Recombinant Human DEFB4 Protein

Name: Recombinant Human DEFB4 Protein
Brand: Beta LifeScience
SKU: BL-2635NP
Availability: InStock

BL-2635NP: Greater than 95% as determined by reducing SDS-PAGE. (QC verified)

Collections: All products, High-quality 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 Human Beta-Defensin 4 is produced by our E.coli expression system and the target gene encoding Glu23-Pro72 is expressed.
Accession	Q8WTQ1
Synonym	Beta-Defensin 104; Beta-Defensin 4; BD-4; DEFB-4; hBD-4; Defensin Beta 104; DEFB104A; DEFB104; DEFB4; DEFB104B
Gene Background	Defensins are cationic peptides. It is an important ingredient of the innate immune system. β-defensins are expressed on some leukocytes and epithelial surfaces. Four human β-Defensins have been identified to date: BD-1, BD-2, BD-3 and BD-4. β-defensins contain a six-cysteine motif, they forms three intra-molecular disulfide bonds. β-defensins are also chemoattractant towards immature dendritic cells and memory T cells. The β-defensin proteins are expressed as the C-terminal portion of precursors; they are released by proteolytic cleavage of a signal sequence.
Molecular Mass	5.99 KDa
Apmol Mass	9 KDa, reducing conditions
Formulation	Lyophilized from a 0.2 μm filtered solution of 20mM PB, 130mM NaCl, pH 7.4.
Endotoxin	Less than 0.1 ng/µg (1 EU/µg) as determined by LAL test.
Purity	Greater than 95% as determined by reducing SDS-PAGE. (QC verified)
Biological Activity	Not tested
Reconstitution	Always centrifuge tubes before opening. Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100μg/ml. Dissolve the lyophilized protein in distilled water. Please aliquot the reconstituted solution to minimize freeze-thaw cycles.
Storage	Lyophilized protein should be stored at ≤ -20°C, stable for one year after receipt. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. Aliquots of reconstituted samples are stable at ≤ -20°C for 3 months.
Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature listed below.
Usage	For Research Use Only

Target Details

Target Function	Has antimicrobial activity. Synergistic effects with lysozyme and DEFB103.
Subcellular Location	Secreted.
Protein Families	Beta-defensin family
Database References	HGNC: 18115 KEGG: hsa:107984148 STRING: 9606.ENSP00000322191 UniGene: PMID: 11481241 TFF3 activated the epithelial cells in culture to produce beta defensins 2 (hBD2) and beta defensins 4 PMID: 23198942 Data suggest an activation of b-defensin-4 induction, in human knee meniscus by the osteoarthritis inflammatory process as a result of an endogenous antibiotic defense mechanism accompanied by an intrinsic effort of tissue remodeling. PMID: 21879330 Our results suggest that copy number variation of DEFB4 may not contribute to the pathogenesis of Behcet's disease. PMID: 21385545 Analysis of the DEFB4 promoter region shows remarkably high density of sequence variabilities. PMID: 20445567 The variations in the genes encoding human beta-defensin-1 and -2 may be associated with the risk of severe acute pancreatitis. PMID: 20720450 Data show that beta-defensin cluster (DEFB4, DEFB103 and DEFB104) varied between 2 and 9 copies per genome, and high copy numbers (>4) were underrepresented among patients, suggesting that increased copy numbers could protect from CD. PMID: 20483368 We report here the application of small ubiquitin-related modifier (SUMO) fusion technology to the expression and purification of cationic antibacterial peptide hBD4. PMID: 20526896 This study demonstrates, the involvement of NOD1 and DEFB4 in direct killing of Helicobacter pylori bacteria by epithelial cells and confirms the importance of NOD1 in host defence mechanisms against cagPAI(+)Helicobacter pylori infection. PMID: 20039881 The mRNA level of the beta defensin 4 did not differ significantly between the two subgroups. PMID: 20128731 elevated DEFB4 copy number is a risk factor for Crohn's disease PMID: 19809410 There is an association of four common DEFB104 haplotypes with the risk of prostate cancer in two independent patient cohorts. PMID: 18515986

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.