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專注多肽 服務科研
一種生長素釋放肽受體拮抗劑。淺川等人。發(fā)現(xiàn)外周給藥 (D-Lys³)-GHRP-6 (HwkWfK-酰胺) 減少了瘦小鼠、飲食誘導肥胖的小鼠和 ob/ob 肥胖小鼠的食物攝入量,并且重復施用這種 GHS-R 拮抗劑,減少體重增加并改善 ob/ob 肥胖小鼠的血糖控制。
編號:169760
CAS號:136054-22-3
單字母:H2N-HwkWfK-CONH2
編號: | 169760 |
中文名稱: | 六肽[DLys3]-Growth HormoneReleasing Peptide -6 |
英文名: | [DLys3]-Growth HormoneReleasing Peptide -6 |
CAS號: | 136054-22-3 |
單字母: | H2N-HwkWfK-CONH2 |
三字母: | H2N N端氨基 -His組氨酸 -DTrpD型色氨酸 -DLysD型賴氨酸 -Trp色氨酸 -DPheD型笨丙氨酸 -Lys賴氨酸 -CONH2C端酰胺化 |
氨基酸個數(shù): | 6 |
分子式: | C49H63N13O6 |
平均分子量: | 930.11 |
精確分子量: | 929.5 |
等電點(PI): | - |
pH=7.0時的凈電荷數(shù): | 3.21 |
平均親水性: | -0.63333333333333 |
疏水性值: | -1.67 |
外觀與性狀: | 白色粉末狀固體 |
消光系數(shù): | 11000 |
來源: | 人工化學合成,僅限科學研究使用,不得用于人體。 |
純度: | 95%、98% |
鹽體系: | 可選TFA、HAc、HCl或其它 |
生成周期: | 2-3周 |
儲存條件: | 負80℃至負20℃ |
標簽: | D型氨基酸肽 |
A ghrelin receptor antagonist. Asakawa et al. found that peripherally administered (D-Lys³)-GHRP-6 (HwkWfK-amide) decreased food intake in lean mice, in mice with diet induced obesity, and in ob/ob obese mice, and that repeated administration of this GHS-R antagonist decreased body weight gain and improved glycaemic control in ob/ob obese mice.
很多蛋白在細胞中非常容易被降解,或被標記,進而被選擇性地破壞。但含有部分D型氨基酸的多肽則顯示了很強的抵抗蛋白酶降解能力。
DOI | 名稱 | |
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10.1124/jpet.102.047563 | Interaction of the growth hormone-releasing peptides ghrelin and growth hormone-releasing peptide-6 with the motilin receptor in the rabbit gastric antrum | 下載 |
10.1038/sj.bjp.0705284 | Growth hormone secretagogues modulate the electrical and contractile properties of rat skeletal muscle through a ghrelin-specific receptor | 下載 |
10.1136/gut.52.7.947 | Antagonism of ghrelin receptor reduces food intake and body weight gain in mice | 下載 |
10.1113/jphysiol.2003.040600 | Ghrelin induces fasted motor activity of the gastrointestinal tract in conscious fed rats | 下載 |
10.1042/BJ20040036 | Identification of the growth hormone-releasing peptide binding site in CD36: a photoaffinity cross-linking study | 下載 |
10.1016/j.febslet.2004.08.088 | Signal transduction mechanism of the seabream growth hormone secretagogue receptor | 下載 |
10.1136/gut.2005.065896 | Gastric motor effects of peptide and non-peptide ghrelin agonists in mice in vivo and in vitro | 下載 |
