XBP1
Reactivity: Human
ELISA
Host: Mouse
Monoclonal
1C4
unconjugated
Application Notes
Optimal working dilution should be determined by the investigator.
Restrictions
For Research Use only
Format
Liquid
Concentration
0.25 mg/mL
Buffer
PBS with 0.09 % (W/V) sodium azide
Preservative
Sodium azide
Precaution of Use
This product contains sodium azide: a POISONOUS AND HAZARDOUS SUBSTANCE which should be handled by trained staff only.
Handling Advice
Avoid repeated freezing and thawing.
Storage
4 °C/-20 °C
Storage Comment
Store at 2 - 8 °C for up to six months or (in aliquots) at -20 °C for longer.
Target
XBP1
(X-Box Binding Protein 1 (XBP1))
Alternative Name
XBP1 / TREB5
Background
This gene encodes a transcription factor that regulates MHC class II genes by binding to a promoter element referred to as an X box. This gene product is a bZIP protein, which was also identified as a cellular transcription factor that binds to an enhancer in the promoter of the T cell leukemia virus type 1 promoter. It may increase expression of viral proteins by acting as the DNA binding partner of a viral transactivator. It has been found that upon accumulation of unfolded proteins in the endoplasmic reticulum (ER), the mRNA of this gene is processed to an active form by an unconventional splicing mechanism that is mediated by the endonuclease inositol-requiring enzyme 1 (IRE1). The resulting loss of 26 nt from the spliced mRNA causes a frame-shift and an isoform XBP1(S), which is the functionally active transcription factor. The isoform encoded by the unspliced mRNA, XBP1(U), is constitutively expressed, and thought to function as a negative feedback regulator of XBP1(S), which shuts off transcription of target genes during the recovery phase of ER stress. A pseudogene of XBP1 has been identified and localized to chromosome 5.Synonyms: Tax-responsive element-binding protein 5, X-box-binding protein 1, XBP-1, XBP2