| 24(R)-hydroxy CholesterolLXRα and LXRβ nuclear receptors activator |
Sample solution is provided at 25 µL, 10mM.
Nature.2017 Jan 19;541(7637):417-420.
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- Purity = 98.00%
- COA (Certificate Of Analysis)
- MSDS (Material Safety Data Sheet)
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Chemical structure
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| Cas No. | 27460-26-0 | SDF | Download SDF |
| Synonyms | 24-Epicerebrosterol | ||
| Chemical Name | cholest-5-ene-3β,24R-diol | ||
| Canonical SMILES | O[C@H](C1)CC[C@@]2(C)C1=CC[C@]3([H])[C@]2([H])CC[C@@]4(C)[C@@]3([H])CC[C@]4([H])[C@H](C)CC[C@@H](O)C(C)C | ||
| Formula | C27H46O2 | M.Wt | 402.7 |
| Solubility | ≤20mg/ml in ethanol;0.1mg/ml in DMSO;2mg/ml in dimethyl formamide | 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. | ||
EC50: 7 and 4 μM for LXRα and LXRβ, respectively
24(R)-hydroxy Cholesterol is a LXRα and LXRβ nuclear receptors activator.
The liver X receptors (LXRs) are identified as orphan members of the nuclear receptor superfamily. Like other receptors in the family, LXRs heterodimerize with RXR and bind to specific response elements. LXRα and β are nuclear receptors regulating the metabolism of several important lipids, such as cholesterol and bile acids.
In vitro: In previous study, the authors proposed that LXRs could regulate the lipid metabolism via their interaction with specific oxysterols, such as 24(R)-hydroxycholesterol, 22(R)-hydroxycholesterol, 24(S)-hydroxycholesterol, and 24(S),25-epoxycholesterol. Results showed that by using a ligand binding assay, it was demonstrated that these oxysterols could directly bind to LXRs. In addition, this study further revealed that the position-specific monooxidation of the sterol side chain was required for LXR binding and activation. Enhanced binding and activation could be achieved via the use of 24-oxo ligands. Moreover, the introduction of an oxygen on the sterol B-ring led to a LXRa-subtype selectivity [1].
In vivo: Up to now, there is no animal in vivo data reported.
Clinical trial: So far, no clinical study has been conducted.
Reference:[1] Janowski, B.A.,Grogan, M.J.,Jones, S.A., et al. Structural requirements of ligands for the oxysterol liver X receptors LXRα and LXRβ. Proceedings of the National Academy of Sciences of the United States of America 96(1), 266-271 (1999).
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利用NheI和HindIII双酶切插入目的片段，为什么双酶切有目的片段和切开的质粒，测序却没有？
并且测序后在NheI位点后的序列变成了-GGCTAGGTAC-Kpn位点（CGTTTAAACTTAAGCTTG消失。之前和之后的序列都相符），之间的怎么都没了？
请教高人，这样的问题怎么解决？
多谢
你所说的“测序酶”在一般情况下就是“聚合酶”。
因为目前的的测序方法主要就是借助聚合反应。
当然，有些测序方法（比如曾经的SOLiD系统）是利用连接反应，那么它用的“测序酶”肯定是连接酶。
估计，也就是这个原因有人把它。
两个基因大小分别230kb和450kb，酶切后，450kb的有目的条带，但很弱，230kb的质粒条带亮，其下方有一很微弱条带，用的酶分别是：Ncol和Spel体系是（Takara，两个酶切体系不同，用的官网推荐体系）：
NcoI1μl
Spel1μl
10×KBuffer2μl
0.1%BSA2μl
DNA3ul
灭菌水upto20μl37℃4h电泳1h
期待着高手们的指点，谢谢。
【之前构建的4个重组质粒里也有两个出现这样的问题（aagtcc变成agtcc），但是酶切能切出插入的片段】
目前问测序公司得到的答复是样品可能不是单克隆，测序结果是不准确的，建议重新挑取单克隆测序。
不知道还有没有别的方法？
●应用酶水解多肽不会破坏氨基酸，也不会发生消旋化。水解的产物为较小的肽段。向左转|向右转
