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Generation of human PTH1R construct with FLAG epitope located internally: comparison of two-fragment assembly by using PCR overlap extension or ligase.

ABSTRACT: Parathyroid hormone (PTH) regulates bone remodeling and calcium and phosphate homeostasis. PTH actions are mediated by type I PTH/PTH-related peptide receptor (PTH1R). There has been no commercially available, specific antibody to detect human PTH1R expression so far. Flag-tagged human PTH1R construct, converting the sequence DKEAPTGS (residues 94-101) in the exon E2 region of PTH1R to DYKDDDDK of Flag epitope, was generated by using PCR overlap extension or ligase enzyme for two-fragment assembly. We found that Flag-tagged PTH1R assembled by ligase was easy to be manipulated, but its efficiency was lower than that of PCR overlap extension. The PTH1R plasmids generated by both techniques were expressed successfully in vitro and in vivo and possessed the same physiological function as wild-type PTH1R. The Flag-tagged PTH1R construct will provide invaluable tools for study of PTH1R signaling and trafficking.

SUBMITTER: Wang B

PROVIDER: S-EPMC2729479 | biostudies-literature | 2009 Sep

REPOSITORIES: biostudies-literature

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Generation of human PTH1R construct with FLAG epitope located internally: comparison of two-fragment assembly by using PCR overlap extension or ligase.

Wang Bin B Yang Yanmei Y

Journal of biomolecular techniques : JBT 20090901 4

Parathyroid hormone (PTH) regulates bone remodeling and calcium and phosphate homeostasis. PTH actions are mediated by type I PTH/PTH-related peptide receptor (PTH1R). There has been no commercially available, specific antibody to detect human PTH1R expression so far. Flag-tagged human PTH1R construct, converting the sequence DKEAPTGS (residues 94-101) in the exon E2 region of PTH1R to DYKDDDDK of Flag epitope, was generated by using PCR overlap extension or ligase enzyme for two-fragment assemb ...[more]

PMID: 19721821

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Project description:Brucella suis mediates the transmission of brucellosis in humans and animals and a significant facultative zoonotic pathogen found in livestock. It has the capacity to survive and multiply in a phagocytic environment and to acquire resistance under hostile conditions thus becoming a threat globally. Antibiotic resistance is posing a substantial public health threat, hence there is an unmet and urgent clinical need for immune-based non-antibiotic methods to treat brucellosis. Hence, we aimed to explore the whole proteome of Brucella suis to predict antigenic proteins as a vaccine target and designed a novel chimeric vaccine (multi-epitope vaccine) through subtractive genomics-based reverse vaccinology approaches. The applied subsequent hierarchical shortlisting resulted in the identification of Multidrug efflux Resistance-nodulation-division (RND) transporter outer membrane subunit (gene BepC) that may act as a potential vaccine target. T-cell and B-cell epitopes have been predicted from target proteins using a number of immunoinformatic methods. Six MHC I, ten MHC II, and four B-cell epitopes were used to create a 324-amino-acid MEV construct, which was coupled with appropriate linkers and adjuvant. To boost the immunological response to the vaccine, the vaccine was combined with the TLR4 agonist HBHA protein. The MEV structure predicted was found to be highly antigenic, non-toxic, non-allergenic, flexible, stable, and soluble. To confirm the interactions with the receptors, a molecular docking simulation of the MEV was done using the human TLR4 (toll-like receptor 4) and HLAs. The stability and binding of the MEV-docked complexes with TLR4 were assessed using molecular dynamics (MD) simulation. Finally, MEV was reverse translated, its cDNA structure was evaluated, and then, in silico cloning into an E. coli expression host was conducted to promote maximum vaccine protein production with appropriate post-translational modifications. These comprehensive computer calculations backed up the efficacy of the suggested MEV in protecting against B. suis infections. However, more experimental validations are needed to adequately assess the vaccine candidate's potential. HIGHLIGHTS: • Subtractive genomic analysis and reverse vaccinology for the prioritization of novel vaccine target • Examination of chimeric vaccine in terms of allergenicity, antigenicity, MHC I, II binding efficacy, and structural-based studies • Molecular docking simulation method to rank based vaccine candidate and understand their binding modes.

Dataset Information

Generation of human PTH1R construct with FLAG epitope located internally: comparison of two-fragment assembly by using PCR overlap extension or ligase.

Publications

Generation of human PTH1R construct with FLAG epitope located internally: comparison of two-fragment assembly by using PCR overlap extension or ligase.

Similar Datasets

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