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Recombinant PNGase F
规格或纯度:
Specific Activity >25 U/mg;Activity 5 U/ml
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基本描述
| 规格或纯度 | Specific Activity >25 U/mg;Activity 5 U/ml |
|---|---|
| 英文名称 | Recombinant PNGase F |
| 英文别名 | Peptide-N4-(acetyl-?-glucosaminyl)-asparagine amidase, N-Glycosidase F |
| 来源 | recombinant gene from Elizabethkingia miricola in E. Coli |
| 储存温度 | 2-8°C储存 |
| 运输条件 | 冰袋运输 |
| 产品介绍 |
Product Description Recombinant PNGase F is isolated from a E. coli strain containing a clone of the Elizabethkingia miricola gene. There is no detectable difference in activity or specific activity of the recombinant enzyme from the native enzyme. PNGase F cleaves asparagine-linked (N-linked) oligosaccharides from glycoproteins. PNGase F deaminates asparagine to aspartic acid, leaving the oligosaccharides intact. Denaturation increases the rate of cleavage up to 100x. Most native proteins can still be completely N-deglycosylated but incubation time must be increased. PNGase F will remain active under incubation conditions for at least 72 hours. PNGase F will not remove oligosaccharides containing Alpha-(1,3)-linked core fucose commonly found on plant glycoproteins; for this purpose, use peptide N-glycosidase A. Contents 60 μl aliquot of recombinant PNGase F (0.3 U) in 20 mM Tris-HCl, pH 7.5 Formulation The enzyme is provided as a sterile-filtered solution in 20 mM Tris-HCl (pH 7.5). Molecular Weigh approximately 35 kD. pH optimum 7.5, active over the range 6-10. Specific Activity Specific Activity Defined as the amount of enzyme required to catalyze the release of N-linked oligosaccharides from 1 micromole of RNase B in 1 minute at 37?C, pH 7.5. Cleavage is monitored by SDS-PAGE (cleaved RNase B migrates faster). Specificity PNGase F cleaves asparagine-linked (N-linked) oligosaccharides from glycoproteins. PNGase F deaminates asparagine to aspartic acid, leaving the oligosaccharides intact. Denaturation increases the rate of cleavage up to 100x. Most native proteins can still be completely N-deglycosylated but incubation time must be increased. PNGase F will remain active under incubation conditions for at least 72 hours. PNGase F will not remove oligosaccharides containing Alpha-(1,3)-linked core fucose commonly found on plant glycoproteins; for this purpose, use peptide N-glycosidase A.? Stability Several days exposure to ambient temperatures will not reduce activity. Stable at least 12 months when stored properly.? Quality & Purity PNGase F is tested for contaminating protease as follows: 10 μg of denatured BSA is incubated at 37°C for 24 hours with 2 μl of enzyme. SDS-PAGE analysis of the treated BSA shows no evidence of degradation. The production host strain has been extensively tested and does not produce any detectable glycosidases. PNGase F Suggested usage 1. Add up to 200 μg of glycoprotein to an Eppendorf tube. Adjust to 35 μl final volume with de-ionized water. 2. Add 10 μl 5x PNGase F Reaction Buffer 7.5 and 2.5 μl of PNGase F Denaturation Solution. Heat at 100?C for 5 minutes. 3. Cool. Add 2.5 μl of PNGase F Triton X-100 and mix. 4. Add 2.0 μl of PNGase F to the reaction. Incubate 3 hours at 37?C. If SDS or heat denaturation is omitted, increase incubation time to at least 24 hours. Monitor cleavage by SDS-PAGE. |
名称和标识符
| 酶学委员会编号 | 3.5.1.52 |
|---|
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