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Molecular Cloning of a Transcription Factor, AGP/EBP, That Belongs to Members of the C/EBP Family

Molecular and Cellular BiologyPublished 1 December 1990
Ching‐Jin Chang, Tung-Ti Chen, Huan‐Yao Lei, Ding‐Shinn Chen, Sheng-Chung Lee
Citations77
SJR quartileQ2
SJR score0.99
SNIP0.58

TL;DR

It is proposed that a family of C/EBP-like transcription factors exists and appears to be ubiquitously expressed in tissues like lung, spleen, kidney, heart, testis, and liver and cell lines like p388D1, 129P (hepatoma cell line of C3H/HeJ), FO (mouse myeloma), and L929.

Abstract

A C/EBP-like transcription factor, AGP/EBP, that binds to three distinct motifs in the 5'-flanking region of alpha 1-acid glycoprotein gene (AGP) has been identified. Here we report the cloning and properties of cDNA corresponding to mouse AGP/EBP. AGP/EBP and C/EBP share 87% amino acid sequence homology in the "leucine zipper" and its associated DNA-binding domains, while their sequences outside these domains and the sizes of their mRNAs are different. Unlike the limited expression of C/EBP in tissues and cells, AGP/EBP appears to be ubiquitously expressed in tissues like lung, spleen, kidney, heart, testis, and liver and cell lines like p388D1, 129P (hepatoma cell line of C3H/HeJ), FO (mouse myeloma), and L929. Antibody against cloned and expressed AGP/EBP which was raised in rabbits could recognize AGP/EBP from nuclear extract of a number of cells and tissues. On the basis of our findings about the structural relationship and the similarity of motif recognition, we propose that a family of C/EBP-like transcription factors exists.

Keywords

MedicineBiochemistry, Genetics and Molecular Biology