1
|
CASPON platform technology: Ultrafast circularly permuted caspase-2 cleaves tagged fusion proteins before all 20 natural amino acids at the N-terminus. N Biotechnol 2022; 71:37-46. [DOI: 10.1016/j.nbt.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/13/2022] [Accepted: 07/30/2022] [Indexed: 11/21/2022]
|
2
|
Yang X, Yin H, Peng L, Zhang D, Li K, Cui F, Xia C, Huang H, Li Z. The Global Status and Trends of Enteropeptidase: A Bibliometric Study. Front Med (Lausanne) 2022; 9:779722. [PMID: 35223895 PMCID: PMC8866687 DOI: 10.3389/fmed.2022.779722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 01/19/2022] [Indexed: 01/13/2023] Open
Abstract
BackgroundEnteropeptidase (EP) is a type II transmembrane serine protease and a physiological activator of trypsinogen. Extensive studies related to EP have been conducted to date. However, no bibliometric analysis has systematically investigated this theme. Our study aimed to visualize the current landscape and frontier trends of scientific achievements on EP, provide an overview of the past 120 years and insights for researchers and clinicians to facilitate future collaborative research and clinical intervention.MethodsQuantitative analysis of publications relating to EP from 1900 to 2020 was interpreted and graphed through the Science Citation Index Expanded of Web of Science Core Collection (limited to SCIE). Microsoft office 2019, GraphPad Prism 8, VOSviewer, and R-bibliometrix were used to conduct the bibliometric analysis.ResultsFrom 1900 to 2020, a total of 1,034 publications were retrieved. The USA had the largest number of publications, making the greatest contribution to the topic (n = 260, 25.15%). Active collaborations between countries/regions were also enrolled. Grant and Hermontaylor were perhaps the most impactful researchers in the landscape of EP. Protein Expression and Purification and the Journal of Biological Chemistry were the most prevalent (79/1,034, 7.64%) and cited journals (n = 2,626), respectively. Using the top 15 citations and co-citations achievements clarified the theoretical basis of the EP research field. Important topics mainly include the structure of EP, the affective factors for activating substrates by EP, EP-related disorders, and inhibitors of EP.ConclusionBased on the bibliometric analysis, we have gained a comprehensive analysis of the global status and research frontiers of studies investigating EP, which provides some guidance and reference for researchers and clinicians engaged in EP research.
Collapse
Affiliation(s)
- Xiaoli Yang
- Department of Clinical Medicine, Ningxia Medical University, Yinchuan, China
- Shanghai Pudong New Area Gongli Hospital, Shanghai, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
- Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Hua Yin
- Department of Clinical Medicine, Ningxia Medical University, Yinchuan, China
- Shanghai Pudong New Area Gongli Hospital, Shanghai, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
- Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Lisi Peng
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
- Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Deyu Zhang
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
- Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Keliang Li
- Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Fang Cui
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
- Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Chuanchao Xia
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
- Shanghai Institute of Pancreatic Diseases, Shanghai, China
| | - Haojie Huang
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
- Shanghai Institute of Pancreatic Diseases, Shanghai, China
- *Correspondence: Haojie Huang
| | - Zhaoshen Li
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
- Shanghai Institute of Pancreatic Diseases, Shanghai, China
- Zhaoshen Li
| |
Collapse
|
3
|
Comparison of Periplasmic and Cytoplasmic Expression of Bovine Enterokinase Light Chain in E. coli. Protein J 2022; 41:157-165. [PMID: 35091895 DOI: 10.1007/s10930-021-10033-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2021] [Indexed: 10/19/2022]
Abstract
Enterokinase enzyme is widely used in production of recombinant proteins. This enzyme is isolated from the intestine and recognizes a specific cleavage site (X↓LYS-ASP4). Several studies have been performed to produce recombinant active enterokinase. In this study, the coding sequence of bovine enteropeptidase light chain (bEKL) was isolated from Iranian Sarabi cattle and its expression was investigated in the periplasm and cytoplasm of E. coli by two different expression vectors, pET22 and pET32RH. RNA was extracted from the duodenum part of cattle, cDNA was amplified, the enterokinase light chain coding fragment was cloned and the expression was examined by SDS-PAGE analysis. The higher amounts of soluble enterokinase as a fusion with thioredoxin (Trx) were detected in cytoplasmic expression. The functional enterokinase was purified with a yield of 45 mg per litter by two-steps Ni2+ affinity chromatography. The effective activity of the enzyme implies that it can be produced in large scale for biotechnological applications.
Collapse
|
4
|
Makarov DA, Zinchenko AA, Stepanenko VN, Kalinin DS, Melikhova TD, Nokel EA, Gasparyan ME, Myagkih IV, Dolgikh DA. Development of a Pilot Technology for the Production of the Recombinant Human Enteropeptidase Light Chain in Soluble and Immobilized Forms. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1068162020050143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
5
|
Öhlknecht C, Petrov D, Engele P, Kröß C, Sprenger B, Fischer A, Lingg N, Schneider R, Oostenbrink C. Enhancing the promiscuity of a member of the Caspase protease family by rational design. Proteins 2020; 88:1303-1318. [PMID: 32432825 PMCID: PMC7497161 DOI: 10.1002/prot.25950] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 03/19/2020] [Accepted: 04/29/2020] [Indexed: 12/12/2022]
Abstract
The N-terminal cleavage of fusion tags to restore the native N-terminus of recombinant proteins is a challenging task and up to today, protocols need to be optimized for different proteins individually. Within this work, we present a novel protease that was designed in-silico to yield enhanced promiscuity toward different N-terminal amino acids. Two mutations in the active-site amino acids of human Caspase-2 were determined to increase the recognition of branched amino-acids, which show only poor binding capabilities in the unmutated protease. These mutations were determined by sequential and structural comparisons of Caspase-2 and Caspase-3 and their effect was additionally predicted using free-energy calculations. The two mutants proposed in the in-silico studies were expressed and in-vitro experiments confirmed the simulation results. Both mutants showed not only enhanced activities toward branched amino acids, but also smaller, unbranched amino acids. We believe that the created mutants constitute an important step toward generalized procedures to restore original N-termini of recombinant fusion proteins.
Collapse
Affiliation(s)
- Christoph Öhlknecht
- Institute of Molecular Modeling and SimulationUniversity of Natural Resources and Life SciencesViennaAustria
- Austrian Centre of Industrial BiotechnologyViennaAustria
| | - Drazen Petrov
- Institute of Molecular Modeling and SimulationUniversity of Natural Resources and Life SciencesViennaAustria
| | - Petra Engele
- Institute of Biochemistry and Center of Molecular Biosciences InnsbruckUniversity of InnsbruckInnsbruckAustria
- Austrian Centre of Industrial BiotechnologyViennaAustria
| | - Christina Kröß
- Institute of Biochemistry and Center of Molecular Biosciences InnsbruckUniversity of InnsbruckInnsbruckAustria
- Austrian Centre of Industrial BiotechnologyViennaAustria
| | - Bernhard Sprenger
- Institute of Biochemistry and Center of Molecular Biosciences InnsbruckUniversity of InnsbruckInnsbruckAustria
- Austrian Centre of Industrial BiotechnologyViennaAustria
| | | | - Nico Lingg
- Austrian Centre of Industrial BiotechnologyViennaAustria
| | - Rainer Schneider
- Institute of Biochemistry and Center of Molecular Biosciences InnsbruckUniversity of InnsbruckInnsbruckAustria
| | - Chris Oostenbrink
- Institute of Molecular Modeling and SimulationUniversity of Natural Resources and Life SciencesViennaAustria
| |
Collapse
|
6
|
Ancín M, Sanz-Barrio R, Santamaría E, Fernández-San Millán A, Larraya L, Veramendi J, Farran I. Functional Improvement of Human Cardiotrophin 1 Produced in Tobacco Chloroplasts by Co-expression with Plastid Thioredoxin m. PLANTS 2020; 9:plants9020183. [PMID: 32024318 PMCID: PMC7076529 DOI: 10.3390/plants9020183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/24/2020] [Accepted: 01/30/2020] [Indexed: 12/24/2022]
Abstract
Human cardiotrophin 1 (CT1), a cytokine with excellent therapeutic potential, was previously expressed in tobacco chloroplasts. However, the growth conditions required to reach the highest expression levels resulted in an impairment of its bioactivity. In the present study, we have examined new strategies to modulate the expression of this recombinant protein in chloroplasts so as to enhance its production and bioactivity. In particular, we assessed the effect of both the fusion and co-expression of Trx m with CT1 on the production of a functional CT1 by using plastid transformation. Our data revealed that the Trx m fusion strategy was useful to increase the expression levels of CT1 inside the chloroplasts, although CT1 bioactivity was significantly impaired, and this was likely due to steric hindrance between both proteins. By contrast, the expression of functional CT1 was increased when co-expressed with Trx m, because we demonstrated that recombinant CT1 was functionally active during an in vitro signaling assay. While Trx m/CT1 co-expression did not increase the amount of CT1 in young leaves, our results revealed an increase in CT1 protein stability as the leaves aged in this genotype, which also improved the recombinant protein's overall production. This strategy might be useful to produce other functional biopharmaceuticals in chloroplasts.
