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Affinity purification recombinant protein

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https://www.readbyqxmd.com/read/28921441/purification-and-autoactivation-method-for-recombinant-coagulation-factor-vii
#1
Vladimir Granovski, Marcela C C Freitas, Mario Soares Abreu-Neto, Dimas T Covas
Recombinant coagulation factor VII is a very important and complex protein employed for treatment of hemophiliac patients (hemophilia A/B) who develop inhibitors antibodies to conventional treatments (FVIII and FIX). The rFVII is a glycosylated molecule and circulates in plasma as zymogen of 50 kDa. When activated the molecule is cleaved to 20-30 kDa and has a half-life of about 3 h, needing to be processed fast and efficiently until freeze-drying. Here, we describe a very simple and fast purification sequence for rFVII using affinity FVII Select resin and a dialysis system that can be easily scaled up...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28921439/purification-method-for-recombinant-hg-csf-by-affinity-chromatography
#2
Bruna Samham Archangelo, Elisa Maria de Sousa Russo
The human granulocytic colony-stimulating factor (hG-CSF) acts mainly by promoting the maturation of granulocytes and stimulating their phagocytic and chemotactic activity. It has been used in the treatment of many diseases, in particular in neutropenic conditions. Here, we describe the purification process of the recombinant protein hG-CSF expressed in Pichia pastoris. The protein purification proved to be efficient using the nickel affinity chromatography method described in this chapter.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28921438/purification-methods-for-recombinant-factor-viii-expressed-in-human-liver-sk-hep-cells
#3
Vladimir Granovski, Mario Soares Abreu-Neto, Dimas Tadeu Covas
Coagulation factor VIII is one of the largest proteins attempted to be expressed in recombinant form. A very complex and labile protein which has a very short half-live and need a fast and efficient purification chain. Here, we describe a simple purification sequence using multimodal Capto MMC, affinity FVIII select and ion exchange SP-Fastflow chromatography steps without subjecting the target molecule to mechanical and temperature stress, separating impurities from rFVIII using net charge, hydrophobicity, and affinity of the molecules...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28918196/expression-and-purification-of-human-and-saccharomyces-cerevisiae-equilibrative-nucleoside-transporters
#4
Rebba C Boswell-Casteel, Jennifer M Johnson, Zygy Roe-Žurž, Kelli D Duggan, Hannah Schmitz, Franklin A Hays
Nucleosides play an essential role in the physiology of eukaryotes by acting as metabolic precursors in de novo nucleic acid synthesis and energy metabolism. Nucleosides also act as ligands for purinergic receptors. Equilibrative nucleoside transporters (ENTs) are polytopic integral membrane proteins that aid in regulating plasmalemmal flux of purine and pyrimidine nucleosides and nucleobases. ENTs exhibit broad substrate selectivity across different isoforms and utilize diverse mechanisms to drive substrate flux across membranes...
September 13, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28895364/-development-of-tumor-targeting-phbhhx-nanoparticles-by-phap-mediated-immobilization-of-egfr-targeting-peptide
#5
Fan Fan, Jiangang Ma, Xiaoyun Lu, Teng Niu, Zhimin Wu
PHA granule binding protein phasin (PhaP) has a high affinity for hydrophobic materials and can bind to hydrophobic polymers via strong hydrophobic interaction. In this study, an EGFR-targeting peptide (ETP) was fused with PhaP and the fusion protein ETP-PhaP was produced in recombinant Escherichia coli BL21 (DE3) (pPI-ETP-P) and then purified by Ni affinity purification. The tumor targeting PHBHHx nanoparticles were developed based on PhaP mediated ETP immobilization and the cellular uptake of the ETP-PhaP modified PHBHHx NPs and none modified PHBHHx NPs by cervical cancer cell lines SiHa (EGFR over expressed) and CaSKi (EGFR low expressed) were analyzed...
June 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28882311/production-of-recombinant-tau-oligomers-in-vitro
#6
Benjamin Combs, Chelsea T Tiernan, Chelsey Hamel, Nicholas M Kanaan
The pathological aggregation of the tau protein is a common characteristic of many neurodegenerative diseases. There is strong interest in characterizing the potentially toxic nature of tau oligomers. These nonfibrillar, soluble multimers appear to be more toxic than neurofibrillary tangles made up of filamentous tau. However, reliable production, purification, and verification of tau oligomers can provide certain challenges. Here, we provide a series of methods that address these issues. First, recombinant tau is produced using Escherichia coli, purified through affinity, size-exclusion, and anion-exchange chromatography steps and quantified using an SDS Lowry protein quantitation assay...
