Promoter analysis and chromosomal mapping of human EBAG9 gene.

Abstract:

:The human EBAG9 was previously identified as an estrogen responsive gene using CpG-genomic binding site cloning (Watanate et al., (1998) Mol. Cell. Biol. 18: 442-449). Recently it was revealed that the EBAG9 is identical with RCAS1 which is a cancer cell surface antigen implicated in immune escape. Here, we isolated and analyzed the 5'-flanking region of human EBAG9 gene. We determined transcription initiation site, which has a homology with an initiator element YYCAYYYY, and found that TATA motif was absent. Deletion analysis of the 5'-flanking region using MCF-7 breast cancer cells indicated that the sequences -86 to -36 containing the ERE had the basal level of promoter activity and the upstream GC-rich region positively regulated the activity. EBAG9 promoter luciferase reporters containing the ERE could respond to estrogen, and electrophoretic mobility shift assay showed that ERalpha bound to the ERE. Moreover, fluorescent in situ hybridization analysis has shown that the human EBAG9 gene is located at chromosome 8q23 which is frequently amplified in tumors. These findings suggest that the human EBAG9 might be involved in carcinogenesis as an estrogen responsive gene.

authors

Ikeda K,Sato M,Tsutsumi O,Tsuchiya F,Tsuneizumi M,Emi M,Imoto I,Inazawa J,Muramatsu M,Inoue S

doi

10.1006/bbrc.2000.2920

subject

Has Abstract

pub_date

2000-07-05 00:00:00

pages

654-60

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(00)92920-6

journal_volume

273

pub_type

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