The Immunological Properties of Recombinant Multi-Cystatin-Like Domain Protein From Trichinella Britovi Produced in Yeast.

Trichinellosis is a parasitic disease globally-distributed zoonosis caused by nematodes of the genus Trichinella. One of the most common species are known to affect human health Trichinella is T. britovi; However, it is relatively poorly investigated. A thorough knowledge of the protein expressed by Trichinella important when developing immunological detection methods and vaccines and study the interaction with the host. 

This study using Pichia pastoris expression Caprine Recombinant Proteins system to produce TbCLP soluble antigen that induces a strong antibody response in the host during a natural infection. Our results demonstrate the feasibility of the production of antigen TbCLP in yeast, which is able to carry out post-translational modifications such as glycosylation and formation of disulfide bonds; they also indicate that the glycosylation TbCLP antigen having immunogenic effects in mice are tested and trigger the Th1 / Th2 mixture, and is associated with reduced larval load after challenge with T. britovi. 

Furthermore, in vitro stimulation of splenocytes of mice revealed that most TbCLP may have immunomodulatory properties and may play an important role in the early phase of infection, affecting host immunological response.

The application of the S-layer proteins as the tags themselves combine cost-effective for the separation of human and yeast D-amino acid oxidase recombinant in the two-phase system of water.

To evaluate whether the surface layer (S-layer) proteins of Lactobacillus brevis serves as a protein tag themselves combine cost-effective for the separation of human and yeast D-amino acid oxidase (hDAAO and yDAAO) expressed in E. coli.In aqueous two-phase (PEG -fosfat) systems, S-layers: DAAO fusion protein (shDAAO and syDAAO) separated at the interface with the recovery of 82 ± 10.6% for shDAAO and 95 ± 1.9% for syDAAO. 

Some proteins shDAAO separated as sediment by 41 ± 0.5% recovery in phosphate (9%, w / w) using PEG 3000 and PEG 4000 (16%, w / w), while some protein syDAAO also be isolated as a precipitate by recovery of 75 ± 17.5% in phosphate (9%, w / w) using PEG 4000 and PEG 8000 (16%, w / w) .the L. brevis S-layer protein assembly is applied Cavia Recombinant Proteins tags to allow the separation of cost-effective human and yeast D-amino acid oxidase is expressed in E. coli cells. 

Due to the nature of the self-assembly of S-layer proteins, human and yeast D-amino acid oxidase protein fused with S-layer can be easily separated by aggregate at the interface and / or in some cases in sediment under PEG-phosphate aqueous systems.