400-998-5282
专注多肽 服务科研
400-998-5282
专注多肽 服务科研
PG 97-269 是一种选择性高亲和力 VPAC1 受体拮抗剂，对 PACAP I 型受体的亲和力可忽略不计。
编号：200405
CAS号：202463-00-1
单字母：Ac-HfDAVFTNSYRKVLKRLSARKLLQDIL-CONH2
PG 97-269 is a selective high affinity VPAC1 receptor antagonist with negligible affinity for the PACAP type I receptor. The Ki values were 15 +/- 5 nM for the rat and 2 +/- 1 nM for the human VPAC1 receptors. PG 97-269 may be useful for the evaluation of the physiological role of VIP in rat and human tissues.
很多蛋白在细胞中非常容易被降解，或被标记，进而被选择性地破坏。但含有部分D型氨基酸的多肽则显示了很强的抵抗蛋白酶降解能力。
| DOI | 名称 | |
|---|---|---|
| 10.1038/sj.bjp.0705918 | Inhibitory pathways in the circular muscle of rat jejunum | 下载 |
| 10.1016/j.brainres.2005.04.077 | VIP enhances synaptic transmission to hippocampal CA1 pyramidal cells through activation of both VPAC1 and VPAC2 receptors | 下载 |
| 10.1016/j.neuropharm.2006.07.017 | A systematic comparison of intracellular cyclic AMP and calcium signalling highlights complexities in human VPAC/PAC receptor pharmacology | 下载 |
| 10.1002/syn.21772 | Augmented cystine-glutamate exchange by pituitary adenylate cyclase-activating polypeptide signaling via the VPAC1 receptor | 下载 |
| 10.1111/nmo.12508 | Vasoactive intestinal peptide is a local mediator in a gut-brain neural axis activating intestinal gluconeogenesis | 下载 |
| 10.1016/s0196-9781(97)00228-3 | Development of high affinity selective VIP1 receptor agonists | 下载 |
多肽Ac-His-DPhe-Asp-Ala-Val-Phe-Thr-Asn-Ser-Tyr-Arg-Lys-Val-Leu-Lys-Arg-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Leu-NH2的合成步骤：
1、合成MBHA树脂：取若干克MBHA树脂（如初始取代度为0.5mmol/g）和1倍树脂摩尔量的Fmoc-Linker-OH加入到反应器中，加入DMF，搅拌使氨基酸完全溶解。再加入树脂2倍量的DIEPA，搅拌混合均匀。再加入树脂0.95倍量的HBTU，搅拌混合均匀。反应3-4小时后，用DMF洗涤3次。用2倍树脂体积的10%乙酸酐/DMF 进行封端30分钟。然后再用DMF洗涤3次，甲醇洗涤2次，DCM洗涤2次，再用甲醇洗涤2次。真空干燥12小时以上，得到干燥的树脂{Fmoc-Linker-MHBA Resin}，测定取代度。这里测得取代度为 0.3mmol/g。结构如下图：
2、脱Fmoc：取1.01g的上述树脂，用DCM或DMF溶胀20分钟。用DMF洗涤2遍。加3倍树脂体积的20%Pip/DMF溶液，鼓氮气30分钟，然后2倍树脂体积的DMF 洗涤5次。得到 H2N-Linker-MBHA Resin 。（此步骤脱除Fmoc基团，茚三酮检测为蓝色，Pip为哌啶）。结构图如下：
3、缩合：取0.91mmol Fmoc-Leu-OH 氨基酸，加入到上述树脂里，加适当DMF溶解氨基酸，再依次加入1.82mmol DIPEA，0.86mmol HBTU。反应30分钟后，取小样洗涤，茚三酮检测为无色。用2倍树脂体积的DMF 洗涤3次树脂。（洗涤树脂，去掉残留溶剂，为下一步反应做准备）。得到Fmoc-Leu-Linker-MBHA Resin。氨基酸：DIPEA：HBTU：树脂=3：6：2.85：1（摩尔比）。结构图如下：
4、依次循环步骤二、步骤三，依次得到
H2N-Leu-Linker-MBHA Resin
Fmoc-Ile-Leu-Linker-MBHA Resin
H2N-Ile-Leu-Linker-MBHA Resin
Fmoc-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Ala-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Ala-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-DPhe-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
H2N-DPhe-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
Fmoc-His(Trt)-DPhe-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin
以上中间结构，均可在专肽生物多肽计算器-多肽结构计算器中，一键画出。
最后再经过步骤二得到 H2N-His(Trt)-DPhe-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHA Resin，结构如下：
5、乙酸酐反应连接：在上述树脂中，加入适当DMF后，再加入0.91mmol乙酸酐到树脂中，再加入1.82mmol DIPEA，鼓氮气反应30分钟。用2倍树脂体积的DMF 洗涤3次树脂（洗涤树脂，去掉残留溶剂，为下一步反应做准备）。 得到Ac-His(Trt)-DPhe-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asn(Trt)-Ser(tBu)-Tyr(tBu)-Arg(Pbf)-Lys(Boc)-Val-Leu-Lys(Boc)-Arg(Pbf)-Leu-Ser(tBu)-Ala-Arg(Pbf)-Lys(Boc)-Leu-Leu-Gln(Trt)-Asp(OtBu)-Ile-Leu-Linker-MBHAResin。 结构如下：
6、切割：6倍树脂体积的切割液（或每1g树脂加8ml左右的切割液），摇床摇晃 2小时，过滤掉树脂，用冰无水乙醚沉淀滤液，并用冰无水乙醚洗涤沉淀物3次，最后将沉淀物放真空干燥釜中，常温干燥24小试，得到粗品Ac-His-DPhe-Asp-Ala-Val-Phe-Thr-Asn-Ser-Tyr-Arg-Lys-Val-Leu-Lys-Arg-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Leu-NH2。结构图见产品结构图。
切割液选择：1）TFA：H2O=95%：5%
2）TFA：H2O：TIS=95%：2.5%：2.5%
3）三氟乙酸：茴香硫醚：1，2-乙二硫醇：苯酚：水=87.5%：5%：2.5%：2.5%：2.5%
（前两种适合没有容易氧化的氨基酸，例如Trp、Cys、Met。第三种适合几乎所有的序列。）
7、纯化冻干：使用液相色谱纯化，收集目标峰液体，进行冻干，获得蓬松的粉末状固体多肽。不过这时要取小样复测下纯度 是否目标纯度。
8、最后总结：
杭州专肽生物技术有限公司（ALLPEPTIDE https://www.allpeptide.com）主营定制多肽合成业务，提供各类长肽，短肽，环肽，提供各类修饰肽，如：荧光标记修饰（CY3、CY5、CY5.5、CY7、FAM、FITC、Rhodamine B、TAMRA等），功能基团修饰肽（叠氮、炔基、DBCO、DOTA、NOTA等），同位素标记肽（N15、C13），订书肽（Stapled Peptide）,脂肪酸修饰肽（Pal、Myr、Ste），磷酸化修饰肽（P-Ser、P-Thr、P-Tyr），环肽（酰胺键环肽、一对或者多对二硫键环），生物素标记肽，PEG修饰肽，甲基化修饰肽等。
以上所有内容，为专肽生物原创内容，请勿发布到其他网站上。
