膜杰作
Star Staining
分子别名（Synonym）
Envelope glycoprotein gp120/gp120 (HIV)
表达区间及表达系统（Source）
HIV-1 [HIV-1/Clade C (16055)] GP120, His Tag (GP5-V15224) is expressed from human 293 cells (HEK293). It contains AA Thr 34 - Arg 506 (Accession # ABL67444.1).
Predicted N-terminus: Thr 34
Request for sequence
蛋白结构（Molecular Characterization）
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 54.1 kDa. The protein migrates as 85-130 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
纯度（Purity）
>95% as determined by SDS-PAGE.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
Contact us for customized product form or formulation.
重构方法（Reconstitution）
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
存储（Storage）
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
质量管理控制体系（QMS）
电泳（SDS-PAGE）
HIV-1 [HIV-1/Clade C (16055)] GP120, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95%.
活性（Bioactivity）-ELISA
Immobilized Human CD4, Fc Tag (Cat. No. CD4-H5259) at 2 μg/mL (100 μL/well) can bind HIV-1 [HIV-1/Clade C (16055)] GP120, His Tag (Cat. No. GP5-V15224) with a linear range of 0.5-63 ng/mL (QC tested).
Protocol
- 176XXXXXXX0
- 从技术服务知道了这家公司，我们在多项目上委托了BLI服务，服务体验很好，数据及报告做的很漂亮。后续就从百普赛斯直接购买了蛋白，实验数据稳定，蛋白纯度及实验响应比较出色，供货稳定。成为了我们的关键试剂。
- 2022-9-5
- 156XXXXXXX8
- 我们采购该蛋白用于检测自主开发的抗TROP-2抗体的亲和力，通过OCTET检测其亲和动力学，我们用已经获批的IMMU132进行了测试，其亲和动力学常数为nM级别(1.05nM)。
- 2022-4-6
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背景（Background）
Human Immunodeficiency Virus (HIV) can be divided into two major types, HIV type 1 (HIV-1) and HIV type 2 (HIV-2). HIV-1 is related to viruses found in chimpanzees and gorillas living in western Africa. HIV-2 is related to viruses found in sooty mangabeys. HIV-1 viruses may be further divided into groups. The HIV-1 group M viruses predominate and are responsible for the AIDS pandemic. Some of the HIV-1 group M subtypes are known to be more virulent or are resistant to different medications. HIV-2 viruses are thought to be less virulent and transmissible than HIV-1 M group viruses.
Envelope glycoprotein GP120 (or gp120) is the name of the glycoprotein which forms the spikes sticking out of a HIV virus particle. gp120 is essential for virus entry into cells as it plays a vital role in seeking out specific cell surface receptors for entry. Three gp120s, bound as heterodimers to a transmembrane glycoprotein, gp41, are thought to combine in a trimer to form the envelope spike, which is involved in virus-cell attachment. One half of the molecular weight of gp120 is due to the carbohydrate side chains (the "glyco-" in "glycoprotein"). These are sugar residues which form something almost like a sugar "dome" over the gp120 spikes. This dome prevents gp120 from being recognised by the human immune response. As the HIV virus and the human CD4 cell come together, the gp120 binding site "snaps open" at the last minute.The glycoprotein gp120 is anchored to the viral membrane, or envelope, via non-covalent bonds with the transmembrane glycoprotein, gp41. It is involved in entry into cells by binding to CD4 receptors, particularly helper T-cells. Binding to CD4 is mainly electrostatic although there are van der Waals interactions and hydrogen bonds.
