Anti-XBP1 Rabbit pAb

Antibody type:Primary antibody

Label:Unconjugated

Modification:Unmodification

Isotype:Rabbit IgG

Host:Rabbit

Application:WB,IF

Purify method:Affinity purified

Species:Human,Mouse,Rat

Gene Name:XBP1

Synonyms:XBP2; TREB5; XBP-1; TREB-5

Gene Synonyms:

Gene Full Name:X-box binding protein 1

Gene Infomation: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. [provided by RefSeq, Jul 2008]

Antigen:Recombinant fusion protein containing a sequence corresponding to amino acids 1-261 of human XBP1 (NP_005071.2).

Antigen Synonyms:X-box-binding protein 1

Clonality:Polyclonal antibody

Source:Human

Reaction:

Form:Liquid

Tested Applications:

• Western blot (1:100 to 1:500)
• Immunofluorescence (1:50 to 1:400)
• Immunohistochemistry (1:200 to 1:500)
• Flow cytometry analysis (1:200 to 1:500)
• Enzyme-linked Immunosorbent Assay (1:100-1:5000)

Note: Users are strongly advised to determine the optimal dilution of antibody to use for their specific applications.

Clone:

Dilution:WB1:500 -1:2000; IF1:50 -1:200(Optimal dilutions should be determined by the end user)

Mole Mass:42kDa

Location:Cytoplasm, Endoplasmic reticulum, Membrane, Nucleus

Concentration:

Sequence Similarity:

Gene Id:

SwissProt ID:P17861

Unigene:7494

Nucleotide Accession:

Tissue specificity:Expressed in plasma cells in rheumatoid synovium (PubMed:11460154). Over-expressed in primary breast cancer and metastatic breast cancer cells (PubMed:25280941). Isoform 1 and isoform 2 are expressed at higher level in proliferating as compared to confluent quiescent endothelial cells (PubMed:19416856).

Storage:Store at -20°C. Avoid freeze / thaw cycles.

Buffer condition:PBS with 0.02% sodium azide, 50% glycerol, pH7.3.

Background:

Molar Function:Functions as a transcription factor during endoplasmic reticulum (ER) stress by regulating the unfolded protein response (UPR). Required for cardiac myogenesis and hepatogenesis during embryonic development, and the development of secretory tissues such as exocrine pancreas and salivary gland . Involved in terminal differentiation of B lymphocytes to plasma cells and production of immunoglobulins (PubMed:11460154). Modulates the cellular response to ER stress in a PIK3R-dependent manner (PubMed:20348923). Binds to the cis-acting X box present in the promoter regions of major histocompatibility complex class II genes (PubMed:8349596). Involved in VEGF-induced endothelial cell (EC) proliferation and retinal blood vessel formation during embryonic development but also for angiogenesis in adult tissues under ischemic conditions. Functions also as a major regulator of the UPR in obesity-induced insulin resistance and type 2 diabetes for the management of obesity and diabetes prevention .

Western Blot: 

Stability: The thermal stability is described by the loss rate. The loss rate was determined by accelerated thermal degradation test, that is, incubate the protein at 37°C for 48h, and no obvious degradation and precipitation were observed. The loss rate is less than 5% within the expiration date under appropriate storage condition.

Storage: Store at 4°C for frequent use. Stored at -20°C in a manual defrost freezer for one year without detectable loss of activity. Avoid repeated freeze-thaw cycles.

Notes: For In vitro laboratory use only. Not for any clinical, therapeutic, or diagnostic use in humans or animals. Not for animal or human consumption.