浙江省科技型企业---加速您的多肽研究
首页 >多肽产品 >缓激肽[Tyr8]Bradykinin

多肽产品

32222-00-7,缓激肽[Tyr8]Bradykinin,H2N-Arg-Pro-Pro-Gly-Phe-Ser-Pro-Tyr-Arg-COOH,H2N-RPPGFSPYR-OH,杭州专肽生物的产品

缓激肽[Tyr8]Bradykinin

编号:127110

CAS号:32222-00-7

单字母:H2N-RPPGFSPYR-OH

纠错
  • 编号:127110
    中文名称:缓激肽[Tyr8]Bradykinin
    英文名:[Tyr8]Bradykinin
    CAS号:32222-00-7
    单字母:H2N-RPPGFSPYR-OH
    三字母:H2N

    N端氨基

    -Arg

    精氨酸

    -Pro

    脯氨酸

    -Pro

    脯氨酸

    -Gly

    甘氨酸

    -Phe

    苯丙氨酸

    -Ser

    丝氨酸

    -Pro

    脯氨酸

    -Tyr

    酪氨酸

    -Arg

    精氨酸

    -OH

    C端羧基

    氨基酸个数:9
    分子式:C50H73N15O12
    平均分子量:1076.21
    精确分子量:1075.56
    等电点(PI):-
    pH=7.0时的净电荷数:3.97
    平均亲水性:0.08
    疏水性值:-1.46
    外观与性状:白色粉末状固体
    消光系数:1490
    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:缓激肽(Bradykinin)   

  • Definition

    Bradykinin is a nonapeptide that is mainly found in animal preparations that are treated with the venom of the snake, Bothrops jararaca1,2.  It dialates blood vessels that in turn leads to decrease in blood pressure2. Bradykinin analogs are slightly modified structural derivatives of bradykinin that perform similar functions as bradykinin3.

    Discovery

    Bradykinin was discovered in the blood plasma of animals that were treated with the venom from the Brazilian snake, Bothrops jararaca1,2.  The discovery was part of a study that was related to toxicology of snake bites.  Bradykinin analogs were synthesized by solid-phase techniques in 1975 and their function was studied in rats and rabbits3.

    Classification

    Bradykinin is a 9 amino acid peptide that belongs to the kinin family of proteins4.  It has homologs in several animals including other snakes, frog, dog and humans4.

    Structural Characteristics

    Bradykinin has the sequence Arg-Pro-Pro-Gly-Phe-Ser-Pro-Phe-Arg3.  Several analogs of bradykinin have been synthesized. They are also nanopeptides containing substitutions of various amino acids of bradykinin. For example two analogs of bradykinin were synthesized one with 7-beta-homo-L-proline and the other with 8-beta-homo-L-phenylalanine substitutions3.  It was found that both of them are resistant to enzymatic degradation3.

    Mode of action

    Bradykinin binds to two different kinin G protein coupled receptors- B1 and B25.  Upon binding to these receptors it induces conversion of GTP to GDP which in turn triggers the conversion ATP to cAM which then acts as a second messenger resulting in the activation of genes.  B1 receptor is expressed as a result of tissue injury and is found to play a role in inflammation while B2 receptor participates in the vasodilatory role of bradykinin5,6.  Bradykinin analogs function is a similar fashion although depending on their structure they might have varying affinities to the receptors compared to bradykinin7. Also analogs of bradykinin have been synthesized that are specific to one of these receptors7.

    Functions

    Bradykinin is a potent endothelium-dependent vasodilator, causes contraction of non-vascular smooth muscle, increases vascular permeability and also is involved in the mechanism of pain. Bradykinin also causes natriuresis, contributing to a drop in blood pressure8. Bradykinin raises internal calcium levels in neocortical astrocytes causing them to release glutamate9. Overactivation of bradykinin is thought to play a role in a rare disease called Hereditary Angioedema, also known as Hereditary Angio-Neurotic Edema10. 

