产品编号:G120-1
产品描述:Recombinant Human GDNF
反应种属:
实验方法:
标记:
规格:1mg
供应商:Leinco
价格(RMB):面议
订购:
说明书:
Recombinant Human Glial-Derived Neurotrophic Factor (GDNF)
Purified No Carrier Protein
(ATF-1, ATF2, HFB1-GDNF)
Prod. No.: G120
Source E. coli
Pkg. Size: 1 mg, 2 µg, 10 µg, 100 µg
Storage: -20°C to -70°C
Description
Background:
Glial cell line-derived neurotrophic factor (GDNF), also known as ATF-1, is a glycosylated, disulfide-bonded homodimer and member of the TGF-β superfamily (1). It is structurally related to artemin, neurturin and persephin. GDNF potently promotes the survival of many types of neurons, most prominently, dopaminergic and motorneurons. It also regulates kidney development, spermatogenesis and it affects alcohol consumption (2). GDNF is expressed in Sertoli cells, type 1 astrocytes, Schwann cells, neurons, pinealocytes and skeletal muscle cells. It signals through a multicomponent receptor system composed of a RET oncogene and one of the four GFR-α receptors (3). GDNF protects and repairs dopamine-containing neurons, which degenerate in Parkinsons disease, and motor neurons, which die in amyotrophic lateral sclerosis. The use of GDNF in the treatment of Parkinsons disease has shown promise in the clinic by improving symptoms such as bradykinesia, rigidity and postural instability (4). Treatment of spinal cord injuries with GDNF has also produced neurological improvement.
Source
E. coli
Molecular Weight
The predicted molecular weight of Recombinant Human GDNF is Mr 30 kDa.
State of Matter
Lyophilized
Formulation
This recombinant protein was 0.2 µm filtered and lyophilized from modified Dulbecco’s phosphate buffered saline (1X PBS) pH 7.2 – 7.3 with no calcium, magnesium, or preservatives.
Purity
>98% by SDS-PAGE and HPLC
Storage and Stability
This lyophilized protein is stable for six to twelve months when stored desiccated at -20°C to -70°C. After aseptic reconstitution, this protein may be stored at 2°C to 8°C for one month or at -20°C to -70°C in a manual defrost freezer. Avoid Repeated Freeze Thaw Cycles. See Product Insert for exact lot specific storage instructions.
Endotoxin
<0.1 EU/µg as determined by the LAL method
Biological Activity
The biological activity of Human GDNF was determined by its ability to support the survival and stimulate neurite outgrowth of cultured embryonic chick dorsal root ganglia neurons (Davies, A.M., 1989, Neurotrophic Factor Bioassay Using Dissociated Neurons, Nerve Growth Factor, Rush, R.A., ed., John Willey and Sons, Ltd., p.95). The expected ED50 for this effect is typically 1 - 3 ng/ml.
Each investigator should determine their own optimal working dilution for specific applications.
Amino Acid Sequence
rg qrgknrgcvl taihlnvtdl glgyetkeel ifrycsgscd aaettydkil knlsrnrrlv sdkvgqaccr piafdddlsf lddnlvyhil rkhsakrcgc i
References
1. Collins, F. et al. (1993) Science 260:1130
2. Ron, D. et al. (2008) Proc. Natl. Acad. Sci. (USA) 105:8114
3. Wang, C. Y. et al. (1998) Neuroscience 83:7
4. Kirik, D. et al. (2004) Nature Neuro. 7:105
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