cleavage

A New C-Terminal GST Vector for Protein Production in S. pombe

...n system, the GST tag can be removed byproteolytic cleavage with thrombin or enterokinase. Expression and pur...fication, a sequence coding for therecognition and cleavage sites for enterokinase and thrombin have beenengineered between the MCS and the GST gene. Cleavage o...

New Yeast Cloning System for Producing Proteins with Native Amino Acid Sequences

...te, resulting in aseamless junction between the EK cleavage site and the initiation codon (ATG) ofthe gene to ...the GST affinity tag may be removed by proteolytic cleavage with EKto yield polypeptides with native amino acid sequence. Cleavage with thrombinyields the recom...

Restriction Endonucleases Undergo Rigorous QC Testing to Ensure Optimal Performance

...ants that can potentially interfere witheither DNA cleavage or subsequent reactions that use digested DNA (i.e.,ligation or sequencing reactions). Such contaminants might include othersite-specific endonucleases that produce unwanted DNA fragments, exonucleasesthat destroy the integrity of the cut site by cle...

High-Level Protein Expression, One-Column Purification, and FLAG Epitope Tagging in E. coli

...nthe codon choice immediately downstream of the EK cleavage site, and thuspredetermine the N-terminal amino ac...e seamlessly fused immediately downstream ofthe EK cleavage site, thereby allowing the recovery of proteins from EK cleavagereactions that have native N-termina...

Yeast Protein Production System Features High Yields and One-Step Purification

... tag can be removed fromthe protein by proteolytic cleavage with either bovine enterokinase or thrombin. As n...). Figure 5 shows an example of protease cleavage of a GST-MEK1 fusion protein. The GST tag was efficiently detached from the MEK1 moiety by d...

Efficient Cleavage of Fusion Proteins to Yield Native Amino Termini

...hat have noextraneous amino acids derived from the cleavage site. Thus, recombinantproteins with native amino ...ition site, (aspartic acid) 4 lysine. This cleavage produces fusion proteins that have native amino termini following removal of N-terminal tags...

Expression and Purification of Recombinant Proteins That Have Native Amino Acid Sequence

...he N terminus of the inserted polypeptidesequence, cleavage of fusion proteins produced in the pCAL-n-EK vecto...amino acids derived from thefusion tag. Therefore, cleavage results in the production of native protein. Stratagene's Affinity protein expression and purificat...

Constructing Directional cDNA Libraries from Limited Amounts of RNA

...products are clonedwithout endonuclease reactions, cleavage of inserts at internal restrictionsites is avoided. On another exciting front, the kit can be used to make cDNA libraries fromtissue samples isolated by laser-capture microdissection (LCM). 4 Thistechnique, developed at the National Institutes of H...

Mammalian and Bacterial Expression in One Vector

...cteria. In addition, the thrombin protease cleavage site allows cleavage to occur in the presence of thrombin for applications where removal of the affinity tag is d...

Sequence-Validated and Expression-Tested Human cDNA in a Dual Expression Vector

...n encoded by the cDNA insert, the thrombin cleavage site, three copies of the c-myc epitope ta... The fusion protein also contains a thrombin cleavage site between GFP and the c-myc epitope. Following purification, the c-myc epitope and HIS6 ...

HotStarTaq PCR Handbook

...ounds of amplification is destroyed by cleavage during the initial incubation step that activates HotStarTaq DNA Polymerase. Another approach to preventing amplification of contaminating DNA is to treat individual reaction mixtures with DNase I or...

Identification of Low-Level Oxidation Products in Calmodulin Using NanoSpray Ion Trap Mass Spectrometry

...this analysis involves Met-specific chemical cleavage (by cyanogen bromide, CNBr) or proteolytic digesti...tebrate CaM. The arrows indicate theoretical cleavage sites for trypsin, while the letters indicate tryptic fragments observed in oxidized CaM. ...

Structural Analysis of Glycosylated Peptides in Complex Mixtures with Ion Trap MSn

...saccharide. The difference in mass following cleavage is used to infer the carbohydrate constituents ... Theoretical m/z values for all possible cleavage products of the glycoform were added to the database to enable TurboSEQUEST to automatic...

