Recombinant Human Beta-defensin 103 protein(DEFB103A) (Active)

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Code CSB-AP003051HU
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Product Details

Purity >98% as determined by SDS-PAGE and HPLC.
Endotoxin Less than 1.0 EU/μg as determined by LAL method.
Activity Fully biologically active when compared to standard. The ED50 as determined by anti-microbial activity against E.coli. is less than 30 μg/ml, corresponding to a specific activity of >33.3 IU/mg.
Target Names DEFB103A
Uniprot No. P81534
Research Area Microbiology
Alternative Names BD 3; BD-3; BD3; beta 103; Beta defensin 103A; Beta defensin 103A precursor; Beta defensin 3; Beta-defensin 103; Beta-defensin 3; D103A_HUMAN; DEF B3; DEFB 103; DEFB 103A; DEFB 3; DEFB-3; DEFB103; DEFB103A; DEFB103B; DEFB3; Defensin; Defensin beta 103A; Defensin beta 3; Defensin like protein; Defensin-like protein; HBD 3; hBD-3; HBD3; HBP 3; HBP3; mBD3
Species Homo sapiens (Human)
Source E.coli
Expression Region 23-67aa
Mol. Weight 5.2 kDa
Protein Length Full Length of Mature Protein
Tag Info Tag-Free
Form Lyophilized powder
Buffer Lyophilized from a 0.2 µm filtered 20 mM PB, pH 7.4, 130 mM NaCl
Reconstitution We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.
and FAQs
Protein FAQs
Storage Condition Store at -20°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time 5-10 business days
Notes Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet & COA Please contact us to get it.

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Target Background

(From Uniprot)
Exhibits antimicrobial activity against Gram-positive bacteria S.aureus and S.pyogenes, Gram-negative bacteria P.aeruginosa and E.coli and the yeast C.albicans. Kills multiresistant S.aureus and vancomycin-resistant E.faecium. No significant hemolytic activity was observed.
Gene References into Functions
  1. this study shows that hBD3 amplifies the response to bacterial DNA in both mouse and human immune cells in a TLR9-dependent manner PMID: 28102569
  2. the role of DEFB103 gene copy number variation (CNV) in ankylosing spondylitis (AS) susceptibility, was investigated. PMID: 26224324
  3. It may be concluded hepatitis B virus up-regulates HBD-3 and A3G expression in vivo and in vitro in placental trophoblast and lack of this up-regulation is possibly associated with intrauterine transmission of hepatitis B. PMID: 25196417
  4. The encoded peptide displays antimicrobial activity against S. aureus and E. faecium. PMID: 11085990
  5. these observations suggest that there may be an interracial difference in DEFB4/103A copy numbers between admixed populations and a relationship between DEFB1 single nucleotide polymorphisms and DEFB4/103A copy number variation PMID: 23194186
  6. Human beta-defensin 3 peptide is increased and redistributed in Crohn's ileitis PMID: 23511030
  7. study demonstrates that HBD2 and 3 activate plasmacytoid dendritic cells by enhancing the intracellular uptake of CpG and self DNA and promote DNA-induced IFN-alpha production in a TLR9-dependent manner PMID: 23776172
  8. Mapping of key residues in the interaction between human Beta-defensin 3 and CXCR4 reveals key defensin motifs involved in protein binding. PMID: 23659571
  9. These results suggest an important role for hBD3 in inducing dendritic cell activation, migration, and polarization. PMID: 22951718
  10. Using a large, unique cohort of pediatric CA-SAB, this study found no significant association between DEFB1 genetic variation or DEFB4/DEFB103 gene copy number and susceptibility for Staphylococcus aureus bacteremia PMID: 22384213
  11. Human beta-defensin 3 exhibits further functions than antimicrobial peptide activity in cultured bone cells, including stimulation of proliferation and differentiation. PMID: 21520074
  12. Data show that high-glucose conditions inhibited the BD3 expression of epidermal keratinocytes. PMID: 21442129
  13. hBD-1 might function as a tumor suppressor gene in oral squamous cell carcinoma, while hBD-2 and -3 might be protooncogenes. PMID: 21280982
  14. extraplacental membranes can react differentialy to the arrival of E. coli, secreting HBD2 and HBD3 mainly in the choriodecidua region. PMID: 21122132
  15. PPARgamma regulates the 1,25D-induced hBD-3 and cathelicidin expression in keratinocytes through the regulation of AP-1 and p38 activity. PMID: 20970965
  16. hBD3 represents a novel NF-kappaB-regulated mediator of CCR7 expression and anti-apoptotic pathways. PMID: 21071608
  17. Inducibility of HBD3 influences the severity of Gram-positive skin infection in humans in vivo. PMID: 20404083
  18. 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
  19. Human pulmonary cells produce hBD-3 upon L. pneumophila infection via a TLR-JNK-AP-1-dependent pathway which may contribute to an efficient innate immune defense. PMID: 20615218
  20. The beta-defensin antimicrobial peptides hBD1, hBD2 and hBD3 were expressed by immature dendritic cells as well as gingival epithelial cells. PMID: 20618959

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Subcellular Location Secreted
Protein Families Beta-defensin family
Tissue Specificity Highly expressed in skin and tonsils, and to a lesser extent in trachea, uterus, kidney, thymus, adenoid, pharynx and tongue. Low expression in salivary gland, bone marrow, colon, stomach, polyp and larynx. No expression in small intestine.
Database Links

HGNC: 15967

OMIM: 606611

KEGG: hsa:414325

STRING: 9606.ENSP00000324633

UniGene: Hs.283082


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