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Zhang S, Lin T, Zhang D, Chen X, Ge Y, Gao Q, Fan J. Use of the selected metal-dependent enzymes for exploring applicability of human annexin A1 as a purification tag. J Biosci Bioeng 2023; 136:423-429. [PMID: 37805288 DOI: 10.1016/j.jbiosc.2023.08.006] [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: 02/08/2023] [Revised: 08/23/2023] [Accepted: 08/29/2023] [Indexed: 10/09/2023]
Abstract
Several fusion tags have been developed for non-chromatographic fusion protein purification. Previously, we identified that human annexin A1 as a novel N-terminal purification tag was used for purifying the fusion proteins produced in Escherichia coli through precipitation in 10 mM Ca2+ buffer, and redissolution of the precipitate in 15 mM EDTA buffer. In this work, we selected four metal-dependent enzymes including E. coli 5-aminolevulinate dehydratase, yeast 3-hydroxyanthranilate 3,4-dioxygenase, maize serine racemase and copper amine oxidase for investigating the annexin A1 tag applicability. Fusion of the His6-tag or the enzyme changed the behavior of precipitation-redissolution. The relatively high recovery yields of three tagged enzymes with the improved purities were obtained through two rounds of purification, whereas low recovery yield of the annexin A1 tagged maize amine oxidase was prepared. The added EDTA displayed different abilities to redissolve the fusion proteins precipitates in two precipitation-redissolution cycles. It inactivated three enzymes and obviously inhibited the activity of the fused maize serine racemase. Based on current findings, we believe that four enzymes could be applied for evaluating applicability of the proteins or peptides as affinity tags for chromatographic purification in a calcium dependent manner.
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Affiliation(s)
- Shuncheng Zhang
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Tingting Lin
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Di Zhang
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Xiaofeng Chen
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Yuanyuan Ge
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Qing Gao
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China.
| | - Jun Fan
- School of Life Science, Anhui Agricultural University, Hefei, Anhui 230036, China.
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Design, Production, and Characterization of Catalytically Active Inclusion Bodies. Methods Mol Biol 2023; 2617:49-74. [PMID: 36656516 DOI: 10.1007/978-1-0716-2930-7_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Catalytically active inclusion bodies (CatIBs) are promising biologically produced enzyme/protein immobilizates for application in biocatalysis, synthetic chemistry, and biomedicine. CatIB formation is commonly induced by fusion of suitable aggregation-inducing tags to a given target protein. Heterologous production of the fusion protein in turn yields CatIBs. This chapter presents the methodology needed to design, produce, and characterize CatIBs.
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Hu J, Chen Y, Ren Y, Xiao W, Hu Y, Yu X, Fan J. Combination of the mutations for improving activity of TEV protease in inclusion bodies. Bioprocess Biosyst Eng 2021; 44:2129-2139. [PMID: 34036441 DOI: 10.1007/s00449-021-02589-5] [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: 01/22/2021] [Accepted: 05/12/2021] [Indexed: 11/28/2022]
Abstract
Tobacco etch virus protease (TEVp) is an enzymatic reagent to remove fusion tag, but additional purification steps are required for removing the TEVp after cleavage reaction is finished. Use of carrier-free and dependent TEVp immobilizates can eliminate protease contamination. In this work, we identified that, among the four constructed missense variants, the insoluble variant with the highest activity was correspondent with the soluble one tested formerly. The activities of the insoluble 15 codon variants were assayed and the variant with highest activity was selected. The K45F and/or E106G mutations have been reported on slightly improving protein stability of the wild-type TEVp, but only E106G mutation enhanced soluble production and activity of the selected TEVp variant, and it increased soluble amounts of two codon variants with the impaired folding. The decreased activity and use efficiency of the optimized TEVp variant in inclusion bodies was balanced by the determined high level production, lower leaking amounts of the protein, the enhanced resistance to the limited proteolysis mediated by protease K and trypsin, and the increased inhibition of auto-cleavage, as comparison to those of the immobilized soluble one. Thus, the TEVp construct is a potential alternate for simplifying protein purification protocols after tag-removal.
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Affiliation(s)
- Jiong Hu
- School of Life Science, Anhui Agricultural University, 130, Changjiang West Road, Hefei, 230036, Anhui Province, People's Republic of China
| | - Yinghua Chen
- School of Life Science, Anhui Agricultural University, 130, Changjiang West Road, Hefei, 230036, Anhui Province, People's Republic of China
| | - Yuanyuan Ren
- School of Life Science, Anhui Agricultural University, 130, Changjiang West Road, Hefei, 230036, Anhui Province, People's Republic of China
| | - Wenjun Xiao
- School of Life Science, Anhui Agricultural University, 130, Changjiang West Road, Hefei, 230036, Anhui Province, People's Republic of China
| | - Yafang Hu
- School of Life Science, Anhui Agricultural University, 130, Changjiang West Road, Hefei, 230036, Anhui Province, People's Republic of China
| | - Xuelian Yu
- School of Life Science, Anhui Agricultural University, 130, Changjiang West Road, Hefei, 230036, Anhui Province, People's Republic of China
| | - Jun Fan
- School of Life Science, Anhui Agricultural University, 130, Changjiang West Road, Hefei, 230036, Anhui Province, People's Republic of China.
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Gil-Garcia M, Navarro S, Ventura S. Coiled-coil inspired functional inclusion bodies. Microb Cell Fact 2020; 19:117. [PMID: 32487230 PMCID: PMC7268670 DOI: 10.1186/s12934-020-01375-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/25/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Recombinant protein expression in bacteria often leads to the formation of intracellular insoluble protein deposits, a major bottleneck for the production of soluble and active products. However, in recent years, these bacterial protein aggregates, commonly known as inclusion bodies (IBs), have been shown to be a source of stable and active protein for biotechnological and biomedical applications. The formation of these functional IBs is usually facilitated by the fusion of aggregation-prone peptides or proteins to the protein of interest, leading to the formation of amyloid-like nanostructures, where the functional protein is embedded. RESULTS In order to offer an alternative to the classical amyloid-like IBs, here we develop functional IBs exploiting the coiled-coil fold. An in silico analysis of coiled-coil and aggregation propensities, net charge, and hydropathicity of different potential tags identified the natural homo-dimeric and anti-parallel coiled-coil ZapB bacterial protein as an optimal candidate to form assemblies in which the native state of the fused protein is preserved. The protein itself forms supramolecular fibrillar networks exhibiting only α-helix secondary structure. This non-amyloid self-assembly propensity allows generating innocuous IBs in which the recombinant protein of interest remains folded and functional, as demonstrated using two different fluorescent proteins. CONCLUSIONS Here, we present a proof of concept for the use of a natural coiled-coil domain as a versatile tool for the production of functional IBs in bacteria. This α-helix-based strategy excludes any potential toxicity drawback that might arise from the amyloid nature of β-sheet-based IBs and renders highly active and homogeneous submicrometric particles.
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Affiliation(s)
- Marcos Gil-Garcia
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Susanna Navarro
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Salvador Ventura
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain.
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