General description
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. [provided by RefSeq, Jul 2008]
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Immunogen
A synthesized peptide corresponding to a sequence within amino acids 120-160 of human XBP1 [NP_005071.2].
Physical form
Solution in PBS (pH 7.4) containing 50% glycerol, and 0.02% sodium azide.
Other Notes
Gently mix before use. Optimal concentrations and conditions for each application should be determined by the user.
| biological source | rabbit (Monoclonal) |
| Quality Segment | 100 |
| recombinant | expressed in HEK 293 cells |
| conjugate | unconjugated |
| antibody form | affinity isolated antibody |
| antibody product type | primary antibodies |
| clone | 23GB4840, recombinant monoclonal |
| form | buffered aqueous glycerol solution |
| mol wt | 29 kDa |
| species reactivity | human |
| packaging | vial of 1.5 mL |
| enhanced validation | recombinant expression Learn more about Antibody Enhanced Validation |
| sustainability | Greener Alternative Product |
| concentration | 0.5 mg/ml |
| technique(s) | flow cytometry: 1:2000,western blot: 1:1,000-1:5,000 |
| isotype | IgG |
| Ensembl | human accession no. | ENSG00000100219 |
| NCBI accession no. | NP_005071.2 |
| UniProt accession no. | P17861 |
| greener alternative category | DfS-Developed |
| shipped in | wet ice |
| storage temp. | −20°C |
| target post-translational modification | unmodified |
| Gene Information | human ... XBP1(7494) |
