Recombinant Human herpesvirus 1 ICP47 protein (US12)

Code CSB-YP360979HWY
Size US$436
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  • (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
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Product Details

Greater than 90% as determined by SDS-PAGE.
Target Names
Uniprot No.
Research Area
Alternative Names
US12; ICP47 protein; Immediate-early protein IE12; Immediate-early-5; Infected cell protein 47; US12 protein; Vmw12
Human herpesvirus 1 (strain 17) (HHV-1) (Human herpes simplex virus 1)
Expression Region
Target Protein Sequence
Note: The complete sequence including tag sequence, target protein sequence and linker sequence could be provided upon request.
Mol. Weight
Protein Length
Full Length
Tag Info
N-terminal 6xHis-tagged
Liquid or Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol.
Note: If you have any special requirement for the glycerol content, please remark when you place the order.
If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.
Troubleshooting and FAQs
Storage Condition
Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time
Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet & COA
Please contact us to get it.

The fusion tag N-terminal 6xHis tag gene was added to the gene sequence corresponding to the yeast of the HHV-1 US12 protein to form the recombinant DNA. The recombinant DNA was cloned into the expression vector and then transfected into the yeast cells for expression. Following purification, the product is the recombinant HHV-1 US12 protein carrying N-terminal 6xHis tag. The SDS-PAGE assessed the purity of this recombinant US12 protein up to 90%. It had an apparent molecular weight of approximately 14 kDa.

US12 is gene providing instructions for making a protein named human herpesvirus 1 ICP47 protein (abbreviated US12) and belongs to Herpesviridae US12 family. US12, a HSV immediate early protein, is small protein produced by the herpes simplex virus, is considered as an important factor in the evasion of cellular immune responses in HSV-infected cells. It is expressed very early after infection and can inhibit CD8+ T cell recognition of infected cells. Recent studies have established clearly that ICP47 can bind with high affinity to human TAP and inhibit the transport of peptides into the endoplasmic reticulum.

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Target Background

Plays a role in the inhibition of host immune response. Binds specifically to transporters associated with antigen processing (TAP), thereby blocking peptide-binding and translocation by TAP as well as subsequent loading of peptides onto MHC class I molecules. Empty MHC I molecules are retained in the endoplasmic reticulum and ultimately directed to proteasomal degradation. In consequence, infected cells are masked for immune recognition by cytotoxic T-lymphocytes.
Gene References into Functions
  1. The structure shows that herpes simplex virus ICP47 traps human TAP in an inactive conformation distinct from the normal transport cycle. PMID: 27935481
  2. cryo-electron microscopy structure of human TAP in complex with its inhibitor ICP47, a small protein produced by the herpes simplex virus I PMID: 26789246
  3. Results indicate that recombinant adenovirus r-H-ICP47 had the abilities of reducing the proliferation of lymphocytes activated by dendritic cells (DCs). PMID: 23774531
Subcellular Location
Host cytoplasm. Host nucleus.
Protein Families
Herpesviridae US12 family
Database Links

KEGG: vg:2703441

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