Overview
| Product name | Recombinant Human VSIG4 Protein |
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| Catalog No. | RP01391 |
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| Description | Recombinant Human VSIG4 Protein is produced by HEK293 cells expression system. The target protein is expressed with sequence (Arg20-Pro283) of human VSIG4 (Accession #NP_009199.1) fused with a 6×His tag at the C-terminus. |
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| Purity | > 95% by SDS-PAGE. |
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| Endotoxin | <0.1EU/μg |
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| Formulation | Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4. |
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| Species | Human |
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| Calculated MW | 30.02 kDa |
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Background
VSIG4 (V-set and immunoglobulin domain containing 4), also known as complement receptor of the immunoglobulin superfamily (CRIg) and Z39Ig, is a type I transmembrane glycoprotein. It is a B7 family-related protein and an Ig superfamily member. In contrast to the B7 family members which contain two IgG domains, VSIG4 contains one complete V-type I g domain and a truncated C-type I g domain. VSIG4 is exclusively expressed on tissue resident macrophages and binds to multimers of C3b and iC3b that are covalently attached to particle surfaces. No VSIG4 expression appears to be present in T and B cells. VSIG4 functions as a negative regulator of T cell activation, and may be involved in the maintenance of peripheral T cell tolerance, and is also identified as a potent suppressor of established inflammation. Mouse VSIG4 is synthesized as a 28 amino acid precursor that contains a signal sequence, a V-type I g domain (aa 36-115), one potential N-linked glycosylation site, and a single transmembrane domain. The V-type I g domain of mouse VSIG4 shares 86% and 8% aa sequence identity with the V-type I g domains of rat and human VSIG4, respectively.
Product information
| Synonym | CRIg; Z39IG; VSIG4; VSIG4; CRIg; Z39IG; VSIG4 |
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| Expression Host | HEK293 cells |
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| Tag | C-His |
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| Swiss-Prot | |
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| Gene ID | |
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Usage guide
| Storage | Store at -20℃.Store the lyophilized protein at -20℃ to -80 ℃ up to 1 year from the date of receipt.
After reconstitution, the protein solution is stable at -20℃ for 3 months, at 2-8℃ for up to 1 week. |
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| Reconstitution | Centrifuge the vial before opening. Reconstitute to a concentration of 0.1-0.5 mg/mL in sterile distilled water. Avoid vortex or vigorously pipetting the protein. For long term storage, it is recommended to add a carrier protein or stablizer (e.g. 0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose), and aliquot the reconstituted protein solution to minimize free-thaw cycles. |
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* For research use only. Not for therapeutic or diagnostic purposes.
