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GRGDS-amide can be coupled to carrriers by its free N-terminus.
编号:164489
CAS号:143648-02-6
单字母:H2N-GRGDS-CONH2
| 编号: | 164489 |
| 中文名称: | 五肽GRGDS-NH2 |
| 英文名: | GRGDS-NH2 |
| CAS号: | 143648-02-6 |
| 单字母: | H2N-GRGDS-CONH2 |
| 三字母: | H2N N端氨基:N-terminal amino group。在肽或多肽链中含有游离a-氨基的氨基酸一端。在表示氨基酸序列时,通常将N端放在肽链的左边。 -Gly甘氨酸:glycine。系统命名为 2-氨基乙酸。是编码氨基酸中没有旋光性的最简单的氨基酸,因具有甜味而得名。符号:G,Gly。 -ArgL-精氨酸:arginine。系统命名为(2S)-氨基-5-胍基戊酸。在生理条件下带正电荷,为编码氨基酸。是幼小哺乳动物的必需氨基酸。符号:R,Arg。 -Gly甘氨酸:glycine。系统命名为 2-氨基乙酸。是编码氨基酸中没有旋光性的最简单的氨基酸,因具有甜味而得名。符号:G,Gly。 -AspL-天冬氨酸:aspartic acid。系统命名为(2S)-氨基-丁二酸。是编码氨基酸,又是神经递质。符号:D,Asp。D-天冬氨酸存在于多种细菌的细胞壁和短杆菌肽A中。 -SerL-丝氨酸:serine。系统命名为(2S)-氨基-3-羟基丙酸。是编码氨基酸。因可从蚕丝中获得而得名。符号:S,Ser。在丝原蛋白及某些抗菌素中含有 D-丝氨酸。 -CONH2C端酰胺化 |
| 氨基酸个数: | 5 |
| 分子式: | C17H31N9O8 |
| 平均分子量: | 489.48 |
| 精确分子量: | 489.23 |
| 等电点(PI): | 10.56 |
| pH=7.0时的净电荷数: | 0.98 |
| 平均亲水性: | 2.1 |
| 疏水性值: | -1.92 |
| 外观与性状: | 白色粉末状固体 |
| 消光系数: | - |
| 来源: | 人工化学合成,仅限科学研究使用,不得用于人体。 |
| 纯度: | 95%、98% |
| 盐体系: | 可选TFA、HAc、HCl或其它 |
| 生成周期: | 2-3周 |
| 储存条件: | 负80℃至负20℃ |
| 标签: | RGD、RAD肽 |
GRGDS-amide can be coupled to carrriers by its free N-terminus.

RGD肽-说明
RGD肽是指含有由Arg-Gly-Asp三个氨基酸组成的序列多肽,有直线肽和环肽之分。它们是许多细胞外基质蛋白(如VN、FN、FGN、胶原等)等最小识别短肽序列。

研究发现,RGD序列肽具有广泛的生物活性,可用于心血管疾病、骨质疏松和炎症等疾病的治疗,还可以预防和治疗由细胞粘附异常而导致的肿瘤,尤其是发展性肿瘤的转移;另一方面,RGD 序列肽又可作为兴奋剂,促进损伤的器官与组织的再生、伤口的愈合等等,RGD作为某些整合素的受体,其选择性部分依赖于RGD的构象以及RGD周围的氨基酸残基。

为此,近几年,许多科技工作者合成了一系列RGD三肽、四肽、五肽等,还合成了RGD环肽、双线肽、RGD模拟肽等等。为了满足客户对各种RGD序列肽的需求,专肽生物提供最广泛的RGD序列肽库,以满足科研工作者对RGD肽的需求。
专肽生物提供各种RGD肽的现货,缩短科研工作者的项目时间,例如c(RGDfK)、c(RGDfC)、c(RADyK)、c(RGDyK)、c(RADfC)、环状多肽c(RGDfK)-巯基乙酸、c(RGDfK)-PEG2-巯基乙酸、Mpa-Ahx-c(RGDfK)、环状多肽c(RGDfK)-半胱氨酸、DOTA-c(RGDfK)、NOTA-c(RGDfK)、NOTA-c(RGDyK)、DOTA-c(RGDyK)、E[c(RGDfK)]2、E[c(RGDyK)]2、DDDDD-c(RGDfK)等等,具体可咨询销售人员。
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多肽H2N-Gly-Arg-Gly-Asp-Ser-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1.31g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1.18mmol Fmoc-Ser(tBu)-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2.36mmol DIPEA,1.12mmol 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-Ser(tBu)-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-Ser(tBu)-Linker-MBHA Resin
Fmoc-Asp(OtBu)-Ser(tBu)-Linker-MBHA Resin
H2N-Asp(OtBu)-Ser(tBu)-Linker-MBHA Resin
Fmoc-Gly-Asp(OtBu)-Ser(tBu)-Linker-MBHA Resin
H2N-Gly-Asp(OtBu)-Ser(tBu)-Linker-MBHA Resin
Fmoc-Arg(Pbf)-Gly-Asp(OtBu)-Ser(tBu)-Linker-MBHA Resin
H2N-Arg(Pbf)-Gly-Asp(OtBu)-Ser(tBu)-Linker-MBHA Resin
Fmoc-Gly-Arg(Pbf)-Gly-Asp(OtBu)-Ser(tBu)-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-Arg(Pbf)-Gly-Asp(OtBu)-Ser(tBu)-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-Arg-Gly-Asp-Ser-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。
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。
| 编号 | 名称 | CAS号 |
| 115150 | M细胞靶向肽GRGDS | 96426-21-0/2828433-23-2 |
| H2N-GRGDS-OH | ||
| GRGDS由5个氨基酸组成,它是一种M细胞靶向肽,可以特异性地结合M细胞顶端表达的β1整合素。 | ||





