1
|
Immunization with a Multivalent Listeria monocytogenes Vaccine Leads to a Strong Reduction in Vertical Transmission and Cerebral Parasite Burden in Pregnant and Non-Pregnant Mice Infected with Neospora caninum. Vaccines (Basel) 2023; 11:vaccines11010156. [PMID: 36680001 PMCID: PMC9863997 DOI: 10.3390/vaccines11010156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/04/2023] [Accepted: 01/08/2023] [Indexed: 01/12/2023] Open
Abstract
Neospora caninum is an apicomplexan parasite that causes abortion and stillbirth in cattle. We employed the pregnant neosporosis mouse model to investigate the efficacy of a modified version of the attenuated Listeria monocytogenes vaccine vector Lm3Dx_NcSAG1, which expresses the major N. caninum surface antigen SAG1. Multivalent vaccines were generated by the insertion of gra7 and/or rop2 genes into Lm3Dx_NcSAG1, resulting in the double mutants, Lm3Dx_NcSAG1_NcGRA7 and Lm3Dx_NcSAG1_NcROP2, and the triple mutant, Lm3Dx_NcSAG1_NcGRA7_NcROP2. Six experimental groups of female BALB/c mice were inoculated intramuscularly three times at two-week intervals with 1 × 107 CFU of the respective vaccine strains. Seven days post-mating, mice were challenged by the subcutaneous injection of 1 × 105N. caninum NcSpain-7 tachyzoites. Non-pregnant mice, dams and their offspring were observed daily until day 25 post-partum. Immunization with Lm3Dx_NcSAG1 and Lm3Dx_NcSAG1_NcGRA7_NcROP2 resulted in 70% postnatal pup survival, whereas only 50% and 58% of pups survived in the double mutant-vaccinated groups. Almost all pups had died at the end of the experiment in the infection control. The triple mutant was the most promising vaccine candidate, providing the highest rate of protection against vertical transmission (65%) and CNS infection. Overall, integrating multiple antigens into Lm3Dx_SAG1 resulted in lower vertical transmission and enhanced protection against cerebral infection in dams and in non-pregnant mice.
Collapse
|
2
|
Xu J, Hiramatsu R, Suhaimi H, Kato T, Fujimoto A, Tokiwa T, Ike K, Park EY. Neospora caninum antigens displaying virus-like particles as a bivalent vaccine candidate against neosporosis. Vaccine 2019; 37:6426-6434. [PMID: 31515150 DOI: 10.1016/j.vaccine.2019.09.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 08/14/2019] [Accepted: 09/02/2019] [Indexed: 01/24/2023]
Abstract
Neospora caninum is a causative and transmissible agent of dog and bovine neosporosis. The resulting reproductive failures in infected cattle lead to significant economic losses worldwide. However, there is no satisfactory treatment or vaccine currently available to combat this pathogen. Thus, the development of appropriate vaccines to manage its infection and transmission is urgently needed. In this study, we expressed Rous sarcoma virus-like particles (RSV-LP) that displayed dual N. caninum antigens in silkworms. The antigen candidates are modified by adding a transmembrane domain of GP64 protein from Bombyx mori nucleopolyhedrovirus (BmNPV) to the C-terminus of surface antigen 1 (NcSAG1) and SAG1-related sequence 2 (NcSRS2). The NcSRS2 alone or the NcSAG1/NcSRS2 bivalent form displaying RSV-LPs were purified using sucrose density gradient centrifugation. These purified VLPs were then used for immunizations in gerbils, Meriones unguiculatus, to evaluate the anti-N. caninum effects in vivo. The results demonstrated that antigens displaying RSV-LPs in immunized gerbils produced the antigen-specific antibody, leading to a relatively lower parasite load after infections of N. caninum. To the best of our knowledge, this is the first study to present an RSV-LP vaccine displaying bivalent antigens from neosporosis. Taken together, our strategy suggests that silkworm-expressed virus-like particles (VLPs) are promising bivalent vaccine candidates against N. caninum infections.
