Affinity Chromatography Handbook, Vol. 1: Antibodies
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Highly Efficient Purification of Protein Complexes from Mammalian Cells
Highly efficient purification of protein complexes from mammalian cells using a novel streptavidin-binding peptide and hexahistidine tandem tag system: Application to Bruton’s tyrosine kinase Yifeng Li,1 Sarah Franklin,1 Michael J. Zhang,1 and Thomas M. Vondriska1,2,3* 1Department of Anesthesiology, David Geffen School of Medicine, University of California, Los Angeles, CA 2Department of Medicine/Cardiology, David Geffen School of Medicine, University of California, Los Angeles, CA 3Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, CA Received 2 June 2010; Revised 9 September 2010; Accepted 27 October 2010 DOI: 10.1002/pro.546 Published online 15 November 2010 proteinscience.org Abstract: Tandem affinity purification (TAP) is a generic approach for the purification of protein complexes. The key advantage of TAP is the engineering of dual affinity tags that, when attached to the protein of interest, allow purification of the target protein along with its binding partners through two consecutive purification steps. The tandem tag used in the original method consists of two IgG-binding units of protein A from Staphylococcus aureus (ProtA) and the calmodulin- binding peptide (CBP), and it allows for recovery of 20–30% of the bait protein in yeast. When applied to higher eukaryotes, however, this classical TAP tag suffers from low yields. To improve protein recovery in systems other than yeast, we describe herein the development of a three-tag system comprised of CBP, streptavidin-binding peptide (SBP) and hexa-histidine. We illustrate the application of this approach for the purification of human Bruton’s tyrosine kinase (Btk), which results in highly efficient binding and elution of bait protein in both purification steps (>50% recovery). -
Protocols and Tips in Protein Purification
Department of Molecular Biology & Biotechnology Protocols and tips in protein purification or How to purify protein in one day Second edition 2018 2 Contents I. Introduction 7 II. General sequence of protein purification procedures 9 Preparation of equipment and reagents 9 Preparation and use of stock solutions 10 Chromatography system 11 Preparation of chromatographic columns 13 Preparation of crude extract (cell free extract or soluble proteins fraction) 17 Pre chromatographic steps 18 Chromatographic steps 18 Sequence of operations during IEC and HIC 18 Ion exchange chromatography (IEC) 19 Hydrophobic interaction chromatography (HIC) 21 Gel filtration (SEC) 22 Affinity chromatography 24 Purification of His-tagged proteins 25 Purification of GST-tagged proteins 26 Purification of MBP-tagged proteins 26 Low affinity chromatography 26 III. “Common sense” strategy in protein purification 27 General principles and tips in “common sense” strategy 27 Algorithm for development of purification protocol for soluble over expressed protein 29 Brief scheme of purification of soluble protein 36 Timing for refined purification protocol of soluble over -expressed protein 37 DNA-binding proteins 38 IV. Protocols 41 1. Preparation of the stock solutions 41 2. Quick and effective cell disruption and preparation of the cell free extract 42 3. Protamin sulphate (PS) treatment 43 4. Analytical ammonium sulphate cut (AM cut) 43 5. Preparative ammonium sulphate cut 43 6. Precipitation of proteins by ammonium sulphate 44 7. Recovery of protein from the ammonium sulphate precipitate 44 8. Analysis of solubility of expression 45 9. Analysis of expression for low expressed His tagged protein 46 10. Bio-Rad protein assay Sveta’s easy protocol 47 11. -
Ultracentrifugation Techniques for the Ordering of Nanoparticles
