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Organization of human ACAT-2 gene and its cell-type-specific promoter activity.

Abstract：

:Acyl-CoA:cholesterol acyltransferase (ACAT) plays important roles in cellular cholesterol homeostasis. Two ACAT genes exist in mammals. We report here the genomic organization of human ACAT-2 gene and analysis of its promoter activity in various cell lines. The human ACAT-2 gene spans over 18 kb and contains 15 exons. Three transcription start sites and one poly(A) site are identified by the 5'/3'-RACE. In addition, the human ACAT-2 gene is linked to the insulin-like growth factor binding protein 6 (IGFBP-6) gene in a head-to-tail manner with a small intergenic region of about 1.2 kb. The 5'-flanking region of human ACAT-2 gene contains many potential cis-acting elements for multiple transcriptional regulatory factors but lacks TATA and CCAAT boxes. Using promoter-luciferase reporter assays, we demonstrate the transcriptional activity of ACAT-2 gene promoter is high in Caco-2 cells, especially after these cells become postconfluent and behave as intestinal enterocytes.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Song BL,Qi W,Yang XY,Chang CC,Zhu JQ,Chang TY,Li BL

doi

10.1006/bbrc.2001.4612

subject

Has Abstract

pub_date

2001-03-30 00:00:00

pages

580-8

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(01)94612-1

journal_volume

282

pub_type

杂志文章

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