2017: Methods in Cell Biology
https://www.readbyqxmd.com/read/28876037/-expression-purification-stability-and-transduction-efficiency-of-gst-sod1-r9-fusion-protein
#7
Jianru Pan, Lunqiao Wu, Huocong He, Lijuan Chen, Ying Su, Lingling Li, Shutao Liu
The fusion of cell permeable peptide TAT and bifunctional antioxidant enzymes, GST (Glutathione sulfur transferase)-TAT-SOD1 (Cu, Zn superoxide dismutase), is an intracellular superoxide scavenger. Compared with SOD1-TAT, GST-TAT-SOD1 has better protective effect on oxidative damage but less transduction efficiency. A novel cell permeable bifunctional antioxidant enzymes with the fusion of GST, SOD1 and polyarginine R9 was constructed for higher transduction efficiency. The full nucleotide sequence of SOD1-R9 was synthesized and inserted into the prokaryotic expression vector pGEX-4T-1 with the GST tag...
May 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28869736/-expression-purification-stability-and-transduction-efficiency-of-full-length-sod2-recombinant-proteins
#8
Jianru Pan, Lijuan Chen, Huocong He, Ying Su, Xiangling Wang, Xian Li, Cuihuang Chen, Lunqiao Wu, Shutao Liu
Superoxide dismutase (SOD) family is necessary to protect cells from the toxicity of reactive oxygen species produced during normal metabolism. Among SODs, manganese-containing superoxide dismutase (Mn-SOD, SOD2) is the most important one. The DNA fragment containing the full nucleotide of full-length human SOD2 was synthesized and inserted into the prokaryotic expression vector pGEX-4T-1 with tag GST. DNA construct was then transformed into Escherichia coli BL21 (DE3) and expression was induced with IPTG at 25 ℃...
July 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28866214/facile-fabrication-of-nickel-immobilized-on-magnetic-nanoparticles-as-an-efficient-affinity-adsorbent-for-purification-of-his-tagged-protein
#9
Zahra Rashid, Hossein Naeimi, Amir-Hassan Zarnani, Fereshteh Mohammadi, Ramin Ghahremanzadeh
In the present research, an efficient, convenient, and inexpensive method for the one-pot synthesis of Fe3O4@Histidine is developed. Histidine is readily loaded on magnetic nanoparticles by one step and simple method without any supplemental linkers. In the structure of Fe3O4@Histidine, histidine covalently immobilized on the surface of Fe3O4, magnetic nanoparticles are able to trap Ni(2+) ions through a strong interaction between nickel and histidines in protein tag. Two coordination sites of nickel are occupied with ligand on the surface of magnetic nanoparticles and four coordination sites have been remained that these sites will be occupied with histidine tag of recombinant protein A...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28860039/the-use-of-bira-bap-system-to-study-the-effect-of-us2-and-us11-on-mhc-class-i-heavy-chain-in-cells
#10
S Gauthami, Deepak Kumar, K S R SivaSai, Nagendra R Hegde
Biotinylation has been extensively used for antibody tagging, affinity-based purification, and in protein/DNA-protein interaction studies. Here we describe the use of biotinylation to study the turn-over of proteins in cells. We use the prokaryotic biotin ligase (BirA) to biotinylate the human leukocyte antigen (HLA)-A2 (A2) heavy chain (HC), which was engineered to contain a biotin acceptor peptide (BAP). Controlled availability of biotin in combination with visualization using streptavidin-conjugated peroxidase made it possible to detect biotinylated BAP-A2...
August 30, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28846630/sequence-analysis-kinetic-constants-and-anion-inhibition-profile-of-the-nacrein-like-protein-cginap2x1-from-the-pacific-oyster-magallana-gigas-ex-crassostrea-gigas
#11
Rosa Perfetto, Sonia Del Prete, Daniela Vullo, Giovanni Sansone, Carmela M A Barone, Mosè Rossi, Claudiu T Supuran, Clemente Capasso
The carbonic anhydrase (CA, EC 4.2.1.1) superfamily of metalloenzymes catalyzes the hydration of carbon dioxide to bicarbonate and protons. The catalytically active form of these enzymes incorporates a metal hydroxide derivative, the formation of which is the rate-determining step of catalytic reaction, being affected by the transfer of a proton from a metal-coordinated water molecule to the environment. Here, we report the cloning, expression, and purification of a particular CA, i.e., nacrein-like protein encoded in the genome of the Pacific oyster Magallana gigas (previously known as Crassostrea gigas)...