Characterization of Protein Oligosaccharides Using MSn

...ely low abundance of these crossringfragments, and cleavage of especially labile bondscan suppress the formati...ously infused into the instrument. Favorable cleavage sites lie adjacent to GlcNAc residues, particularly terminal GlcNAcs, resulting in the preferr...

PCR Core KitPLUS

...ence of dUTP). Incubation conditions for cleavage of uracil-glycosidic bonds: 20C, 110 min. Thermal stability (pH 8.3): half-life at 40C, 2 min; half-life at 45C, 0.5 min. MgCl 2 concentration: 2.5 mM. dNTP concentration: 200 M dNTPs; 600 M dUTP. ...

Uracil-DNA Glycosylase

... apyriminic sites formed by UNG are susceptible to cleavage by heat under alkaline conditions (carry-ove...TP). Incubation conditions for cleavage of uracil-glycosidic bonds: 20C, 110 min. Thermal stability (pH 8.3)...

Preventing Carry-over Contamination with Uracil-DNA Glycosylase

... prior to PCR amplification and subsequent cleavage of apyriminic polynucleotides at elevated temperature (95C) under alkaline conditions (during the initial denaturation step) will remove contaminating U-DNA from the sample (see figure below). This method, of course, requires ...

Cloning Based on Efficient Three-Fragment Assembly DNA Ligation

... (Figure 1). Both insert fragmentswere obtained by cleavage of cloned DNA withthe endonucleases Apa LI, Bam HI, and Alu I. TheApa LI/Alu I fragment of insert A and the Alu I/Bam HIfragment of insert B were purified after separation onan agarose gel. One microgram of DNA in a totalvolume of 10 l was used in th...

A Further Step in Understanding Apoptosis Direct Detection of PARP Cleavage

...ses (cysteinyl-asparticacid proteases) followed by cleavage of the caspase substrates[1]. The 113-kDa poly(ADP...xic agents. Detection of a 89-kDa or 24-kDacaspase cleavage fragment of PARP-1 was shown to bea hallmark of apoptosis [2]. In contrast to measuringactive caspas...

Apoptosis detection by annexin V and active caspase-3 with the Agilent 2100 bioanalyzer

...lls undergoingapoptosis by self-proteolysis and/or cleavage by another protease8.Active caspase-3, a markerfor cells undergoing apoptosis,consists of a heterodimer of 17and 12 kDa subunits which isderived from the 32 kDa proenzyme9.A convenient and broadlyaccepted method to study theactivity of caspase-3 duri...

High resolution DNA analysis with the DNA 500 and DNA 1000 LabChip kits

...er relevantapplications include competitivePCR and cleavage based applicationssuch as RFLP. Also, theresolution in the lower range, i.e.below 100 bp, is significantlyincreased compared to the othertwo DNA LabChip kits, making itpossible to distinguish betweenfragments that are very similar insize. Since the D...

Double-Affinity Purification of GST-His Tagged Proteins Using Vivapure 8-to-96 Well Cobalt-Chelate Kit

...ione-S-Transferase; HIS: poly-histidine; TEV site: cleavage site for TEV protease Lysate preparation The pellet was lysed using the resuspension buffer (PBS, lysozyme 1mg/ml, DNase 1g/ml, 5 mM MgCl2), incubated for 30 min under agitation and the supernatant was recovered by centrifugation (3 min at ...

Avoid siRNA Design Altogether!

... termini and overhangs of RNase III cleavage products are thus the same as those produced by Dicer in the in vivo RNAi pathway. The population of siRNAs produced by the Silencer siRNA Cocktail Kit (RNase III) ...

Dicer vs. RNase III for Preparation of siRNA Cocktails

...nd is the enzyme responsible for cleavage of long dsRNAs to siRNA in the e... responsible for digesting long dsRNA, its cleavage products range from ~12 to 15 bp in length with termini identical to ...

Rapidly Prepare Probes and Markers for Small RNA Analysis

... (provided), then diluted into a cleavage reagent that generates the molecular weight marker set in a 5 minute, room temperature reaction. For exact determination of RNA size, a single ribonucleotide ladder (Figure 1) can also be generate...

