Recombinant Rat Inducible T-Cell Costimulator (ICOS) Protein (His)

Name: Recombinant Rat Inducible T-Cell Costimulator (ICOS) Protein (His)
Brand: Beta LifeScience
SKU: BLC-08660P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

Collections: Antibody / cell therapy targets, Antibody therapeutic / adc target proteins, Co-stimulatory receptors, Featured immune checkpoint protein molecules, Immune checkpoint proteins, Recombinant proteins

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Product Overview

Description	Recombinant Rat Inducible T-Cell Costimulator (ICOS) Protein (His) is produced by our E.coli expression system. This is a extracellular protein.
Purity	Greater than 90% as determined by SDS-PAGE.
Uniprotkb	Q9R1T7
Target Symbol	ICOS
Synonyms	Icos; Ailim; Inducible T-cell costimulator; Activation-inducible lymphocyte immunomediatory molecule; CD antigen CD278
Species	Rattus norvegicus (Rat)
Expression System	E.coli
Tag	N-6His
Target Protein Sequence	ELNDLANHRMFSFHDGGVQISCNYPETVQQLKMQLFKDREVLCDLTKTKGSGNTVSIKNPMSCPYQLSNNSVSFFLDNADSSQGSYFLCSLSIFDPPPFQEKNLSGGYLLIYESQLCCQLKLWLP
Expression Range	21-145aa
Protein Length	Extracellular Domain
Mol. Weight	18.1kDa
Research Area	Immunology
Form	Liquid or Lyophilized powder
Buffer	Liquid form: default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution	Briefly centrifuged the vial prior to opening to bring the contents to the bottom. Reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL. It is recommended to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. The default final concentration of glycerol is 50%.
Storage	1. Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. 2. Avoid repeated freeze-thaw cycles. 3. Store working aliquots at 4°C for up to one week. 4. In general, protein in liquid form is stable for up to 6 months at -20°C/-80°C. Protein in lyophilized powder form is stable for up to 12 months at -20°C/-80°C.
Notes	Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Target Details

Target Function	Enhances all basic T-cell responses to a foreign antigen, namely proliferation, secretion of lymphokines, up-regulation of molecules that mediate cell-cell interaction, and effective help for antibody secretion by B-cells. Essential both for efficient interaction between T and B-cells and for normal antibody responses to T-cell dependent antigens. Does not up-regulate the production of interleukin-2, but superinduces the synthesis of interleukin-10. Prevents the apoptosis of pre-activated T-cells. Plays a critical role in CD40-mediated class switching of immunoglobin isotypes.
Subcellular Location	Membrane; Single-pass type I membrane protein.
Database References	KEGG: rno:64545 STRING: 10116.ENSRNOP00000064455 UniGene: Rn.168816
Tissue Specificity	Strongly expressed in the spleen and lung. Lower expression seen in liver, kidney and testis.

Gene Functions References

ICOS-targeted siRNA can effectively silence gene expression of ICOS, and provided satisfactory treatment efficacy for myocardial cell hypertrophy after infarction. PMID: 27323062
ICOS siRNA can protect brain tissues from ischemia injuries after cerebral infarction, improve limb movement and coordination, lower the mortality rate of rats, and inhibit T cell-induced cytokines PMID: 26436531
our data highlight a key role for ICOS signaling in the generation of imbalanced production of IL-10 and IL-17 by Treg cells in a rat model of spondyloarthritis. PMID: 24909668

FAQs

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.