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. 1994 Aug;14(8):5023-31.
doi: 10.1128/mcb.14.8.5023-5031.1994.

Involvement of the transcription factor PU.1/Spi-1 in myeloid cell-restricted expression of an interferon-inducible gene encoding the human high-affinity Fc gamma receptor

C Perez  1 , E Coeffier, F Moreau-Gachelin, J Wietzerbin, P D Benech
Affiliations

Involvement of the transcription factor PU.1/Spi-1 in myeloid cell-restricted expression of an interferon-inducible gene encoding the human high-affinity Fc gamma receptor

C Perez et al. Mol Cell Biol. 1994 Aug.

Abstract

Induction by gamma interferon (IFN-gamma) of the gene encoding the human high-affinity Fc gamma receptor (Fc gamma R1) in myeloid cells requires an IFN-gamma response region (GRR) and a myeloid cell-activating transcription element (MATE). GRR and MATE interact with factors to form, respectively, an IFN-gamma-activating complex (GIRE-BP), depending on the phosphorylation of the 91-kDa protein (subunit of ISGF3), and a cell-type-specific complex (MATE-BP). Although GIRE-BP is detected in cells of different origins after IFN-gamma treatment, the presence of MATE-BP was found to be restricted to B- and myeloid cell lines. Sequence analysis of a cDNA encoding a polypeptide recognizing specifically the MATE motif led to the identification of this product as the proto-oncogene PU.1/Spi-1, a transcriptional activator expressed in myeloid and B cells. Expression of this factor in nonhematopoietic cells allowed IFN-gamma-induced expression of a reporter gene under control of the GRR and MATE sequences. The presence of these motifs in other gene promoters indicates that the binding of PU.1/Spi-1 and IFN regulatory proteins to their respective motifs could be part of a general mechanism leading to cell-type-restricted and IFN-induced gene expression.

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