专肽生物_定制多肽合成服务_多肽合成定制服务_多肽合成厂家_多肽合成公司

（Ala11.22.28）-VIP（人、小鼠、大鼠）是一种高选择性的人VPAC1受体激动剂，在刺激VPAC1腺苷酸环化酶活性方面显示出比VPAC2受体高1000倍的效率。它是表征VPAC1受体介导事件的有效药理学工具。

(Ala11.22.28)-VIP (human, mouse, rat), a highly selective human VPAC1 receptor agonist, shows a 1000-fold higher efficiency in stimulating adenylate cyclase activity from VPAC1 than VPAC2 receptors. It is a valid pharmacological tool for characterizing VPAC1 receptor-mediated events.

丙氨酸 ¹¹,²²,²⁸-VIP（人、牛、猪、大鼠）整合多个丙氨酸取代，改善主链流动性并修饰侧链相互作用。这些变化有助于剖析受体结合决定簇和结构动力学。研究人员将该类似物用于 VIP 家族肽的比较分析。其受控变异支持肽工程研究。

Ala11,22,28-VIP (human, bovine, porcine, rat) incorporates multiple alanine substitutions that refine backbone mobility and modify side-chain interactions. These changes assist in dissecting receptor-binding determinants and structural dynamics. Researchers use the analog for comparative analysis of VIP family peptides. Its controlled variations support studies in peptide engineering.

（丙氨酸 ¹¹、²²、²⁸）‑血管活性肠肽（人、小鼠、大鼠）是在三个关键位点进行丙氨酸取代的血管活性肠肽类似物，可降低侧链复杂度。该修饰可用于考察血管活性肠肽螺旋内的结构耐受性，其行为可揭示哪些残基对受体激活至关重要、哪些仅起结构支撑作用。研究人员用其定位血管活性肠肽信号中的功能关键位点。

(Ala11.22.28)-VIP (human, mouse, rat) is a vasoactive intestinal peptide analog with alanine substitutions at three key positions, reducing side-chain complexity. The modifications allow examination of structural tolerance within the VIP helix. Its behavior reveals which residues are essential for receptor activation versus structural support. Researchers employ it to map functionally critical sites in VIP signaling.

多肽H2N-His-Ser-Asp-Ala-Val-Phe-Thr-Asp-Asn-Tyr-Ala-Arg-Leu-Arg-Lys-Gln-Met-Ala-Val-Lys-Lys-Ala-Leu-Asn-Ser-Ile-Leu-Ala-NH2的合成步骤：

1、合成MBHA树脂：取若干克的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2.61g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2.35mmol Fmoc-Ala-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4.7mmol DIPEA，2.23mmol 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-Ala-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-Ala-Linker-MBHA Resin

Fmoc-Leu-Ala-Linker-MBHA Resin

H2N-Leu-Ala-Linker-MBHA Resin

Fmoc-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Val-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Val-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Ala-Val-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Ala-Val-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-Ser(tBu)-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

H2N-Ser(tBu)-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin

Fmoc-His(Trt)-Ser(tBu)-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-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)-Ser(tBu)-Asp(OtBu)-Ala-Val-Phe-Thr(tBu)-Asp(OtBu)-Asn(Trt)-Tyr(tBu)-Ala-Arg(Pbf)-Leu-Arg(Pbf)-Lys(Boc)-Gln(Trt)-Met-Ala-Val-Lys(Boc)-Lys(Boc)-Ala-Leu-Asn(Trt)-Ser(tBu)-Ile-Leu-Ala-Linker-MBHA Resin，结构如下：

5、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H2N-His-Ser-Asp-Ala-Val-Phe-Thr-Asp-Asn-Tyr-Ala-Arg-Leu-Arg-Lys-Gln-Met-Ala-Val-Lys-Lys-Ala-Leu-Asn-Ser-Ile-Leu-Ala-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。）

6、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。

7、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。

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