Collapse
Affiliation(s)
- Jian Xu
- Laboratory of Biotechnology, Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
| | - Rikito Hiramatsu
- Laboratory of Biotechnology, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
| | - Hamizah Suhaimi
- Laboratory of Biotechnology, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
| | - Tatsuya Kato
- Laboratory of Biotechnology, Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan; Laboratory of Biotechnology, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan; Laboratory of Biotechnology, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
| | - Akari Fujimoto
- Laboratory of Veterinary Parasitology, Nippon Veterinary and Life University, Musashino, Tokyo 180-8602, Japan
| | - Toshihiro Tokiwa
- Laboratory of Veterinary Parasitology, Nippon Veterinary and Life University, Musashino, Tokyo 180-8602, Japan.
| | - Kazunori Ike
- Laboratory of Veterinary Parasitology, Nippon Veterinary and Life University, Musashino, Tokyo 180-8602, Japan.
| | - Enoch Y Park
- Laboratory of Biotechnology, Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan; Laboratory of Biotechnology, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan; Laboratory of Biotechnology, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
| |
Collapse
|
3
|
Suhaimi H, Hiramatsu R, Xu J, Kato T, Park EY. Secretory Nanoparticles of Neospora caninum Profilin-Fused with the Transmembrane Domain of GP64 from Silkworm Hemolymph. NANOMATERIALS 2019; 9:nano9040593. [PMID: 30974883 PMCID: PMC6523865 DOI: 10.3390/nano9040593] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 04/01/2019] [Accepted: 04/06/2019] [Indexed: 12/12/2022]
Abstract
Neosporosis, which is caused by Neospora caninum, is a well-known disease in the veterinary field. Infections in pregnant cattle lead to abortion via transplacental (congenitally from mother to fetus) transmission. In this study, a N. caninum profilin (NcPROF), was expressed in silkworm larvae by recombinant Bombyx mori nucleopolyhedrovirus (BmNPV) bacmid and was purified from the hemolymph. Three NcPROF constructs were investigated, native NcPROF fused with an N-terminal PA tag (PA-NcPROF), PA-NcPROF fused with the signal sequence of bombyxin from B. mori (bx-PA-NcPROF), and bx-PA-NcPROF with additional C-terminal transmembrane and cytoplasmic domains of GP64 from BmNPV (bx-PA-NcPROF-GP64TM). All recombinant proteins were observed extra- and intracellularly in cultured Bm5 cells and silkworm larvae. The bx-PA-NcPROF-GP64TM was partly abnormally secreted, even though it has the transmembrane domain, and only it was pelleted by ultracentrifugation, but PA-NcPROF and bx-PA-NcPROF were not. Additionally, bx-PA-NcPROF-GP64TM was successfully purified from silkworm hemolymph by anti-PA agarose beads while PA-NcPROF and bx-PA-NcPROF were not. The purified bx-PA-NcPROF-GP64TM protein bound to its receptor, mouse Toll-like receptor 11 (TLR-11), and formed unique nanoparticles. These results suggest that profilin fused with GP64TM was secreted as a nanoparticle with binding affinity to its receptor and this nanoparticle formation is advantageous for the development of vaccines to N. caninum.
Collapse
Affiliation(s)
- Hamizah Suhaimi
- Laboratory of Biotechnology, Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
| | - Rikito Hiramatsu
- Laboratory of Biotechnology, Department of Applied Biological Chemistry, College of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan.
| | - Jian Xu
- Laboratory of Biotechnology, Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan.
| | - Tatsuya Kato
- Laboratory of Biotechnology, Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
- Laboratory of Biotechnology, Department of Applied Biological Chemistry, College of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan.
- Laboratory of Biotechnology, Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan.
| | - Enoch Y Park
- Laboratory of Biotechnology, Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
- Laboratory of Biotechnology, Department of Applied Biological Chemistry, College of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan.
- Laboratory of Biotechnology, Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan.
