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Human papillomavirus (HPV) L1 is the major capsid protein that self-assembles into virus-like particles (VLPs), which are the basis for all current prophylactic HPV vaccines. As the primary surface antigen, L1 induces high-titer, type-restricted neutralizing antibodies that protect against HPV infection. Recombinant L1 VLPs are essential tools for vaccine development, serology, immunogenicity assessment, and antiviral screening.
L1 is a 55-60 kDa protein that forms pentameric capsomeres; 72 pentamers assemble into a T=7 icosahedral VLP. L1 is highly immunogenic and contains type-specific conformational epitopes that are the targets of neutralizing antibodies. HPV L1 plays key roles in:
Over 200 HPV types exist, with types 16, 18, 31, 33, 45, 52, 58 classified as high-risk for cervical cancer. L1 sequence diversity is high, making type-specific selection critical for vaccine and serological studies.
Target Name: Major capsid protein L1
Synonyms: HPV L1, L1 capsid protein, major structural protein
UniProt ID (example HPV16 L1): P03101
Target Class: Viral structural protein; capsid protein; vaccine antigen
Recombinant HPV L1 VLPs are used predominantly in vaccine development, serosurveillance, and antibody characterization.
1. Vaccine antigen and potency testing – Quantitative assessment of VLP integrity and immunogenicity
2. Serological assays – ELISA, multiplex assays (e.g., Luminex) for type-specific antibody responses post-vaccination or infection
3. Neutralization assays – Pseudovirion-based neutralization (PBNA) using L1/L2 pseudovirions
4. Antibody screening and epitope mapping – Identification of neutralizing versus non-neutralizing antibodies
5. Immunogenicity studies – Preclinical and clinical evaluation of vaccine candidates
6. Virus-cell interaction studies – Heparan sulfate binding and entry inhibition
Recombinant L1 VLPs are most effective in immunoassays and functional neutralization workflows:
Because L1 forms VLPs, it is not suitable for intracellular enzymatic assays. For oncoprotein studies, refer to HPV E6/E7 products.
Submit an inquiry or email inquiry@betalifesci.com for a customization request or bulk order quote.
Fast turnaround production is available at a affordable price point if none of our catalog products fits your desire specifications.
Selecting the right HPV L1 protein depends on your assay type, HPV type, VLP assembly state, and intended use. Properly folded, assembled VLPs are essential for conformational epitope recognition.
Selection depends on your experimental goal:
Custom L1 constructs are often justified when:
If your project involves vaccine evaluation, serosurveillance, antibody discovery, immunogenicity testing, or neutralization assays, selecting the right HPV type, assembly state, and expression system is essential for reliable results.
We can help you:
Submit your project details for expert evaluation. Our technical team will review your application and recommend the most suitable HPV L1 protein format for your research.
Qualified projects may be eligible for discounted or free samples for validation.
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