10.1210/en.2005-1335 | Role of endogenous ghrelin in the hyperphagia of mice with streptozotocin-induced diabetes | 下載 |
10.1016/j.ejphar.2006.03.043 | The contractile effect of the ghrelin receptor antagonist, D-Lys3-GHRP-6, in rat fundic strips is mediated through 5-HT receptors | 下載 |
10.1111/j.1365-2982.2007.00945.x | Endogenous acyl ghrelin is involved in mediating spontaneous phase III-like contractions of the rat stomach | 下載 |
10.1111/j.1365-2982.2008.01179.x | Ghrelin regulates gastric phase III-like contractions in freely moving conscious mice | 下載 |
10.1152/ajpregu.90555.2008 | Ghrelin modulates electrical activity of area postrema neurons | 下載 |
10.1037/a0016808 | Assessing the role of the growth hormone secretagogue receptor in motivational learning and food intake | 下載 |
10.1111/j.1530-0277.2010.01237.x | Ghrelin receptor antagonism decreases alcohol consumption and activation of perioculomotor urocortin-containing neurons | 下載 |
10.1016/j.expneurol.2011.04.003 | Ghrelin protects spinal cord motoneurons against chronic glutamate-induced excitotoxicity via ERK1/2 and phosphatidylinositol-3-kinase/Akt/glycogen synthase kinase-3β pathways | 下載 |
10.1152/ajpendo.00695.2010 | Urocortin 1 reduces food intake and ghrelin secretion via CRF(2) receptors | 下載 |
10.1007/s00726-012-1260-8 | Pharmacological characterization of the ghrelin receptor mediating its inhibitory action on inflammatory pain in rats | 下載 |
10.1016/j.peptides.2013.10.028 | Stimulatory effect of ghrelin on food intake in bullfrog larvae | 下載 |
10.1016/j.bbadis.2014.09.006 | Ghrelin inhibits BSCB disruption/hemorrhage by attenuating MMP-9 and SUR1/TrpM4 expression and activation after spinal cord injury | 下載 |
10.1016/j.psyneuen.2014.09.003 | Peripheral α2-β1 adrenergic interactions mediate the ghrelin response to brain urocortin 1 in rats | 下載 |
10.1155/2015/547473 | Ghrelin Increases Beta-Catenin Level through Protein Kinase A Activation and Regulates OPG Expression in Rat Primary Osteoblasts | 下載 |
10.1126/science.8503009 | A nonpeptidyl growth hormone secretagogue | 下載 |
10.1111/j.1365-2982.2011.01721.x | Central administration of pan-somatostatin agonist ODT8-SST prevents abdominal surgery-induced inhibition of circulating ghrelin, food intake and gastric emptying in rats | 下載 |
