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 >  Protein>IFN-alpha/beta R2 >IFA-R52H1

Rat IFN-alpha/beta R2 Protein, His Tag

分子别名(Synonym)

IFNAR2,IFNARB,IFNABR,IFN-R-2,IFN-alpha,beta receptor 2

表达区间及表达系统(Source)

Rat IFN-alpha/beta R2 Protein, His Tag (IFA-R52H1) is expressed from human 293 cells (HEK293). It contains AA Phe 31 - Ala 244 (Accession # M0R8H7-1).

Predicted N-terminus: Phe 31

Request for sequence

蛋白结构(Molecular Characterization)

IFN-alpha/beta R2 Structure

This protein carries a polyhistidine tag at the C-terminus

The protein has a calculated MW of 26.7 kDa. The protein migrates as 34-44 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:

  1. -20°C to -70°C for 12 months in lyophilized state;
  2. -70°C for 3 months under sterile conditions after reconstitution.

质量管理控制体系(QMS)

  1. 质量管理体系(ISO, GMP)
  2. 质量优势
  3. 质控流程
 

电泳(SDS-PAGE)

IFN-alpha/beta R2 SDS-PAGE

Rat IFN-alpha/beta R2 Protein, 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%.

 
评论(0)
  1. 中科院苏州纳米所
  2. 4人赞
  3. 一直在用ACRO的蛋白,质量是有保证的,主要质控还很好,批次间差异小。这次的RBD使我们拿到了很多特异性抗体。加油!
  4. >
  5. 2020-7-4
 
ACRO质量管理体系
 
 

背景(Background)

Interferon alpha/beta receptor 2 (IFR2) is also known as IFN-alpha binding protein, IFN-alpha/beta receptor 2, Type I interferon receptor 2, IFBR and IFRB, which is a single-pass type I membrane protein and belongs to the type II cytokine receptor family. IFR2 can associate with IFR1 to form the type I interferon receptor. IFR2 is a receptor for interferons alpha and beta.IFR2 involves in IFN-mediated STAT1, STAT2 and STAT3 activation. Isoform 1 and isoform 2 of IFR2 are directly involved in signal transduction due to their association with the TYR kinase, JAK1. Isoform 3 of IFR2 is a potent inhibitor of type I IFN receptor activity.Genetic variations in IFR2 influence susceptibility to hepatitis B virus (HBV) infection.

 

前沿进展

Validation of a cell-based colorimetric reporter gene assay for the evaluation of Type I Interferons
Mejía-Calvo, Muñoz-García, Jiménez-Uribe et al
Biotechnol Rep (Amst) (2019) 22, e00331
Abstract: The biotherapeutic type I interferons (IFN-I) are indicated to treat several diseases. These products are regulated to guarantee safety and efficacy through critical quality attributes. For this purpose, the development of robust assays is required, followed by its validation to demonstrate their suitability for its intended purpose. Despite there are some commercial kits to evaluate IFN-I signaling, these are focused on measuring in vitro biological response instead of their validation, which is a pharmaceutical industry requirement. The aim of this work was to validate the HEK-Blue IFN-α/β system evaluating the biological activity of IFN-α/β under good laboratory practices, according to international standards. Our results demonstrated that HEK-Blue IFN-α/β system comply with accuracy (r2>0.95) precision (CV < 20%) and specificity for both IFN-α/β; confirming that this assay is robust for this biotherapeutics' evaluation. Thereby, this bioassay could be implemented as a complementary method to the classical anti-proliferative and anti-viral assays under quality control environments.
IL-15 induces IFN-beta and iNOS gene expression, and antiviral activity of murine macrophage RAW 264.7 cells
Liu, Zhai, Schaffner et al
Immunol Lett (2004) 91 (2-3), 171-8
Abstract: The effects of interleukine-15 (IL-15) on macrophage activation and antiviral activity have been investigated in this study. We have provided evidence that IL-15 stimulates murine macrophage RAW 264.7 cells to release nitric oxide (NO) and inhibit vaccinia virus (VV) replication in bystander human 293 cells in a dose-dependent manner. The IL-15-induced antiviral activity was partially mediated by NO, as blocking NO production by NO synthase (iNOS) inhibitor NG-monomethyl-L-arginine acetate (L-NMA) partially restored the virus replication. Interferon-gamma (IFN-gamma) was not detectable by ELISA in the cell supernatant of IL-15-activated macrophages or in the co-cultures of macrophages and infected bystander cells. Neutralizing anti-IFN-gamma, anti-IFN-gamma receptor R2, anti-TNF-alpha, or anti-IL-12 antibodies had no effect on NO production or antiviral activity. In contrast, neutralizing anti-IFN-alpha/beta antibody completely restored the VV replication and reduced the NO level to one third of that in the control. Elevated mRNA levels of IFN-beta and iNOS genes were detected in IL-15-activated RAW 264.7 cells by RT-PCR. Our data suggest that IL-15 is capable of inducing IFN-beta, which could participate in NO-mediated antiviral effect.
Cellular responses in chickens treated with IFN-alpha orally or inoculated with recombinant Marek's disease virus expressing IFN-alpha
Jarosinski, Jia, Sekellick et al
J Interferon Cytokine Res (2001) 21 (5), 287-96
Abstract: Mammalian type I interferons (IFN-alpha/beta) are potent mediators of innate antiviral immune responses, in particular through enhancement of natural killer (NK) cell cytotoxicity. Recently, chicken IFN-alpha (ChIFN-alpha) has been identified and shown to ameliorate Newcastle disease virus (NDV) infection when given to chickens at relatively high concentrations in the drinking water. In this report, the effect of recombinant ChIFN-alpha (rChIFN-alpha) on NK cell cytotoxicity was examined using (51)Cr-release assays. NK cell cytotoxic activity was also analyzed following inoculation with attenuated Marek's disease virus (MDV) serotype 1 strain R2/23 and a recombinant MDV (parent strain R2/23)-expressing ChIFN-alpha [rMDV(IFN-alpha)]. Treatment of chickens with high doses of rChIFN-alpha in the drinking water significantly decreased NK cell cytotoxicity compared with untreated chickens over a 7-day period. Inoculation of chickens with R2/23 significantly decreased NK cell cytotoxicity as well, whereas the rMDV(IFN-alpha) had no effect on NK cell cytotoxicity. Treatment of chicken embryo cell cultures with rChIFN-alpha inhibited replication of the very virulent MDV RB-1B strain in vitro, and oral treatment of chickens with rChIFN-alpha reduced MDV R2/23 replication in vivo.
Showing 1-3 of 3 papers.
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