scholarly journals Regulation of cell type specific expression of a putative protein kinase C (pkcA) in Dictyostelium discoideum

2017 ◽  
Vol 145 ◽  
pp. S140-S141
Author(s):  
Umachandran Shalini ◽  
Wasima Mohamed ◽  
Ramamurthy Baskar
1988 ◽  
Vol 263 (10) ◽  
pp. 4523-4526 ◽  
Author(s):  
H Hidaka ◽  
T Tanaka ◽  
K Onoda ◽  
M Hagiwara ◽  
M Watanabe ◽  
...  

Virology ◽  
1999 ◽  
Vol 257 (1) ◽  
pp. 138-155 ◽  
Author(s):  
Silke Carl ◽  
A.John Iafrate ◽  
Sabine M. Lang ◽  
Christiane Stahl-Hennig ◽  
Eva M. Kuhn ◽  
...  

1993 ◽  
Vol 264 (4) ◽  
pp. H1300-H1306 ◽  
Author(s):  
Y. Shimamoto ◽  
H. Shimamoto ◽  
C. Y. Kwan ◽  
E. E. Daniel

We investigated effects of three kinds of putative protein kinase C (PKC) inhibitors, calphostin C, 1-(5-isoquinolinesulfonyl)-2-methylpiperazine (H-7), and stauro-sporine, on aortic muscle contractions induced by KCl, phenylephrine, 12-O-tetradecanoylphorbol-13-acetate (TPA), and phorbol 12, 13-dibutyrate (PDBu). Calphostin C noncompetitively inhibited TPA-induced contractions in a concentration-dependent manner. At 10(-6) M, calphostin C completely abolished responses to TPA and also effectively inhibited PDBu-induced contractions. Such a concentration of calphostin C had no effect on KCl-induced contractions but decreased the maximal tension of phenylephrine-induced response curve by 35.3 +/- 6.6% H-7 (10(-5) M had little effect on TPA-induced contraction but significantly inhibited contractile responses to phenylephrine and KCl. Staurosporine (10(-8) M, 3 x 10(-8) M) inhibited contractile responses to KCl, phenylephrine, and TPA. We suggest that staurosporine and H-7, which are known to act on the catalytic domain of PKC carrying high degree of sequence homology with other protein kinases, are relatively nonselective for PKC. On the other hand, calphostin C acting on the regulatory domain of PKC, which is distinct from other protein kinases, may serve as a relatively more selective PKC inhibitor.


2007 ◽  
Vol 86 (4) ◽  
pp. 243-248 ◽  
Author(s):  
Alan J. Stewart ◽  
Kevin Morgan ◽  
Colin Farquharson ◽  
Robert P. Millar

2008 ◽  
Vol 135 (1) ◽  
pp. 115-124 ◽  
Author(s):  
R.V. Chowda-Reddy ◽  
Fidelis Achenjang ◽  
Christian Felton ◽  
Marie T. Etarock ◽  
Marie-Therese Anangfac ◽  
...  

2004 ◽  
Vol 382 (1) ◽  
pp. 33-41 ◽  
Author(s):  
Huimin JIANG ◽  
Kai FU ◽  
Glen K. ANDREWS

Post-translational modification of MTF-1 (metal-response-element-binding transcription factor-1) was suggested to play a role in its metalloregulatory functions. In the present study, pulse labelling and two-dimensional electrophoresis–Western blotting were used to demonstrate that, although MTF-1 is highly modified in vivo, its phosphorylation level does not rapidly change in response to metals, nor does its overall modification pattern. Recombinant MTF-1 was found to serve as an in vitro substrate for casein kinase II, c-Jun N-terminal kinase and protein kinase C, but inhibition of these kinases in vivo did not significantly change the modification pattern of MTF-1. Northern blotting revealed that inhibitors of casein kinase II and c-Jun N-terminal kinase severely attenuate the metal-induced transcription of the native chromatin-packaged metallothionein-I and zinc transporter-1 genes, whereas protein kinase C inhibitors exerted gene- and cell-type-specific effects on the metal regulation and basal expression of these two genes. A chromatin immunoprecipitation assay was used to demonstrate that none of these inhibitors prevent the metal-dependent recruitment of MTF-1 to the MT-I promoter. In brief, results of the present study suggest that protein kinases may not alter the phosphorylation state of MTF-1 during the rapid-response phase to metals, nor do they regulate the metal-dependent formation of a stable MTF-1–chromatin complex. Instead, protein kinases may exert their interdependent effects on metal-induced gene expression by acting on cofactors that interact with MTF-1.


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