Human CD19 Membrane Protein Lentivirus

Titer Determination Method

RT-qPCR

Sterility Testing

Negative

Mycoplasma Testing

Negative

Transfection Efficiency

Positive (if EGFP is included in the transfer plasmid)

Endotoxin Level

Based on specific requirements

Application

Stable cell line generation; Protein expression; Biochemical assays

Safety Notes

Since the HIV genes are expressed from packaging plasmids devoid of the packing signal, none of the HIV genes will be expressed in the transduced cells. The pseudotyped lentiviruses need to be used in a Biosafety Level 2 facility even if they are replication-incompetent.

Shipping

Dry ice

Storage

Store at -80°C and avoid repeated freeze-thaw cycles.

Full Name

CD19 molecule

Introduction

This gene encodes a member of the immunoglobulin gene superfamily. Expression of this cell surface protein is restricted to B cell lymphocytes. This protein is a reliable marker for pre-B cells but its expression diminishes during terminal B cell differentiation in antibody secreting plasma cells. The protein has two N-terminal extracellular Ig-like domains separated by a non-Ig-like domain, a hydrophobic transmembrane domain, and a large C-terminal cytoplasmic domain. This protein forms a complex with several membrane proteins including complement receptor type 2 (CD21) and tetraspanin (CD81) and this complex reduces the threshold for antigen-initiated B cell activation. Activation of this B-cell antigen receptor complex activates the phosphatidylinositol 3-kinase signalling pathway and the subsequent release of intracellular stores of calcium ions. This protein is a target of chimeric antigen receptor (CAR) T-cells used in the treatment of lymphoblastic leukemia. Mutations in this gene are associated with the disease common variable immunodeficiency 3 (CVID3) which results in a failure of B-cell differentiation and impaired secretion of immunoglobulins. CVID3 is characterized by hypogammaglobulinemia, an inability to mount an antibody response to antigen, and recurrent bacterial infections. Alternative splicing results in multiple transcript variants encoding distinct isoforms.

Alternative Names

CD19; B4; CVID3; B-lymphocyte antigen CD19; B-lymphocyte surface antigen B4; T-cell surface antigen Leu-12; differentiation antigen CD19; CD19 molecule

Gene ID

UniProt ID