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RFRP-1(human) 是一种有效的内源性 NPFF 受体激动剂(NPFF2 和 NPFF1 的 EC50 值分别为 0.0011 和 29 nM)。减弱离体大鼠和兔心肌细胞的收缩功能。在大鼠中降低心率、每搏输出量、射血分数和心输出量,并增加血浆催乳素水平。<br>RFRP-1(human) 是一种有效的内源性 NPFF 受体激动剂(对于 NPFF2 和 NPFF1,EC50 值为 0.0011 和 29 nM,,分别)。减弱离体大鼠和兔心肌细胞的收缩功能。降低心率、每搏输出量、射血分数和心输出量,并
编号:195571
CAS号:311309-25-8
单字母:H2N-MPHSFANLPLRF-CONH2
RFRP-1(human) is a potent endogenous NPFF receptor agonist (EC50 values are 0.0011 and 29 nM for NPFF2 and NPFF1, respectively). Attenuates contractile function of isolated rat and rabbit cardiac myocytes. Reduces heart rate, stroke volume, ejection fraction and cardiac output, and increases plasma prolactin levels in rats.
RFRP-1(human) is a potent endogenous NPFF receptor agonist (EC50 values are 0.0011 and 29 nM for NPFF2 and NPFF1, respectively). Attenuates contractile function of isolated rat and rabbit cardiac myocytes. Reduces heart rate, stroke volume, ejection fraction and cardiac output, and increases plasma prolactin levels in rats.
Neuropeptide:\nNeuropeptides are small signaling molecules produced and released by neurons engaged in many physiological functions. Indeed, neuropeptides act on neural substrates such as G protein-coupled receptors (GPCRs), tyrosine-kinase receptor, insuline-like peptides and also ion channels. Actions of neuropeptides result in slow-onset, long-lasting modulation of synaptic transmission.\nPro-FMRFamide-related neuropeptide VF:\nPro-FMRFamide-related neuropeptide VF also called neuropeptide VF precursor are expressed in neurons in mediobasal hypothalamus. Neuropeptide VF precursor is a propeptide which is cleaved in three others peptide: Neuropeptide RFRP-1, RFRP-2 and RFRP-3.\nNeuropeptide RFRP-1 (81-92):\nNeuropeptide RFRP-1 play a role in the negative regulation of gonadotropin synthesis and secretion. Neuropeptide RFRP-1 is an agonist of the NPFF1 and NPFF2 receptors. In rats, Neuropeptide RFRP-1 increases prolactin release. Neuropeptide RFRP-1 (81-92) MPHSFANLPLRF-NH2 is a part of Neuropeptide RFRP-1 and is used to study NPFF receptors.
人 RFRP‑1 是一种 RF 酰胺神经肽,含芳香族与极性基序,影响折叠与受体结合行为。其序列支持神经内分泌信号结构研究;两亲性促进膜结合建模。用于调控多肽机制研究。
RFRP-1 (human) is an RF-amide neuropeptide containing aromatic and polar motifs that influence folding and receptor-binding behavior. Its sequence supports structural exploration of neuroendocrine signaling. Amphipathic features promote membrane-association modeling. Researchers apply it to examine regulatory peptide mechanisms.
RFRP-1(human) 是促性腺激素抑制激素 (GnIH) 的同系物。RFRP-1(human) 靶向人类促性腺激素释放激素 (GnRH) 神经元和促性腺激素,并有效抑制促性腺激素。RFRP-1(human) 是一种有效的神经肽 FF (NPFF) 受体激动剂,对 NPFF2 和 NPFF1 的 EC50 分别为 0.0011 nM 和 29 nM。 RFRP-1(human) rapidly and reversibly decreases shortening and relaxation in isolated mammalian cardiac myocytes in a dose dependent manner[2]. Intravenous injection of RFRP-1(human) in mice decreases heart rate, stroke volume, ejection fraction, and cardiac output[2].
Alessandro Pocai. Action and therapeutic potential of oxyntomodulin. Mol Metab. 2013 Dec 14;3(3):241-51. : https://pubmed.ncbi.nlm.nih.gov/24749050/
多肽H2N-Met-Pro-His-Ser-Phe-Ala-Asn-Leu-Pro-Leu-Arg-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1.3g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1.17mmol 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2.34mmol DIPEA,1.11mmol 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-Arg(Pbf)-Phe-Linker-MBHA Resin
H2N-Arg(Pbf)-Phe-Linker-MBHA Resin
Fmoc-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
H2N-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
Fmoc-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
H2N-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
Fmoc-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
H2N-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
Fmoc-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
H2N-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
Fmoc-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
H2N-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
Fmoc-Phe-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
H2N-Phe-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
Fmoc-Ser(tBu)-Phe-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
H2N-Ser(tBu)-Phe-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
Fmoc-His(Trt)-Ser(tBu)-Phe-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
H2N-His(Trt)-Ser(tBu)-Phe-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
Fmoc-Pro-His(Trt)-Ser(tBu)-Phe-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
H2N-Pro-His(Trt)-Ser(tBu)-Phe-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-Phe-Linker-MBHA Resin
Fmoc-Met-Pro-His(Trt)-Ser(tBu)-Phe-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-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-Met-Pro-His(Trt)-Ser(tBu)-Phe-Ala-Asn(Trt)-Leu-Pro-Leu-Arg(Pbf)-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-Met-Pro-His-Ser-Phe-Ala-Asn-Leu-Pro-Leu-Arg-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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