Recombinant Pseudomonas Aeruginosa Exotoxin A (ETA) Protein (His-KSI)

Beta LifeScience SKU/CAT #: BLC-00842P
Greater than 85% as determined by SDS-PAGE.
Greater than 85% as determined by SDS-PAGE.

Recombinant Pseudomonas Aeruginosa Exotoxin A (ETA) Protein (His-KSI)

Beta LifeScience SKU/CAT #: BLC-00842P
Our products are highly customizable to meet your specific needs. You can choose options such as endotoxin removal, liquid or lyophilized forms, preferred tags, and the desired functional sequence range for proteins. Submitting a written inquiry expedites the quoting process.

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Product Overview

Description Recombinant Pseudomonas Aeruginosa Exotoxin A (ETA) Protein (His-KSI) is produced by our E.coli expression system. This is a protein fragment.
Purity Greater than 85% as determined by SDS-PAGE.
Uniprotkb P11439
Target Symbol ETA
Species Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)
Expression System E.coli
Tag N-6His-KSI
Target Protein Sequence ALLERNYPTGAEFLGDGGDISFSTRGTQNWTVERLLQAHRQLEERGYVFVGYHGTFLEAAQSIVFGGVRARSQDLDAIWRGFYIAGDPALAYGYAQDQEPDARGRIRNGALLRVYVPRSSLPGFYRTGLTLAAPEAAGEVERLIGHPLPLRLDAITGPEEEGGRLETILGWPLAERTVVIPSAIPTDPRNVGGDLDPSSIPDKEQAISALPDYASQPGKPPREDLK
Expression Range 413-638aa
Protein Length Partial
Mol. Weight 39.9 kDa
Research Area Microbiology
Form Liquid or Lyophilized powder
Buffer Liquid form: default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution Briefly centrifuged the vial prior to opening to bring the contents to the bottom. Reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL. It is recommended to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. The default final concentration of glycerol is 50%.
Storage 1. Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. 2. Avoid repeated freeze-thaw cycles. 3. Store working aliquots at 4°C for up to one week. 4. In general, protein in liquid form is stable for up to 6 months at -20°C/-80°C. Protein in lyophilized powder form is stable for up to 12 months at -20°C/-80°C.
Notes Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Target Details

Target Function An NAD-dependent ADP-ribosyltransferase (ADPRT). Catalyzes the transfer of the ADP ribosyl moiety of oxidized NAD (NAD(+)) onto eukaryotic elongation factor 2 (eEF-2) thus arresting protein synthesis. Has an LD(50) of 65 ng/ml against the human lung epithelial cell line C38.
Database References

Gene Functions References

  1. Our results show that the chimeric EGFETA toxin is extremely effective against EGFRpositive cancers and raises the potential to further develop this chimera for use in targeting EGFRpositive tumours resistant to monoclonal antibodies. PMID: 30226622
  2. Studied the presence of virulence genes (B-type flagellin [fliC], exotoxin A [toxA] and phzS) using molecular typing among isolates of Pseudomonas aeruginosa cultured from specimens from diabetic foot. Found fliC, toxA and phzS genes can play important roles in tissue penetration, tissue damage and survival. PMID: 29078729
  3. Data indicate that anti-EpCAM fusion toxin for tumor targeting by click PEGylation suggest new perspectives for effective cancer-related therapy. PMID: 24184633
  4. Use of the antibodies produced for testing toxigenicity of P. aeruginosa strains as well as detection of anatoxin in the technological process of production of prophylaxis preparations based on exotoxin A is expected. PMID: 24738291
  5. The highest level was observed for IL-1 and IL-6 after administration of recombinant proteins OprL, OprF, OprF-1, aTox. PMID: 24605680
  6. ATF-7 and ZIP-2 transcription factors are required for preventing ToxA-mediated lethality. PMID: 22520464
  7. These results indicated that exotoxin A acts as a virulence factor in Bombyx mori and that other virulence factor(s) are involved during the late stages of infection. PMID: 21945328
  8. When combined with IL-13Ralpha2 DNA cancer vaccine, Pseudomonas aeruginosa exotoxin A mediates synergistic antitumor effects on tumor growth and metastasis in established murine breast carcinoma and sarcoma tumor models. PMID: 22013118
  9. Norepinephrine represses the expression of toxA and the siderophore genes. PMID: 19686346

FAQs

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.

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