|Datasheet||Specific References||Reviews||Related Products||Protocols|
|Vector Type||Mammalian Expression Vector|
|Expression Method||Constiutive, Stable / Transient|
|Selection In Mammalian Cells||Hygromycin|
FLAG-tag, or FLAG octapeptide, is a polypeptide protein tag that can be added to a protein using recombinant DNA technology. It can be used for affinity chromatography, then used to separate recombinant, overexpressed protein from wild-type protein expressed by the host organism. It can also be used in the isolation of protein complexes with multiple subunits.
A FLAG-tag can be used in many different assays that require recognition by an antibody. If there is no antibody against the studied protein, adding a FLAG-tag to this protein allows one to follow the protein with an antibody against the FLAG sequence. Examples are cellular localization studies by immunofluorescence or detection by SDS PAGE protein electrophoresis.
The peptide sequence of the FLAG-tag from the N-terminus to the C-terminus is: DYKDDDDK (1012 Da). It can be used in conjunction with other affinity tags, for example a polyhistidine tag (His-tag), HA-tag or Myc-tag. It can be fused to the C-terminus or the N-terminus of a protein. Some commercially available antibodies (e.g., M1/4E11) recognize the epitope only when it is present at the N-terminus. However, other available antibodies (e.g., M2) are position-insensitive.
|Human CTNNB1 ORF mammalian expression plasmid, C-GFPSpark tag||HG11279-ACG|
|Human CTNNB1 ORF mammalian expression plasmid, C-OFPSpark / RFP tag||HG11279-ACR|
|Human CTNNB1 ORF mammalian expression plasmid, N-GFPSpark tag||HG11279-ANG|
|Human CTNNB1 ORF mammalian expression plasmid, N-OFPSpark / RFP tag||HG11279-ANR|
|Human CTNNB1 ORF mammalian expression plasmid, C-Flag tag||HG11279-CF|
|Human CTNNB1 ORF mammalian expression plasmid, C-His tag||HG11279-CH|
|Human CTNNB1 ORF mammalian expression plasmid, C-Myc tag||HG11279-CM|
|Human CTNNB1 ORF mammalian expression plasmid, C-HA tag||HG11279-CY|
|Human CTNNB1 Gene cDNA clone plasmid||HG11279-M|
|Human CTNNB1 natural ORF mammalian expression plasmid, HA tag||HG11279-M-Y|
|Human CTNNB1 ORF mammalian expression plasmid, N-Flag tag||HG11279-NF|
|Human CTNNB1 ORF mammalian expression plasmid, N-His tag||HG11279-NH|
|Human CTNNB1 ORF mammalian expression plasmid, N-Myc tag||HG11279-NM|
|Human CTNNB1 ORF mammalian expression plasmid, N-HA tag||HG11279-NY|
|Human CTNNB1 natural ORF mammalian expression plasmid||HG11279-UT|
|Learn more about expression Vectors|
beta-Catenin, also known as CTNNB1, is a member of the armadillo family of proteins. These proteins have multiple copies of the so-called armadillo repeat domain, which is specialized for protein-protein binding. It is part of a complex of proteins that constitute adherens junctions (AJs). AJs are necessary for the creation and maintenance of epithelial cell layers by regulating cell growth and adhesion between cells. CTNNB1 also anchors the actin cytoskeleton and may be responsible for transmitting the contact inhibition signal that causes cells to stop dividing once the epithelial sheet is complete. Finally, beta-Catenin binds to the product of the APC gene, which is mutated in adenomatous polyposis of the colon. Defects in beta-Catenin can cause colorectal cancer, pilomatrixoma (PTR), medulloblastoma, and ovarian cancer. CTNNB1 is a key dowstream component of the canonical Wnt signaling pathway. In the absence of Wnt, it forms a complex with AXIN1, AXIN2, APC, CSNK1A1 and GSK3B that promotes phosphorylation on N-terminal Ser and Thr residues and ubiquitination of CTNNB1 via BTRC and its subsequent degradation by the proteasome. In the presence of Wnt ligand, beta-Catenin is not ubiquitinated and accumulates in the nucleus, where it acts as a coactivator for transcription factors of the TCF/LEF family, leading to activate Wnt responsive genes. CTNNB1 is involved in the regulation of cell adhesion. The majority of beta-catenin is localized to the cell membrane and is part of E-cadherin/catenin adhesion complexes which are proposed to couple cadherins to the actin cytoskeleton.