Collapse
Affiliation(s)
- María Ancín
- Institute for Multidisciplinary Research in Applied Biology, UPNA, 31006 Pamplona, Spain; (M.A.); (A.F.-S.M.); (L.L.); (J.V.)
| | - Ruth Sanz-Barrio
- National Centre for Biotechnology, Plant Molecular Genetics Department, CSIC, 28049 Madrid, Spain
| | - Eva Santamaría
- Hepatology Program, University of Navarra, CIMA, E-31008 Pamplona, Spain;
- CIBERehd, Instituto de Salud Carlos III, 28220 Majadahonda, Madrid, Spain
| | - Alicia Fernández-San Millán
- Institute for Multidisciplinary Research in Applied Biology, UPNA, 31006 Pamplona, Spain; (M.A.); (A.F.-S.M.); (L.L.); (J.V.)
| | - Luis Larraya
- Institute for Multidisciplinary Research in Applied Biology, UPNA, 31006 Pamplona, Spain; (M.A.); (A.F.-S.M.); (L.L.); (J.V.)
| | - Jon Veramendi
- Institute for Multidisciplinary Research in Applied Biology, UPNA, 31006 Pamplona, Spain; (M.A.); (A.F.-S.M.); (L.L.); (J.V.)
| | - Inmaculada Farran
- Institute for Multidisciplinary Research in Applied Biology, UPNA, 31006 Pamplona, Spain; (M.A.); (A.F.-S.M.); (L.L.); (J.V.)
- Correspondence: ; Tel.: +34-948-168034
| |
Collapse
|
7
|
Xu H, Wang Q, Zhang Z, Yi L, Ma L, Zhai C. A simplified method to remove fusion tags from a xylanase of Bacillus sp. HBP8 with HRV 3C protease. Enzyme Microb Technol 2019; 123:15-20. [PMID: 30686346 DOI: 10.1016/j.enzmictec.2019.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 10/19/2018] [Accepted: 01/04/2019] [Indexed: 02/06/2023]
Abstract
Human rhinovirus 3C protease (HRV 3C protease) is commonly used as a tool to remove fusion tags from recombinant proteins in gene engineering due to its distinguished specificity and high activity at low temperature. This paper is aimed to simplify the strategy of removing epitope tags from target proteins with HRV 3C protease. Fusion proteins composed of a xylanase from Bacillus sp. HBP8 (xylHB) and double tags (MBP/Nus and 6×His, with an HRV 3C protease recognition site between them) were applied as substrates. To perform the cleavage and purification, strains expressing HRV 3C protease and the substrates were mixed before (co-fermentation method) or after (post-fermentation method) inducing with IPTG, followed by cell disruption and incubation at 4℃, overnight for cleavage. The soluble cytoplasmic fraction was added to Ni-NTA resin to recover the cleaved target protein. Because the process was carried out in the cell lysate, it was named as cell lysate purification system based on HRV 3C protease (CLP3C). Our data indicated small number of cells expressing HRV 3C protease was enough to remove the fusion tags efficiently with both co-fermentation and post-fermentation methods. More importantly, the tags were cleaved precisely with no obvious non-specific degradation to the target protein. Hence, active xylanase was recovered easily with this strategy.
Collapse
Affiliation(s)
- Hu Xu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, People's Republic of China; School of Chucai honors, Hubei University, Wuhan, People's Republic of China
| | - Qian Wang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, People's Republic of China; School of Chucai honors, Hubei University, Wuhan, People's Republic of China
| | - Zhiwei Zhang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, People's Republic of China
| | - Li Yi
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, People's Republic of China
| | - Lixin Ma
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, People's Republic of China
| | - Chao Zhai
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, People's Republic of China.
| |
Collapse
|
8
|
Li P, Li L, Zhao Y, Sun L, Zhang Y. Selective binding and magnetic separation of histidine-tagged proteins using Fe3O4/Cu-apatite nanoparticles. J Inorg Biochem 2016; 156:49-54. [DOI: 10.1016/j.jinorgbio.2015.12.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 12/03/2015] [Accepted: 12/28/2015] [Indexed: 12/18/2022]
|
9
|
Azhar M, Somashekhar R. Production and Purification of Recombinant Enteropeptidase Expressed in an Insect–Baculovirus Cell System. Prep Biochem Biotechnol 2014; 45:268-78. [DOI: 10.1080/10826068.2014.907185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
10
|
Yao S, Huang Y, Zhao Y, Zhang Y, Zou X, Song C. Iminodiacetic acid functionalized porous hydroxyapatite nanoparticles for capturing histidine-tagged proteins. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 39:1-5. [DOI: 10.1016/j.msec.2014.02.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 01/28/2014] [Accepted: 02/17/2014] [Indexed: 01/13/2023]
|
11
|
Murad H, Ali B, Makeya R, Abbady AQ. Prokaryotic overexpression of TEV–rhGH and characterization of its polyclonal antibody. Gene 2014; 542:69-76. [DOI: 10.1016/j.gene.2014.02.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 12/12/2013] [Accepted: 02/07/2014] [Indexed: 11/25/2022]
|
12
|
Yao S, Zhang Y, Zhang J, Zhang X, Li B, Zhao Y. Multifunctional hydroxyapatite nanoparticle-based affinity adsorbent with sensing and fluorescence imaging capacity. J Mater Chem B 2014; 2:7988-7995. [DOI: 10.1039/c4tb01075b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nickel hydroxide/hydroxyapatite (Ni(OH)2/HAP) nanoparticles (NPs) coated with rhodamine B hydrazide (RBH) were successfully synthesized in three steps.
Collapse
Affiliation(s)
- Shasha Yao
- Key Laboratory for Special Functional Materials
- Henan University
- Kaifeng 475004, P. R. China
| | - Yu Zhang
- Key Laboratory for Special Functional Materials
- Henan University
- Kaifeng 475004, P. R. China
| | - Junli Zhang
- Key Laboratory of Plant Stress Biology
- Henan University
- Kaifeng 475004, P. R. China
| | - Xu Zhang
- Key Laboratory for Special Functional Materials
- Henan University
- Kaifeng 475004, P. R. China
| | - Binjie Li
- Key Laboratory for Special Functional Materials
- Henan University
- Kaifeng 475004, P. R. China
- Medical School of Henan University
- Kaifeng 475004, P. R. China
| | - Yanbao Zhao
- Key Laboratory for Special Functional Materials
- Henan University
- Kaifeng 475004, P. R. China
| |
Collapse
|
13
|
Synthesis of petal-like ferric oxide/cysteine architectures and their application in affinity separation of proteins. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 34:468-73. [PMID: 24268283 DOI: 10.1016/j.msec.2013.09.046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 08/28/2013] [Accepted: 09/29/2013] [Indexed: 11/20/2022]
Abstract
Petal-like ferric oxide/cysteine (FeOOH/Cys) architectures were prepared through a solvothermal route, which possessed high thiol group density. These thiol groups as binding sites can chelate Ni(2+) ions, which can be further used to enrich and separate his-tagged proteins directly from the mixture of lysed cells without sample pretreatment. These results show that the FeOOH/Cys architectures with immobilized Ni(2+) ions present negligible nonspecific protein adsorption and high protein adsorption capacity, with the saturation capacity being 88mg/g, which are especially suitable for purification of his-tagged proteins.
Collapse
|
14
|
Zou X, Li K, Zhao Y, Zhang Y, Li B, Song C. Ferroferric oxide/l-cysteine magnetic nanospheres for capturing histidine-tagged proteins. J Mater Chem B 2013; 1:5108-5113. [PMID: 32261102 DOI: 10.1039/c3tb20726a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ferroferric oxide/l-cysteine (Fe3O4/Cys) nanospheres (NSs) have been successfully synthesized via a facile solvothermal route. Fe3O4/Cys NSs possessed high thiol group density and saturation magnetization (Ms) of 84.6 emu g-1. The prepared magnetic NSs are biocompatible and manipulatable by an external magnetic force. After chelating Ni2+ ions, Fe3O4/Cys-Ni2+ NSs were used to enrich and purify histidine-tagged (His-tagged) proteins directly from the mixture of lysed cells without pretreatment. It has been found that Fe3O4/Cys-Ni2+ NSs present negligible nonspecific protein adsorption and high protein binding activity with the saturation capacity being 53.2 μg mg-1 and they are especially suitable for rapid purification of His-tagged proteins.
Collapse
Affiliation(s)
- Xueyan Zou
- Key Laboratory for Special Functional Materials, Henan University, Kaifeng 475004, P. R. China.
| | | | | | | | | | | |
Collapse
|
15
|
Gasparian ME, Bobik TV, Kim YV, Ponomarenko NA, Dolgikh DA, Gabibov AG, Kirpichnikov MP. Heterogeneous catalysis on the phage surface: Display of active human enteropeptidase. Biochimie 2013; 95:2076-81. [PMID: 23917033 DOI: 10.1016/j.biochi.2013.07.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 07/27/2013] [Indexed: 01/25/2023]
Abstract
Enteropeptidase (EC 3.4.21.9) plays a key role in mammalian digestion as the enzyme that physiologically activates trypsinogen by highly specific cleavage of the trypsinogen activation peptide following the recognition sequence D4K. The high specificity of enteropeptidase makes it a powerful tool in modern biotechnology. Here we describe the application of phage display technology to express active human enteropeptidase catalytic subunits (L-HEP) on M13 filamentous bacteriophage. The L-HEP/C122S gene was cloned in the g3p-based phagemid vector pHEN2m upstream of the sequence encoding the phage g3p protein and downstream of the signal peptide-encoding sequence. Heterogeneous catalysis of the synthetic peptide substrate (GDDDDK-β-naphthylamide) cleavage by phage-bound L-HEP was shown to have kinetic parameters similar to those of soluble enzyme, with the respective Km values of 19 μM and 20 μM and kcat of 115 and 92 s(-1). Fusion proteins containing a D4K cleavage site were cleaved with phage-bound L-HEP/C122S as well as by soluble L-HEP/C122S, and proteolysis was inhibited by soybean trypsin inhibitor. Rapid large-scale phage production, one-step purification of phage-bound L-HEP, and easy removal of enzyme activity from reaction samples by PEG precipitation make our approach suitable for the efficient removal of various tag sequences fused to the target proteins. The functional phage display technology developed in this study can be instrumental in constructing libraries of mutants to analyze the effect of structural changes on the activity and specificity of the enzyme or generate its desired variants for biotechnological applications.
