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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Mol+Cell+Biol
2015 ; 35
(22
): 3841-53
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Spatial Interplay between Polycomb and Trithorax Complexes Controls
Transcriptional Activity in T Lymphocytes
#MMPMID26324324
Onodera A
; Tumes DJ
; Watanabe Y
; Hirahara K
; Kaneda A
; Sugiyama F
; Suzuki Y
; Nakayama T
Mol Cell Biol
2015[Nov]; 35
(22
): 3841-53
PMID26324324
show ga
Trithorax group (TrxG) and Polycomb group (PcG) proteins are two mutually
antagonistic chromatin modifying complexes, however, how they together mediate
transcriptional counter-regulation remains unknown. Genome-wide analysis revealed
that binding of Ezh2 and menin, central members of the PcG and TrxG complexes,
respectively, were reciprocally correlated. Moreover, we identified a
developmental change in the positioning of Ezh2 and menin in differentiated T
lymphocytes compared to embryonic stem cells. Ezh2-binding upstream and
menin-binding downstream of the transcription start site was frequently found at
genes with higher transcriptional levels, and Ezh2-binding downstream and
menin-binding upstream was found at genes with lower expression in T lymphocytes.
Interestingly, of the Ezh2 and menin cooccupied genes, those exhibiting occupancy
at the same position displayed greatly enhanced sensitivity to loss of Ezh2.
Finally, we also found that different combinations of Ezh2 and menin occupancy
were associated with expression of specific functional gene groups important for
T cell development. Therefore, spatial cooperative gene regulation by the PcG and
TrxG complexes may represent a novel mechanism regulating the transcriptional
identity of differentiated cells.