# |
PMID |
Sentence |
1 |
9792714
|
Critical structural elements and multitarget protein interactions of the transcriptional activator AF-1 of hepatocyte nuclear factor 4.
|
2 |
9792714
|
Recently, we showed that the 24 N-terminal residues of HNF-4 function as an acidic transcriptional activator, termed AF-1 (Hadzopoulou-Cladaras, M., Kistanova, E., Evagelopoulou, C., Zeng, S. , Cladaras C., and Ladias, J.
|
3 |
9792714
|
We showed that the aromatic and bulky hydrophobic residues Tyr6, Tyr14, Phe19, Lys10, and Lys17 are essential for AF-1 function.
|
4 |
9792714
|
Positional changes of Tyr6 and Tyr14 reduced AF-1 activity, underscoring the importance of primary structure for this activator.
|
5 |
9792714
|
Our analysis also indicated that AF-1 is bipartite, consisting of two modules that synergize to activate transcription.
|
6 |
9792714
|
More important, AF-1 shares common structural motifs and molecular targets with the activators of the tumor suppressor protein p53 and NF-kappaB-p65, suggesting similar mechanisms of action.
|
7 |
9792714
|
Remarkably, AF-1 interacted specifically with multiple transcriptional targets, including the TATA-binding protein; the TATA-binding protein-associated factors TAFII31 and TAFII80; transcription factor IIB; transcription factor IIH-p62; and the coactivators cAMP-responsive element-binding protein-binding protein, ADA2, and PC4.
|
8 |
9792714
|
The interaction of AF-1 with proteins that regulate distinct steps of transcription may provide a mechanism for synergistic activation of gene expression by AF-1.
|
9 |
9792714
|
Critical structural elements and multitarget protein interactions of the transcriptional activator AF-1 of hepatocyte nuclear factor 4.
|
10 |
9792714
|
Recently, we showed that the 24 N-terminal residues of HNF-4 function as an acidic transcriptional activator, termed AF-1 (Hadzopoulou-Cladaras, M., Kistanova, E., Evagelopoulou, C., Zeng, S. , Cladaras C., and Ladias, J.
|
11 |
9792714
|
We showed that the aromatic and bulky hydrophobic residues Tyr6, Tyr14, Phe19, Lys10, and Lys17 are essential for AF-1 function.
|
12 |
9792714
|
Positional changes of Tyr6 and Tyr14 reduced AF-1 activity, underscoring the importance of primary structure for this activator.
|
13 |
9792714
|
Our analysis also indicated that AF-1 is bipartite, consisting of two modules that synergize to activate transcription.
|
14 |
9792714
|
More important, AF-1 shares common structural motifs and molecular targets with the activators of the tumor suppressor protein p53 and NF-kappaB-p65, suggesting similar mechanisms of action.
|
15 |
9792714
|
Remarkably, AF-1 interacted specifically with multiple transcriptional targets, including the TATA-binding protein; the TATA-binding protein-associated factors TAFII31 and TAFII80; transcription factor IIB; transcription factor IIH-p62; and the coactivators cAMP-responsive element-binding protein-binding protein, ADA2, and PC4.
|
16 |
9792714
|
The interaction of AF-1 with proteins that regulate distinct steps of transcription may provide a mechanism for synergistic activation of gene expression by AF-1.
|
17 |
9792714
|
Critical structural elements and multitarget protein interactions of the transcriptional activator AF-1 of hepatocyte nuclear factor 4.
|
18 |
9792714
|
Recently, we showed that the 24 N-terminal residues of HNF-4 function as an acidic transcriptional activator, termed AF-1 (Hadzopoulou-Cladaras, M., Kistanova, E., Evagelopoulou, C., Zeng, S. , Cladaras C., and Ladias, J.
|
19 |
9792714
|
We showed that the aromatic and bulky hydrophobic residues Tyr6, Tyr14, Phe19, Lys10, and Lys17 are essential for AF-1 function.
|
20 |
9792714
|
Positional changes of Tyr6 and Tyr14 reduced AF-1 activity, underscoring the importance of primary structure for this activator.
|
21 |
9792714
|
Our analysis also indicated that AF-1 is bipartite, consisting of two modules that synergize to activate transcription.
|
22 |
9792714
|
More important, AF-1 shares common structural motifs and molecular targets with the activators of the tumor suppressor protein p53 and NF-kappaB-p65, suggesting similar mechanisms of action.
|
23 |
9792714
|
Remarkably, AF-1 interacted specifically with multiple transcriptional targets, including the TATA-binding protein; the TATA-binding protein-associated factors TAFII31 and TAFII80; transcription factor IIB; transcription factor IIH-p62; and the coactivators cAMP-responsive element-binding protein-binding protein, ADA2, and PC4.
|
24 |
9792714
|
The interaction of AF-1 with proteins that regulate distinct steps of transcription may provide a mechanism for synergistic activation of gene expression by AF-1.