nanomaterials Review Ultracentrifugation Techniques for the Ordering of Nanoparticles Xufeng Xu 1,† and Helmut Cölfen 2,* 1 Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5612AE Eindhoven, The Netherlands; [email protected] 2 Physical Chemistry, University of Konstanz, Universitätsstraße 10, Box 714, 78457 Konstanz, Germany * Correspondence: [email protected] † Present address: Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland. Abstract: A centrifugal field can provide an external force for the ordering of nanoparticles. Especially with the knowledge from in-situ characterization by analytical (ultra)centrifugation, nanoparticle ordering can be rationally realized in preparative (ultra)centrifugation. This review summarizes the work back to the 1990s, where intuitive use of centrifugation was achieved for the fabrication of colloidal crystals to the very recent work where analytical (ultra)centrifugation is employed to tailor-make concentration gradients for advanced materials. This review is divided into three main parts. In the introduction part, the history of ordering microbeads in gravity is discussed and with the size of particles reduced to nanometers, a centrifugal field is necessary. In the next part, the research on the ordering of nanoparticles in analytical and preparative centrifugation in recent decades is described. In the last part, the applications of the functional materials, fabricated from centrifugation-induced nanoparticle superstructures are briefly discussed. Keywords: centrifugation; sedimentation; nanoparticle; concentration gradient; non-equilibrium process; superstructure; functional material Citation: Xu, X.; Cölfen, H. Ultracentrifugation Techniques for 1. Introduction the Ordering of Nanoparticles. 1.1. The Era of Microbeads in Gravity Nanomaterials 2021, 11, 333. -
Analysis of Proteins by Immunoprecipitation
Laboratory Procedures, PJ Hansen Laboratory - University of Florida Analysis of Proteins by Immunoprecipitation P.J. Hansen1 1Dept. of Animal Sciences, University of Florida Introduction Immunoprecipitation is a procedure by which peptides or proteins that react specifically with an antibody are removed from solution and examined for quantity or physical characteristics (molecular weight, isoelectric point, etc.). As usually practiced, the name of the procedure is a misnomer since removal of the antigen from solution does not depend upon the formation of an insoluble antibody-antigen complex. Rather, antibody-antigen complexes are removed from solution by addition of an insoluble form of an antibody binding protein such as Protein A, Protein G or second antibody (Figure 1). Thus, unlike other techniques based on immunoprecipitation, it is not necessary to determine the optimal antibody dilution that favors spontaneously-occurring immunoprecipitates. Figure 1. Schematic representation of the principle of immunoprecipitation. An antibody added to a mixture of radiolabeled (*) and unlabeled proteins binds specifically to its antigen (A) (left tube). Antibody- antigen complex is absorbed from solution through the addition of an immobilized antibody binding protein such as Protein A-Sepharose beads (middle panel). Upon centrifugation, the antibody-antigen complex is brought down in the pellet (right panel). Subsequent liberation of the antigen can be achieved by boiling the sample in the presence of SDS. Typically, the antigen is made radioactive before the immunoprecipitation procedure, either by culturing cells with radioactive precursor or by labeling the molecule after synthesis has been completed (e.g., by radioiodination to iodinate tyrosine residues or by sodium [3H]borohydride reduction to label carbohydrate). -
Magresyn ® Protein G
MagReSyn® Protein G Immobilized Protein G magnetic 1.4. Additional Equipment and Materials microparticles Magnetic separator, Vortex mixer, Buffers and solutions, end-over-end mixer (optional) Ordering Information Cat. No. Quantity 2. Immunoglobulin Purification Factors that may affect the attachment of antibodies include the isotype of the MR-PRG002 2 ml immunoglobulin, buffer composition and pH, and the presence of MR-PRG005 5 ml contaminants/interfering compounds. The quantity of microparticles needs to be optimized for each individual application. We recommend the application of excess MR-PRG010 2 x 5 ml ligand to ensure saturation of the Protein G microparticles. The binding efficiency can be determined by comparing the ligand concentration before and after coupling. This product is for research use only MagReSyn® Protein G is compatible with various commonly used buffers, including Tris and Phosphate. Recommended buffers include: Binding/wash buffer - TBS (50 mM Tris pH 7.5, 150 mM NaCl, 0.025% Tween® 20) or PBS (50 mM Phosphate pH 7.5, 150 mM Table of Contents: NaCl, 0.025% Tween® 20); Elution Buffer (Native): 0.1 M glycine pH 2.5 or 2.5% acetic 1. Product Description acid; Elution Buffer (Denaturing): SDS-PAGE electrophoresis buffer. 2. Immunoglobulin Purification 3. Immunoprecipitation NOTE: All reagents should be freshly prepared and of analytical grade to ensure 4. Recommended Storage optimal performance. The procedures, methods and buffer solutions described below serve as an example and are not intended to be limiting. MagReSyn® Protein G is 5. Antibody Binding Guide compatible with a range of different buffers for binding of antibodies. -
