Introduction
Beta-defensin 1 is an antimicrobial peptide that plays a crucial role in the immune system's defense against microbial infections. It exhibits potent activity against a broad spectrum of microorganisms, including bacteria, fungi, and viruses. Beta-defensin 1 is primarily produced by epithelial cells and neutrophils, which are key players in the innate immune response. Its expression is upregulated in response to infection or inflammation, contributing to the body's natural defenses. Beta-defensin 1 is also involved in the regulation of the adaptive immune response, linking the innate and adaptive immune systems. Dysregulation of beta-defensin 1 expression has been implicated in various diseases, including inflammatory bowel disease, cystic fibrosis, and cancer.
Description
Recombinant BD-1 from rat is a single, non-glycosylated polypeptide chain containing 37 amino acids, with a molecular weight of 4.1 kDa. It is produced in E. coli and purified using proprietary chromatographic techniques.
Physical Appearance
Sterile Filtered White lyophilized powder.
Formulation
BD-1 protein was lyophilized from a 0.2µm filtered solution in phosphate-buffered saline (PBS) at pH 7.4.
Solubility
Reconstitute the lyophilized BD-1 in sterile 18 MΩ-cm H₂O to a concentration of at least 100 µg/ml. This solution can be further diluted in other aqueous solutions as needed.
Stability
Lyophilized BD-1 is stable at room temperature for 3 weeks. However, for long-term storage, it is recommended to store it desiccated below -18°C. Upon reconstitution, BD-1 should be stored at 4°C for 2-7 days. For extended storage, add a carrier protein (0.1% HSA or BSA) and store below -18°C. Avoid repeated freeze-thaw cycles.
Purity
Purity greater than 95.0% as determined by: (a) Reverse-phase high-performance liquid chromatography (RP-HPLC) analysis and (b) Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis.
Biological Activity
The biological activity of BD-1 is assessed by its ability to chemoattract CD34+ dendritic cells. The chemoattractant activity is measured using a concentration range of 0.1-1.0 µg/ml.
Synonyms
Beta-defensin 1, BD-1, rBD-1, Defensin beta 1, Defb1.
Amino Acid Sequence
DQYRCLQNGG FCLRSSCPSH TKLQGTCKPD KPNCCRS.