产品概述：Purified recombinant protein of Human X-box binding protein 1 (XBP1), transcript variant 2, full length, with N-terminal GST and C-terminal HIS tag, expressed in E. coli, 50ug

蛋白长度：A DNA sequence encoding human full-length XBP1

表达系统：E. coli

种属：Human

标签类型：N-GST and C-His

分子量：68 kDa

通用名：XBP1

总结：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]

形式：Liquid

浓度：>50 ug/mL as determined by microplate BCA method

纯度：> 80% as determined by SDS-PAGE and Coomassie blue staining

储存溶液：25mM Tris, pH8.0, 150mM NaCl, 10% glycerol, 1%Sarkosyl.

别名：TREB-5; TREB5; XBP-1; XBP2