Basic infomation

source

Mouse

Clonality

Polyclonal

Isotype

IgG

Reactivity

H M R

MW (kDa)

29kDa

Purification

Antigen affinity purfication

UniProt ID

P17861

NCBI Gene

7494

Applications

Tested Applications

WB,

Cited Applications

WB, IHC, IF

Product Usage

Information

Western Blotting

1:500-1:2000

Immunohistochemistry

1:200-1:400

Immunofluorescence

1:200-1:400

Storage

PBS with 50% glycerol and less than 0.02% sodium azide

Store at –20°C, stable for one year after shipment

Do not aliquot the antibody

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.

Abbreviation

H: human M: mouse R: rat Rb: rabbit Hm: hamster Mk: monkey Vir: virus C: chicken  Z: zebrafish Dg: dog Pg: pig Hr: horse