Human CD84 HEK293 Overexpression Lysate: Product Information
This Human CD84 overexpression lysate was created in HEK293 Cells and intented for use as a Western blot (WB) positive control. Purification of CD84 protein (Cat: 10100-H08H) from the overexpression lysate was verified.
A DNA sequence encoding the extracellular domain (Met 1-Gly 225) of human CD84 (NP_003865.1) was expressed with a C-terminal polyhistidine tag.
The recombinant human CD84 consists of 215 amino acids and has a predicted molecular mass of 24 kDa. As a result of glycosylation, the apparent molecular mass of rhCD84 is approximately 45 kDa in SDS-PAGE under reducing conditions.
Human CD84 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 CD84 HEK293 Overexpression Lysate: Alternative Names
Human hCD84 Overexpression Lysate; Human LY9B Overexpression Lysate; Human mCD84 Overexpression Lysate; Human SLAMF5 Overexpression Lysate
CD84 Background Information
The CD2 family receptors are type I transmembrane glycoproteins belonging to immunoglobulin (Ig) superfamily characterized by a membrane-proximal Ig constant 2 (C2) domain and a membrane-distal variable (V) domain that is responsible for ligand recognition. CD84, also known as LY9B and SLAMF5, is a homophilic member of the SLAM (signaling lymphocyte activation molecule) subfamily of the CD2 family. The SLAM family receptorsmediate signal transduction through the interaction of its ITSM (immunoreceptor tyrosine-based switch motifs) in the intracellular region and the SH2 domain of adaptor molecules SAP (SLAM-associated protein) and EAT-2 (EWS-activated transcript 2), and accordingly modulate both adaptive and innate immune responses. The CD84-CD84 interaction was independent of its cytoplasmic tail. Thus, CD84 is its own ligand and acts as a costimulatory molecule. CD84 is expressed on cells from almost all hematopoietic lineages and on CD34+ hematopoietic progenitor cells, suggesting that CD84 serves as a marker for committed hematopoietic progenitor cells.
Martin M, et al. (2001) CD84 functions as a homophilic adhesion molecule and enhances IFN-gamma secretion: adhesion is mediated by Ig-like domain 1. J Immunol. 167(7): 3668-76.
Tangye SG, et al. (2002) CD84 is up-regulated on a major population of human memory B cells and recruits the SH2 domain containing proteins SAP and EAT-2. Eur J Immunol. 32(6): 1640-9.
Zaiss M, et al. (2003) CD84 expression on human hematopoietic progenitor cells. Exp Hematol. 31(9): 798-805.
Tangye SG, et al. (2003) Functional requirements for interactions between CD84 and Src homology 2 domain-containing proteins and their contribution to human T cell activation. J Immunol. 171(5): 2485-95.
Yan Q, et al. (2007) Structure of CD84 provides insight into SLAM family function. Proc Natl Acad Sci U S A. 104(25): 10583-8.
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