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Mol. Cell. Biol., Jun 1995, 3179-3186, Vol 15, No. 6
DD Duncan, A Stupakoff, SM Hedrick, KB Marcu and G Siu
The CD4 promoter plays an important role in the developmental control of
CD4 transcription. In this report, we show that the minimal CD4 promoter
has four factor binding sites, each of which is required for full function.
Using biochemical and mutagenesis analyses, we determined that multiple
nuclear factors bind to these independent sites. We determined that an
initiator-like sequence present at the cap site and an Ets consensus
sequence are required for full promoter function. We also demonstrate that
the Myc-associated zinc finger protein (MAZ) appears to be the predominant
factor binding to one of these sites. This last site closely resembles the
ME1a1 G3AG4AG3 motif previously shown to be a critical element in the P2
promoter of the c- myc gene. We therefore believe that the MAZ
transcription factor is also likely to play an important role in the
control of developmental expression of the CD4 gene.
Copyright © 1995, American Society for Microbiology
A Myc-associated zinc finger protein binding site is one of four important functional regions in the CD4 promoter
Department of Microbiology, Columbia University, College of Physicians and Surgeons, New York, New York 10032, USA.
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