Sortase A 重组蛋白, S. aureus (His)

Sortase A Protein, S. aureus, Recombinant (His)

产品编号 TMPH-03575

Sortase A Protein, S. aureus, Recombinant (His) is expressed in E. coli expression system with N-6xHis tag. The predicted molecular weight is 24.9 kDa and the accession number is Q2FV99.

规格	价格	库存
20 μg	¥ 2,290	现货
100 μg	¥ 4,750	现货
1 mg	¥ 16,000	20日内发货

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常见问题解答

问超声应使用什么样的频率？

答频率建议使用常规的超声清洗频率即可，一般在20 kHz - 100 kHz。

问是否能直接用缓冲液对抑制剂 DMSO 母液做梯度稀释？

答大部分情况下，都是可以溶解的。但有时，有机试剂直接加入水相介质时会析出。建议将抑制剂先以DMSO做梯度稀释，再将经过稀释的抑制剂加入缓冲液或细胞培养基。有些抑制剂甚至只有在其工作浓度下才能溶于水相。比如细胞实验中希望终浓度为 1 μM 的话，可以把 10 mM 的 DMSO 母液用 DMSO 稀释到 1 mM，再吸 2 μL 加入到 2 mL 的生理盐水/PBS/细胞培液，终浓度即为 1 μM。为避免药物析出，稀释前，可将母液和培养基 37℃ 预热，避免温度低造成严重析出。若稀释过程中出现化合物析出的情况，建议您采用超声加热的方法使其复溶。

问动物不能耐受 DMSO，给药时 DMSO量应该如何控制？

答对于普通的老鼠，DMSO 的浓度应控制在 10% 以下，对于裸鼠、转基因小鼠、耐受性弱的老鼠等，DMSO 浓度需控制在2%以下。对于首次操作的抑制剂，建议先做溶剂阴性对照，确认溶解对动物无非特异性影响。

问Tween-20 可以用 Tween-80 替代吗？

答不建议使用 Tween-20。相较于 Tween-20，Tween-80 的耐受性更好，Tween-80已被用作评估实验药物和毒物的行为影响的工具，且没有明显的副作用。参考文献：Castro CA， Hogan JB， Benson KA， Shehata CW， Landauer MR. Behavioral effects of vehicles: DMSO， ethanol， Tween-20， Tween-80， and emulphor-620. Pharmacol Biochem Behav. 1995 Apr;50(4):521-6.

问小规格产品，收到瓶子后看不到任何东西？

答由于产品规格小，粉末在运输过程中产生的静电导致过于分散，管壁和盖子上皆会粘着，您可以放心，离心后加入适量溶剂直接配制母液、充分溶解即可。

产品信息

生物活性	Activity has not been tested. It is theoretically active, but we cannot guarantee it. If you require protein activity, we recommend choosing the eukaryotic expression version first.
产品描述	Sortase A Protein, S. aureus, Recombinant (His) is expressed in E. coli expression system with N-6xHis tag. The predicted molecular weight is 24.9 kDa and the accession number is Q2FV99.
种属	Staphylococcus aureus
表达系统	E. coli
标签	N-6xHis
蛋白编号	Q2FV99
别名	Surface protein sorting A,srtA,Sortase A
氨基酸序列	AKPHIDNYLHDKDKDEKIEQYDKNVKEQASKDKKQQAKPQIPKDKSKVAGYIEIPDADIKEPVYPGPATPEQLNRGVSFAEENESLDDQNISIAGHTFIDRPNYQFTNLKAAKKGSMVYFKVGNETRKYKMTSIRDVKPTDVGVLDEQKGKDKQLTLITCDDYNEKTGVWEKRKIFVATEVK
蛋白构建	25-206 aa
蛋白纯度	> 85% as determined by SDS-PAGE.
分子量	24.9 kDa (predicted)
内毒素	< 1.0 EU/μg of the protein as determined by the LAL method.
缓冲液	If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
复溶方法	Reconstitute the lyophilized protein in sterile deionized water. The product concentration should not be less than 100 μg/mL. Before opening, centrifuge the tube to collect powder at the bottom. After adding the reconstitution buffer, avoid vortexing or pipetting for mixing.
存储	Lyophilized powders can be stably stored for over 12 months, while liquid products can be stored for 6-12 months at -80°C. For reconstituted protein solutions, the solution can be stored at -20°C to -80°C for at least 3 months. Please avoid multiple freeze-thaw cycles and store products in aliquots.
运输方式	In general, Lyophilized powders are shipping with blue ice. Solutions are shipping with dry ice.
研究背景	Transpeptidase that anchors surface proteins to the cell wall. Recognizes and modifies its substrate by proteolytic cleavage of a C-terminal sorting signal. Following cleavage, a covalent intermediate is formed via a thioester bond between the sortase and its substrate, which is then transferred and covalently attached to the cell wall. This sortase recognizes a Leu-Pro-x-Thr-Gly (LPXTG) motif, which is cleaved by the sortase between the threonine and glycine residues. Utilizes lipid II as the peptidoglycan substrate for the sorting reaction. Responsible for the display of important virulence factors. Important for interactions with the host and host colonization during infection.

Sortase A Protein, S. aureus, Recombinant (His)

Sortase A Protein, S. aureus, Recombinant (His)

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