Collapse
Affiliation(s)
- Marine E Gasparian
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 16/10 Miklukho-Maklaya St., 117997 Moscow, Russia.
| | | | | | | | | | | | | |
Collapse
|
16
|
Hofmeyer T, Bulani SI, Grzeschik J, Krah S, Glotzbach B, Uth C, Avrutina O, Brecht M, Göringer HU, van Zyl P, Kolmar H. Protein Production in Yarrowia lipolytica Via Fusion to the Secreted Lipase Lip2p. Mol Biotechnol 2013; 56:79-90. [DOI: 10.1007/s12033-013-9684-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
17
|
Smith ET, Johnson DA. Human enteropeptidase light chain: bioengineering of recombinants and kinetic investigations of structure and function. Protein Sci 2013; 22:577-85. [PMID: 23436726 DOI: 10.1002/pro.2239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/15/2013] [Accepted: 02/16/2013] [Indexed: 11/08/2022]
Abstract
The serine protease enteropeptidase exhibits a high level of substrate specificity for the cleavage sequence DDDDK∼ X, making this enzyme a useful tool for the separation of recombinant protein fusion domains. In an effort to improve the utility of enteropeptidase for processing fusion proteins and to better understand its structure and function, two substitution variants of human enteropeptidase, designated R96Q and Y174R, were created and produced as active (>92%) enzymes secreted by Pichia pastoris with yields in excess of 1.7 mg/Liter. The Y174R variant showed improved specificities for substrates containing the sequences DDDDK (kcat /KM = 6.83 × 10⁶ M⁻¹ sec⁻¹) and DDDDR (kcat /KM = 1.89 × 10⁷ M⁻¹ sec⁻¹) relative to all other enteropeptidase variants reported to date. BPTI inhibition of Y174R was significantly decreased. Kinetic data demonstrate the important contribution of the positively charged residue 96 to extended substrate specificity in human enteropeptidase. Modeling shows the importance of the charge-charge interactions in the extended substrate binding pocket.
Collapse
Affiliation(s)
- Eliot T Smith
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA
| | | |
Collapse
|
18
|
Nykiforuk CL, Boothe JG. Transgenic expression of therapeutic proteins in Arabidopsis thaliana seed. Methods Mol Biol 2012; 899:239-64. [PMID: 22735958 DOI: 10.1007/978-1-61779-921-1_16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
The production of therapeutic proteins in plant seed augments alternative production platforms such as microbial fermentation, cell-based systems, transgenic animals, and other recombinant plant production systems to meet increasing demands for the existing biologics, drugs under evaluation, and undiscovered therapeutics in the future. We have developed upstream purification technologies for oilseeds which are designed to cost-effectively purify therapeutic proteins amenable to conventional downstream manufacture. A very useful tool in these endeavors is the plant model system Arabidopsis thaliana. The current chapter describes the rationale and methods used to over-express potential therapeutic products in A. thaliana seed for evaluation and definitive insight into whether our production platform, Safflower, can be utilized for large-scale manufacture.
Collapse
|
19
|
Wang S, Guo X, Wang W, Wang S. Genome-wide study identifies the regulatory gene networks and signaling pathways from chondrocyte and peripheral blood monocyte of Kashin-Beck disease. Genes Cells 2012; 17:619-32. [PMID: 22776318 DOI: 10.1111/j.1365-2443.2012.01620.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2012] [Accepted: 04/11/2012] [Indexed: 12/01/2022]
Abstract
This investigation was designed to unravel gene networks in Kashin-Beck disease (KBD) and better identify target genes of KBD for gene therapy development. RNA was isolated separately from cartilage and peripheral blood samples of patients with KBD and healthy controls. Agilent 44K human whole-genome oligonucleotide microarrays were used to detect differentially expressed genes. Three significant canonical pathways and nine chondrocyte networks from chondrocytic gene expression profiles were screened using ingenuity pathway analysis (IPA), but only one network and no canonical pathways from peripheral blood monocytic gene profile were identified. Bak1, APAF-1, CASP6, IGFBP2, Col5a2 and TGFBI extracted from significant genes that involved in chondrocytic canonical pathways and networks may have closer relationship with the etiopathogenesis of KBD. Those genes may be potential targets for gene diagnosis and treatment. Six physiological functions were predominant and unique to the chondrocytic genes, whereas two were unique to peripheral blood monocytic genes. The identified genes may represent a source of potentially novel molecular targets, which may provide a better understanding of the molecular details in KBD pathogenesis and also provide useful pathways and network maps for the future research in osteochondrosis.
Collapse
Affiliation(s)
- Sen Wang
- Medicine College of Xi'an Jiaotong University, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Key Laboratory of Trace Elements and Endemic Diseases, Ministry of Health, Xi'an, Shaanxi 710061, China
| | | | | | | |
Collapse
|
20
|
Ostapchenko VG, Gasparian ME, Kosinsky YA, Efremov RG, Dolgikh DA, Kirpichnikov MP. Dissecting structural basis of the unique substrate selectivity of human enteropeptidase catalytic subunit. J Biomol Struct Dyn 2012; 30:62-73. [DOI: 10.1080/07391102.2012.674249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
21
|
Sanz-Barrio R, Millán AFS, Corral-Martínez P, Seguí-Simarro JM, Farran I. Tobacco plastidial thioredoxins as modulators of recombinant protein production in transgenic chloroplasts. PLANT BIOTECHNOLOGY JOURNAL 2011; 9:639-50. [PMID: 21426478 DOI: 10.1111/j.1467-7652.2011.00608.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Thioredoxins (Trxs) are small ubiquitous disulphide proteins widely known to enhance expression and solubility of recombinant proteins in microbial expression systems. Given the common evolutionary heritage of chloroplasts and bacteria, we attempted to analyse whether plastid Trxs could also act as modulators of recombinant protein expression in transgenic chloroplasts. For that purpose, two tobacco Trxs (m and f) with different phylogenetic origins were assessed. Using plastid transformation, we assayed two strategies: the fusion and the co-expression of Trxs with human serum albumin (HSA), which was previously observed to form large protein bodies in tobacco chloroplasts. Our results indicate that both Trxs behave similarly as regards HSA accumulation, although they act differently when fused or co-expressed with HSA. Trxs-HSA fusions markedly increased the final yield of HSA (up to 26% of total protein) when compared with control lines that only expressed HSA; this increase was mainly caused by higher HSA stability of the fused proteins. However, the fusion strategy failed to prevent the formation of protein bodies within chloroplasts. On the other hand, the co-expression constructs gave rise to an absence of large protein bodies although no more soluble HSA was accumulated. In these plants, electron micrographs showed HSA and Trxs co-localization in small protein bodies with fibrillar texture, suggesting a possible influence of Trxs on HSA solubilization. Moreover, the in vitro chaperone activity of Trx m and f was demonstrated, which supports the hypothesis of a direct relationship between Trx presence and HSA aggregates solubilization in plants co-expressing both proteins.
Collapse
Affiliation(s)
- Ruth Sanz-Barrio
- Instituto de Agrobiotecnología (UPNA-CSIC-Gobierno de Navarra), Pamplona, Spain
| | | | | | | | | |
Collapse
|
22
|
Antalis TM, Bugge TH, Wu Q. Membrane-anchored serine proteases in health and disease. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2011; 99:1-50. [PMID: 21238933 PMCID: PMC3697097 DOI: 10.1016/b978-0-12-385504-6.00001-4] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Serine proteases of the trypsin-like family have long been recognized to be critical effectors of biological processes as diverse as digestion, blood coagulation, fibrinolysis, and immunity. In recent years, a subgroup of these enzymes has been identified that are anchored directly to plasma membranes, either by a carboxy-terminal transmembrane domain (Type I), an amino-terminal transmembrane domain with a cytoplasmic extension (Type II or TTSP), or through a glycosylphosphatidylinositol (GPI) linkage. Recent biochemical, cellular, and in vivo analyses have now established that membrane-anchored serine proteases are key pericellular contributors to processes vital for development and the maintenance of homeostasis. This chapter reviews our current knowledge of the biological and physiological functions of these proteases, their molecular substrates, and their contributions to disease.
