What is HRV 3C?

HRV-3C protease is a useful tool to cleave recombinant proteins that are expressed as a fusion protein with this sequence, between the carrier domain and the protein of interest. This recombinant version contains a six-histidine tag and can be easily removed by IMAC chromatography.

How much PreScission do I add to protease?

Adjust the amount of PreScission Protease added to at least 10 units/mg of fusion protein. If performing on-column cleavage, note that the capacity of Glutathione Sepharose for GST is typically ≥8 mg/ml. In most purifications, however, the resin is not saturated with fusion protein.

What is thrombin cleavage site?

A thrombin cleavage site (e.g., Leu-Val-Pro-Arg-ll-Gly-Ser; where ll denotes the cleavage site) is widely incorporated within the linker region of fusion or affinity tagged recombinant proteins. After successful cleavage with thrombin, affinity tags or fused proteins can be separated from the target protein.

Where does 3C cleave?

It is used to cleave affinity tags from fusion proteins. The optimum recognition site for this enzyme is the sequence Leu-Glu-Val-Leu-Phe-Gln/Gly-Pro(LEVLFQ/GP) and cleavage occurs between the Gln and Gly-Pro residues.

What does 3C protease do?

The 3C-like protease (3CLpro) or main protease (Mpro), formally known as C30 endopeptidase or 3-chymotrypsin-like protease, is the main protease found in coronaviruses. It cleaves the coronavirus polyprotein at eleven conserved sites. It is a cysteine protease and a member of the PA clan of proteases.

How GST tag is removed?

The thrombin or Factor Xa can be removed from the protein of interest in one step using a HiTrap Benzamidine FF (high sub) column in series after the GSTrap column. In this process, the cleaved, tagged protein and thrombin or Factor Xa is washed from the GSTrap column onto the HiTrap Benzamidine FF (high sub) column.

What is factor IIa?

In the blood coagulation process, prothrombin is proteolytically cleaved to form thrombin (factor IIa) which in turn, acts as a serine protease that converts soluble fibrinogen into insoluble strands of fibrin.

What are poly proteins?

Polyproteins are chains of covalently conjoined smaller proteins that occur in nature as versatile means to organize the proteome of viruses including HIV.

What is the function of 3CLpro?

3CLpro is also called the main protease (Mpro) and plays a major role in the viral replication. PLpro and 3CLpro cleaves the PP chain into 16 NSPs and out of the 16 NSPs generated, 11 NSPs are generated by the 3CLpro, making this protease one of the major targets for developing anti-SARS-CoV drugs8,9.

What is the sequence of GST tag?

GST-tag protein purification protocol Step 1: The cell lysate after cell lysis. The whole proteome of the cell floats inside the lysis buffer. GST tagged proteins are unseparated from the other proteins. Step 2: Addition of GST-tag Affinity MagBeads to the cell lysate.

What is the size of GST tag?

26 kDa
The GST-tag size is 26 kDa and therefore really large compared to other protein affinity tags.

Does TEV need EDTA?

The “standard” reaction buffer for TEV protease is 50 mM Tris-HCl (pH 8.0), 0.5 mM EDTA and 1mM DTT. The duration of the cleavage reaction is typically overnight, although lots of cleavage will happen in the first few hours and prolonged incubation times may not lead to proportional increases in cleavage.

What is activated by platelet factor 3?

Abstract. Platelet factor 3 (PF3) is a platelet membrane component that plays an important role in the activation of the coagulation mechanism. Whenever platelet activation occurred, PF3 is released and participates in thrombin formation.

What is the function of factor 3?

Tissue factor, also called platelet tissue factor, factor III, or CD142, is a protein encoded by the F3 gene, present in subendothelial tissue and leukocytes. Its role in the clotting process is the initiation of thrombin formation from the zymogen prothrombin.