Search Thermo Fisher Scientific
Search Thermo Fisher Scientific
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Immunogen sequence: MVVVAAAPN PADGTPKVLL LSGQPASAAG APAGQALPLM VPAQRGASPE AASGGLPQAR KRQRLTHLSP EEKALRRKLK NRVAAQTARD RKKARMSELE QQVVDLEEEN QKLLLENQLL REKTHGLVVE NQELRQRLGM DALVAEEEAE AKGNEVRPVA GSAESAAL
The X-box binding protein 1 (XBP1) gene, located on chromosome 22q12.1, codes for a critical transcription factor involved in the unfolded protein response (UPR). The gene encodes two protein isoforms: XBP1u (unspliced) and XBP1s (spliced). Under conditions of endoplasmic reticulum (ER) stress, IRE1 alpha senses the misfolded proteins and mediates the unconventional splicing of XBP1 mRNA, converting XBP1u to its active form, XBP1s. The protein product of XBP1s comprises a basic-region leucine zipper (bZIP) domain, essential for its function as a transcription factor. XBP1s regulates the expression of various genes involved in protein folding, secretion, and degradation, thus maintaining cellular homeostasis. It also plays pivotal roles in immune responses, lipid metabolism, and has been implicated in several diseases, including cancer and neurodegenerative disorders.
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Protein Aliases: Tax-responsive element-binding protein 5; tax-responsive element-binding protein 5 homolog; TREB-5; X-box-binding protein 1; XBP-1
Gene Aliases: D11Ertd39e; TREB-5; TREB5; XBP-1; XBP1; XBP2
UniProt ID: (Human) P17861, (Mouse) O35426
Entrez Gene ID: (Human) 7494, (Mouse) 22433
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