Cloning and characterization of a novel member of the human ATF/CREB family: ATF2 deletion, a potential regulator of the human DNA polymerase beta promoter.

Chyan YJ, Rawson TY, Wilson SH
Gene (2003), Volume 312, Page 117
PubMed entry


The solitary cAMP response element (CRE)1 in the human DNA polymerase ...
The solitary cAMP response element (CRE)1 in the human DNA polymerase beta (beta-pol) core promoter plays a key role in both basal expression and the DNA-alkylating agent response of the promoter. To further understand the role of the CRE in the regulation of this promoter, we searched for novel CRE-binding proteins by using a 32P-labeled beta-pol CRE oligodeoxynucleotide and a human cDNA expression library constructed in phage lambda. A total of fourteen phage clones were isolated, corresponding to various members of the CRE-binding protein family. One of these clones, termed ATF2 deletion (ATF2d), encodes a novel ATF2 isoform and was chosen for further characterization in this study. Relative to ATF2 mRNA, this clone contains an internal 97-nt deletion and a unique 3' region. The 97-nt deletion causes a frame shift, resulting in a ATF2-like polypeptide of approximately 60 kDa. ATF2d retains the bZIP domain of ATF2, lacks the N-terminal zinc-finger region, and includes novel characteristics in its N- and C-terminal regions.




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