Ae. Ballagi et al., ISOLATION AND CHARACTERIZATION OF THE MOUSE PDGF BETA-RECEPTOR PROMOTER, Biochemical and biophysical research communications, 210(1), 1995, pp. 165-173
The PDGF beta-receptor expression is tightly regulated during embryoni
c development and in several physiological and pathological situations
. To determine the regulatory mechanism of the receptor, a 1.9 kb 5' f
lanking genomic fragment of the mouse PDGF beta-receptor gene was clon
ed and analyzed by functional promoter assays. The fragment was shown
to exert promoter activity in the luciferase expression vector system
in mouse NIH 3T3 fibroblast and NB41 neuroblastoma cell lines as well
as rat ST15A cerebellar cell lines. Functional studies on deletion mut
ants revealed several putative regulatory sequences. The deletion muta
nts acted similarly in NB41 cells and in ST15A cells, both of neuronal
origin, but differently in the NIH 3T3 fibroblasts. No TATA box was f
ound in the analyzed promoter region, however, site directed mutagenes
is of a CCAAT motif, located 60 basepair upstream of the transcription
al start site, almost completely abolished the promoter activity in al
l cell types. (C) 1995 Academic Press, Inc.