神经激素异源催产素 GFKNVEMMTARGF-酰胺已从成年烟草角虫 Manduca sexta 的头部提取物中分离出来。它在体外强烈刺激保幼激素从语料库中释放。
编号:186128
CAS号:120928-88-3
单字母:H2N-GFKNVEMMTARGF-CONH2
The neurohormone allatotropin, GFKNVEMMTARGF-amide, has been isolated from head extracts of the adult tobacco hornworm, Manduca sexta. It strongly stimulates the release of juvenile hormone from the corpora allata in vitro.
DOI | 名称 | |
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10.1016/s0196-9781(01)00660-x | Effects of allatotropin and allatostatin on in vitro production of juvenile hormones by the corpora allata of virgin females of the moths of Heliothis virescens and Manduca sexta | 下载 |
10.1016/s0965-1748(03)00005-5 | Molecular characterisation of cDNAs from the fall armyworm Spodoptera frugiperda encoding Manduca sexta allatotropin and allatostatin preprohormone peptides | 下载 |
10.1016/s0022-1910(03)00017-9 | Myotropic effect of helicokinins, tachykinin-related peptides and Manduca sexta allatotropin on the gut of Heliothis virescens (Lepidoptera: Noctuidae) | 下载 |
10.1016/j.regpep.2004.05.015 | Characterization of a novel peptide with allatotropic activity in the fall armyworm Spodoptera frugiperda | 下载 |
10.1002/dneu.20381 | Direct peptide profiling of lateral cell groups of the antennal lobes of Manduca sexta reveals specific composition and changes in neuropeptide expression during development | 下载 |
10.1126/science.243.4897.1481 | Identification of an allatotropin from adult manduca sexta | 下载 |
10.1002/arch.20332 | Control of the release of digestive enzymes in the larvae of the fall armyworm, Spodoptera frugiperda | 下载 |
10.1016/j.ibmb.2011.06.002 | Isolation and functional characterization of an allatotropin receptor from Manduca sexta | 下载 |
多肽H2N-Gly-Phe-Lys-Asn-Val-Glu-Met-Met-Thr-Ala-Arg-Gly-Phe-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2.23g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2.01mmol Fmoc-Phe-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4.01mmol DIPEA,1.91mmol 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-Phe-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-Phe-Linker-MBHA Resin
Fmoc-Gly-Phe-Linker-MBHA Resin
H2N-Gly-Phe-Linker-MBHA Resin
Fmoc-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
H2N-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
Fmoc-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
H2N-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
Fmoc-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
H2N-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
Fmoc-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
H2N-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
Fmoc-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
H2N-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
Fmoc-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
H2N-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
Fmoc-Val-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
H2N-Val-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
Fmoc-Asn(Trt)-Val-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
H2N-Asn(Trt)-Val-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
Fmoc-Lys(Boc)-Asn(Trt)-Val-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
H2N-Lys(Boc)-Asn(Trt)-Val-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
Fmoc-Phe-Lys(Boc)-Asn(Trt)-Val-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
H2N-Phe-Lys(Boc)-Asn(Trt)-Val-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-Linker-MBHA Resin
Fmoc-Gly-Phe-Lys(Boc)-Asn(Trt)-Val-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-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-Gly-Phe-Lys(Boc)-Asn(Trt)-Val-Glu(OtBu)-Met-Met-Thr(tBu)-Ala-Arg(Pbf)-Gly-Phe-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-Gly-Phe-Lys-Asn-Val-Glu-Met-Met-Thr-Ala-Arg-Gly-Phe-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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