| Kemptidesubstrate for cAMP-dependent protein kinase (PKA) |
Sample solution is provided at 25 µL, 10mM.
Nature.2017 Jan 19;541(7637):417-420.
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| Cas No. | 65189-71-1 | SDF | Download SDF |
| Synonyms | NSC 332190 | ||
| Chemical Name | (5S,8S,11S,14S,17S,20S)-20-amino-14,17-bis(3-guanidinopropyl)-8-(hydroxymethyl)-5-isobutyl-11,22-dimethyl-4,7,10,13,16,19-hexaoxo-3,6,9,12,15,18-hexaazatricosan-1-oic acid | ||
| Canonical SMILES | OC(CNC([C@H](CC(C)C)NC([C@H](CO)NC([C@H](C)NC([C@@H](NC([C@@H](NC([C@@H](N)CC(C)C)=O)CCCNC(N)=N)=O)CCCNC(N)=N)=O)=O)=O)=O)=O | ||
| Formula | C32H61N13O9 | M.Wt | 771.9 |
| Solubility | Soluble in DMSO | Storage | Store at -20°C |
| Physical Appearance | A crystalline solid | Shipping Condition | Evaluation sample solution : ship with blue ice.All other available size:ship with RT , or blue ice upon request |
| General tips | For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months. | ||
Kemptide is a synthetic heptapeptide that acts as a substrate for cAMP-dependent protein kinase (PK) [1].
Cyclic AMP-dependent protein kinase is the sole intracellular acceptor for cyclic AMP in all cell types. Protein phosphorylation by different types of protein kinase (PK) activities comprises a form of protein modification that plays an important role in the regulation of numerous biological processes [1][2].
Kemptide is a novel synthetic heptapeptide phosphate acceptor that acts as a substrate for cAMP-dependent protein kinase. Kemptide had all the properties of a cytophilic substrate and could preserving cell membrane intactness when added to cultured cells. In the presence of extracellular ATP and cAMP, different types of intact cells catalyzed the phosphorylation of Kemptide with Km values of 3-4 μM. Kemptide phosphorylation was influenced by PKI, the inhibitory protein specific for cAMP-PK [1]. Kemptide was usually used as a substrate for detection of activities of soluble A-kinase isolated from guinea-pig lung parenchyma and from bovine tracheal smooth muscle [2][3].
References:[1]. Kübler D, Pyerin W, Bill O, et al. Evidence for ecto-protein kinase activity that phosphorylates Kemptide in a cyclic AMP-dependent mode. J Biol Chem. 1989 Aug 25;264(24):14549-55.[2]. Giembycz MA, Diamond J. Evaluation of kemptide, a synthetic serine-containing heptapeptide, as a phosphate acceptor for the estimation of cyclic AMP-dependent protein kinase activity in respiratory tissues. Biochem Pharmacol. 1990 Jan 15;39(2):271-83.[3]. Langlands JM, Rodger IW. Determination of soluble cAMP-dependent protein kinase activity in guinea-pig tracheal smooth muscle. Preferential use of kemptide as a phosphorylating substrate. Biochem Pharmacol. 1990 Apr 15;39(8):1365-74.
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最近遇到了实验上的大问题，就是用一步法做RNA的荧光定量PCR时，发现低浓度的做不出来，而DNA是可以的，想请问各位在一步法PCR中有没有什么高见，就是逆转录的Buffer有没有什么需要注意的地方！就是在逆转录酶的最适Buffer和Taq酶的最适Buffer中寻找一个最适的Buffer！
DNA拓扑异构酶Ⅱ与抗肿瘤药物靶点的研究进展.doc(59.5k)
B、酶细胞产能细胞内（外）起作用消化酶细胞外起作用B错误；
C、酶同需要适条件同胃蛋白酶与胰蛋白酶所需PH同C错误；
D、葡萄糖细胞质基质解丙酮酸需要酶催化D确．
故选：D．
我是新手。我要开始做实验了，但一开始就碰到了个很大的问题。
我想买个能利用哺乳动物细胞RNA聚合酶将DNA转录成RNA的的质粒，向好几家公司打了电话，但都没有我想要的东西。
没有这个东西，我的实验就只能是蓝图了。哪位战友有办法的，能不能帮帮我？
不胜感激。
请规范发贴，求助贴请在标题前加【求助】，谢谢您的合作。——by草根
