Human PD-1 HEK293 Overexpression Lysate: Product Information
This Human PD-1 overexpression lysate was created in HEK293 Cells and intented for use as a Western blot (WB) positive control. Purification of PD-1 protein (Cat: 10377-H03H) from the overexpression lysate was verified.
A DNA sequence encoding the extracellular domain (Met 1-Gln 167) of human PD1 (NP_005009.2) was fused with the C-terminal polyhistidine-tagged Fc region of human IgG1 at the C-terminus.
The recombinant human PD1/Fc is a disulfide-linked homodimeric protein. The reduced monomer consists of 390 amino acids and has a calculated molecular mass of 43.84 kDa. As a result of glycosylation, human PD1/Fc monomer migrates as an approximately 55-66 kDa protein in SDS-PAGE under reducing conditions.
Human PD-1 HEK293 Overexpression Lysate: Usage Guide
Cell lysate was prepared by homogenization of the over-expressed cells in ice-cold modified RIPA Lysis Buffer with cocktail of protease inhibitors (Sigma). Cell debris was removed by centrifugation. Protein concentration was determined by Bradford assay (Bio-Rad protein assay, Microplate Standard assay). The cell lysate was boiled for 5 min in 1 x SDS loading buffer (50 mM Tris-HCl pH 6.8, 12.5% glycerol, 1% sodium dodecylsulfate, 0.01% bromophenol blue) containing 5% b-mercaptoethanol, and lyophilized.
1. Centrifuge the tube for a few seconds and ensure the pellet at the bottom of the tube.
2. Re-dissolve the pellet using 200μL pure water and boil for 2-5 min.
1 X Sample Buffer (1 X modified RIPA buffer+1 X SDS loading buffer).
Stability & Storage
Store at 4℃ for up to twelve months from date of receipt. After re-dissolution, aliquot and store at -80℃ for up to twelve months. Avoid repeated freeze-thaw cycles.
Western Blot (WB) Optimal dilutions/concentrations should be determined by the end user.
Human PD-1 HEK293 Overexpression Lysate: Synonyms
Human CD279 Overexpression Lysate; Human hPD-1 Overexpression Lysate; Human hPD-l Overexpression Lysate; Human hSLE1 Overexpression Lysate; Human PD-1 Overexpression Lysate; Human PD1 Overexpression Lysate; Human SLEB2 Overexpression Lysate
PD-1 Background Information
Programmed cell death 1, also known as PDCD1, is a type I transmembrane glycoprotein, and is an immunoreceptor belonging to the CD28/CTLA-4 family negatively regulates antigen receptor signaling by recruiting protein tyrosine phosphatase, SHP-2 upon interacting with either of two ligands, PD-L1 or PD-L2. PD1 inhibits the T-cell proliferation and production of related cytokines including IL-1, IL-4, IL-10 and IFN-γ by suppressing the activation and transduction of PI3K/AKT pathway. In addition, coligation of PD1 inhibits BCR-mediating signal by dephosphorylating key signal transducer. PD1 has been suggested to be involved in lymphocyte clonal selection and peripheral tolerance, and thus contributes to the prevention of autoimmune diseases. Furthermore, PD1 is shown to be a regulator of virus-specific CD8+ T cell survival in HIV infection. As a cell surface molecule, PDCD1 regulates the adaptive immune response. Engagement of PD-1 by its ligands PD-L1 or PD-L2 transduces a signal that inhibits T-cell proliferation, cytokine production, and cytolytic function.
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