scholarly journals Lung cancer-associated JmjC domain protein mdig suppresses formation of tri-methyl lysine 9 of histone H3

Cell Cycle ◽  
2009 ◽  
Vol 8 (13) ◽  
pp. 2101-2109 ◽  
Author(s):  
Yongju Lu ◽  
Kevin Beezhold ◽  
Qingshan Chang ◽  
Yadong Zhang ◽  
Yon Rojanasakul ◽  
...  
2007 ◽  
Vol 6 (2) ◽  
pp. 542-551 ◽  
Author(s):  
Chie Suzuki ◽  
Koji Takahashi ◽  
Satoshi Hayama ◽  
Nobuhisa Ishikawa ◽  
Tatsuya Kato ◽  
...  

2013 ◽  
Vol 25 (11) ◽  
pp. 4725-4736 ◽  
Author(s):  
T. Li ◽  
X. Chen ◽  
X. Zhong ◽  
Y. Zhao ◽  
X. Liu ◽  
...  

2013 ◽  
Vol 43 (5) ◽  
pp. 1467-1480 ◽  
Author(s):  
XIAOHUI CHEN ◽  
NING SONG ◽  
KEITARO MATSUMOTO ◽  
ATSUSHI NANASHIMA ◽  
TAKESHI NAGAYASU ◽  
...  

2008 ◽  
Vol 28 (24) ◽  
pp. 7451-7464 ◽  
Author(s):  
Christos Polytarchou ◽  
Raymond Pfau ◽  
Maria Hatziapostolou ◽  
Philip N. Tsichlis

ABSTRACT The histone H3 demethylase Ndy1/KDM2B protects cells from replicative senescence. Changes in the metabolism of reactive oxygen species (ROS) are important for establishing senescence, suggesting that Ndy1 may play a role in redox regulation. Here we show that Ndy1 protects from H2O2-induced apoptosis and G2/M arrest and inhibits ROS-mediated signaling and DNA damage, while knockdown of Ndy1 has the opposite effects. Consistent with these observations, whereas Ndy1 overexpression promotes H2O2 detoxification, Ndy1 knockdown inhibits it. Ndy1 promotes the expression of genes encoding the antioxidant enzymes aminoadipic semialdehyde synthase (Aass), NAD(P)H quinone oxidoreductase-1 (Nqo1), peroxiredoxin-4 (Prdx4), and serine peptidase inhibitor b1b (Serpinb1b) and represses the expression of interleukin-19. At least two of these genes (Nqo1 and Prdx4) are regulated directly by Ndy1, which binds to specific sites within their promoters and demethylates promoter-associated histone H3 dimethylated at K36 and histone H3 trimethylated at K4. Simultaneous knockdown of Aass, Nqo1, Prdx4, and Serpinb1b in Ndy1-expressing cells to levels equivalent to those detected in control cells was sufficient to suppress the Ndy1 redox phenotype.


2018 ◽  
Vol Volume 10 ◽  
pp. 3245-3254 ◽  
Author(s):  
Ke Xu ◽  
Bin Liu ◽  
Yegang Ma ◽  
Baojin Xu ◽  
Xiaojing Xing

2010 ◽  
Vol 24 (10) ◽  
pp. 986-991 ◽  
Author(s):  
I. R. Searle ◽  
O. Pontes ◽  
C. W. Melnyk ◽  
L. M. Smith ◽  
D. C. Baulcombe

2010 ◽  
Vol 30 (13) ◽  
pp. 3286-3298 ◽  
Author(s):  
Klaus Fortschegger ◽  
Petra de Graaf ◽  
Nikolay S. Outchkourov ◽  
Frederik M. A. van Schaik ◽  
H. T. Marc Timmers ◽  
...  

ABSTRACT Mutations in PHF8 are associated with X-linked mental retardation and cleft lip/cleft palate. PHF8 contains a plant homeodomain (PHD) in its N terminus and is a member of a family of JmjC domain-containing proteins. While PHDs can act as methyl lysine recognition motifs, JmjC domains can catalyze lysine demethylation. Here, we show that PHF8 is a histone demethylase that removes repressive histone H3 dimethyl lysine 9 marks. Our biochemical analysis revealed specific association of the PHF8 PHD with histone H3 trimethylated at lysine 4 (H3K4me3). Chromatin immunoprecipitation followed by high-throughput sequencing indicated that PHF8 is enriched at the transcription start sites of many active or poised genes, mirroring the presence of RNA polymerase II (RNAPII) and of H3K4me3-bearing nucleosomes. We show that PHF8 can act as a transcriptional coactivator and that its activation function largely depends on binding of the PHD to H3K4me3. Furthermore, we present evidence for direct interaction of PHF8 with the C-terminal domain of RNAPII. Importantly, a PHF8 disease mutant was defective in demethylation and in coactivation. This is the first demonstration of a chromatin-modifying enzyme that is globally recruited to promoters through its association with H3K4me3 and RNAPII.


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