Lane 1: HepG2
Lane 2: 293T
Recombinant Rabbit monoclonal primary
Recombinant XBP1 Monoclonal Antibody (ET1703-23)
Hela, 293T, HepG2, SW480, human liver tissue, human colon cancer tissue.
Store at +4C after thawing. Aliquot store at -20C or -80C. Avoid repeated freeze / thaw cycles.
1*TBS (pH7.4), 0.05% BSA, 40% Glycerol. Preservative: 0.05% Sodium Azide.
Protein A purified.
Tax responsive element binding protein 5 antibody; Tax-responsive element-binding protein 5 antibody; TREB5 antibody; X box binding protein 1 antibody; X box binding protein 2 antibody; X-box-binding protein 1 antibody; XBP 1 antibody; XBP-1 antibody; XBP1 antibody; XBP1_HUMAN antibody; XBP2 antibody
Belongs to the bZIP family.
Expressed in plasma cells in rheumatoid synovium. Over-expressed in primary breast cancer and metastatic breast cancer cells. Isoform 1 and isoform 2 are expressed at higher level in proliferating as compared to confluent quiescent endothelial cells.
[Isoform 2]: Acetylated by EP300; acetylation positively regulates the transcriptional activity of XBP1 isoform 2. Isoform 2 is deacetylated by SIRT1; deacetylation negatively regulates the transcriptional activity of XBP1 isoform 2.; [Isoform 1]: Ubiquitinated, leading to proteasome-mediated degradation in response to ER stress.; X-box-binding protein 1, cytoplasmic form and luminal form are produced by intramembrane proteolytic cleavage of ER membrane-anchored isoform 1 triggered by HM13/SPP in a DERL1-RNF139-dependent and VCP/p97-independent manner. X-box-binding protein 1, luminal form is ubiquitinated leading to proteasomal degradation.
Nucleus, Chromosome, Chromosome.
The X-box binding protein-1 (XBP-1 or hXBP-1), also designated tax-responsive element-binding protein 5 (TREB5) in mouse and human, or hepatocarcinogenesis-related transcription factor (HTF) in rat, belongs to the basic region/leucine zipper (bZIP) family of transcription factors. XBP-1 was first characterized as a protein that binds to the HLA-DRα promoter in B cells. XBP-1 recognizes the cAMP responsive element (CRE) in enhancers of human T cell leukemia virus and major histocompatibility complex class II genes and activates transcription of these genes. It is expressed at high levels in developing bone and its levels are modulated during osteoblast development, suggesting a role in regulation of expression of osteoblast-specific genes. In addition to binding to CRE sequences, XBP-1 has been shown to bind to TPA response elements (TREs).