Translate High Yields of Biologically Active Proteins

...as determined by measuring the proteolytic cleavage of the fluorogenic substrate Ac-DEVD-AFC for 1 hr in a 96 well plate reader (400 nm excitation wavelength, 505 nm emission wavelength). Casein kinase 1 (CK1): Activity was determined by phosphorylation of casein kinase 1 subst...

Visualizing siRNA in Mammalian Cells: Fluorescence Analysis of the RNAi Effect

...ted, that message is then targeted for cleavage leading to gene silencing. 2. Stra...lar amount of siRNA required to direct cleavage of the target gene. 3. Duration Data presented here suggests siRNA is maintained...

Your Data: Silencing of a Pro-apoptotic Transcription Factor Using Synthetic siRNA

...stranded RNA directs the ATP-dependent cleavage of mRNA at 21 to 23 nucleotide intervals. Cell. 101(1) : 2533. 2. Elbashir SM, Lendeckel W, and Tusch T (2001) RNA interference is mediated by 21- and 22- nucleotide RNAs. Genes Dev. 15(2) : 188...

Northern Analysis: The Basics

... compromised. For example, even a single cleavage in 20% of 4 kb target molecules will decrease the returned signal by 20%. Thus, RNase-free reagents and techniques are essential. Second, a standard Northern procedure is, in general, less ...

Nuclease Protection Assays: The Basics

... homologous to target RNA to prevent cleavage of the probe:target hybrid by nuclease. This means that partially related sequences (e.g., probe and target RNA from different species) usually cannot be used. Steps Involv...

RNA Interference and Gene Silencing: History and Overview

...s are apparently produced in vivo by cleavage of dsRNA introduced directly or via a transgene or...rresponding to the introduced dsRNA and that cleavage occurred at 21-23 nucleotide intervals (<A href="#26">26 ). Rapidly, the mechani...

Continuous-Elution Electrophoresis for Purification of the Baculovirus-Expressed Coronavirus Structural Proteins, Rev A

...previously reported (Shoup et al., 1997) or cleavage product. Similarly, a minor protein band in addition to the full size recombinant TGEV-M protein was detected by western blot (Figure 1C, lanes 3 and 5). The results from this study suggest that CE-PAGE can be a useful semi...

Temporal Temperature Gradient Electrophoresis: A Powerful Technique to Screen Mutations

...n truncation test (PTT), 6 and enzymatic/chemical cleavage analysis, are the major detection methods used to screen mutations. The DCode universal mutation detection system (Figure 1) can be used to screen mutations by any of the techniques mentioned above and by a new technique...

Performance Comparison of the Experion Automated Electrophoresis System and a Competing Automated System for Protein Analysis, Rev A

...ntial expression studies, degradation assessments, cleavage investigations, and analysis of immunoprecipitation experiments. This tech note presents a comparison of the performance of the Experion Pro260 analysis kit with the Agilent protein 200 plus LabChip kit, which is employ...

Efficient Primary Structure Elucidation of Disulfide-bridged Peptides

... the cysteine residues and the absence of suitable cleavage sites within the amino-acid sequences of CSTXpepti...tic cleavage, they require the presence of defined cleavage sites between two consecutive disulfide bridges. Consequently, the basically unspecific gas-phase di...

Monitoring fluorescence resonance energy transfer (FRET) between GFP fusions in lysates of the yeast Saccharomyces cerevisiae using the Varian Cary Eclipse

...hin the cuvettes was set to 25C to promote cleavage of the peptide linker by trypsin (Figure 2). Using the Scan application, BFP was specifically excited using light of 360nm, and emission spectra for the fusion protein were recorded from the range 400550nm. Further emission sc...

Fluorometric Protease Assays in the SpectraMax Gemini Microplate Spectrofluorometer: Example Using Caspase3 (MaxLine Application Note #35)

...phore or fluorophore is attached near the peptides cleavage site and enzymatic activity is detected by the inc...sed for various protease assays. 14 In each case, cleavage of the fluorophore results in increased fluorescence, with a shift of excitation and emission maxima...

Analysis of a Verapamil Microsomal Incubation using Metabolite ID and Mass FrontierTM

...ely the result of a three step process where alkyl cleavage at the tertiary amine group of verapamil initially...cause any metabolite resulting from the same alkyl cleavage would most likely correlate better with this reference than with the parent drug. Using the logic de...