Water Specialist for the Oil & Gas Sector Ovivowater.Com
Water Specialist for the Oil & Gas Sector creating value in water through innovation, creativity and expertise ovivowater.com © 2013 GLV Inc. All rights reserved. Ovivo - Industrial Markets Ovivo: A market Leader As society and the global economy demand more and more from water, there is a growing requirement for ever more applications to manage clean water, to create specialist process waters, to treat wastewater, to extract energy from wastewater and to champion the reuse of water. Ovivo - creating value in water through innovation, creativity and Many of the best known, most respected and reliable expertise in clean water, process brand names in the water and wastewater industries are part of Ovivo’s heritage. The combined strengths water, wastewater treatment, waste- of our brands and talents, including Brackett Green, to-energy and water reuse markets Caird & Rayner Clark, Christ Water Technology and across 5 continents. Eimco Water Technologies create one of the most comprehensive bank of technologies in the sector, one of the most impressive list of references, and practical application knowledge. Ovivo aims to become the water partner of choice for clients in the public and private sectors and the leading source of water expertise for engineers and consultants across the globe. Get in touch with some of the best brains in the business. For further information, visit ovivowater.com Ovivo - bringing water to life Copyright © 2013 GLV Inc. All rights reserved. Water Specialist for the Oil & Gas Sector Our Role in your Industry Oil and gas are precious resources. As an Ovivo develops and implements innovative integral element of oil and gas production, water solutions to meet the challenges of treating water and management is especially important. -
Continuous-Flow Centrifugation to Collect Suspended Sediment for Chemical Analysis
1 Table 6. Compounds detected in both equipment blank samples and not in corresponding source blank samples or at concentrations greater than two times the corresponding source blank sample concentration. Prepared in cooperation with the National Water Quality Monitoring Council and [Source data: Appendix A, table A1; Conn and Black (2014, table A4); and Conn and others (2015, table A11). CAS Registry Number: Chemical Abstracts Service Washington State Department of(CAS) Ecology Registry Number® (RN) is a registered trademark of the American Chemical Society. CAS recommends the verifi cation of CASRNs through CAS Client ServicesSM. Method: EPA, U.S. Environmental Protection Agency’s SW 846; SIM, select ion monitoring. Unit: µg/kg, microgram per kilogram; ng/kg, nanogram per kilogram. Sample type: River samples were from the Puyallup River, Washington. Q, qualifi er (blank cells indicate an unqualifi ed detection). J, estimated, result between the Continuous-Flow Centrifugationdetection level and reporting level; toNJ, result Collect did not meet all quantitation Suspended criteria (an estimated maxiumum possible concentration is reported in Result column) U, not detected above the reporting level (reported in the Result column); UJ, not detected above the detection level (reported in the Result column). Abbreviations: na, not Sediment for Chemicalapplicable; Analysis PCBs, polychlorinated biphenyls] Sample type Chapter 6 of CAS River River Commercial Commercial Section D, Water Quality Parameter name Registry Method Unit source equipment -
6511-Protein G-Sepharose