Collapse
Affiliation(s)
- Toni M Antalis
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | | | | |
Collapse
|
23
|
Gasparian ME, Bychkov ML, Dolgikh DA, Kirpichnikov MP. Strategy for improvement of enteropeptidase efficiency in tag removal processes. Protein Expr Purif 2011; 79:191-6. [PMID: 21515380 DOI: 10.1016/j.pep.2011.04.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Revised: 04/06/2011] [Accepted: 04/09/2011] [Indexed: 11/26/2022]
Abstract
Enteropeptidase (synonym: enterokinase, EC 3.4.21.9) is a heterodimeric serine protease of the intestinal brush border that activates trypsinogen by highly specific cleavage of the trypsinogen activation peptide following the sequence (Asp)(4)-Lys. It has also great biotechnological interest because of the unique substrate specificity of the serine protease domain. The high degree of specificity exhibited by enteropeptidase makes it a suitable reagent for cleaving recombinant proteins to remove affinity or other tags. However often unwanted cleavages elsewhere in the protein occurred during cleavage of fusions when high amount of enzyme is required. In this study we have improved the efficiency of fusion proteins cleavage by enteropeptidase by substitution of the Lys residue by Arg in specific cleavage sequence (Asp)(4)-Lys. We have demonstrated that 3-6-fold lower amounts of the catalytic subunit of human and bovine enteropeptidase is required for 95% cleavage of Trx/TRAIL and Trx/FGF-2 fusions with (Asp)(4)-Arg cleavage sequence in comparison to native sequence (Asp)(4)-Lys. As a result, reduced amount of non-specifically cleaved peptide fragments were observed during cleavage of (Asp)(4)-Lys/Arg mutated fusions. These findings overcome limitations of enteropeptidase in tag removal processes during recombinant proteins purification and extend its commercial benefit in the biopharmaceutical industry.
Collapse
Affiliation(s)
- Marine E Gasparian
- Department of Bioengineering, Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, RAS, 16/10 Miklukho-Maklaya, 117997 Moscow, Russia.
| | | | | | | |
Collapse
|
24
|
Chun H, Joo K, Lee J, Shin HC. Design and efficient production of bovine enterokinase light chain with higher specificity in E. coli. Biotechnol Lett 2011; 33:1227-32. [PMID: 21331584 DOI: 10.1007/s10529-011-0562-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Accepted: 01/31/2011] [Indexed: 11/26/2022]
Abstract
Enterokinase light chain (EKL) is a serine protease that recognizes Asp-Asp-Asp-Asp-Lys (D(4)K) sequence and cleaves the C-terminal peptide bond of the lysine residue. The utility of EKL as a site-specific cleavage enzyme is hampered by sporadic cleavage at other sites than the canonical D(4)K recognition sequence. In order to produce more site-specific EKL, we have generated several EKL mutants in E. coli with substitutions at Tyr174 and Lys99 using PDI (protein disulfide isomerase) fusion system. Substitution of Tyr174 by basic residues confers higher specificity on EKL. The production of EKL with higher specificity could widen the utility of EKL as a site-specific cleavage enzyme to produce various recombinant proteins with therapeutic or industrial values.
Collapse
Affiliation(s)
- Haarin Chun
- Department of Bioinformatics and Life Science, Soongsil University, Seoul, 156-743, Korea
| | | | | | | |
Collapse
|
25
|
Makarova AM, Gorbacheva LR, Savinkova IV, Mikhailova AG, Rumsh LD, Pinelis VG, Strukova SM. Effect of enteropeptidase on survival of cultured hippocampal neurons under conditions of glutamate toxicity. BIOCHEMISTRY (MOSCOW) 2010; 75:1153-9. [PMID: 21077835 DOI: 10.1134/s0006297910090099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effects of full-size bovine enteropeptidase (BEK) and of human recombinant light chain enteropeptidase (L-HEP) on survival of cultured hippocampal neurons were studied under conditions of glutamate excitotoxicity. Low concentrations of L-HEP or BEK (0.1-1 and 0.1-0.5 nM, respectively) protected hippocampal neurons against the death caused by 100 µM glutamate. Using the PAR1 (proteinase-activated receptor) antagonist SCH 79797, we revealed a PAR1-dependent mechanism of neuroprotective action of low concentrations of enteropeptidase. The protective effect of full-size enteropeptidase was not observed at the concentrations of 1 and 10 nM; moreover, 10 nM of BEK caused death of 88.9% of the neurons, which significantly exceeded the cell death caused by glutamate (31.9%). Under conditions of glutamate cytotoxicity the survival of neurons was 26.8% higher even in the presence of 10 nM of L-HEP than in the presence of 10 nM BEK. Pretreatment of cells with 10 nM of either form of enteropeptidase abolished the protective effect of 10 nM thrombin under glutamate cytotoxicity. High concentrations of BEK and L-HEP caused the death of neurons mainly through necrosis.
Collapse
Affiliation(s)
- A M Makarova
- Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | | | | | | | | | | | | |
Collapse
|
26
|
Simeonov P, Berger-Hoffmann R, Hoffmann R, Sträter N, Zuchner T. Surface supercharged human enteropeptidase light chain shows improved solubility and refolding yield. Protein Eng Des Sel 2010; 24:261-8. [PMID: 21084283 DOI: 10.1093/protein/gzq104] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Enteropeptidase is a serine protease used in different biotechnological applications. For many applications the smaller light chain can be used to avoid the expression of the rather large holoenzyme. Recombinant human enteropeptidase light chain (hEPL) shows high activity but low solubility and refolding yields, currently limiting its use in biotechnological applications. Here we describe several protein modifications that lead to improved solubility and refolding yield of human hEPL whilst retaining the enzyme activity. Specifically, protein surface supercharging (N6D, G21D, G22D, N141D, K209E) of the protein increased the solubility more than 100-fold. Replacement of a free cysteine residue with serine (C112S) improved the refolding yield by 50%. The heat stability of this C112S variant was also significantly improved by supercharging. This study shows that even mild protein surface supercharging can have pronounced effects on protein solubility and stability.
Collapse
Affiliation(s)
- Peter Simeonov
- Ultrasensitive Protein Detection Unit, Institute of Bioanalytical Chemistry, Center for Biotechnology and Biomedicine, University of Leipzig, Deutscher Platz 5, 04103 Leipzig, Germany
| | | | | | | | | |
Collapse
|
27
|
Expression and purification of metabotropic glutamate receptor 7 peptides. Protein Expr Purif 2010; 73:46-50. [DOI: 10.1016/j.pep.2010.03.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Revised: 03/30/2010] [Accepted: 03/30/2010] [Indexed: 11/15/2022]
|
28
|
DNA vaccine expressing HIV-1 gp120/immunoglobulin fusion protein enhances cellular immunity. Vaccine 2010; 28:4920-7. [DOI: 10.1016/j.vaccine.2010.05.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Revised: 04/30/2010] [Accepted: 05/16/2010] [Indexed: 11/23/2022]
|
29
|
Cleavage and secretion of Epstein-Barr virus glycoprotein 42 promote membrane fusion with B lymphocytes. J Virol 2009; 83:6664-72. [PMID: 19369343 DOI: 10.1128/jvi.00195-09] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Epstein-Barr virus (EBV) membrane glycoprotein 42 (gp42) is required for viral entry into B lymphocytes through binding to human leukocyte antigen (HLA) class II on the B-cell surface. EBV gp42 plays multiple roles during infection, including acting as a coreceptor for viral entry into B cells, binding to EBV glycoprotein H (gH) and gL during the process of membrane fusion, and blocking T-cell recognition of HLA class II-peptide complexes through steric hindrance. EBV gp42 occurs in two forms in infected cells, a full-length membrane-bound form and a soluble form generated by proteolytic cleavage that is secreted from infected cells due to loss of the N-terminal transmembrane domain. Both the full-length and the secreted gp42 forms bind to gH/gL and HLA class II, and the functional significance of gp42 cleavage is currently unclear. We found that in a virus-free cell-cell fusion assay, enhanced secretion of gp42 promoted fusion with B lymphocytes, and mutation of the site of gp42 cleavage inhibited membrane fusion activity. The site of gp42 cleavage was found to be physically distinct from the residues of gp42 necessary for binding to gH/gL. These results suggest that cleavage and secretion of gp42 are necessary for the process of membrane fusion with B lymphocytes, providing the first indicated functional difference between full-length and cleaved, secreted gp42.
Collapse
|
30
|
Purification and application of bovine enterokinase catalytic subunit (EKL) expressed from the cloned cDNA encoding EKL. J Biotechnol 2008. [DOI: 10.1016/j.jbiotec.2008.07.1146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
31
|
McCoy J, Lavallie E. Expression and purification of thioredoxin fusion proteins. ACTA ACUST UNITED AC 2008; Chapter 16:Unit16.8. [PMID: 18265135 DOI: 10.1002/0471142727.mb1608s28] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This unit describes a gene fusion expression system that uses thioredoxin, the product of the Escherichia coli trxA gene, as the fusion partner. The system is particularly useful for high-level production of soluble fusion proteins in the E. coli cytoplasm; in many cases heterologous proteins produced as thioredoxin fusion proteins are correctly folded and display full biological activity. Protein fusions to His-patch Trx can usually be purified in a single step from cell lysates. Additional protocols describe E. coli cell lysis using a French pressure cell and fractionation, osmotic release of thioredoxin fusion proteins from the E. coli cytoplasm, and heat treatment to purify some thioredoxin fusion proteins.
Collapse
Affiliation(s)
- J McCoy
- Genetics Institute, Cambridge, Massachusetts, USA
| | | |
Collapse
|
32
|
LaVallie ER, McCoy JM, Smith DB, Riggs P. Enzymatic and chemical cleavage of fusion proteins. ACTA ACUST UNITED AC 2008; Chapter 16:Unit16.4B. [PMID: 18265131 DOI: 10.1002/0471142727.mb1604bs28] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This unit provides protocols for some commonly used methods of site-specific cleavage of fusion proteins. The first three protocols describe enzymatic cleavage of proteins using proteases (factor Xa, thrombin, and enterokinase) that display highly restricted specificities, which greatly decrease the likelihood that unwanted secondary cuts will occur. Three additional protocols describe specific cleavage of fusion proteins with chemical reagents (cyanogen bromide, hydroxylamine, and low pH) as an alternative to enzymatic cleavage.
