I TAC Mouse

I-TAC (CXCL11) Mouse Recombinant
Cat. No.
BT16334
Source
Escherichia Coli.
Synonyms

C-X-C motif chemokine 11, I-TAC, Small-inducible cytokine B11, Cxcl11, Scyb11.

Appearance
Sterile Filtered White lyophilized (freeze-dried) powder.
Purity
Greater than 98.0% as determined by:
(a) Analysis by RP-HPLC.
(b) Analysis by SDS-PAGE.
Usage
THE BioTek's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
Shipped with Ice Packs
In Stock

Description

I TAC Mouse Recombinant produced in E.Coli is a single, non-glycosylated, polypeptide chain containing 79 amino acids and having a molecular mass of 9.1kDa.

Product Specs

Introduction

Chemokine (C-X-C motif) ligand 11 (CXCL11), also known as I-TAC, is a small cytokine that belongs to the CXC chemokine family. It is primarily expressed in leukocytes, pancreas, and liver, with moderate levels in the thymus, spleen, and lungs. Lower expression levels are found in the small intestine, placenta, and prostate. The expression of CXCL11 is significantly increased by interferon-gamma (IFN-γ) and interferon-beta (IFN-β), and slightly induced by interferon-alpha (IFN-α). I-TAC exerts its effects by binding to the CXCR3 chemokine receptor on target cells, exhibiting a stronger affinity compared to other ligands like CXCL9 and CXCL10. Notably, I-TAC acts as a chemoattractant for activated T cells. The gene encoding CXCL11 is situated on human chromosome 4, alongside several other members of the CXC chemokine family.

Description
Recombinant Mouse I-TAC, produced in E. coli, is a single, non-glycosylated polypeptide chain consisting of 79 amino acids. It has a molecular weight of 9.1 kDa.
Physical Appearance
Sterile Filtered White lyophilized (freeze-dried) powder.
Formulation
I-TAC protein was lyophilized from a 0.2 µm filtered solution concentrated to 10 mM Sodium Citrate, pH 4.0, with 600 mM NaCl.
Solubility
To reconstitute the lyophilized I-TAC, it is recommended to dissolve it in sterile 18 MΩ-cm H2O to a concentration of at least 100 µg/ml. This solution can then be further diluted into other aqueous solutions.
Stability
Lyophilized I-TAC remains stable at room temperature for up to 3 weeks. However, for long-term storage, it is recommended to store it desiccated below -18°C. Once reconstituted, I-TAC should be stored at 4°C for no more than 2-7 days. For extended storage periods, adding a carrier protein like 0.1% HSA or BSA is advisable.
Avoid repeated freeze-thaw cycles.
Purity
The purity of I-TAC is greater than 98.0%, as determined by:
(a) Reverse-phase high-performance liquid chromatography (RP-HPLC) analysis.
(b) Sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) analysis.
Biological Activity
The biological activity of I-TAC, determined through a chemotaxis bioassay using murine CXCR3 transfected 293 cells, is comparable to the standard. It exhibits full biological activity within a concentration range of 10-100 ng/ml, corresponding to a specific activity of 10,000-100,000 IU/mg.
Synonyms

C-X-C motif chemokine 11, I-TAC, Small-inducible cytokine B11, Cxcl11, Scyb11.

Source
Escherichia Coli.
Amino Acid Sequence
FLMFKQGRCL CIGPGMKAVK MAEIEKASVI YPSNGCDKVE VIVTMKAHKR QRCLDPRSKQ ARLIMQAIEK KNFLRRQNM.

Product Science Overview

Gene and Protein Structure

The gene encoding mouse CXCL11 is located on chromosome 5, in close proximity to the genes for IP-10 and MIG . The mouse CXCL11 cDNA encodes a precursor protein consisting of 100 amino acids, which includes a 21 amino acid signal peptide. This signal peptide is cleaved to produce the mature protein, which is 79 amino acids in length . The mature mouse CXCL11 shares 71% amino acid sequence identity with its human counterpart .

Expression and Regulation

Mouse CXCL11 is expressed in various tissues, including the lung, heart, small intestine, and kidney, particularly during endotoxemia . Its expression is strongly induced by interferon-gamma (IFN-γ) and can be attenuated by glucocorticoid treatment . This chemokine is also upregulated in certain pathological conditions, such as AIDS, dementia, and multiple sclerosis .

Biological Function

CXCL11 plays a crucial role in the immune system by acting as a chemoattractant for activated T-cells. It binds to the CXC receptor 3 (CXCR3), which is predominantly expressed on activated T-cells . This interaction leads to the migration of T-cells to sites of inflammation, thereby contributing to the immune response.

Recombinant Mouse CXCL11

Recombinant mouse CXCL11 is produced using an E. coli expression system . The recombinant protein is typically purified to a high degree of purity (≥ 98%) and is free from endotoxins . It is used in various research applications, including cell culture, ELISA, and functional assays to study its biological activity and interactions .

Applications in Research

Recombinant mouse CXCL11 is widely used in immunological research to study T-cell migration and the role of chemokines in immune responses. It is also used in assays to investigate the signaling pathways activated by CXCR3 and to explore potential therapeutic targets for diseases involving immune dysregulation .

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