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Cytoskeleton/His-Arf6 Protein: amino acids 13-175 (Human recombinant)/1x100 µg/CS-FR06
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Details* Limited stock available. If stock is not available, Cytoskeleton will produce a new batch upon request. Minimum order will apply. Inquire for more information. Product UsesStudy of Arf6 interacting proteins, Effectors, GAPs and GEFs. Identification of Arf6 interacting proteins. Positive control for Western blots. MaterialsHuman Arf6 protein (Acc.# AAH08918), lacking the N-terminal 13 amino acids, has been produced in a bacterial expression system. The recombinant protein contains six histidine residues at its amino terminus (His-tag). The molecular weight of His-Arf6 is approximately 21 kDa and is supplied as a white lyophilized powder. StorageBefore reconstitution, briefly centrifuge to collect the product at the bottom of the tube. The protein should be reconstituted to 5 mg/ml with Milli-Q water (2 µl water per 10 µg protein). When reconstituted, the protein will be in the following buffer: 20 mM Tris pH 7.6, 0.5 mM MgCl2, 5% (w/v) sucrose and 1% (w/v) dextran. In order to maintain high biological activity of the protein it is strongly recommended that the protein solution be supplemented with DTT to 1 mM final concentration, aliquoted into "experiment sized" amounts, snap frozen in liquid nitrogen and stored at -70°C. The protein is stable for six months if stored at -70°C. The protein must not be exposed to repeated freeze-thaw cycles. The lyophilized protein is stable at 4°C desiccated (<10% humidity) for one year. PurityProtein purity is determined by scanning densitometry of Coomassie Blue stained protein on a 4-20% polyacrylamide gradient gel. His-Arf6 protein was determined to be 80% pure. (see Figure 1). Figure 1. Arf6 Protein Purity Determination(SDS-gel image to be added)Legend: A 20 µg sample of recombinant His-Arf6 protein (molecular weight approx. 21 kDa) was separated using a 4-20% SDS-PAGE system and stained with Coomassie Blue. Protein quantitation was determined using the Precision Red Protein Assay Reagent (Cat. # ADV02). Mark12 molecular weight markers are from Life Technologies Inc. Biological Activity AssayThe biological activity of His-Arf6 can be determined from its ability to catalyze the exchange of GDP for GTP. The human ARNO protein is an exchange factor for Arf6, and is used with the RhoGEF exchange assay biochem kit (Cat. # BK100) to monitor the exchange ability of His-Arf6. Note: Bodipy-FL-GDP or GTP can also be used to follow exchange with a large signal to noise ratio. Stringent quality control ensures that the exchange rate (Vmax) of His-Arf6 is enhanced two fold in the under the conditions described below. Reagents1. Recombinant His-Arf6(14-175) protein (Cat. # FR06)2. Recombinant His-ARNO protein (Cat. # GE07) 3. 2X Exchange Buffer (50 mM Tris pH 7.5, 100 mM NaCl, 4mM MgCl2 , and 10 µM mant-GTP).NOTE: The 2x Exchange Buffer is NOT the same buffer found in the RhoGEF exchange assay biochem kit (Cat # BK100). Equipment1. Fluorescence spectrometer. Program the fluorimeter at an excitation filter wavelength of 360 nm and emission filter wavelength of 440 nm. The bandwidth of the filter should be no more than 20 nm or significant background noise and reduced sensitivity of the assay may be experienced. The fluorimeter should be at 20°C and set on kinetic mode, it is recommended to take a reading once every 30 seconds for at least 60 cycles. We recommend a TECAN SpectroFluro plus (GmbH, Austria) or Perkin-Elmer LS spectrometer.2. Corning 96-well half area plates (Cat. # 3686) or other plate with low protein binding surface. Method1. Resuspend the His-ARNO protein (Cat. # GE07) to 2 mg/ml (50 µM) with the addition of 25 µl Milli-Q water. Keep on ice.2. Resuspend the His-Arf6(14-175) protein as described in the reconstitution section for a 200 µM solution. Dilute an aliquot to 50 µM with Milli-Q water. Keep on ice.3. Add the following components together into four wells of a 96 well half area plate. Two wells will be the control reactions, and the others the test samples. Mix the components by gentle pipeting.Volume Per WellReagent75 µl2x Exchange Buffer21 µl50 µM His-Arf6 (14-175)53 µulMilli-Q Water4. Insert the plate into the fluorimeter and begin reading.5. After 5-10 cycles (150-300 seconds, you can set this time as time zero), add 6 µl of the His-ARNO protein (50 µM) to the test wells and 6 µl of Milli-Q water to the control wells. Quickly mix the solutions by swirling with the tip or use the automix function where available. It is important to keep this mixing step as short as possible to obtain a smooth curve. Resume reading for at least 20 minutes.6. The exchange rate can be calculated by reducing the data to Vmax with software that accompanies the plate reader. The exchange curve can be generated by exporting the raw data to Microsoft Excel.7. A typical exchange curve is shown in Figure 2Figure 2. Arf6/ARNO GDP/GTP exchange assay. Legend: Arf6 protein (7 µM) was mixed with exchange buffer and aliquoted to two wells of a 96-well half area plate. After 5 cycles of reading in a fluorimeter, ARNO protein (2 µM) or Milli-Q water were added to the wells and the reactions were monitored for 30 min as described in the method. Red circles represent the data with His-ARNO and the blue circles represent the control reactions lacking His-ARNO. Note: Bodipy-FL-GDP or GTP can also be used to follow exchange with a large signal to noise ratio. AboutFor product Datasheets and MSDSs please click on the PDF links below.CitationsComing soon! For the most recent publications citing this product, please contact our Technical Service department at tservice@cytoskeleton.comFaqsComing soon! If you have any questions concerning this product, please contact our Technical Service department at tservice@cytoskeleton.com
Cytoskeleton,Inc.成立于1993年。自成立以来,我们一直在不断扩大产品范围。
Cytoskeleton,Inc.很高兴为药物筛选,信号转导和细胞骨架研究提供广泛的试剂盒和产品。我们专注于纯化蛋白的生产和易于使用的试剂盒,以研究生化和细胞过程。我们的试剂盒既可用于基础研究或小型筛查的少量样品,也可用于大型筛查的高通量规模
除了我们现有的产品外,我们还提供产品系列中微管,微管蛋白,运动蛋白,小G蛋白效应物,GAP,GEF和其他几种蛋白的药物筛选服务。有关更多信息,请参见我们的药物筛选服务页面。
如果您想从市场上购买到特定产品,请随时与我们联系。我们在这里为您提供帮助。
由于我们的科学家在各自的专业领域都有多年的工作经验,因此我们能够提供高质量的产品。自1993年成立以来,我们以合理的价格生产优质的产品而闻名。
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