Collapse
Affiliation(s)
- E R LaVallie
- Genetic Institute, Cambridge, Massachusetts, USA
| | | | | | | |
Collapse
|
33
|
Tan H, Wang J, Zhao ZK. Purification and refolding optimization of recombinant bovine enterokinase light chain overexpressed in Escherichia coli. Protein Expr Purif 2007; 56:40-7. [PMID: 17703946 DOI: 10.1016/j.pep.2007.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2007] [Revised: 07/05/2007] [Accepted: 07/10/2007] [Indexed: 10/23/2022]
Abstract
The nucleotide sequence encoding bovine enterokinase light chain (EK) from Chinese northern yellow bovine was isolated. Two single-nucleotide mutations, namely, C245G and A528T were identified. The gene encoding the Pro82Arg/Glu176Asp variant of known bovine EK was fused with glutathione S-transferase and overexpressed mainly as an inclusion body in Escherichia coli BL21 (DE3), upon induction with IPTG and glucose. Effective fusion protein purification, refolding, auto-catalytic cleavage and mature EK recovery were described. The specific activity of the purified EK was determined as 110+/- 10 U/mg, which was comparable to a specific activity of > or =20 U/mg of the E. coli expressed EK sample provided by Sigma (Cat. No. E4906). This procedure produced approximately 53 mg of EK per 500 mL of cell culture, which was much higher than previous reports, thus providing a basis for large-scale production of EK and for further applications in biotechnology.
Collapse
Affiliation(s)
- Haidong Tan
- Dalian Institute of Chemical Physics, CAS, Dalian 116023, PR China
| | | | | |
Collapse
|
34
|
Ogiwara K, Takahashi T. Specificity of the medaka enteropeptidase serine protease and its usefulness as a biotechnological tool for fusion-protein cleavage. Proc Natl Acad Sci U S A 2007; 104:7021-6. [PMID: 17438297 PMCID: PMC1855373 DOI: 10.1073/pnas.0610447104] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We cloned two distinct cDNAs for enteropeptidase (EP) from the intestine of the medaka, Oryzias latipes, which is a small freshwater teleost. The mRNAs code for EP-1 (1,036 residues) and EP-2 (1,043 residues), both of which have a unique, conserved domain structure of the N-terminal heavy chain and C-terminal catalytic serine protease light chain. When compared with mammalian EP serine proteases, the medaka enzyme exhibited extremely low amidolytic activity for small synthetic peptide substrates. Twelve mutated forms of the medaka EP protease were produced by site-directed mutagenesis. Among them, one mutant protease, E173A, was found to have considerably reduced nonspecific hydrolytic activities both for synthetic and protein substrates without serious reduction of its Asp-Asp-Asp-Asp-Lys (D(4)K)-cleavage activity. For the cleavage of fusion proteins containing a D(4)K-cleavage site, the medaka EP proteases were shown to have advantages over their mammalian counterparts. Based on our present data, we propose that the E173A mutant is the most appropriate protease to specifically cleave proteins containing the D(4)K cleavage sequence.
Collapse
Affiliation(s)
- Katsueki Ogiwara
- Laboratory of Molecular and Cellular Interactions, Faculty of Advanced Life Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Takayuki Takahashi
- Laboratory of Molecular and Cellular Interactions, Faculty of Advanced Life Science, Hokkaido University, Sapporo 060-0810, Japan
- *To whom correspondence should be addressed. E-mail:
| |
Collapse
|
35
|
Liew OW, Jenny Chong PC, Lim YZ, Ang CX, Amy Lau YC, Yandle TG, Brennan SO. An SRLLR motif downstream of the scissile bond enhances enterokinase cleavage efficiency. Biochimie 2007; 89:21-9. [PMID: 17097793 DOI: 10.1016/j.biochi.2006.10.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2006] [Accepted: 10/06/2006] [Indexed: 10/24/2022]
Abstract
In a previous paper, we reported more efficient enterokinase cleavage at a C-terminal non-target LKGDR(201) site compared with an internally sited canonical recognition site, DDDDK(156). When this non-target site was placed internally to replace DDDDK(156) between the thioredoxin moiety and mouse NT-proCNP(1-50), this site was poorly processed leading us to conclude that efficient processing at LKGDR(201) in the first instance was due to its accessibility at the C-terminus of the fusion protein. Subsequently, we reasoned that treatment of thioredoxin-fused NT-proCNP(1-81) would allow us to retrieve full-length NT-proCNP(1-81) without undue processing at the LKGDR(201) site since this non-target site would now be located internally about 36 residues away from the C-terminus and hence not be hydrolyzed efficiently. Surprisingly, ESI-MS data showed that the LKGDR site in thioredoxin-fused human NT-proCNP(1-81) was still very efficiently cleaved and revealed a new but slow hydrolysis site with the sequence RVDTK/SRAAW to yield a peptide consistent with NT-proCNP(58-81). The evidence obtained from these experiments led us to postulate that efficient cleavage at the non-target LKGDR(201) site was not merely influenced by steric constraints but also by the sequence context downstream of the scissile bond. Hence, we constructed variants of thioredoxin-mouse NT-proCNP(1-50) where SRLLR residues (i.e. those immediately downstream from the LKGDR(201) site in NT-proCNP(1-50)) were systematically added one at a time downstream of the internal DDDDK(156) site. To evaluate the relative effects of site accessibility and downstream sequence context on the efficiency of enterokinase cleavage, we have also replaced the native LKGDR(201) sequence with DDDDK(201). Our results showed that incremental addition of SRLLR residues led to a steady increase in the rate of hydrolysis at DDDDK(156). Further variants comprising DDDDK(156)SS, DDDDK(156)SD and DDDDK(156)RR showed that the minimal critical determinants for enhanced enterokinase cleavage are serine in the P1' position followed by a serine or a basic residue, lysine or arginine, in the P2' position. Our data provided conclusive evidence that the influence of downstream sequences on recombinant light chain enterokinase activity was greater than accessibility of the target site at the terminus region of the protein. We further showed that the catalytic efficiency of the native holoenzyme was influenced primarily by residues on the N-terminal side of the scissile bond while being neutral to residues on the C-terminal side. Finally, we found that cleavage of all nine fusion proteins reflects accurate hydrolysis at the DDDDK(156) and DDDDK(201) sites when recombinant light chain enterokinase was used while non-specific processing at secondary sites were observed when these fusion proteins were treated with the native holoenzyme.
Collapse
Affiliation(s)
- Oi Wah Liew
- Deputy Principal (Academic)'s Office, Technology Centre for Life Sciences, Singapore Polytechnic, 500 Dover Road, Singapore 139651, Singapore.
| | | | | | | | | | | | | |
Collapse
|
36
|
Liew OW, Ching Chong JP, Yandle TG, Brennan SO. Preparation of recombinant thioredoxin fused N-terminal proCNP: Analysis of enterokinase cleavage products reveals new enterokinase cleavage sites. Protein Expr Purif 2005; 41:332-40. [PMID: 15866719 DOI: 10.1016/j.pep.2005.03.006] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2004] [Revised: 02/25/2005] [Indexed: 10/25/2022]
Abstract
C-type natriuretic peptide (CNP) acts as a paracrine hormone to dilate blood vessels and is also required for the growth of long bones. In vivo, CNP is produced by cleavage from the C-terminal end of a larger proCNP peptide. The remaining N-terminal proCNP fragment (NT-proCNP) escapes into the circulation where its concentration is much higher than that of CNP due presumably to a lower clearance rate. Our strategy to obtain large quantities of pure NT-proCNP for further physiological investigations was to express it as a fusion protein with His(6)-tagged thioredoxin followed by cleavage using enterokinase to yield NT-proCNP alone. We have successfully designed and artificially synthesized the coding sequence specifying both mouse and human NT-proCNP with built-in codon bias towards Escherichia coli codon preference. An enterokinase recognition sequence was incorporated immediately upstream of the NT-proCNP coding sequence to allow the fusion protein to be cleaved without leaving any extra residues on the NT-proCNP peptide. High levels of fusion proteins were obtained, constituting 50-58% of total bacterial proteins. Greater than 90% of recombinant thioredoxin/NT-proCNP was expressed in the soluble form and purified to near homogeneity in a single chromatographic step using nickel as the metal ion in IMAC. A time course analysis of the products released from enterokinase cleavage of the recombinant proteins by ESI-MS revealed three sensitive secondary cleavage sites: two were located on vector-associated sequences linking the thioredoxin moiety and NT-proCNP, and one at the C-terminal end of NT-proCNP. Clearly, substrate specificity of both the native and recombinant forms of enterokinase for the recognition sequence DDDDK was by no means exclusive. Hydrolysis at the unexpected LKGDR site located towards the carboxyl end on NT-proCNP was significantly more efficient than at the internally sited DDDDK target sequence. However, when this same sequence was sited internally replacing the DDDDK in another construct of thioredoxin/mouse NT-proCNP, it was found to be poorly processed by enterokinase. Our results showed that non-target sequences can be preferentially recognized over the canonical DDDDK sequence when located accessibly at the ends of proteins.
