.g., endosomes or tumor microenvironments).
Phage Display-based Internalizing Antibody Discovery
Screening for binders capable of triggering receptor-mediated endocytosis, facilitating the delivery of payloads into target cells.
Ready to Accelerate Your Molecule Screening? Contact Us for a Consultation.
Empower Your R&D with Advanced HOC Display Technology. Get in Touch.
All listed services and products are For Research Use Only. Do Not use in any diagnostic or therapeutic applications.