August 28, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28846114/identification-of-translationally-controlled-tumor-protein-in-promotion-of-dna-homologous-recombination-repair-in-cancer-cells-by-affinity-proteomics
#12
Y Li, H Sun, C Zhang, J Liu, H Zhang, F Fan, R A Everley, X Ning, Y Sun, J Hu, J Liu, J Zhang, W Ye, X Qiu, S Dai, B Liu, H Xu, S Fu, S P Gygi, C Zhou
Translationally controlled tumor protein(TCTP) has been implicated in the regulation of apoptosis, DNA repair and drug resistance. However, the underlying molecular mechanisms are poorly defined. To better understand the molecular mechanisms underlying TCTP involved in cellular processes, we performed an affinity purification-based proteomic profiling to identify proteins interacting with TCTP in human cervical cancer HeLa cells. We found that a group of proteins involved in DNA repair are enriched in the potential TCTP interactome...
August 28, 2017: Oncogene
https://www.readbyqxmd.com/read/28843001/cell-free-production-of-a-therapeutic-protein-expression-purification-and-characterization-of-recombinant-streptokinase-using-a-cho-lysate
#13
Kevin Tran, Chandrasekhar Gurramkonda, Merideth A Cooper, Manohar Pilli, Joseph Tarris, Nick Selock, Tzu-Chiang Han, Michael Tolosa, Adil Zuber, Chariz Peñalber-Johnstone, Christina Dinkins, Niloufar Pezeshk, Yordan Kostov, Douglas D Frey, Leah Tolosa, David Wood, Govind Rao
The use of cell-free systems to produce recombinant proteins has grown rapidly over the past decade. In particular, cell-free protein synthesis (CFPS) systems based on mammalian cells provide alternative methods for the production of many proteins, including those that contain disulfide bonds, glycosylation and complex structures such as monoclonal antibodies. In the present study, we show robust production of turbo green fluorescent protein (tGFPi and streptokinase in a cell-free system using instrumented mini-bioreactors for highly reproducible protein production...
August 26, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28832667/secretory-expression-and-purification-of-bacillus-licheniformis-keratinase-in-insect-cells
#14
Miaorong Huang, Ruiai Chen, Guangcai Ren
The keratinase (kerA) gene from Bacillus licheniformis PWD-1 was expressed and purified in insect cells. First, the sequence encoding Ker-His-Flag was designed based on the amino acid sequence of the protein and peptide and codon optimization in order to ensure the high expression in insect cells. In the next step, the synthetic DNA was inserted into the pUC57 vector and then sub-cloned in the pFastBac™-1 donor vector by BamHI/HindIII restriction sites. The constructed vector was transformed to E. coli DH10Bac™ cell to generate recombinant bacmid carrying Ker-His-Flag...
2017: PloS One
https://www.readbyqxmd.com/read/28827102/shuffle%C3%A2-t7-strain-is-capable-of-producing-high-amount-of-recombinant-human-fibroblast-growth-factor-1-rhfgf-1-with-proper-physicochemical-and-biological-properties
#15
Marzieh Nasiri, Jalal Babaie, Samira Amiri, Ebrahim Azimi, Shiva Shamshiri, Vahid Khalaj, Majid Golkar, Pezhman Fard-Esfahani
BACKGROUND: Human fibroblast growth factor-1 (FGF-1) has powerful mitogenic activities in a variety of cell types and plays significant roles in many physiological processes e.g. angiogenesis and wound healing. There is increasing demand for large scale production of recombinant human FGF-1 (rhFGF-1), in order to investigate the potential medical use. In the present study, we explored SHuffle™ T7 strain for production of rhFGF-1. METHODS: A synthetic gene encoding Met-140 amino acid form of human FGF-1 was utilized for expression of the protein in three different E...