| |
Collapse
|
4
|
Kato T, Itagaki K, Yoshimoto M, Hiramatsu R, Suhaimi H, Kohsaka T, Park EY. Transduction of a Neospora caninum antigen gene into mammalian cells using a modified Bombyx mori nucleopolyhedrovirus for antibody production. J Biosci Bioeng 2017; 124:606-610. [PMID: 28716628 DOI: 10.1016/j.jbiosc.2017.06.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/23/2017] [Accepted: 06/26/2017] [Indexed: 11/29/2022]
Abstract
Autographa californica multiple nucleopolyhedrovirus (AcMNPV) can easily enter and transduce foreign genes into mammalian cells, but these functions are difficult for Bombyx mori nucleopolyhedrovirus (BmNPV). In this study, we investigated the induction of antibody production in mice immunized with an engineered BmNPV. The GP64 of BmNPV (BmGP64) was replaced with the GP64 of AcMNPV (AcGP64); this construct, designated BmNPVΔbgp/AcGP64, displays AcGP64 on the surface of BmNPV. The Neospora caninum antigen (NcSRS2) expression cassette, consisting of the cytomegalovirus immediate-early promoter and NcSRS2 from N. caninum, was inserted into BmNPVΔbgp/AcGP64; this construct was designated BmNPVΔbgp/AcGP64/SRS2. For comparison, AcMNPV/SRS2, which contains the same NcSRS2 expression cassette as for BmNPVΔbgp/AcGP64, was also constructed. NcSRS2 was expressed in HEK293T cells when the engineered BmNPVs were transduced at a multiplicity of infection of 150. BmNPVΔbgp/AcGP64/SRS2 induced the production of NcSRS2-specific antibodies in mice, whereas AcMNPV/SRS2 and the control BmNPV did not. These results suggest that BmNPV prepared from silkworm hemolymph induces the production of antigen-specific antibodies in immunized mice and can be used for antibody production and vaccine development.
Collapse
Affiliation(s)
- Tatsuya Kato
- Laboratory of Biotechnology, Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan; Laboratory of Biotechnology, Division of Applied Biological Chemistry, College of Agriculture, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan; Laboratory of Biotechnology, Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Kohei Itagaki
- Laboratory of Biotechnology, Division of Applied Biological Chemistry, College of Agriculture, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan
| | - Mai Yoshimoto
- Laboratory of Biotechnology, Division of Applied Biological Chemistry, College of Agriculture, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan
| | - Rikito Hiramatsu
- Laboratory of Biotechnology, Division of Applied Biological Chemistry, College of Agriculture, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan
| | - Hamizah Suhaimi
- Laboratory of Biotechnology, Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Tetsuya Kohsaka
- Laboratory of Biotechnology, Division of Applied Biological Chemistry, College of Agriculture, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan
| | - Enoch Y Park
- Laboratory of Biotechnology, Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan; Laboratory of Biotechnology, Division of Applied Biological Chemistry, College of Agriculture, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka 422-8529, Japan; Laboratory of Biotechnology, Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
| |
Collapse
|
5
|
Kato T, Arai S, Ichikawa H, Park EY. Versatility of chitosan/BmNPV bacmid DNA nanocomplex as transfection reagent of recombinant protein expression in silkworm larvae. Biotechnol Lett 2016; 38:1449-57. [DOI: 10.1007/s10529-016-2144-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 05/25/2016] [Indexed: 11/28/2022]
|
6
|
Long Y, Cao B, Yu L, Tukayo M, Feng C, Wang Y, Luo D. Angiostrongylus cantonensis cathepsin B-like protease (Ac-cathB-1) is involved in host gut penetration. ACTA ACUST UNITED AC 2015; 22:37. [PMID: 26682577 PMCID: PMC4684300 DOI: 10.1051/parasite/2015037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 11/27/2015] [Indexed: 12/17/2022]
Abstract
Although the global spread of the emerging zoonosis, human angiostrongyliasis, has attracted increasing attention, understanding of specific gene function has been impeded by the inaccessibility of genetic manipulation of the pathogen nematode causing this disease, Angiostrongylus cantonensis. Many parasitic proteases play key roles in host-parasite interactions, but those of A. cantonensis are always expressed as the inactive form in prokaryotic expression systems, thereby impeding functional studies. Hence, a lentiviral system that drives secreted expression of target genes fused to a Myc-His tag was used to obtain recombinant Ac-cathB-1 with biological activity. Although this class of proteases was always reported to function in nutrition and immune evasion in parasitic nematodes, recombinant Ac-cathB-1 was capable of hydrolysis of fibronectin and laminin as well as the extracellular matrix of IEC-6 monolayer, so that the intercellular space of the IEC-6 monolayer increased 5.15 times as compared to the control, while the shape of the adherent cells partly rounded up. This suggests a probable role for this protease in intestinal epithelial penetration. The inhibition of Ac-cathB-1 enzymatic activity with antiserum partly suppressed larval penetration ability in the isolated intestine. Thus, an effective system for heterologous expression of parasite proteases is presented for studying gene function in A. cantonensis; and Ac-cathB-1 was related to larval penetration ability in the host small intestine.
