Invitrogen™ XBP1 Polyclonal Antibody

Rabbit Polyclonal Antibody

Supplier:  Invitrogen™ PA595907

Catalog No. PIPA595907

Description

Positive Samples: 293T, NCI-H460, Mouse eye, Rat liver, Rat eye; Cellular Location: Cytoplasm, Endoplasmic reticulum membrane, Endoplasmic reticulum, Membrane, Nucleus, Peripheral membrane protein, Single-pass type II membrane protein Immunogen sequence: NVVVKIEEAP LSPSENDHPE FIVSVKEEPV EDDLVPELGI SNLLSSSHCP KPSSCLLDAY SDCGYGGSLS PFSDMSSLLG VNHSWEDTFA NELFPQLISV.

XBP1 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.

Specifications

• Antigen: XBP1
• Classification: Polyclonal
• Conjugate: Unconjugated
• Gene: Xbp1
• Gene Alias: D11Ertd39e; Hepatocarcinogenesis-related transcription factor; HTF; OTTHUMP00000028682; Tax-responsive element-binding protein 5; tax-responsive element-binding protein 5 homolog; TREB5; TREB-5; X-box binding protein 1; X-box-binding protein 1; X-box-binding protein 1, cytoplasmic form; X-box-binding protein 1, luminal form; XBP1; XBP-1; XBP2
• Host Species: Rabbit
• Purification Method: Affinity chromatography
• Regulatory Status: RUO
• Gene ID (Entrez): 22433, 289754, 7494
• Content And Storage: -20°C, Avoid Freeze/Thaw Cycles
• Form: Liquid

• Applications: ELISA, Western Blot, Immunocytochemistry
• Concentration: 0.66 mg/mL
• Formulation: PBS with 50% glycerol and 0.02% sodium azide; pH 7.3
• Gene Accession No.: O35426, P17861, Q9R1S4
• Gene Symbols: Xbp1
• Immunogen: A synthetic peptide corresponding to a sequence within amino acids 277-376 of human XBP1 (NP_001073007.1).
• Quantity: 100 μL
• Primary or Secondary: Primary
• Target Species: Human, Mouse, Rat
• Product Type: Antibody
• Isotype: IgG

Safety and Handling

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