August 18, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28816641/preparation-of-recombinant-human-thymic-stromal-lymphopoietin-protein
#16
Yanlu Zhang, Liehua Wu, Jingai Yu, JianFeng Mei, Yu Yi, JianShu Chen, Guoqing Ying
Human thymic stromal lymphopoietin (hTSLP) protein plays a central role in inflammation. Characterizing properties of hTSLP requires a recombinant overexpression system that produces correctly folded, active hTSLP. In this report, an efficient overexpression system for production of hTSLP was developed. We constructed expression plasmids of the full-length hTslp gene with or without the signal peptide and transformed the plasmids into E. coli. The design of the recombinant proteins included an N-terminal His-tag, which facilitated purification...
August 17, 2017: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/28805498/gingiskhan%C3%A2-protease-cleavage-allows-a-high-throughput-antibody-to-fab-conversion-enabling-direct-functional-assessment-during-lead-identification-of-human-monoclonal-and-bispecific-igg1-antibodies
#17
Jörg Moelleken, Manuel Endesfelder, Christian Gassner, Sabine Lingke, Simone Tomaschek, Oksana Tyshchuk, Stefan Lorenz, Ulrike Reiff, Michael Mølhøj
The determination of the binding strength of immunoglobulins (IgGs) to targets can be influenced by avidity when the targets are soluble di- or multimeric proteins, or associated to cell surfaces, including surfaces introduced from heterogeneous assays. However, for the understanding of the contribution of a second drug-to-target binding site in molecular design, or for ranking of monovalent binders during lead identification, affinity-based assessment of the binding strength is required. Typically, monovalent binders like antigen-binding fragments (Fabs) are generated by proteolytic cleavage with papain, which often results in a combination of under- and over-digestion, and requires specific optimization and chromatographic purification of the desired Fabs...
August 14, 2017: MAbs
https://www.readbyqxmd.com/read/28801725/optimization-of-soluble-expression-and-purification-of-recombinant-human-rhinovirus-type-14-3c-protease-using-statistically-designed-experiments-isolation-and-characterization-of-the-enzyme
#18
Georgia Antoniou, Irineos Papakyriacou, Christos Papaneophytou
Human rhinovirus (HRV) 3C protease is widely used in recombinant protein production for various applications such as biochemical characterization and structural biology projects to separate recombinant fusion proteins from their affinity tags in order to prevent interference between these tags and the target proteins. Herein, we report the optimization of expression and purification conditions of glutathione S-transferase (GST)-tagged HRV 3C protease by statistically designed experiments. Soluble expression of GST-HRV 3C protease was initially optimized by response surface methodology (RSM), and a 5...
August 11, 2017: Molecular Biotechnology
https://www.readbyqxmd.com/read/28755400/mapping-the-in-vitro-interactome-of-cardiac-sodium-na-calcium-ca-2-exchanger-1-ncx1
#19
Tandekile Lubelwana Hafver, Pimthanya Wanichawan, Ornella Manfra, Gustavo Antonio de Souza, Marianne Lunde, Marita Martinsen, William Edward Louch, Ole Mathias Sejersted, Cathrine Rein Carlson
The sodium (Na(+) )-calcium (Ca(2+) ) exchanger 1 (NCX1) is an antiporter membrane protein encoded by the SLC8A1 gene. In the heart, it maintains cytosolic Ca(2+) homeostasis, serving as the primary mechanism for Ca(2+) extrusion during relaxation. Dysregulation of NCX1 is observed in end-stage human heart failure. In this study, we used affinity purification coupled with MS in rat left ventricle lysates to identify novel NCX1 interacting proteins in the heart. Two screens were conducted using: (1) anti-NCX1 against endogenous NCX1 and (2) anti-His (where His is histidine) with His-trigger factor-NCX1cyt recombinant protein as bait...
September 2017: Proteomics
https://www.readbyqxmd.com/read/28755363/direct-extraction-and-purification-of-recombinant-membrane-proteins-from-pichia-pastoris-protoplasts
#20
Lucie Hartmann, Estelle Metzger, Noémie Ottelard, Renaud Wagner
In the past decade, the methylotrophic yeast Pichia pastoris has proved to be one of the most efficient systems for mass production of recombinant eukaryotic membrane proteins (MPs), leading to the crystallization and structure determination for a variety of them. The actual overexpression of functional MPs achieved with this system is, however, often accompanied by the formation of a variable but significant proportion of misfolded and/or aggregated proteins that are co-extracted and co-purified during the purification process...
2017: Methods in Molecular Biology
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