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促黑素 Characteristic MSH-Tetra Peptide,H2N-Cys-DHis-DAla-DArg-DAla-DCys-DThr-DGlu-DArg-DIle-DSer-DThr-DIle-DCys-Met-Ser-Thr-DGlu-DThr-DArg-DAla-Pro-DGlu-DPro-DThr-DIle-DAsp-DGlu-COOH,H2N-C-DHis-DAla-DArg-DAla-DCys-DThr-DGlu-DArg-DIle-DSer-DThr-DIle-DCys-MST-DGlu-DThr-DArg-DAla-P-DGlu-DPro-DThr-DIle-DAsp-DGlu-OH,杭州专肽生物的产品

促黑素 Characteristic MSH-Tetra Peptide

编号:159241

CAS号:

单字母:H2N-CharacteristicMSTetraPeptide-OH

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  • 编号:159241
    中文名称:促黑素 Characteristic MSH-Tetra Peptide
    单字母:H2N-CharacteristicMSTetraPeptide-OH
    三字母:H2N

    N端氨基

    -Cys

    半胱氨酸

    -DHis

    D型组氨酸

    -DAla

    D型丙氨酸

    -DArg

    D型精氨酸

    -DAla

    D型丙氨酸

    -DCys

    D型半胱氨酸

    -DThr

    D型苏氨酸

    -DGlu

    D型谷氨酸

    -DArg

    D型精氨酸

    -DIle

    D型异亮氨酸

    -DSer

    D型丝氨酸

    -DThr

    D型苏氨酸

    -DIle

    D型异亮氨酸

    -DCys

    D型半胱氨酸

    -Met

    甲硫氨酸

    -Ser

    丝氨酸

    -Thr

    苏氨酸

    -DGlu

    D型谷氨酸

    -DThr

    D型苏氨酸

    -DArg

    D型精氨酸

    -DAla

    D型丙氨酸

    -Pro

    脯氨酸

    -DGlu

    D型谷氨酸

    -DPro

    D型脯氨酸

    -DThr

    D型苏氨酸

    -DIle

    D型异亮氨酸

    -DAsp

    D型天冬氨酸

    -DGlu

    D型谷氨酸

    -OH

    C端羧基

    氨基酸个数:28
    分子式:C125H209N39O46S4
    平均分子量:3122.49
    精确分子量:3120.41
    等电点(PI):8.53
    pH=7.0时的净电荷数:2.12
    平均亲水性:0.41923076923077
    疏水性值:-0.51
    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:D型氨基酸肽   

  • 很多蛋白在细胞中非常容易被降解,或被标记,进而被选择性地破坏。但含有部分D型氨基酸的多肽则显示了很强的抵抗蛋白酶降解能力。

  • 多肽H2N-Cys-DHis-DAla-DArg-DAla-DCys-DThr-DGlu-DArg-DIle-DSer-DThr-DIle-DCys-Met-Ser-Thr-DGlu-DThr-DArg-DAla-Pro-DGlu-DPro-DThr-DIle-DAsp-DGlu-COOH的合成步骤:

    1、合成CTC树脂:称取0.83g CTC Resin(如初始取代度约为1.19mmol/g)和1.19mmol Fmoc-DGlu(OtBu)-OH于反应器中,加入适量DCM溶解氨基酸(需要注意,此时CTC树脂体积会增大好几倍,避免DCM溶液过少),再加入2.96mmol DIPEA(Mw:129.1,d:0.740g/ml),反应2-3小时后,可不抽滤溶液,直接加入1ml的HPLC级甲醇,封端半小时。依次用DMF洗涤2次,甲醇洗涤1次,DCM洗涤一次,甲醇洗涤一次,DCM洗涤一次,DMF洗涤2次(这里使用甲醇和DCM交替洗涤,是为了更好地去除其他溶质,有利于后续反应)。得到  Fmoc-DGlu(OtBu)-CTC Resin。结构图如下:

    2、脱Fmoc: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-DGlu(OtBu)-CTC 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2.96mmol Fmoc-DAsp(OtBu)-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5.93mmol DIPEA,2.81mmol 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-DAsp(OtBu)-DGlu(OtBu)-CTC 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-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DAla-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DAla-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DArg(Pbf)-DAla-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DArg(Pbf)-DAla-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DAla-DArg(Pbf)-DAla-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DAla-DArg(Pbf)-DAla-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-DHis(Trt)-DAla-DArg(Pbf)-DAla-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    H2N-DHis(Trt)-DAla-DArg(Pbf)-DAla-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC Resin

    Fmoc-Cys(Trt)-DHis(Trt)-DAla-DArg(Pbf)-DAla-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC 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-Cys(Trt)-DHis(Trt)-DAla-DArg(Pbf)-DAla-DCys(Trt)-DThr(tBu)-DGlu(OtBu)-DArg(Pbf)-DIle-DSer(tBu)-DThr(tBu)-DIle-DCys(Trt)-Met-Ser(tBu)-Thr(tBu)-DGlu(OtBu)-DThr(tBu)-DArg(Pbf)-DAla-Pro-DGlu(OtBu)-DPro-DThr(tBu)-DIle-DAsp(OtBu)-DGlu(OtBu)-CTC 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-Cys-DHis-DAla-DArg-DAla-DCys-DThr-DGlu-DArg-DIle-DSer-DThr-DIle-DCys-Met-Ser-Thr-DGlu-DThr-DArg-DAla-Pro-DGlu-DPro-DThr-DIle-DAsp-DGlu-COOH。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。

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