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Proliferating cell nuclear antigen (Pcna) as a direct downstream target gene of Hoxc8.

Abstract：

:Hoxc8 is a member of Hox family transcription factors that play crucial roles in spatiotemporal body patterning during embryogenesis. Hox proteins contain a conserved 61 amino acid homeodomain, which is responsible for recognition and binding of the proteins onto Hox-specific DNA binding motifs and regulates expression of their target genes. Previously, using proteome analysis, we identified Proliferating cell nuclear antigen (Pcna) as one of the putative target genes of Hoxc8. Here, we asked whether Hoxc8 regulates Pcna expression by directly binding to the regulatory sequence of Pcna. In mouse embryos at embryonic day 11.5, the expression pattern of Pcna was similar to that of Hoxc8 along the anteroposterior body axis. Moreover, Pcna transcript levels as well as cell proliferation rate were increased by overexpression of Hoxc8 in C3H10T1/2 mouse embryonic fibroblast cells. Characterization of 2.3kb genomic sequence upstream of Pcna coding region revealed that the upstream sequence contains several Hox core binding sequences and one Hox-Pbx binding sequence. Direct binding of Hoxc8 proteins to the Pcna regulatory sequence was verified by chromatin immunoprecipitation assay. Taken together, our data suggest that Pcna is a direct downstream target of Hoxc8.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Min H,Lee JY,Bok J,Chung HJ,Kim MH

doi

10.1016/j.bbrc.2010.01.059

subject

Has Abstract

pub_date

2010-02-19 00:00:00

pages

543-7

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(10)00108-7

journal_volume

392

pub_type

杂志文章

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