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Hexa-His是由6个His残基组成的肽,用作重组蛋白的金属结合位点。
编号:184961
CAS号:64134-30-1
单字母:H2N-HHHHHH-OH
编号: | 184961 |
中文名称: | 标签多肽6xHis、His6、His-tag、Hexa His |
英文名: | His-tag、His6 |
CAS号: | 64134-30-1 |
单字母: | H2N-HHHHHH-OH |
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。 -HisL-组氨酸:histidine。系统命名为(2S)-氨基-3-(4-咪唑基)丙酸。其侧链带有弱碱性的咪唑基,为编码氨基酸。是幼小哺乳动物的必需氨基酸。符号:H,His。 -HisL-组氨酸:histidine。系统命名为(2S)-氨基-3-(4-咪唑基)丙酸。其侧链带有弱碱性的咪唑基,为编码氨基酸。是幼小哺乳动物的必需氨基酸。符号:H,His。 -HisL-组氨酸:histidine。系统命名为(2S)-氨基-3-(4-咪唑基)丙酸。其侧链带有弱碱性的咪唑基,为编码氨基酸。是幼小哺乳动物的必需氨基酸。符号:H,His。 -HisL-组氨酸:histidine。系统命名为(2S)-氨基-3-(4-咪唑基)丙酸。其侧链带有弱碱性的咪唑基,为编码氨基酸。是幼小哺乳动物的必需氨基酸。符号:H,His。 -HisL-组氨酸:histidine。系统命名为(2S)-氨基-3-(4-咪唑基)丙酸。其侧链带有弱碱性的咪唑基,为编码氨基酸。是幼小哺乳动物的必需氨基酸。符号:H,His。 -HisL-组氨酸:histidine。系统命名为(2S)-氨基-3-(4-咪唑基)丙酸。其侧链带有弱碱性的咪唑基,为编码氨基酸。是幼小哺乳动物的必需氨基酸。符号:H,His。 -OHC端羧基:C-terminal carboxyl group。在肽或多肽链中含有游离羧基的氨基酸一端。在表示氨基酸序列时,通常将C端放在肽链的右边。 |
氨基酸个数: | 6 |
分子式: | C36H44N18O7 |
平均分子量: | 840.85 |
精确分子量: | 840.36 |
等电点(PI): | - |
pH=7.0时的净电荷数: | 2.39 |
平均亲水性: | -0.5 |
疏水性值: | -3.2 |
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。 |
储存条件: | 负80℃至负20℃ |
标签: | 多肽标签(Tag) |
6xHis对蛋白的结构和特性几乎没有影响,因此一般纯化后无需去除标签。
Hexa-His 是由 6 个组氨酸构成的六肽,常作为融合蛋白的金属结合位点。
Hexa-His is a peptide consisting of 6 His residues, used as a metal binding site for the recombinant protein.
Hexa His是由6个组氨酸残基依次连接组成的氨基酸序列,也被称为hexa histidine-tag、6×His-tag或His-tag。Hexa His负责脑和其它组织中GM2神经节苷脂及各种末端包含N-乙酰己糖胺的降解。B形式对某些低聚糖是有活性的,而S形式没有可测量的活性。Hexa His作为重组蛋白的金属结合位点。His-Tag序列通过使用分子生物学公司提供的载体可以添加到靶蛋白的N末端或C末端。该标签后面连接的通常是特异性蛋白酶的酶切位点,如Leu-Val-Arg-Gly-Ser肽序列,被凝血酶识别并切割。
Hexa His is an amino acid sequence consisting of 6 His residues in a row, it is also known as hexa histidine-tag, 6xHis-tag, and by the trademarked name His-tag. Hexa His Responsible for the degradation of GM2 gangliosides, and a variety of other molecules containing terminal N-acetyl hexosamines, in the brain and other tissues. The form B is active against certain oligosaccharides. The form S has no measurable activity. Hexa His acts as a metal binding site for a recombinant protein. His-Tag sequence can be placed on the N- or -terminal of a target protein by using vectors from various commercial molecular biology companies. And this Tag is often followed by a cleavage site for a specific protease - for example Leu-Val-Arg-Gly-Ser peptide sequence is recognized and cleaved by the protease known as thrombin.
References:
1. Hengen, P (1995). "Purification of His-Tag fusion proteins from Escherichia coli". Trends in Biochemical Sciences 20 (7): 285–6.
