Recombinant Helicobacter Pylori Vacuolating Cytotoxin Autotransporter (VACA) Protein (His-B2M)

Name: Recombinant Helicobacter Pylori Vacuolating Cytotoxin Autotransporter (VACA) Protein (His-B2M)
Brand: Beta LifeScience
SKU: BLC-04356P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

Based on the SEQUEST from database of E.coli host and target protein, the LC-MS/MS Analysis result of this product could indicate that this peptide derived from E.coli-expressed Helicobacter pylori (strain ATCC 700392 / 26695) (Campylobacter pylori) vacA.

Collections: Fc receptors, Other recombinant proteins, Recombinant proteins

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.

Submit an inquiry today to inquire about all available size options and prices! Connect with us via the live chat in the bottom corner to receive immediate assistance.

Product Overview

Description	Recombinant Helicobacter Pylori Vacuolating Cytotoxin Autotransporter (VACA) Protein (His-B2M) is produced by our E.coli expression system. This is a protein fragment.
Purity	Greater than 90% as determined by SDS-PAGE.
Uniprotkb	P55981
Target Symbol	VACA
Synonyms	vacA; HP_0887; Vacuolating cytotoxin autotransporter [Cleaved into: Vacuolating cytotoxin; Vacuolating cytotoxin translocator]
Species	Helicobacter pylori (strain ATCC 700392 / 26695) (Campylobacter pylori)
Expression System	E.coli
Tag	N-6His-B2M
Target Protein Sequence	KYEKPTNVWANAIGGTSLNNGGNASLYGTSAGVDAYLNGEVEAIVGGFGSYGYSSFNNQANSLNSGANNTNFGVYSRIFANQHEFDFEAQGALGSDQSSLNFKSALLRDLNQSYNYLAYSAATRASYGYDFAFFRNALVLKPSVGVSYNHLGSTNFKSNSNQVALKNGSSSQHLFNASANVEARYYYGDTSYFYMNAGVLQEFANFGSSNAVSLNTFKVNAAHNPLSTHARVMMGGELKLAKEVFLNLGFVYLHNLISNIGHFASNLGMRYSF
Expression Range	1018-1290aa
Protein Length	Partial
Mol. Weight	43.6kDa
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	Induces vacuolation of eukaryotic cells. Causes ulceration and gastric lesions.
Subcellular Location	[Vacuolating cytotoxin autotransporter]: Periplasm.; [Vacuolating cytotoxin]: Secreted. Cell surface.; [Vacuolating cytotoxin translocator]: Cell outer membrane; Multi-pass membrane protein.
Database References	KEGG: hpy:HP0887 STRING: 85962.HP0887

Gene Functions References

Helicobacter pylori VacA induces autophagic cell death in gastric epithelial cells via the endoplasmic reticulum stress pathway. PMID: 29238039
The results indicate that cortactin is involved in the regulation of apoptosis induced by VacA in gastric cells. PMID: 26289258
Genotype testing of vacA s- and m- region will be useful in screening susceptible individuals for duodenal ulcer development. PMID: 25063579
These results suggested that cagA and vacA gene expression is upregulated in Helicobacter pylori, especially by host cell contact, and Fur has a role in the upregulation. PMID: 24020886

FAQs

Please fill out the Online Inquiry form located on the product page. Key product information has been pre-populated. You may also email your questions and inquiry requests to sales1@betalifesci.com. We will do our best to get back to you within 4 business hours.

Feel free to use the Chat function to initiate a live chat. Our customer representative can provide you with a quote immediately.

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.