Viral Details

Viral Backbone

Human Adenovirus Type5 (dE1/E3)

Promoter

CMV

Reporter

none, optional GFP, CFP, YFP, RFP or mCherry

Storage Buffer

DMEM, 2% BSA, 2.5% Glycerol

Gene Details

Species

Human

Gene Symbol

XBP1

Gene Name

X-box binding protein 1

Gene ID

7494

Gene Synonyms

TREB-5; TREB5; XBP-1; XBP2

ORF Size

786 bp

RefSeq#

BC000938

Gene Description

XBP1 encodes a transcription factor that regulates MHC class II genes by binding to a promoter element referred to as an X box. XBP1 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.

UniGene ID

Hs.437638

HGNC ID

HGNC:12801