FOR RESEARCH USE ONLY! Protein G-Sepharose rev. 09/16 ° Store at 4 C. Do not freeze. Cat. No. 6511-1 Protein G-Sepharose, 1 ml settled resin 6511-5 Protein G-Sepharose, 5 ml settled resin 6511-25 Protein G-Sepharose, 25 ml settled resin 6511-100 Protein G-Sepharose, 100 ml settled resin 6511-1000 Protein G-Sepharose, 1 L settled resin Support: 6% cross-linked Sepharose beads supplied as 50% slurry (e.g., 1 ml of settled resin is equivalent to 2 ml of 50% slurry) in 20% Ethanol/H2O. Binding Capacity: >20 mg human or rabbit IgG/ml of settled resin. Flow Rate Tested*: 0.85 cm/min. *Test condition: Linear flow rate determined in 2 ml column with internal diameter of 1.5 cm. Introduction: Protein G is a cell wall protein produced by group G streptococcus. Like protein A, this bacteria-derived protein binds with high affinity & specificity to the Fc portion of most mammalian immunoglobulins. Therefore, Protein G has been widely used for IgG purification. BioVision’s Protein G (Cat. # 6510) is a genetically engineered protein containing three Ig-binding regions of native Protein G. The cell wall binding region, albumin binding region and other non-specific regions have been eliminated from the recombinant Protein G to ensure the maximum specific IgG binding. The coupling technique is optimized to give a higher binding capacity for IgG & minimum leaching of recombinant Protein G. In addition, Protein G-Sepharose beads display high chemical & physical stability as well as high flow rate, hydrophilicity & high gel strength. -
Nanosep® Centrifugal Devices - Protocols for Use Nanosep® Centrifugal Devices - Protocols for Use
Contact Us: www.pall.com/contact Nanosep® Centrifugal Devices - Protocols for Use Nanosep® Centrifugal Devices - Protocols for Use Ultrafiltration Fundamentals Purification and Handling of DNA Fragments PCR: Before and After Protein Purification and Handling Miscellaneous Protocols Appendices References Ordering Information Ultrafiltration Fundamentals Background Ultrafiltration (UF) is a membrane separation technique used to separate extremely small particles and dissolved molecules in fluids. The primary basis for separation is molecular size, although other factors such as molecule shape and charge can also play a role. Molecules larger than the membrane pores will be retained at the surface of the membrane (not in the polymer matrix as they are retained in microporous membranes) and concentrated during the ultrafiltration process. Compared to non-membrane processes (chromatography, dialysis, solvent extraction, or centrifugation), ultrafiltration: Is far gentler to the molecules being processed. Does not require an organic extraction which may denature labile proteins. Maintains the ionic and pH milieu. Is fast and relatively inexpensive. Can be performed at low temperatures (for example, in the cold room). Is very efficient and can simultaneously concentrate and purify molecules. The retention properties of ultrafiltration membranes are expressed as Molecular Weight Cutoff (MWCO). This value refers to the approximate molecular weight (MW) of a dilute globular solute (i.e., a typical protein) which is 90% retained by the membrane. However, a molecule’s shape can have a direct effect on its retention by a membrane. For example, linear molecules like DNA may find their way through pores that will retain a globular species of the same molecular weight. There are three generic applications for ultrafiltration: 1. -
Centrifugal Hyperfiltration
TO: Technology Innovation Program Mail Stop 4750 National Institute of Standards and Technology 100 Bureau Drive Gaithersburg, MD 20899-4750 FM: Dirk Forman 125 S. St. Louis Lafayette Louisiana 70506 [email protected] Centrifugal Hyperfiltration A means to economically recover resources from saltwater and wastewater streams with lower the energy cost of producing freshwater and potable water from marginalized water resources. Introduction Reverse Osmosis (RO) is a filtration process for the removal of ionic and organic pollutants from wastewater. Today’s technology of utilization of this filtration process is by large array of high-pressure piping and pressure pumps. This process yields low volumes of filtrated output (permeate), utilizes large areas for pipe array and components and the concentration polarization and membrane fouling hinders the wide application of RO filtration process. Utilizing centrifugal forces and cross flow membranes has potential to change the standard (RO) process to one of portable and high volume water purification. AN AREA OF CRITICAL NATIONAL NEED Ensuring Future Water Supply: As the Nation’s population and economy grow, greater demands are being placed on freshwater resources. At the same time, temporary or permanent drought conditions and water access rights affect regional freshwater availability. Water needs threaten to outstrip available freshwater, now and in the future. Emerging contaminants that must either be removed from distributed water or converted to harmless forms of waste is also pressuring water quality, both in terms of decontamination and disinfection of water supplies. Food contaminations are often traced back to water contaminations, either in the field or in processing. Municipal waste streams and irrigation runoff waste resources that are not recovered.1 Over 97 percent of the Earth's water -- seawater and brackish groundwater -- is too salty to use for drinking water or agriculture. -
