Identification and characterization of human PCDH10 gene promoter.
Gene
; 475(1): 49-56, 2011 Apr 01.
Article
in En
| MEDLINE
| ID: mdl-21237250
ABSTRACT
Recent studies have suggested roles for PCDH10 as a novel tumor suppressor gene. In our previous work, we located the core promoter of PCDH10 to a 462-bp segment of 5'-flanking region characterized by a high GC content. Here we further identified and characterized the promoter for PCDH10. Transient transfection of PC3 and LNCaP cells with a series of deleted promoter constructs indicated that the minimal promoter region was between nucleotides -144 and -99. This segment contained a CAAT box, a GT box, and a putative transcription factor binding site for AP-4. Mutational analysis identified that the CAAT box and GT box are necessary for promoter activity. Ectopic expression of NF-Ys increased reporter gene activity, whereas expression of a dominant-negative NF-YA decreased reporter gene activity. Co-transfection of Sp1/Sp3 expression plasmids enhanced reporter gene activity in a dose-dependent manner. Mithramycin A, an inhibitor of Sp-DNA interaction, reduced PCDH10 promoter activity. Electrophoretic mobility shift assays and chromatin immunoprecipitation demonstrated binding of transcription factors Sp1/Sp3 to the promoter region in vitro and in vivo. Our data show that Sp1/Sp3 and CBF/NF-Y transcription factors play a crucial role in the basal expression of the human PCDH10 gene.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Cadherins
/
Promoter Regions, Genetic
Type of study:
Diagnostic_studies
/
Prognostic_studies
Limits:
Humans
Language:
En
Journal:
Gene
Year:
2011
Document type:
Article