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Molecular characterization of transcription factors that bind to the cAMP responsive region of the substance P precursor gene. cDNA cloning of a novel C/EBP-related factor.

Kageyama R., Sasai Y., Nakanishi S.

A cAMP response element (CRE) plays an important role in the cAMP-mediated gene regulation. Several factors that recognize a CRE have been characterized, and it has been shown that they need either covalent modification by protein kinase A or a cofactor such as the adenovirus Ela to function as an activator. In this study we show that the substance P precursor gene expression is regulated by protein kinase A and identify the CRE sequence in its promoter region. We find that a novel factor and ATF2 bind to the region containing the CRE of the substance P precursor gene. The sequence analysis indicates that the novel protein, designated CELF, has a significant homology to C/EBP gene family proteins in the carboxyl-terminal part containing the basic region and the leucine zipper motif. Ubiquitous expression of CELF suggests that this factor is utilized by various genes. Cell-free transcription analyses indicate that CELF is a constitutive transcriptional activator without apparent phosphorylation by protein kinase A. These results demonstrate that multiple factors are responsible for transcriptional control of the substance P precursor gene through the CRE region.

J. Biol. Chem. 266:15525-15531(1991) [PubMed] [Europe PMC]

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