Collapse
Affiliation(s)
- Oi Wah Liew
- Deputy Principal (Academic)'s Office, Technology Centre for Life Sciences, Singapore Polytechnic, 500 Dover Road, Singapore 139651, Singapore.
| | | | | | | |
Collapse
|
37
|
Kenig M, Peternel S, Gaberc-Porekar V, Menart V. Influence of the protein oligomericity on final yield after affinity tag removal in purification of recombinant proteins. J Chromatogr A 2005; 1101:293-306. [PMID: 16256128 DOI: 10.1016/j.chroma.2005.09.089] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2004] [Revised: 09/16/2005] [Accepted: 09/28/2005] [Indexed: 11/23/2022]
Abstract
The new aspect concerning the applicability of histidine and other affinity tags for the purification of oligomeric proteins, with particular emphasis on cleavage efficiency and final yield, is presented in this study. The final yield depends on both the cleavage efficiency and the degree of oligomerization of the protein. Cleavage procedures that are good enough for monomeric proteins can be problematic for oligomeric proteins. Random distribution of uncleaved or partially cleaved affinity tags among oligomers is the main cause of reduced yields. A trimeric protein, tumour necrosis factor alpha (TNF-alpha), bearing different histidine tags, was used as a model protein to explore and confirm this theoretical concept. Analysis of mixed TNF trimers, prepared from tag-free TNF doped with various amounts of histidine-tagged TNF, revealed an increased retention of the trimeric protein on immobilized metal-ion affinity chromatography (IMAC) columns. When 20% of histidine-tagged TNF was added, more than 50% of the protein was retained on the IMAC column. Thus, the applicability of histidine- and other affinity tags for purifying oligomeric proteins is significantly prejudiced in the case of higher oligomers. Various histidine-tags were fused to the N-terminus of full-length TNF-alpha and to the truncated form (dN6) of TNF-alpha. Two-step IMAC separation was used for purification. In the first step, IMAC-1, over 95% purity of histidine-tagged protein was achieved in all cases. Endo- and exoproteolytic removal of histidine tags with enterokinase (EKmax) and aminodipeptidase (DAPase) was studied and the major parameters affecting cleavage efficiency, microheterogeneity and final yield are critically discussed. IMAC-2 was used as the second and final step for removing the cleavage enzyme, cleaved tags, unprocessed protein and some other impurities. Selection of the optimal cleavage enzyme depends on the amino acid composition of the N-terminus and the intended use of the purified protein. The main conclusion is that special caution should be taken when introducing affinity tags to oligomeric proteins, with the final goal to produce pure, tag-free protein with acceptable yields. Given the same enzyme cleavage efficiency one can expect progressively reduced final protein yields with increasing degree of oligomerization. This should be considered as a general rule.
Collapse
Affiliation(s)
- Maja Kenig
- Lek Pharmaceuticals d.d., Verovskova 57, SI-1526 Ljubljana, Slovenia
| | | | | | | |
Collapse
|
38
|
Ishihara G, Goto M, Saeki M, Ito K, Hori T, Kigawa T, Shirouzu M, Yokoyama S. Expression of G protein coupled receptors in a cell-free translational system using detergents and thioredoxin-fusion vectors. Protein Expr Purif 2005; 41:27-37. [PMID: 15802218 DOI: 10.1016/j.pep.2005.01.013] [Citation(s) in RCA: 144] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2004] [Revised: 12/28/2004] [Indexed: 11/20/2022]
Abstract
In Escherichia coli and other cell-based expression systems, there are critical difficulties in synthesizing membrane proteins, such as the low protein expression levels and the formation of insoluble aggregates. However, structure determinations by X-ray crystallography require the purification of milligram quantities of membrane proteins. In this study, we tried to solve these problems by using cell-free protein expression with an E. coli S30 extract, with G protein coupled receptors (GPCRs) as the target integral membrane proteins. In this system, the thioredoxin-fusion vector induced high protein expression levels as compared with the non-fusion and hexa-histidine-tagged proteins. Two detergents, Brij35 and digitonin, effectively solubilized the produced GPCRs, with little or no effect on the protein yields. The synthesized proteins were detected by Coomassie brilliant blue staining within 1h of reaction initiation, and were easily reconstituted within phospholipid vesicles. Surprisingly, the unpurified, reconstituted thioredoxin-fused receptor proteins had functional activity, in that a specific affinity binding value of an antagonist was obtained for the receptor. This cell-free translation system (about 1mg/ml of reaction volume for 6-8 h) has biophysical and biochemical advantages for the synthesis of integral membrane proteins.
Collapse
MESH Headings
- Animals
- Cell-Free System
- DNA/genetics
- Detergents
- Digitonin
- Escherichia coli/genetics
- Escherichia coli/metabolism
- GTP-Binding Protein alpha Subunits, Gq-G11/biosynthesis
- GTP-Binding Protein alpha Subunits, Gq-G11/genetics
- GTP-Binding Protein alpha Subunits, Gq-G11/isolation & purification
- GTP-Binding Protein alpha Subunits, Gs/biosynthesis
- GTP-Binding Protein alpha Subunits, Gs/genetics
- GTP-Binding Protein alpha Subunits, Gs/isolation & purification
- Genetic Vectors
- Humans
- In Vitro Techniques
- Kinetics
- Membrane Fusion
- Polidocanol
- Polyethylene Glycols
- Protein Biosynthesis
- Rats
- Receptor, Muscarinic M2/biosynthesis
- Receptor, Muscarinic M2/genetics
- Receptor, Muscarinic M2/isolation & purification
- Receptors, Adrenergic, beta-2/biosynthesis
- Receptors, Adrenergic, beta-2/genetics
- Receptors, Adrenergic, beta-2/isolation & purification
- Receptors, G-Protein-Coupled/biosynthesis
- Receptors, G-Protein-Coupled/genetics
- Receptors, G-Protein-Coupled/isolation & purification
- Receptors, Neurotensin/biosynthesis
- Receptors, Neurotensin/genetics
- Receptors, Neurotensin/isolation & purification
- Recombinant Fusion Proteins/biosynthesis
- Recombinant Fusion Proteins/genetics
- Recombinant Fusion Proteins/isolation & purification
- Solubility
- Thioredoxins/biosynthesis
- Thioredoxins/genetics
- Thioredoxins/isolation & purification
Collapse
Affiliation(s)
- Goshi Ishihara
- RIKEN Genomic Sciences Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Abstract
Structure determination of protein?RNA complexes in solution provides unique insights into factors that are involved in protein/RNA recognition. Here, we review the methodology used in our laboratory to overcome the challenges of protein?RNA structure determination by nuclear magnetic resonance (NMR). We use as two examples complexes recently solved in our laboratory, the nucleolin RBD12/b2NRE and Rnt1p dsRBD/snR47h complexes. Topics covered are protein and RNA preparation, complex formation, identification of the protein/RNA interface, protein and RNA resonance assignment, intermolecular NOE assignment, and structure calculation and analysis.
Collapse
Affiliation(s)
- Haihong Wu
- Department of Chemistry and Biochemistry, University of California, Los Angeles 90095, USA
| | | | | |
Collapse
|
40
|
Watanabe Y, Okui A, Mitsui S, Kawarabuki K, Yamaguchi T, Uemura H, Yamaguchi N. Molecular cloning and tissue-specific expression analysis of mouse spinesin, a type II transmembrane serine protease 5. Biochem Biophys Res Commun 2004; 324:333-40. [PMID: 15465023 DOI: 10.1016/j.bbrc.2004.09.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2004] [Indexed: 11/25/2022]
Abstract
We have previously reported novel serine proteases isolated from cDNA libraries of the human and mouse central nervous system (CNS) by PCR using degenerate oligodeoxyribonucleotide primers designed on the basis of the serine protease motifs, AAHC and DSGGP. Here we report a newly isolated serine protease from the mouse CNS. This protease is homologous (77.9% identical) to human spinesin type II transmembrane serine protease 5. Mouse spinesin (m-spinesin) is also composed of (from the N-terminus) a short cytoplasmic domain, a transmembrane domain, a stem region containing a scavenger-receptor-like domain, and a serine protease domain, as is h-spinesin. We also isolated type 1, type 2, and type 3 variant cDNAs of m-spinesin. Full-length spinesin (type 4) and type 3 contain all the domains, whereas type 1 and type 2 variants lack the cytoplasmic, transmembrane, and scavenger-receptor-like domains. Subcellular localization of the variant forms was analyzed using enhanced green fluorescent protein (EGFP) fusion proteins. EGFP-type 4 fusion protein was predominantly localized to the ER, Golgi apparatus, and plasma membrane, whereas EGFP-type 1 was localized to the cytoplasm, reflecting differential classification of m-spinesin variants into transmembrane and cytoplasmic types. We analyzed the distribution of m-spinesin variants in mouse tissues, using RT-PCR with variant-specific primer sets. Interestingly, transmembrane-type spinesin, types 3 and 4, was specifically expressed in the spinal cord, whereas cytoplasmic type, type 1, was expressed in multiple tissues, including the cerebrum and cerebellum. Therefore, m-spinesin variants may have distinct biological functions arising from organ-specific variant expression.
