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Cdx1 interacts physically with a subset of Hox proteins.

Abstract：

:Cdx and Hox gene families encode homeodomain-containing transcription factors involved in anterior-posterior vertebral patterning. Although Cdx proteins are direct transcriptional regulators of Hox gene expression, both Hox and Cdx proteins are known to interact with other homeodomain transcription factors, leading us to speculate that Cdx and Hox proteins may also interact physically. In testing this, we found that that Cdx1 is indeed capable of associating with a subset of Hox proteins. This interaction is localized to the homeodomain region of both classes of proteins, is reliant on specific arginine residues in helix I of the Hox homeodomain, and is further modulated by N-terminal Hox sequences. More promiscuous interactions were seen with Hox proteins expressed in vivo, suggestive of bridging factors or post-translational modifications. Finally, we demonstrate that this interaction modulates Cdx-Hox transcriptional activity on a Hox-responsive element. This study is the first example of Cdx-Hox protein interactions and suggests that such complexes may modulate Hox and/or Cdx function.

journal_name

Biochemistry

journal_title

Biochemistry

authors

Lafontaine CA,Grainger S,Hess BL,Béland M,Lohnes D

doi

10.1021/bi301241q

subject

Has Abstract

pub_date

2012-12-04 00:00:00

pages

9698-705

issue

48

eissn

0006-2960

issn

1520-4995

journal_volume

51

pub_type

杂志文章

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