|
25 |
9792714
|
Critical structural elements and multitarget protein interactions of the transcriptional activator AF-1 of hepatocyte nuclear factor 4.
|
26 |
9792714
|
Recently, we showed that the 24 N-terminal residues of HNF-4 function as an acidic transcriptional activator, termed AF-1 (Hadzopoulou-Cladaras, M., Kistanova, E., Evagelopoulou, C., Zeng, S. , Cladaras C., and Ladias, J.
|
27 |
9792714
|
We showed that the aromatic and bulky hydrophobic residues Tyr6, Tyr14, Phe19, Lys10, and Lys17 are essential for AF-1 function.
|
28 |
9792714
|
Positional changes of Tyr6 and Tyr14 reduced AF-1 activity, underscoring the importance of primary structure for this activator.
|
29 |
9792714
|
Our analysis also indicated that AF-1 is bipartite, consisting of two modules that synergize to activate transcription.
|
30 |
9792714
|
More important, AF-1 shares common structural motifs and molecular targets with the activators of the tumor suppressor protein p53 and NF-kappaB-p65, suggesting similar mechanisms of action.
|
31 |
9792714
|
Remarkably, AF-1 interacted specifically with multiple transcriptional targets, including the TATA-binding protein; the TATA-binding protein-associated factors TAFII31 and TAFII80; transcription factor IIB; transcription factor IIH-p62; and the coactivators cAMP-responsive element-binding protein-binding protein, ADA2, and PC4.
|
32 |
9792714
|
The interaction of AF-1 with proteins that regulate distinct steps of transcription may provide a mechanism for synergistic activation of gene expression by AF-1.
|
33 |
9792714
|
Critical structural elements and multitarget protein interactions of the transcriptional activator AF-1 of hepatocyte nuclear factor 4.
|
34 |
9792714
|
Recently, we showed that the 24 N-terminal residues of HNF-4 function as an acidic transcriptional activator, termed AF-1 (Hadzopoulou-Cladaras, M., Kistanova, E., Evagelopoulou, C., Zeng, S. , Cladaras C., and Ladias, J.
|
35 |
9792714
|
We showed that the aromatic and bulky hydrophobic residues Tyr6, Tyr14, Phe19, Lys10, and Lys17 are essential for AF-1 function.
|
36 |
9792714
|
Positional changes of Tyr6 and Tyr14 reduced AF-1 activity, underscoring the importance of primary structure for this activator.
|
37 |
9792714
|
Our analysis also indicated that AF-1 is bipartite, consisting of two modules that synergize to activate transcription.
|
38 |
9792714
|
More important, AF-1 shares common structural motifs and molecular targets with the activators of the tumor suppressor protein p53 and NF-kappaB-p65, suggesting similar mechanisms of action.
|
39 |
9792714
|
Remarkably, AF-1 interacted specifically with multiple transcriptional targets, including the TATA-binding protein; the TATA-binding protein-associated factors TAFII31 and TAFII80; transcription factor IIB; transcription factor IIH-p62; and the coactivators cAMP-responsive element-binding protein-binding protein, ADA2, and PC4.
|
40 |
9792714
|
The interaction of AF-1 with proteins that regulate distinct steps of transcription may provide a mechanism for synergistic activation of gene expression by AF-1.
|
41 |
9792714
|
Critical structural elements and multitarget protein interactions of the transcriptional activator AF-1 of hepatocyte nuclear factor 4.
|
42 |
9792714
|
Recently, we showed that the 24 N-terminal residues of HNF-4 function as an acidic transcriptional activator, termed AF-1 (Hadzopoulou-Cladaras, M., Kistanova, E., Evagelopoulou, C., Zeng, S. , Cladaras C., and Ladias, J.
|
43 |
9792714
|
We showed that the aromatic and bulky hydrophobic residues Tyr6, Tyr14, Phe19, Lys10, and Lys17 are essential for AF-1 function.
|
44 |
9792714
|
Positional changes of Tyr6 and Tyr14 reduced AF-1 activity, underscoring the importance of primary structure for this activator.
|
45 |
9792714
|
Our analysis also indicated that AF-1 is bipartite, consisting of two modules that synergize to activate transcription.
|
46 |
9792714
|
More important, AF-1 shares common structural motifs and molecular targets with the activators of the tumor suppressor protein p53 and NF-kappaB-p65, suggesting similar mechanisms of action.
|
47 |
9792714
|
Remarkably, AF-1 interacted specifically with multiple transcriptional targets, including the TATA-binding protein; the TATA-binding protein-associated factors TAFII31 and TAFII80; transcription factor IIB; transcription factor IIH-p62; and the coactivators cAMP-responsive element-binding protein-binding protein, ADA2, and PC4.
|
48 |
9792714
|
The interaction of AF-1 with proteins that regulate distinct steps of transcription may provide a mechanism for synergistic activation of gene expression by AF-1.
