XBP1 Rabbit Polyclonal Antibody

Specifications

Product Data
Applications	IHC, WB
Reactivity	Human
Host	Rabbit
Clonality	Polyclonal
Immunogen	The immunogen is a synthetic peptide directed towards the N terminal region of human XBP1
Specificity	Expected reactivity: Cow, Dog, Horse, Human, Pig, Rabbit Homology: Cow: 79%; Dog: 83%; Horse: 79%; Human: 100%; Pig: 93%; Rabbit: 92%
Formulation	Liquid. Purified antibody supplied in 1x PBS buffer with 0.09% (w/v) sodium azide and 2% sucrose. Note that this product is shipped as lyophilized powder to China customers.
Concentration	lot specific
Purification	Affinity Purified
Conjugation	Unconjugated
Storage Condition	For short term use, store at 2-8°C up to 1 week. For long term storage, store at -20°C in small aliquots to prevent freeze-thaw cycles.
Predicted Protein Size	29kDa
Gene Name	X-box binding protein 1
Database Link	NP_005071 Entrez Gene 7494 Human UniProt ID P17861
Background	XBP1 is a transcription factor that regulates MHC class II genes by binding to a promoter element referred to as an X box. XBP1 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.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	TREB5; XBP-1; XBP2
Reference Data
Protein Families	Transcription Factors

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