    Some analogs of bradykinin have been found to have prolonged hypotensive action compared to bradykinin (Eg: beta-H-Pro-bradykinin)3.  Some analogs have relative or even lower potencies compared to bradykinin (Eg: HArg1-Bradykinin and HArg9 Bradykinin)7.  Other analogs have been studied for their potential of finding bradykinin antagonists that might be useful in the treatment of angio-neurotic edema.  

    References

    1.     Partridge, SM (1948). (Title or abstract not available), Biochem. J., 42, 238.

    2.     Allen PK, Kusumam J, Yoji S, Yoshitaka N, Berhane G, Sesha R and Michael S (1998). Bradykinin formation: Plasma and tissue pathways and cellular interactions. Clinical reviews in allergy and immunology, 16, 4, 403-429.

    3.     Ondetti MA, Engel SL (1975). Bradykinin analogs containing beta.-homoamino acid, J. Med. Chem.,18 (7), 761–763.

    4.     Roseli A, Gomes S, Jair RC, Luis J and Valdemar H (1996). Met-Lys-Bradykinin-Ser, the kinin released from human kininogen by human pepsin. Immunopharmacology, 32, 76-79.

    5.    Peter GM, Amrita A, and Mauro P (2000). Association between Kinin B1 Receptor Expression and Leukocyte Trafficking across Mouse Mesenteric Postcapillary Venules. J Exp. Med., 192, 367-380.

    6.     Duchene J, Lecomte F, Ahmed S, Cayla C, Pesquero J, Bader M, Perretti M and Ahluwalia A, (2007). A Novel Inflammatory Pathway Involved in Leukocyte Recruitment: Role for the Kinin B1 Receptor and the Chemokine CXCL5. J Immunol., 179, 4849-4856.

    7.     Max ES, Phyllis AL (1974). Synthesis and pharmacology of homoarginine bradykinin analog. J. Med. Chem., 17 (11), pp 1227–1228.

    8.     Dendorfer A, Wolfrum S, Wagemann M, Qadri F, Dominiak P, (2001). Pathways of bradykinin degradation in blood and plasma of normotensive and hypertensive rats. Am J Physiol Heart Circ Physiol., 280:H2182

    9.     Kuoppala A, Lindstedt KA, Saarinen J, Kovanen PT, Kokkonen JO (2000). Inactivation of bradykinin by angiotensin-converting enzyme and by carboxypeptidase N in human plasma. Am J Physiol Heart Circ Physiol, 278(4):H1069-74.

    10.   Bas M, Adams V, Suvorava T, Niehues T, Hoffmann TK, Kojda G (2007). Nonallergic angioedema: role of bradykinin. Allergy, 62(8):842-56.

  • 多肽H2N-Arg-Pro-Pro-Gly-Phe-Ser-Pro-Tyr-Arg-COOH的合成步骤:

    1、合成CTC树脂:称取0.78g CTC Resin(如初始取代度约为0.4mmol/g)和0.37mmol Fmoc-Arg(Pbf)-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0.94mmol 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-Arg(Pbf)-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-Arg(Pbf)-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0.94mmol Fmoc-Tyr(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1.87mmol DIPEA,0.89mmol 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-Tyr(tBu)-Arg(Pbf)-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-Tyr(tBu)-Arg(Pbf)-CTC Resin

    Fmoc-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    H2N-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    Fmoc-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    H2N-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    Fmoc-Phe-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    H2N-Phe-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    Fmoc-Gly-Phe-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    H2N-Gly-Phe-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    Fmoc-Pro-Gly-Phe-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    H2N-Pro-Gly-Phe-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    Fmoc-Pro-Pro-Gly-Phe-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    H2N-Pro-Pro-Gly-Phe-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-CTC Resin

    Fmoc-Arg(Pbf)-Pro-Pro-Gly-Phe-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-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-Arg(Pbf)-Pro-Pro-Gly-Phe-Ser(tBu)-Pro-Tyr(tBu)-Arg(Pbf)-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-Arg-Pro-Pro-Gly-Phe-Ser-Pro-Tyr-Arg-COOH。结构图见产品结构图。

    切割液选择:1)TFA:H2O=95%:5%、TFA:H2O=97.5%:2.5%

    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

    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。

  • 暂时没有数据