Anti Extracellular Death Factor mouse monoclonal antibody
应用:Elisa:1:1000~5000,IHC:1:50~100
产品名(Product Name)
Anti Extracellular Death Factor mouse monoclonal antibody
货号(Catalog No.)
KL-10233Mo
种类(Category)
Primary antibody
宿主(Host)
Mouse
反应种属(Species specificity)
Escherichia coli
应用实验(Tested applications)
Elisa,IHC
克隆性(Clonality)
Monoclonal
克隆编号(Clone No.)
93-D-4
偶连物(Conjugation)
Unconjugate
免疫原(Immunogen)
NNWNN
别名
Description: mazEF is a toxin-antitoxin stress-induced module which is abundant on the chromosome of most bacteria including pathogens and most extensively studied in Escherichia coli. E. coli mazEF mediated cell death is a population phenomenon requiring the quorum-sensing (QS) ‘Extracellular Death Factor’ (EDF), the E. coli peptide NNWNN. Penta-peptide NNWNN (EcEDF) enhances the endoribonucleolytic activity of E. coli toxin MazF.The newly discovered extracellular death factor (EDF) is a pentapeptide with the sequence NNWNN in Escherichia coli. It was reported that it participated in the cell death process mediated by toxin-antitoxin system mazEF. Reactive oxygen species (ROS) are recently considered as common factors for bactericidal antibiotics-mediated cell death. Previous study indicated that EDF could scavenge hydroxyl radicals and might act as a signal molecule with dual effects, “death” and “survival”. But the structure-activity relationship of EDF and the effects of EDF on the activity of antibiotics remain unclear. In the present study, our results indicated that tryptophan could be the key residue to the hydroxyl radicals-scavenging activity of EDF, and EDF could protect Escherichia coli from killing by bactericidal antibiotics, but not by DNA-damaging or bacteriostatic antibiotics. Our results could provide novel evidence to understand the role of EDF in drug-resistance.
状态(Form)
Liquid
储存溶液(Buffer)
PBS, pH7.4, containing 0.05% proclin300, 50% glycerol.
存放条件(Storage)
Use a manual defrost freezer and avoid repeated freeze thaw cycles.
Store at 4 °C for frequent use.
Store at -20 to -80 °C for twelve months from the date of receipt.
浓度(Concentration)
1mg/ml
亚型(Isotype)
IgG2b
分子量(MW)
56 kDa
纯化方式(Purity)
Protein G purified from mice ascites
产品背景:Catalyzes the oxidation of glucose 6-phosphate to 6-phosphogluconolactone.Probable source of extracellular death factor (EDF, sequence Asn-Asn-Trp-Asn-Asn, NNWNN) following processing and amidation. This pentapeptide stimulates cell death mediated by MazF (PubMed:17962566). Artificial peptides with altered sequence show that NNGNN, GNWNG and NWN no longer stimulate MazF's endoribonuclease activity; other peptides (NNGN, GNWMM, NNWNG, NNNWNNN) retain MazF-stimulating activity. NNWNN, NNGN, GNWMM and NNWNG prevent cognate antitoxin MazE from inhibiting MazF; although NNNWNNN stimulates MazF it does not do so in the presence of MazE. EDF also stimulates ChpB's endoribonuclease activity in vitro; in this case NWN partially stimulates ChpB, whereas NNGNN, GNWNN, NNWNG, GNWNG and NNNWNNN do not. Only the wild-type EDF peptide prevents cognate antitoxin ChpS from inhibiting ChpB
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