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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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A new member of the leucine zipper class of proteins that binds to the HLA DR alpha promoter.

Several mutants derived from transformed human B cell lines are defective in expressing major histocompatibility complex (MHC) class II genes. The failure to express a class II gene in at least one such mutant line has been mapped to the MHC class II X box, a conserved transcriptional element in the promoter region. A complementary DNA encoding a DNA-binding protein (human X box binding protein, hXBP-1) whose target is the human DR alpha X box and the 3' flanking region has now been cloned. This complementary DNA encoded a protein with structural similarities to the c-jun proto-oncogene product, and its target sequence was closely related to the palindromic target sequence of c-jun. Mutation of the hXBP-1 DNA target sequence decreased DR alpha promoter activity in vivo. These studies suggest that the hXBP-1 protein acts as a transcription factor in B cells.[1]

References

  1. A new member of the leucine zipper class of proteins that binds to the HLA DR alpha promoter. Liou, H.C., Boothby, M.R., Finn, P.W., Davidon, R., Nabavi, N., Zeleznik-Le, N.J., Ting, J.P., Glimcher, L.H. Science (1990) [Pubmed]
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