XBP1 - X-box binding protein 1 Gene
Also Known as XBP2; TREB5; XBP-1; TREB-5
Species: Homo sapiens
About XBP1
This gene has 6 transcripts (splice variants), 197 orthologues and is associated with 1 phenotype. Ubiquitous expression in salivary gland (RPKM 196.1), urinary bladder (RPKM 191.7) and 25 other tissues.
Summary
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]
XBP1 Products (4)
| mRNA | Protein | Name |
|---|---|---|
| NM_001079539.2 | NP_001073007.1 | X-box-binding protein 1 isoform XBP1(S) |
| NM_001393999.1 | NP_001380928.1 | X-box-binding protein 1 isoform 3 |
| NM_001394000.1 | NP_001380929.1 | X-box-binding protein 1 isoform 4 |
| NM_005080.4 | NP_005071.2 | X-box-binding protein 1 isoform XBP1(U) |
| Cellular Component GO Annotation | Evidence | References | Source |
|---|---|---|---|
| part of RNA polymerase II transcription regulator complex |
IPI
IPI: Inferred from physical interaction
|
23661758 | GOA |
| located in cytoplasm |
IDA
IDA: Inferred from direct assay
|
16461360 | GOA |
| located in cytosol |
IDA
IDA: Inferred from direct assay
|
20348923 | GOA |
| located in endoplasmic reticulum |
IDA
IDA: Inferred from direct assay
|
23529610 | GOA |
| located in endoplasmic reticulum membrane |
IDA
IDA: Inferred from direct assay
|
25239945 | GOA |
| is active in nucleus |
IDA
IDA: Inferred from direct assay
|
16461360 | GOA |
| located in nucleus |
IDA
IDA: Inferred from direct assay
|
16461360 | GOA |
XBP1 Protein Structure
bZIP_2: Basic region leucine zipper (69 - 120)
- 0
- 100
- 200
- 261 a.a.
| Protein Preferred Names | Protein Names | |
|---|---|---|
|
X-box-binding protein 1 |
|
XBP1 Protein-protein interaction Information
|
Type
|
Protein Name | Protein ID | Interactor | Interactor Species | Interactor ID | Detection Method | References |
|---|---|---|---|---|---|---|---|
|
Intra
|
XBP1 | P17861 | UBE2V1 | Homo sapiens | Q13404 | 32296183 | |
|
Intra
|
XBP1 | P17861 | ATF6B | Homo sapiens | Q99941 | 23661758 | |
|
Intra
|
XBP1 | P17861 | CREBZF | Homo sapiens | Q9NS37 | 20102225 | |
|
Intra
|
XBP1 | P17861 | CREBZF | Homo sapiens | Q9NS37 | 23661758 | |
|
Intra
|
XBP1 | P17861 | XBP1 | Homo sapiens | P17861 | 20102225 | |
|
Intra
|
XBP1 | P17861 | XBP1 | Homo sapiens | P17861 | 23661758 | |
|
Intra
|
XBP1 | P17861 | XBP1 | Homo sapiens | P17861 | 12805554 | |
|
Intra
|
XBP1 | P17861 | ATF6 | Homo sapiens | P18850 | 23661758 | |
|
Intra
|
XBP1 | P17861 | ATF6 | Homo sapiens | P18850 | 20102225 |
XBP1 Antibodies
| Cat. No. | Product Name | Application | Reactivity |
|---|---|---|---|
| HY-P81679 | XBP1 Antibody (YA1424) | WB, IP | Human, Mouse |
| HY-P81679A | XBP1 Antibody (YA1424)(PBS only) | WB, IP | Human, Mouse |
| HY-P85412 | XBP1 Antibody (YA5104) | WB; IHC-P; IHC-F; ICC/IF; IF-Tissue | Human, Mouse, Rat |
| HY-P86543 | XBP1 Antibody (YA6235) | WB, IHC-P, ICC/IF, IP, ELISA | Human, Mouse, Rat |
Related Diseases
| Diseases | Alias | |
|---|---|---|
| Major Affective Disorder 7 |
|
|
| Fatty Liver Disease |
|
|
| Liver Disease |
|
|
| Bipolar Disorder |
|
|
| B-Cell Lymphoma |
|
|
| Breast Cancer |
|
|
| Epiphyseal Dysplasia, Multiple, With Early-Onset Diabetes Mellitus |
|
|
| Ileocolitis |
|
|
| Burkitt Lymphoma |
|
|
| Wolfram Syndrome 1 |
|
|
| Congenital Hypothyroidism |
|
|
| Inflammatory Bowel Disease |
|
|
| Myeloma, Multiple |
|
|
| Wolfram Syndrome |
|
|
| Common Variable Immunodeficiency |
|
|
| Retinal Degeneration |
|
|
| Cardiomyopathy, Familial Hypertrophic, 16 |
|
|
| Cardiomyopathy, Familial Hypertrophic, 18 |
|
|
| Cardiomyopathy, Familial Hypertrophic, 17 |
|
|
| Cystic Fibrosis |
|
|
| Schizophrenia |
|
|
| Amyotrophic Lateral Sclerosis 1 |
|
|
| Diabetes Mellitus |
|
|
| T-Cell Acute Lymphoblastic Leukemia |
|
|
| Type 2 Diabetes Mellitus |
|
|
| Nervous System Disease |
|
|
| Retinitis Pigmentosa |
|
|
Orthologs Information
| Species | Symbol | Source | ID |
|---|---|---|---|
| Mus musculus | XBP1 | MGD | MGI:98970 |
| Bos taurus | XBP1 | VGNC | VGNC:53930 |
| Rattus norvegicus | XBP1 | RGD | RGD:1303073 |
| Felis catus | XBP1 | VGNC | VGNC:67102 |
| Macaca mulatta | XBP1 | VGNC | VGNC:78806 |
| Others | XBP1 | NCBI |