A novel fragment of antigen binding (Fab) surface display platform using glycoengineered Pichia pastoris.

12:52 EDT 31st March 2015 | BioPortfolio

Summary of "A novel fragment of antigen binding (Fab) surface display platform using glycoengineered Pichia pastoris."

A fragment of antigen binding (Fab) surface display system was developed using a glycoengineered Pichia pastoris host strain genetically modified to secrete glycoproteins with mammalian mannose-type Man(5)GlcNAc(2) N-linked glycans. The surface display method described here takes advantage of a pair of coiled-coil peptides as the linker while using the Saccharomyces cerevisiae Sed1p GPI-anchored cell surface protein as an anchoring domain. Several Fabs were successfully displayed on the cell surface using this system and the expression level of the displayed Fabs was correlated to that of secreted Fabs from the same glycoengineered host in the absence of the cell wall anchor. Strains displaying different model Fabs were mixed and, through cell sorting, the strain displaying more expressed Fab molecule or the strain displaying the Fab with higher affinity for an antigen was effectively enriched by FACS. This novel yeast surface display system provides a general platform for the display of Fab libraries for affinity and/or expression maturation using glycoengineered Pichia.


Journal Details

This article was published in the following journal.

Name: Journal of immunological methods
ISSN: 1872-7905
Pages: 159-65


PubMed Articles [16973 Associated PubMed Articles listed on BioPortfolio]

Improved Fab Presentation on Phage Surface with the Use of Molecular Chaperone Co-Plasmid System.

The low presentation efficiency of Fab (fragment antigen binding) fragments during phage display is largely due to the complexity of disulphide bond formation. This can result in the presentation of F...

Construction of pH-sensitive Her2-binding IgG1-Fc by directed evolution.

For most therapeutic proteins, a long serum half-life is desired. Studies have shown that decreased antigen binding at acidic pH can increase serum half-life. In this study we aimed to investigate whe...

Bi-specific antibodies with high antigen-binding affinity identified by flow cytometry.

Using conventional approaches, the antigen-binding affinity of a novel format of bi-specific antibody (BsAb) cannot be determined until purified BsAb is obtained. Here, we show that new lipoprotein A ...


Outer membrane vesicles (OMVs) are spherical nanoparticles that naturally shed from Gram-negative bacteria. They are rich in immunostimulatory proteins and lipopolysaccharide but do not replicate, whi...

Autotransporter-based antigen display in bacterial ghosts.

Bacterial ghosts are empty cell envelopes of Gram-negative bacteria that can be used as vehicles for antigen delivery. Ghosts are generated by releasing the bacterial cytoplasmic contents through a ch...

Clinical Trials [1184 Associated Clinical Trials listed on BioPortfolio]

Long Term Follow-Up Study 16-20 Years After Hepatitis B Vaccination in Newborns of Mothers Who Were Seropositive for Hepatitis B Envelope Antigen (HBeAg) & Hepatitis B Surface Antigen (HBsAg)

This study is performed to evaluate the persistence of anti-hepatitis B surface antigen (HBs) antibodies up to 16, 17, 18, 19 and 20 years after administration of the first dose of the stu...

Study of Uveitic Macular Edema Treated With Ranibizumab or Steroids

This is a pilot study to investigate the safety and efficacy of intravitreally administered ranibizumab (Lucentis) compared to steroid injection for the treatment of macular edema due to c...

Immunogenicity of a Surface Antigen, Inactivated Influenza Vaccine Formulation 2007-2008

Due to antigenic changes of influenza viruses, the virus strains used in influenza vaccines are adjusted every year according to WHO and CPMP recommendations. Immunogenicity and tolerabili...

Trial of Bi-shRNA-furin and Granulocyte Macrophage Colony Stimulating Factor (GMCSF) Augmented Autologous Tumor Cell Vaccine for Advanced Cancer

Autologous FANG vaccine expresses rhGMCSF and bi-shRNAfurin from the FANG plasmid. The GMCSF protein is a potent stimulator of the immune system, recruiting immune effectors to the site o...

Evaluation of Drug Display in Critical Care Setting

To assess the clinical utility of the graphical medication monitor, results of the anesthetics for which the display was present will be compared to the results of the anesthetics in which...

Medical and Biotech [MESH] Definitions

Univalent antigen-binding fragments composed of one entire IMMUNOGLOBULIN LIGHT CHAIN and the amino terminal end of one of the IMMUNOGLOBULIN HEAVY CHAINS from the hinge region, linked to each other by disulfide bonds. Fab contains the IMMUNOGLOBULIN VARIABLE REGIONS, which are part of the antigen-binding site, and the first IMMUNOGLOBULIN CONSTANT REGIONS. This fragment can be obtained by digestion of immunoglobulins with the proteolytic enzyme PAPAIN.

A trisaccharide antigen expressed on glycolipids and many cell-surface glycoproteins. In the blood the antigen is found on the surface of NEUTROPHILS; EOSINOPHILS; and MONOCYTES. In addition, CD15 antigen is a stage-specific embryonic antigen.

The visual display of data in a man-machine system. An example is when data is called from the computer and transmitted to a CATHODE RAY TUBE DISPLAY or LIQUID CRYSTAL display.

A biosensing technique in which biomolecules capable of binding to specific analytes or ligands are first immobilized on one side of a metallic film. Light is then focused on the opposite side of the film to excite the surface plasmons, that is, the oscillations of free electrons propagating along the film's surface. The refractive index of light reflecting off this surface is measured. When the immobilized biomolecules are bound by their ligands, an alteration in surface plasmons on the opposite side of the film is created which is directly proportional to the change in bound, or adsorbed, mass. Binding is measured by changes in the refractive index. The technique is used to study biomolecular interactions, such as antigen-antibody binding.

Those hepatitis B antigens found on the surface of the Dane particle and on the 20 nm spherical and tubular particles. Several subspecificities of the surface antigen are known. These were formerly called the Australia antigen.

Search BioPortfolio:

Relevant Topic

Latest News Clinical Trials Research Drugs Reports Corporate
An antibody is a protein produced by the body's immune system when it detects harmful substances, called antigens. Examples of antigens include microorganisms (such as bacteria, fungi, parasites, and viruses) and chemicals. Antibodies may be produc...


Searches Linking to this Article