10.1016/j.ygcen.2014.03.016 | Crosstalking between the "gut-brain" hormone ghrelin and the circadian system in the goldfish. Effects on clock gene expression and food anticipatory activity | 下載 |
10.1111/nmo.12588 | Ghrelin enhancer, rikkunshito, improves postprandial gastric motor dysfunction in an experimental stress model | 下載 |
多肽H2N-His-DTrp-DLys-Trp-DPhe-Lys-NH2的合成步驟:
1、合成MBHA樹脂:取若干克的MBHA樹脂(如初始取代度為0.5mmol/g)和1倍樹脂摩爾量的Fmoc-Linker-OH加入到反應器中,加入DMF,攪拌使氨基酸完全溶解。再加入樹脂2倍量的DIEPA,攪拌混合均勻。再加入樹脂0.95倍量的HBTU,攪拌混合均勻。反應3-4小時后,用DMF洗滌3次。用2倍樹脂體積的10%乙酸酐/DMF 進行封端30分鐘。然后再用DMF洗滌3次,甲醇洗滌2次,DCM洗滌2次,再用甲醇洗滌2次。真空干燥12小時以上,得到干燥的樹脂{Fmoc-Linker-MHBA Resin},測定取代度。這里測得取代度為 0.3mmol/g。結構如下圖:
2、脫Fmoc:取2.23g的上述樹脂,用DCM或DMF溶脹20分鐘。用DMF洗滌2遍。加3倍樹脂體積的20%Pip/DMF溶液,鼓氮氣30分鐘,然后2倍樹脂體積的DMF 洗滌5次。得到 H2N-Linker-MBHA Resin 。(此步驟脫除Fmoc基團,茚三酮檢測為藍色,Pip為哌啶)。結構圖如下:
3、縮合:取2.01mmol Fmoc-Lys(Boc)-OH 氨基酸,加入到上述樹脂里,加適當DMF溶解氨基酸,再依次加入4.01mmol DIPEA,1.91mmol HBTU。反應30分鐘后,取小樣洗滌,茚三酮檢測為無色。用2倍樹脂體積的DMF 洗滌3次樹脂。(洗滌樹脂,去掉殘留溶劑,為下一步反應做準備)。得到Fmoc-Lys(Boc)-Linker-MBHA Resin。氨基酸:DIPEA:HBTU:樹脂=3:6:2.85:1(摩爾比)。結構圖如下:
4、依次循環(huán)步驟二、步驟三,依次得到
H2N-Lys(Boc)-Linker-MBHA Resin
Fmoc-DPhe-Lys(Boc)-Linker-MBHA Resin
H2N-DPhe-Lys(Boc)-Linker-MBHA Resin
Fmoc-Trp(Boc)-DPhe-Lys(Boc)-Linker-MBHA Resin
H2N-Trp(Boc)-DPhe-Lys(Boc)-Linker-MBHA Resin
Fmoc-DLys(Boc)-Trp(Boc)-DPhe-Lys(Boc)-Linker-MBHA Resin
H2N-DLys(Boc)-Trp(Boc)-DPhe-Lys(Boc)-Linker-MBHA Resin
Fmoc-DTrp(Boc)-DLys(Boc)-Trp(Boc)-DPhe-Lys(Boc)-Linker-MBHA Resin
H2N-DTrp(Boc)-DLys(Boc)-Trp(Boc)-DPhe-Lys(Boc)-Linker-MBHA Resin
Fmoc-His(Trt)-DTrp(Boc)-DLys(Boc)-Trp(Boc)-DPhe-Lys(Boc)-Linker-MBHA Resin
以上中間結構,均可在專肽生物多肽計算器-多肽結構計算器中,一鍵畫出。
最后再經(jīng)過步驟二得到 H2N-His(Trt)-DTrp(Boc)-DLys(Boc)-Trp(Boc)-DPhe-Lys(Boc)-Linker-MBHA Resin,結構如下:
5、切割:6倍樹脂體積的切割液(或每1g樹脂加8ml左右的切割液),搖床搖晃 2小時,過濾掉樹脂,用冰無水乙醚沉淀濾液,并用冰無水乙醚洗滌沉淀物3次,最后將沉淀物放真空干燥釜中,常溫干燥24小試,得到粗品H2N-His-DTrp-DLys-Trp-DPhe-Lys-NH2。結構圖見產品結構圖。
切割液選擇: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%
(前兩種適合沒有容易氧化的氨基酸,例如Trp、Cys、Met。第三種適合幾乎所有的序列。)
6、純化凍干:使用液相色譜純化,收集目標峰液體,進行凍干,獲得蓬松的粉末狀固體多肽。不過這時要取小樣復測下純度 是否目標純度。
7、最后總結:
杭州專肽生物技術有限公司(ALLPEPTIDE http://amynixphotography.com)主營定制多肽合成業(yè)務,提供各類長肽,短肽,環(huán)肽,提供各類修飾肽,如:熒光標記修飾(CY3、CY5、CY5.5、CY7、FAM、FITC、Rhodamine B、TAMRA等),功能基團修飾肽(疊氮、炔基、DBCO、DOTA、NOTA等),同位素標記肽(N15、C13),訂書肽(Stapled Peptide),脂肪酸修飾肽(Pal、Myr、Ste),磷酸化修飾肽(P-Ser、P-Thr、P-Tyr),環(huán)肽(酰胺鍵環(huán)肽、一對或者多對二硫鍵環(huán)),生物素標記肽,PEG修飾肽,甲基化修飾肽等。
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