Collapse
Affiliation(s)
- Ying Long
- School of Life Sciences, Xiamen University, Fujian 361102, P.R. China - State Key Laboratory of Cellular Stress Biology, Xiamen University, Fujian 361102, P.R. China
| | - Binbin Cao
- School of Life Sciences, Xiamen University, Fujian 361102, P.R. China - State Key Laboratory of Cellular Stress Biology, Xiamen University, Fujian 361102, P.R. China
| | - Liang Yu
- School of Life Sciences, Xiamen University, Fujian 361102, P.R. China - State Key Laboratory of Cellular Stress Biology, Xiamen University, Fujian 361102, P.R. China
| | - Meks Tukayo
- School of Life Sciences, Xiamen University, Fujian 361102, P.R. China - State Key Laboratory of Cellular Stress Biology, Xiamen University, Fujian 361102, P.R. China
| | - Chonglv Feng
- School of Life Sciences, Xiamen University, Fujian 361102, P.R. China - State Key Laboratory of Cellular Stress Biology, Xiamen University, Fujian 361102, P.R. China
| | - Yinan Wang
- Medical College, Xiamen University, Fujian 361102, P.R. China
| | - Damin Luo
- School of Life Sciences, Xiamen University, Fujian 361102, P.R. China - State Key Laboratory of Cellular Stress Biology, Xiamen University, Fujian 361102, P.R. China
| |
Collapse
|
7
|
Evaluation of recombinant Neospora caninum antigens purified from silkworm larvae for the protection of N. caninum infection in mice. J Biosci Bioeng 2015; 120:715-9. [DOI: 10.1016/j.jbiosc.2015.04.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Revised: 04/02/2015] [Accepted: 04/03/2015] [Indexed: 11/17/2022]
|
8
|
Hwang IW, Makishima Y, Suzuki T, Kato T, Park S, Terzic A, Chung SK, Park EY. Phosphorylation of Ser-204 and Tyr-405 in human malonyl-CoA decarboxylase expressed in silkworm Bombyx mori regulates catalytic decarboxylase activity. Appl Microbiol Biotechnol 2015; 99:8977-86. [PMID: 26004805 DOI: 10.1007/s00253-015-6687-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 04/13/2015] [Accepted: 05/08/2015] [Indexed: 11/26/2022]
Abstract
Decarboxylation of malonyl-CoA to acetyl-CoA by malonyl-CoA decarboxylase (MCD; EC 4.1.1.9) is a vital catalytic reaction of lipid metabolism. While it is established that phosphorylation of MCD modulates the enzymatic activity, the specific phosphorylation sites associated with the catalytic function have not been documented due to lack of sufficient production of MCD with proper post-translational modifications. Here, we used the silkworm-based Bombyx mori nucleopolyhedrovirus (BmNPV) bacmid system to express human MCD (hMCD) and mapped phosphorylation effects on enzymatic function. Purified MCD from silkworm displayed post-translational phosphorylation and demonstrated coherent enzymatic activity with high yield (-200 μg/silkworm). Point mutations in putative phosphorylation sites, Ser-204 or Tyr-405 of hMCD, identified by bioinformatics and proteomics analyses reduced the catalytic activity, underscoring the functional significance of phosphorylation in modulating decarboxylase-based catalysis. Identified phosphorylated residues are distinct from the decarboxylation catalytic site, implicating a phosphorylation-induced global conformational change of MCD as responsible in altering catalytic function. We conclude that phosphorylation of Ser-204 and Tyr-405 regulates the decarboxylase function of hMCD leveraging the silkworm-based BmNPV bacmid expression system that offers a fail-safe eukaryotic production platform implementing proper post-translational modification such as phosphorylation.
Collapse
Affiliation(s)
- In-Wook Hwang
- Laboratory of Biotechnology, Integrated Bioscience Section, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8529, Japan.
| | - Yu Makishima
- Laboratory of Biotechnology, Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8529, Japan.
| | - Tomohiro Suzuki
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka, 422-8529, Japan.
| | - Tatsuya Kato
- Laboratory of Biotechnology, Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8529, Japan.
