Gene Information
Gene NameXBP2
OrganismHomo sapiens (Human)
Gene Length261
Protein NamesX-box-binding protein 1 (XBP-1) (Tax-responsive element-binding protein 5) (TREB-5) [Cleaved into: X-box-binding protein 1, cytoplasmic form; X-box-binding protein 1, luminal form]
Target NameNA
Target TypeNA
Gene AgeNA
Evolutionary StageNA
AlphaFoldDBP17861
Gene CardXBP1
Uniprot IDP17861
PfamPF07716
In ASDno
Allosteric PredictionNA
Ortholog in AnimalsNA
OhnologsNA
ParalogsNA
TissueNA
Tissue SpecificityExpressed 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). {ECO:0000269|PubMed:11460154, ECO:0000269|PubMed:19416856, ECO:0000269|PubMed:25280941}.
Pharmacological Animal ModelsNULL(Chimpanzee);NULL(Mouse);0.001000(Rat);NULL(Rabbit)
Gene Ontology
(biological process)
Gene Ontology
(cellular component)
Gene Ontology
(molecular function)
PDB 6R5Q  (EM  3.00A  )  6R6G  (EM  3.70A  )  6R6P  (EM  3.10A  )  6R7Q  (EM  3.90A  ) 
DBSNP rs1379560430 
Subcellular location [CC]Endoplasmic reticulum {ECO:0000269|PubMed:23529610}. Note=Colocalizes with ERN1 and KDR in the endoplasmic reticulum in endothelial cells in a vascular endothelial growth factor (VEGF)-dependent manner (PubMed:23529610). {ECO:0000269|PubMed:23529610}.;
[Isoform 1]: Nucleus {ECO:0000269|PubMed:16461360, ECO:0000269|PubMed:19394296}. Cytoplasm {ECO:0000269|PubMed:16461360, ECO:0000269|PubMed:19394296, ECO:0000269|PubMed:20348923, ECO:0000269|PubMed:25190803}. Endoplasmic reticulum membrane {ECO:0000269|PubMed:25239945};
Single-pass type II membrane protein {ECO:0000269|PubMed:25239945}. Endoplasmic reticulum membrane {ECO:0000303|PubMed:25239945};
Peripheral membrane protein {ECO:0000303|PubMed:25239945}. Membrane {ECO:0000269|PubMed:19394296};
Peripheral membrane protein {ECO:0000303|PubMed:19394296}. Note=Shows no preferential localization to either the nucleus or the cytoplasm (By similarity). Shuttles between the nucleus and the cytoplasm in a CRM1-dependent manner (PubMed:16461360). Localizes predominantly at the endoplasmic reticulum membrane as a membrane-spanning protein;
whereas may be only marginally localized on the cytosolic side of the ER membrane as a peripheral membrane (PubMed:19394296, PubMed:25190803). {ECO:0000250|UniProtKB:O35426, ECO:0000269|PubMed:16461360, ECO:0000269|PubMed:19394296, ECO:0000269|PubMed:25190803}.;
[Isoform 2]: Nucleus {ECO:0000269|PubMed:16461360, ECO:0000269|PubMed:19394296, ECO:0000269|PubMed:20348923, ECO:0000269|PubMed:20955178}. Cytoplasm {ECO:0000250|UniProtKB:O35426}. Note=Localizes predominantly in the nucleus. Colocalizes in the nucleus with SIRT1. Translocates into the nucleus in a PIK3R-, ER stress-induced- and/or insulin-dependent manner (By similarity). {ECO:0000250|UniProtKB:O35426}.;
[X-box-binding protein 1, cytoplasmic form]: Cytoplasm {ECO:0000269|PubMed:25239945}. Nucleus {ECO:0000269|PubMed:25239945}. Note=Localizes in the cytoplasm and nucleus after HM13/SPP-mediated intramembranaire proteolytic cleavage of isoform 1 (PubMed:25239945). {ECO:0000269|PubMed:25239945}.
Mouse PG classificationNA
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