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 >  Protein>ORF8 >OR8-C52H1

SARS-CoV-2 ORF8 Protein, His Tag (MALS verified)

分子别名(Synonym)

ORF8

表达区间及表达系统(Source)

SARS-CoV-2 ORF8 Protein, His Tag (OR8-C52H1) is expressed from human 293 cells (HEK293). It contains AA Phe 16 - Ile 121 (Accession # P0DTC8-1 ).

Predicted N-terminus: Phe 16

Request for sequence

蛋白结构(Molecular Characterization)

ORF8 Structure

This protein carries a polyhistidine tag at the C-terminus.

The protein has a calculated MW of 14.3 kDa. The protein migrates as 18-21 kDa when calibrated against Star Ribbon Pre-stained Protein Marker 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)

>90% 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.
 

电泳(SDS-PAGE)

ORF8 SDS-PAGE

SARS-CoV-2 ORF8 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 90% (With Star Ribbon Pre-stained Protein Marker).

SEC-MALS

ORF8 SEC-MALS

The purity of SARS-CoV-2 ORF8 Protein, His Tag (Cat. No. OR8-C52H1) is more than 85% and the molecular weight of this protein is around 30-44 kDa verified by SEC-MALS.

Report

 

背景(Background)

The viral protein encoded by open reading frame 8 (ORF8) of SARS-CoV-2, which shares the least homology with SARS-CoV among all viral proteins, directly interacts with MHC-Ι molecules and mediates their down-regulation. In ORF8-expressing cells, MHC-Ι molecules are selectively targeted for lysosomal degradation via autophagy. Thus, SARS-CoV-2–infected cells are much less sensitive to lysis by cytotoxic T lymphocytes.

 

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