CoraLite® Plus 488-conjugated XBP1S/XBP1U Polyclonal antibody

• Featured Product
• KD/KO Validated

XBP1S/XBP1U Polyclonal Antibody for FC (Intra)

Host / Isotype

Rabbit / IgG

Reactivity

human, mouse

Applications

FC (Intra)

Conjugate

CoraLite® Plus 488 Fluorescent Dye

Cat no : CL488-24168

Synonyms

TREB5, X box binding protein 1, XBP 1, XBP1, XBP2

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Validation Data Gallery

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  FC experiment of HepG2 using CL488-24168

  1X10^6 HepG2 cells were intracellularly stained with 0.8 ug CoraLite® Plus 488 Anti-Human XBP1S/XBP1U (CL488-24168) (red), or 0.8 ug CoraLite® Plus 488-conjugated Rabbit IgG control Rabbit PolyAb (CL488-30000, Clone: ) (blue). Cells were fixed and permeabilized with Transcription Factor Staining Buffer Kit (PF00011).

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Tested Applications

• Positive FC detected in: HepG2 cells

Recommended dilution

• Flow Cytometry (FC): FC : 0.80 ug per 10^6 cells in a 100 µl suspension

It is recommended that this reagent should be titrated in each testing system to obtain optimal results.

Sample-dependent, Check data in validation data gallery.

Product Information

CL488-24168 targets XBP1S/XBP1U in FC (Intra) applications and shows reactivity with human, mouse samples.

• Tested Reactivity: human, mouse
• Host / Isotype: Rabbit / IgG
• Class: Polyclonal
• Type: Antibody
• Immunogen: XBP1S/XBP1U fusion protein Ag21454
• Full Name: X-box binding protein 1
• Calculated Molecular Weight: 261 aa, 29 kDa
• Observed Molecular Weight: ~32 kDa; ~60 kDa
• GenBank Accession Number: BC000938
• Gene Symbol: XBP1
• Gene ID (NCBI): 7494
• Conjugate: CoraLite® Plus 488 Fluorescent Dye
• Excitation/Emission Maxima Wavelengths: 493 nm / 522 nm
• Form: Liquid
• Purification Method: Antigen affinity purification
• Storage Buffer: PBS with 50% Glycerol, 0.05% Proclin300, 0.5% BSA, pH 7.3.
• Storage Conditions: Store at -20°C. Avoid exposure to light. Stable for one year after shipment. Aliquoting is unnecessary for -20^oC storage. 20ul sizes contain 0.1% BSA.

Background Information

XBP1 is also named as XBP2, belongs to the bZIP family. The X-box-binding protein-1 (XBP1) is a transcriptional regulator of the ER stress response that lies downstream of inositol-requiring enzyme 1 (IRE1α) activation (PMID: 14559994). IRE1α possesses both kinase and ribonuclease activity and processes XBP1 mRNA to produce an active transcription factor in response to ER stress (PMID: 11779464, 11780124). It has been found that upon accumulation of unfolded proteins in the endoplasmic reticulum, 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. The resulting loss of 26 nt from the spliced mRNA causes a frame-shift and an isoform XBP1S, which is the functionally active transcription factor. The isoform encoded by the unspliced mRNA, XBP1U, is constitutively expressed, and thought to function as a negative feedback regulator of XBP1S, which shuts off transcription of target genes during the recovery phase of ER stress (PMID: 11850408). The unspliced XBP1U isoform is composed of 261 amino acid residues, and the spliced XBP1S isoform is composed of 376 amino acid residues. The XBP1 antibody (24168-1-AP) can detect both XBP1U and XBP1S.