Collapse
Affiliation(s)
- Yoshihisa Watanabe
- Department of Cell Biology, Institute for Geriatrics, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
| | | | | | | | | | | | | |
Collapse
|
41
|
Hansen IA, Fassnacht M, Hahner S, Hammer F, Schammann M, Meyer SR, Bicknell AB, Allolio B. The adrenal secretory serine protease AsP is a short secretory isoform of the transmembrane airway trypsin-like protease. Endocrinology 2004; 145:1898-905. [PMID: 14691009 DOI: 10.1210/en.2003-0930] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
To further elucidate the role of proteases capable of cleaving N-terminal proopiomelanocortin (N-POMC)-derived peptides, we have cloned two cDNAs encoding isoforms of the airway trypsin-like protease (AT) from mouse (MAT) and rat (RAT), respectively. The open reading frames comprise 417 amino acids (aa) and 279 aa. The mouse AT gene was located at chromosome 5E1 and contains 10 exons. The longer isoform, which we designated MAT1 and RAT1, has a simple type II transmembrane protein structure, consisting of a short cytoplasmic domain, a transmembrane domain, a SEA (63-kDa sea urchin sperm protein, enteropeptidase, agrin) module, and a serine protease domain. The human homolog of MAT1 and RAT1 is the human AT (HAT). The shorter isoform, designated MAT2 and RAT2, which contains an alternative N terminus, was formerly described in the rat as adrenal secretory serine protease (AsP) and has been shown to be involved in the processing of N-POMC-derived peptides. In contrast to the long isoform, neither MAT2 and RAT2 (AsP) contain a transmembrane domain nor a SEA domain but an N-terminal signal peptide to direct the enzyme to the secretory pathway. The C terminus, covering the catalytic triad, is identical in both isoforms. Immunohistochemically, MAT/RAT was predominantly expressed in tissues of the upper gastrointestinal and the respiratory tract-but also in the adrenal gland. Moreover, isoform-specific RT-PCR and quantitative PCR analysis revealed a complex expression pattern of the two isoforms with differences between mice and rats. These findings indicate a multifunctional role of these proteases beyond adrenal proliferation.
Collapse
Affiliation(s)
- Immo A Hansen
- Endocrinology and Diabetes Unit, Department of Medicine, University of Wuerzburg, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Dumas JJ, Kumar R, McDonagh T, Sullivan F, Stahl ML, Somers WS, Mosyak L. Crystal structure of the wild-type von Willebrand factor A1-glycoprotein Ibalpha complex reveals conformation differences with a complex bearing von Willebrand disease mutations. J Biol Chem 2004; 279:23327-34. [PMID: 15039442 DOI: 10.1074/jbc.m401659200] [Citation(s) in RCA: 157] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The adhesion of platelets to the subendothelium of blood vessels at sites of vascular injury under high shear conditions is mediated by a direct interaction between the platelet receptor glycoprotein Ibalpha (GpIbalpha) and the A1 domain of the von Willebrand factor (VWF). Here we report the 2.6-A crystal structure of a complex comprised of the extracellular domain of GpIbalpha and the wild-type A1 domain of VWF. A direct comparison of this structure to a GpIbalpha-A1 complex containing "gain-of-function" mutations, A1-R543Q and GpIbalpha-M239V, reveals specific structural differences between these complexes at sites near the two GpIbalpha-A1 binding interfaces. At the smaller interface, differences in interaction show that the alpha1-beta2 loop of A1 serves as a conformational switch, alternating between an open alpha1-beta2 isomer that allows faster dissociation of GpIbalpha-A1, as observed in the wild-type complex, and an extended isomer that favors tight association as seen in the complex containing A1 with a type 2B von Willebrand Disease (VWD) mutation associated with spontaneous binding to GpIbalpha. At the larger interface, differences in interaction associated with the GpIbalpha-M239V platelet-type VWD mutation are minor and localized but feature discrete gamma-turn conformers at the loop end of the beta-hairpin structure. The beta-hairpin, stabilized by a strong classic gamma-turn as seen in the mutant complex, relates to the increased affinity of A1 binding, and the beta-hairpin with a weak inverse gamma-turn observed in the wild-type complex corresponds to the lower affinity state of GpIbalpha. These findings provide important details that add to our understanding of how both type 2B and platelet-type VWD mutations affect GpIbalpha-A1 binding affinity.
Collapse
Affiliation(s)
- John J Dumas
- Department of Chemical and Screening Sciences, Wyeth, Cambridge, Massachusetts 02140, USA
| | | | | | | | | | | | | |
Collapse
|
43
|
Peng L, Zhong X, Ou J, Zheng S, Liao J, Wang L, Xu A. High-level secretory production of recombinant bovine enterokinase light chain by Pichia pastoris. J Biotechnol 2004; 108:185-92. [PMID: 15129728 DOI: 10.1016/j.jbiotec.2003.11.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Enterokinase (EC 3.4.21.9) is a serine proteinase with a specific digest sequence (Asp)4-Lys in the duodenum. Its high specificity for the recognition site makes enterokinase (EK) a useful tool for an in vitro cleavage of fusion proteins. In this work, an active bovine enterokinase light chain (EK(L)) was produced in secretory form by a recombinant strain of the methylotrophic yeast Pichia pastoris. The influences of methanol utilization phenotype of the host strain, induction pH, and carbon source on the recombinant production were studied. The production of recombinant EK(L) by Mut(s) strain was much higher than that by Mut+ strain. When inducted at pH 6.0, on a glycerol/methanol medium, the concentration of recombinant EK(L) (rEK(L)) reached 350 mg l(-1), which was 20-fold higher than that reported previously. The recombinant EK(L) was purified in a simple procedure on the anion exchange chromatography and 15 mg pure active EK(L) were obtained from 100 ml culture broth supernatant. The specific activity of purified rEK(L) was approximately 9000 u mg(-1). To facilitate purification and removal of rEKL after cleavage of fusion protein, the C-terminal His-tagged EK(L) (EK(L)/His) was also expressed in P. pastoris, and this His-tagged EK(L) exhibited a similar enzymatic activity to the untagged EK(L).
Collapse
Affiliation(s)
- Lisheng Peng
- The Open Laboratory for Marine Functional Genomics of State High-Tech Development, Department of Biochemistry, College of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, PR China
| | | | | | | | | | | | | |
Collapse
|
44
|
Affiliation(s)
- Qingyu Wu
- Department of Cardiovascular Research, Berlex Biosciences, Richmond, California 94806, USA
| |
Collapse
|
45
|
Gasparian ME, Ostapchenko VG, Schulga AA, Dolgikh DA, Kirpichnikov MP. Expression, purification, and characterization of human enteropeptidase catalytic subunit in Escherichia coli. Protein Expr Purif 2003; 31:133-9. [PMID: 12963350 DOI: 10.1016/s1046-5928(03)00159-1] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Enteropeptidase (synonym:enterokinase, EC 3.4.21.9) is a heterodimeric serine protease of the intestinal brush border that activates trypsinogen by highly specific cleavage of the trypsinogen activation peptide following the sequence (Asp)(4)-Lys. The DNA sequence encoding the light chain (catalytic subunit) of human enteropeptidase (GenBank Accession No. U09860) was synthesized from 26 oligonucleotides by polymerase chain reaction and cloned into plasmid pET-32a downstream to the gene of fusion partner thioredoxin immediately after the DNA sequence encoding enteropeptidase recognition site. The fusion protein thioredoxin/human enteropeptidase light chain was expressed in Escherichia coli BL21(DE3) strain in both soluble and insoluble forms. The soluble recombinant fusion protein failed to undergo autocatalytic cleavage and activation; however, autocatalytic cleavage and activation of recombinant human enteropeptidase light chain (L-HEP) were achieved by solubilization and renaturation of the fusion protein from inclusion bodies and the active L-HEP was purified on agarose-linked soybean trypsin inhibitor. The purified L-HEP cleaved the synthetic peptide substrate Gly-Asp-Asp-Asp-Asp-Lys-beta-naphthylamide with kinetic parameters K(m)=0.16 mM and k(cat)=115 s(-1) and small ester Z-Lys-SBzl with K(m)=140 microM, k(cat)=133 s(-1). L-HEP associated with soybean trypsin inhibitor slowly and small ester Z-Lys-SBzl cleavage was inhibited with K(i)(*)=2.3 nM. L-HEP digested thioredoxin/human epidermal growth factor fusion protein five times faster than equal activity units of bovine recombinant light chain (EKMax, Invitrogen) at the same conditions.
Collapse
Affiliation(s)
- Marine E Gasparian
- Laboratory of Protein Engineering, Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, RAS, 16/10 Miklukho-Maklaya, 117997 GSP, Moscow, Russia.
| | | | | | | | | |
Collapse
|
46
|
Yuan LD, Hua ZC. Expression, purification, and characterization of a biologically active bovine enterokinase catalytic subunit in Escherichia coli. Protein Expr Purif 2002; 25:300-4. [PMID: 12135563 DOI: 10.1016/s1046-5928(02)00012-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Enterokinase (EC 3.4.21.9) is a serine proteinase in the duodenum that exhibits specificity for the sequence (Asp)(4)-Lys. It converts trypsinogen to trypsin. Its high specificity for the recognition site makes enterokinase (EK) a useful tool for in vitro cleavage of fusion proteins. cDNA encoding the catalytic chain of Chinese bovine enterokinase was cloned and its encoding amino acid sequence is identical to the previously reported sequence although there are two one-base mutations which do not change the encoded amino acid. The EK catalytic subunit cDNA was cloned into plasmid pET32a, and fused downstream to the fusion partner thioredoxin (Trx) and the following DDDDK enterokinase recognition sequence. The recombinant bovine enterokinase catalytic subunit was expressed in Escherichia coli BL21(DE3), and most products existed in soluble form. After an in vivo autocatalytic cleavage of the recombinant Trx-EK catalytic domain fusion protein, intact, biologically active EK catalytic subunit was released from the fusion protein. The recombinant intact EK catalytic subunit was purified to homogeneity with a specific activity of 720 AUs/mg protein through ammonium sulfate precipitation, DEAE chromatography, and gel filtration. The purified intact EK catalytic subunit has a K(m) of 0.17 mM, and K(cat) is 20.8s(-1). From 100 ml flask culture, 4.3 mg pure active EK catalytic subunits were obtained.