- Laboratory of Biotechnology, Green Chemistry Research Division, Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka, 422-8529, Japan.
| | - Sungjo Park
- Center for Regenerative Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
- Marriott Heart Disease Research Program, Division of Cardiovascular Diseases, Departments of Medicine, Molecular Pharmacology and Experimental Therapeutics, and Medical Genetics, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
| | - Andre Terzic
- Center for Regenerative Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
- Marriott Heart Disease Research Program, Division of Cardiovascular Diseases, Departments of Medicine, Molecular Pharmacology and Experimental Therapeutics, and Medical Genetics, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
| | - Shin-Kyo Chung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, 702-701, Republic of Korea.
| | - Enoch Y Park
- Laboratory of Biotechnology, Integrated Bioscience Section, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8529, Japan.
- Laboratory of Biotechnology, Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8529, Japan.
- Laboratory of Biotechnology, Green Chemistry Research Division, Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya Suruga-ku, Shizuoka, 422-8529, Japan.
| |
Collapse
|
9
|
Kato T, Otsuki T, Yoshimoto M, Itagaki K, Kohsaka T, Matsumoto Y, Ike K, Park EY. Bombyx mori Nucleopolyhedrovirus Displaying Neospora caninum Antigens as a Vaccine Candidate Against N. caninum Infection in Mice. Mol Biotechnol 2014; 57:145-54. [DOI: 10.1007/s12033-014-9810-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
10
|
Human acetyl-CoA carboxylase 2 expressed in silkworm Bombyx mori exhibits posttranslational biotinylation and phosphorylation. Appl Microbiol Biotechnol 2014; 98:8201-9. [PMID: 24740690 PMCID: PMC4163189 DOI: 10.1007/s00253-014-5715-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 03/23/2014] [Indexed: 12/26/2022]
Abstract
Biotin-dependent human acetyl-CoA carboxylases (ACCs) are integral in homeostatic lipid metabolism. By securing posttranslational biotinylation, ACCs perform coordinated catalytic functions allosterically regulated by phosphorylation/dephosphorylation and citrate. The production of authentic recombinant ACCs is heeded to provide a reliable tool for molecular studies and drug discovery. Here, we examined whether the human ACC2 (hACC2), an isoform of ACC produced using the silkworm BmNPV bacmid system, is equipped with proper posttranslational modifications to carry out catalytic functions as the silkworm harbors an inherent posttranslational modification machinery. Purified hACC2 possessed genuine biotinylation capacity probed by biotin-specific streptavidin and biotin antibodies. In addition, phosphorylated hACC2 displayed limited catalytic activity whereas dephosphorylated hACC2 revealed an enhanced enzymatic activity. Moreover, hACC2 polymerization, analyzed by native page gel analysis and atomic force microscopy imaging, was allosterically regulated by citrate and the phosphorylation/dephosphorylation modulated citrate-induced hACC2 polymerization process. Thus, the silkworm BmNPV bacmid system provides a reliable eukaryotic protein production platform for structural and functional analysis and therapeutic drug discovery applications implementing suitable posttranslational biotinylation and phosphorylation.
Collapse
|
11
|
Dong J, Otsuki T, Kato T, Park EY. Tracking Neospora caninum parasites using chimera monoclonal antibodies against its surface antigen-related sequences (rNcSRS2). J Biosci Bioeng 2014; 117:351-7. [DOI: 10.1016/j.jbiosc.2013.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 08/28/2013] [Accepted: 09/01/2013] [Indexed: 11/30/2022]
|
12
|
Dose-dependent immunogenicity of a soluble Neospora caninum tachyzoite-extract vaccine formulated with a soy lecithin/β-glucan adjuvant in cattle. Vet Parasitol 2013; 197:13-21. [DOI: 10.1016/j.vetpar.2013.04.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 04/10/2013] [Accepted: 04/20/2013] [Indexed: 11/20/2022]
|
13
|
Deo VK, Yoshimatsu K, Otsuki T, Dong J, Kato T, Park EY. Display of Neospora caninum surface protein related sequence 2 on Rous sarcoma virus-derived gag protein virus-like particles. J Biotechnol 2013; 165:69-75. [DOI: 10.1016/j.jbiotec.2013.02.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 02/22/2013] [Accepted: 02/25/2013] [Indexed: 11/16/2022]
|