Peptide H-HHHHHH-OH is a Research Peptide with significant interest within the field academic and medical research. Recent citations using H-HHHHHH-OH include the following: Coordination of the six-mer peptide Gly-His-Pro-His-His-Gly to CuII and PdII N-methyliminodiacetate complexes as IMAC chelation site models Y Chen, R Pasquinelli, M Ataai, RR Koepsel - Journal of inorganic , 1999 - Elsevierhttps://www.sciencedirect.com/science/article/pii/S0162013499001294 Coordination of two high-affinity hexamer peptides to copper (II) and palladium (II) models of the peptide-metal chelation site on IMAC resins Y Chen, R Pasquinelli, M Ataai, RR Koepsel - Inorganic , 2000 - ACS Publicationshttps://pubs.acs.org/doi/abs/10.1021/ic990520z Characterisation by immobilised metal ion affinity chromatographic procedures of the binding behaviour of several synthetic peptides designed to have high affinity for VV Kronina, HJ Wirth, MTW Hearn - Journal of Chromatography A, 1999 - Elsevierhttps://www.sciencedirect.com/science/article/pii/S0021967399007530 Formation of mixed ionic complementary peptide fibrils S Boothroyd , A Saiani , AF Miller - Macromolecular symposia, 2008 - Wiley Online Libraryhttps://onlinelibrary.wiley.com/doi/abs/10.1002/masy.200851320 Deciphering Interactions Involved in Immobilized Metal Ion Affinity Chromatography and Surface Plasmon Resonance for Validating the Analogy between Both R Irankunda, JA Cama EchavarracaÂ\xada, C Paris - Inorganics, 2024 - mdpi.comhttps://www.mdpi.com/2304-6740/12/1/31 Comparison of Energy-Minimized Structures of PdII(N-methyliminodiacetate) Complexes of X1-His-X3-His-His Peptides as an Analysis of Steric and Specific MS Ward, M Ataai, RR Koepsel - Biotechnology , 2001 - Wiley Online Libraryhttps://aiche.onlinelibrary.wiley.com/doi/abs/10.1021/bp010050n Selective N-terminal acylation of peptides and proteins with a Gly-His tag sequence MC Martos-Maldonado, CT Hjuler, KK Sorensen - Nature , 2018 - nature.comhttps://www.nature.com/articles/s41467-018-05695-3 His-Tag Design for Efficient 99mTc(CO)3+ and 188Re(CO)3+ Labeling of Proteins for Molecular Imaging and Radionuclide Therapy by Analysis of Peptide JD Williams, F Kampmeier, A Badar - Bioconjugate , 2020 - ACS Publicationshttps://pubs.acs.org/doi/abs/10.1021/acs.bioconjchem.0c00561
专肽生物可以提供常见抗体制备、免疫学研究等生物科研需求的各类标签多肽(Tag peptide)以及蛋白底物产品,可用荧光标记(FITC、5-Fam)等。除常见抗体中抗原决定部位的标签多肽(tag: His | c-Myc | HA | FLAG | V5 | X-press | VSV tag | T7 tag | Snoop tag | E-tag | Sof tag 1 | Spy tag |等等),我们还提供各类定制标签肽的合成,并可提供荧光标记(FITC、5-Fam)等。同时,免费提供的MS和HPLC分析报告。
DOI | 名称 | |
---|---|---|
10.1021/ic500387u | Insight into the coordination and the binding sites of Cu(2+) by the histidyl-6-tag using experimental and computational tools | 下载 |
10.1002/jssc.201800969 | Carboxymethylated polyethylenimine modified magnetic nanoparticles specifically for purification of His-tagged protein | 下载 |
多肽H2N-His-His-His-His-His-His-COOH的合成步骤:
1、合成CTC树脂:称取0.79g CTC Resin(如初始取代度约为0.76mmol/g)和0.72mmol Fmoc-His(Trt)-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1.8mmol 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-His(Trt)-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-His(Trt)-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1.8mmol Fmoc-His(Trt)-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3.6mmol DIPEA,1.71mmol 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-His(Trt)-His(Trt)-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-His(Trt)-His(Trt)-CTC Resin
Fmoc-His(Trt)-His(Trt)-His(Trt)-CTC Resin
H2N-His(Trt)-His(Trt)-His(Trt)-CTC Resin
Fmoc-His(Trt)-His(Trt)-His(Trt)-His(Trt)-CTC Resin
H2N-His(Trt)-His(Trt)-His(Trt)-His(Trt)-CTC Resin
Fmoc-His(Trt)-His(Trt)-His(Trt)-His(Trt)-His(Trt)-CTC Resin
H2N-His(Trt)-His(Trt)-His(Trt)-His(Trt)-His(Trt)-CTC Resin
Fmoc-His(Trt)-His(Trt)-His(Trt)-His(Trt)-His(Trt)-His(Trt)-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-His(Trt)-His(Trt)-His(Trt)-His(Trt)-His(Trt)-His(Trt)-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-His-His-His-His-His-His-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
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