Collapse
Affiliation(s)
- Liu-Di Yuan
- Department of Biochemistry, State Key Laboratory of Pharmaceutical Biotechnology and Institute of Molecular and Cell Biology, College of Life Sciences, Nanjing University, Nanjing 210093, People's Republic of China
| | | |
Collapse
|
47
|
Song HW, Choi SI, Seong BL. Engineered recombinant enteropeptidase catalytic subunit: effect of N-terminal modification. Arch Biochem Biophys 2002; 400:1-6. [PMID: 11913964 DOI: 10.1006/abbi.2001.2737] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Enteropeptidase (enterokinase) is a serine protease highly specific for recognition and cleavage of the target sequence of Asp-Asp-Asp-Asp-Lys (D4K). The three-dimensional structure of the enteropeptidase shows that the N-terminal amino acid is buried inside the protein providing molecular interactions necessary to maintain the conformation of the active site. To determine the influence of the N-terminal amino acid of enteropeptidase light chain (EK(L)) on the enzymatic activity, we constructed various mutants including 17 different single amino acid substitutions and three different extensions at the N-terminal end. The mutants of recombinant enteropeptidase (rEK(L)) were expressed in Saccharomyces cerevisiae and secreted into culture medium. Among 20 different mutants tested, the only mutant with the Ile --> Val substitution exhibited significant activity. The kinetic properties of the mutant protein were very similar to those of the wild-type rEK(L). Based on the three-dimensional structure where the N-terminal Ile is oriented into hydrophobic pocket, the results suggest that Val could substitute Ile without affecting the active conformation of the enzyme. The results also explain why all trypsin-like serine proteases carry either Ile or Val at the N-termini and none other amino acid residues are found. Moreover, this finding provides a mental framework for expressing the N-terminally engineered enteropeptidase in Escherichia coli, utilizing the known property of the methionine aminopeptidase that exhibits poor activity toward the N-terminal Met-Ile bond, but offers efficient cleavage of the Met-Val bond.
Collapse
Affiliation(s)
- Hye-Won Song
- Protheon Incorporated, Yonsei Engineering Center B120E, Seoul 120-749, Korea
| | | | | |
Collapse
|
48
|
Yamaguchi N, Okui A, Yamada T, Nakazato H, Mitsui S. Spinesin/TMPRSS5, a novel transmembrane serine protease, cloned from human spinal cord. J Biol Chem 2002; 277:6806-12. [PMID: 11741986 DOI: 10.1074/jbc.m103645200] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A cDNA encoding a novel serine protease, which we designated spinesin, has been cloned from human spinal cord. The longest open reading frame was 457 amino acids. A homology search revealed that the human spinesin gene was located at chromosome 11q23 and contained 13 exons, the gene structure being similar to that of TMPRSS3 whose gene is also located on 11q23. Spinesin has a simple type II transmembrane structure, consisting of, from the N terminus, a short cytoplasmic domain, a transmembrane domain, a stem region containing a scavenger receptor-like domain, and a serine protease domain. Unlike TMPRSS3, it carries no low density lipoprotein receptor domain in the stem region. The extracellular region carries five N-glycosylation sites. The sequence of the protease domain carried the essential triad His, Asp, and Ser and showed some similarity to that of TMPRSS2, hepsin, HAT, MT-SP1, TMPRSS3, and corin, sharing 45.5, 41.9, 41.3, 40.3, 39.1, and 38.5% identity, respectively. The putative mature protease domain preceded by H(6)DDDDK was produced in Escherichia coli, purified, and successfully activated by immobilized enterokinase. Its optimal pH was about 10. It cleaved synthetic substrates for trypsin, which is inhibited by p-amidinophenylmethanesulfonyl fluoride hydrochloride but not by antipain or leupeptin. Northern blot analysis against mRNA from human tissues including liver, lung, placenta, and heart demonstrated a specific expression of spinesin mRNA in the brain. Immunohistochemically, spinesin was predominantly expressed in neurons, in their axons, and at the synapses of motoneurons in the spinal cord. In addition, some oligodendrocytes were clearly stained. These results indicate that spinesin is transported to the synapses through the axons after its synthesis in the cytoplasm and may play important roles at the synapses. Further analyses are required to clarify its roles at the synapses and in oligodendrocytes.
Collapse
MESH Headings
- Aged
- Amino Acid Sequence
- Amino Acids/chemistry
- Bacteria/metabolism
- Base Sequence
- Blotting, Northern
- Blotting, Western
- Chromosome Mapping
- Chromosomes, Human, Pair 11
- Cloning, Molecular
- Cytoplasm/metabolism
- DNA, Complementary/metabolism
- Electrophoresis, Polyacrylamide Gel
- Escherichia coli/metabolism
- Exons
- Humans
- Hydrogen-Ion Concentration
- Immunohistochemistry
- Male
- Membrane Proteins/chemistry
- Membrane Proteins/genetics
- Mitochondrial Proteins
- Molecular Sequence Data
- Neoplasm Proteins
- Open Reading Frames
- Organ Culture Techniques
- Protease Inhibitors/pharmacology
- Protein Structure, Tertiary
- RNA, Messenger/metabolism
- Recombinant Proteins/chemistry
- Recombinant Proteins/metabolism
- Sequence Homology, Amino Acid
- Serine Endopeptidases/chemistry
- Serine Endopeptidases/genetics
- Serine Endopeptidases/metabolism
- Spinal Cord/metabolism
- Time Factors
- Tissue Distribution
- Tosyl Compounds/pharmacology
- Trypsin/chemistry
Collapse
Affiliation(s)
- Nozomi Yamaguchi
- Department of Cell Biology, Research Institute for Neurological Diseases and Geriatrics, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan.
| | | | | | | | | |
Collapse
|
49
|
Holzinger A, Maier EM, Bück C, Mayerhofer PU, Kappler M, Haworth JC, Moroz SP, Hadorn HB, Sadler JE, Roscher AA. Mutations in the proenteropeptidase gene are the molecular cause of congenital enteropeptidase deficiency. Am J Hum Genet 2002; 70:20-5. [PMID: 11719902 PMCID: PMC384888 DOI: 10.1086/338456] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2001] [Accepted: 11/01/2001] [Indexed: 11/03/2022] Open
Abstract
Enteropeptidase (enterokinase [E.C.3.4.21.9]) is a serine protease of the intestinal brush border in the proximal small intestine. It activates the pancreatic proenzyme trypsinogen, which, in turn, releases active digestive enzymes from their inactive pancreatic precursors. Congenital enteropeptidase deficiency is a rare recessively inherited disorder leading, in affected infants, to severe failure to thrive. The genomic structure of the proenteropeptidase gene (25 exons, total gene size 88 kb) was characterized in order to perform DNA sequencing in three clinically and biochemically proved patients with congenital enteropeptidase deficiency who were from two families. We found compound heterozygosity for nonsense mutations (S712X/R857X) in two affected siblings and found compound heterozygosity for a nonsense mutation (Q261X) and a frameshift mutation (FsQ902) in the third patient. In accordance with the biochemical findings, all four defective alleles identified are predicted null alleles leading to a gene product not containing the active site of the enzyme. These data provide first evidence that proenteropeptidase-gene mutations are the primary cause of congenital enteropeptidase deficiency.
Collapse
Affiliation(s)
- Andreas Holzinger
- Department of Pediatrics, Division of Clinical Chemistry and Metabolism, Dr. v. Hauner Children's Hospital, Ludwig-Maximilian-University, Munich, Germany.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Choi SI, Song HW, Moon JW, Seong BL. Recombinant enterokinase light chain with affinity tag: expression from Saccharomyces cerevisiae and its utilities in fusion protein technology. Biotechnol Bioeng 2001; 75:718-24. [PMID: 11745150 DOI: 10.1002/bit.10082] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Enterokinase and recombinant enterokinase light chain (rEK(L)) have been used widely to cleave fusion proteins with the target sequence of (Asp)(4)-Lys. In this work, we show that their utility as a site-specific cleavage agent is compromised by sporadic cleavage at other sites, albeit at low levels. Further degradation of the fusion protein in cleavage reaction is due to an intrinsic broad specificity of the enzyme rather than to the presence of contaminating proteases. To offer facilitated purification from fermentation broth and efficient removal of rEK(L) after cleavage reaction, thus minimizing unwanted cleavage of target protein, histidine affinity tag was introduced into rEK(L). Utilizing the secretion enhancer peptide derived from the human interleukin 1 beta, the recombinant EK(L) was expressed in Saccharomyces cerevisiae and efficiently secreted into culture medium. The C-terminal His-tagged EK(L) was purified in a single-step procedure on nickel affinity chromatography. It retained full enzymatic activity similar to that of EK(L), whereas the N-terminal His-tagged EK(L) was neither efficiently purified nor had any enzymatic activity. After cleavage reaction of fusion protein, the C-terminal His-tagged EK(L) was efficiently removed from the reaction mixture by a single passage through nickel-NTA spin column. The simple affinity tag renders rEK(L) extremely useful for purification, post-cleavage removal, recovery, and recycling and will broaden the utility and the versatility of the enterokinase for the production of recombinant proteins.
Collapse
Affiliation(s)
- S I Choi
- Department of Biotechnology, College of Engineering and Bioproducts Research Center, Yonsei University, Seoul 120-749, Korea
| | | | | | | |
Collapse
|