Laboratory Filtration Product Guide
Laboratory filtration Product guide gelifesciences.com 1 Welcome to Whatman filtration by GE Healthcare Life Sciences Our reputation, based on a solid foundation of expertise, enables us to support how healthcare is researched and delivered. In laboratories across the globe, the Whatman™ name is synonymous with quality, reliability, and ease of use. Our instinct for simplification accelerates the rate of discovery, reduces costs and saves time. Our products have a reputation for working right the first time – every time, which is why they are specified for the most exacting applications across a wide range of industries for people around the globe. Basic analytical testing In the vast and disparate world of analytical chemistry, Whatman products are used for basic laboratory processes that range from simple clarification to solvent extraction. Products range from filter papers, thimbles and Benchkote™ benchtop protectors, to membrane filters and phase separator papers. Food and beverage Our filter papers are used to prepare food samples prior to a wide range of analyses. Our syringe filters prevent fatty or particulate laden samples from damaging valuable equipment. Our membranes are used to test for harmful bacteria. Pharmaceutical Whatman products enable pharmaceutical companies to increase productivity. Mini-UniPrep™ syringeless filters and vials reduce HPLC sample preparation time and consumables usage, and track-etched and Anopore™ membranes are also vital to extruding liposomes for encasing and targeting drugs. Environmental monitoring Whatman products are cited in EPA, ASTM and ISO protocols for environmental monitoring. Whether it is detecting suspended solids in water, measuring air for dangerous particulates, or supporting asbestos analysis to maintain healthy spaces there is a Whatman filter that is central to the test. -
Cellulose Nanopapers As Tight Aqueous Ultra- Filtration Membranes
Cellulose nanopapers as tight aqueous ultra- filtration membranes Andreas Mautner1*, Koon-Yang Lee2, Tekla Tammelin3, Aji P. Mathew4, Alisyn J. Nedoma5, Kang Li5 and Alexander Bismarck1,6,* 1 Polymer & Composite Engineering (PaCE) Group, Department of Chemical Engineering, Imperial College London, South Kensington Campus, SW7 2AZ London, United Kingdom 2 Department of Chemical Engineering, University College London, Torrington Place, WC1E 7JE London, United Kingdom 3 . VTT Technical Research Centre of Finland, Biologinkuja 7, FL-02044 Espoo, Finland 4 Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 Luleå, Sweden 5 Department of Chemical Engineering, Imperial College London, South Kensington Campus, SW7 2AZ London United Kingdom 6 Institute for Materials Chemistry & Research, Polymer & Composite Engineering (PaCE) Group, Faculty of Chemistry, University of Vienna, Währingerstr. 42, A-1090 Vienna, Austria * Corresponding authors: e-mail: [email protected], [email protected] Abstract: Recently, we have demonstrated the use of wood-derived nanocellulose papers, herein termed nanopapers, for organic solvent nanofiltration applications. In this study, we extend the use of these nanopapers to tight ultrafiltration (UF) membranes. The feasibility of such nanopaper-based UF membranes intended for use in water purification is shown. Four types of nanocelluloses, namely bacterial cellulose, wood-derived nanocellulose, TEMPO-oxidized cellulose nanofibrils and cellulose nanocrystals, were used as raw materials for the production of these nanopaper-based membranes. The resulting nanopapers exhibit a transmembrane permeance in the range of commercially available tight UF membranes with molecular weight cut-offs ranging from 6 to 25 kDa, which depends on the type of nanocellulose used.