|
49 |
9792714
|
Critical structural elements and multitarget protein interactions of the transcriptional activator AF-1 of hepatocyte nuclear factor 4.
|
50 |
9792714
|
Recently, we showed that the 24 N-terminal residues of HNF-4 function as an acidic transcriptional activator, termed AF-1 (Hadzopoulou-Cladaras, M., Kistanova, E., Evagelopoulou, C., Zeng, S. , Cladaras C., and Ladias, J.
|
51 |
9792714
|
We showed that the aromatic and bulky hydrophobic residues Tyr6, Tyr14, Phe19, Lys10, and Lys17 are essential for AF-1 function.
|
52 |
9792714
|
Positional changes of Tyr6 and Tyr14 reduced AF-1 activity, underscoring the importance of primary structure for this activator.
|
53 |
9792714
|
Our analysis also indicated that AF-1 is bipartite, consisting of two modules that synergize to activate transcription.
|
54 |
9792714
|
More important, AF-1 shares common structural motifs and molecular targets with the activators of the tumor suppressor protein p53 and NF-kappaB-p65, suggesting similar mechanisms of action.
|
55 |
9792714
|
Remarkably, AF-1 interacted specifically with multiple transcriptional targets, including the TATA-binding protein; the TATA-binding protein-associated factors TAFII31 and TAFII80; transcription factor IIB; transcription factor IIH-p62; and the coactivators cAMP-responsive element-binding protein-binding protein, ADA2, and PC4.
|
56 |
9792714
|
The interaction of AF-1 with proteins that regulate distinct steps of transcription may provide a mechanism for synergistic activation of gene expression by AF-1.
|
57 |
9792714
|
Critical structural elements and multitarget protein interactions of the transcriptional activator AF-1 of hepatocyte nuclear factor 4.
|
58 |
9792714
|
Recently, we showed that the 24 N-terminal residues of HNF-4 function as an acidic transcriptional activator, termed AF-1 (Hadzopoulou-Cladaras, M., Kistanova, E., Evagelopoulou, C., Zeng, S. , Cladaras C., and Ladias, J.
|
59 |
9792714
|
We showed that the aromatic and bulky hydrophobic residues Tyr6, Tyr14, Phe19, Lys10, and Lys17 are essential for AF-1 function.
|
60 |
9792714
|
Positional changes of Tyr6 and Tyr14 reduced AF-1 activity, underscoring the importance of primary structure for this activator.
|
61 |
9792714
|
Our analysis also indicated that AF-1 is bipartite, consisting of two modules that synergize to activate transcription.
|
62 |
9792714
|
More important, AF-1 shares common structural motifs and molecular targets with the activators of the tumor suppressor protein p53 and NF-kappaB-p65, suggesting similar mechanisms of action.
|
63 |
9792714
|
Remarkably, AF-1 interacted specifically with multiple transcriptional targets, including the TATA-binding protein; the TATA-binding protein-associated factors TAFII31 and TAFII80; transcription factor IIB; transcription factor IIH-p62; and the coactivators cAMP-responsive element-binding protein-binding protein, ADA2, and PC4.
|
64 |
9792714
|
The interaction of AF-1 with proteins that regulate distinct steps of transcription may provide a mechanism for synergistic activation of gene expression by AF-1.
|
65 |
10187842
|
In addition, they are subject to phosphorylation by insulin, resulting in the activation of PPARalpha, while inhibiting PPARgamma under certain conditions.
|
66 |
10187842
|
However, it was hitherto unclear whether the stimulatory effect of insulin on PPARalpha was direct and by which mechanism it occurs.
|
67 |
10187842
|
We now demonstrate that amino acids 1-92 of hPPARalpha contain an activation function (AF)-1-like domain, which is further activated by insulin through a pathway involving the mitogen-activated protein kinases p42 and p44.
|
68 |
10187842
|
Further analysis of the amino-terminal region of PPARalpha revealed that the insulin-induced trans-activation occurs through the phosphorylation of two mitogen-activated protein kinase sites at positions 12 and 21, both of which are conserved across evolution.
|
69 |
10187842
|
The characterization of a strong AF-1 region in PPARalpha, stimulating transcription one-fourth as strongly as the viral protein VP16, is compatible with the marked basal transcriptional activity of this isoform in transfection experiments.
|
70 |
10187842
|
However, it is intriguing that the activity of this AF-1 region is modulated by the phosphorylation of two serine residues, both of which must be phosphorylated in order to activate transcription.
|
71 |
10187842
|
Although the molecular details involved in the phosphorylation-dependent enhancement of the transcriptional activity of PPARalpha remain to be elucidated, we demonstrate that the effect of insulin on the AF-1 region of PPARalpha can be mimicked by the addition of triiodothyronine receptor beta1, a strong binder of corepressor proteins.
|
72 |
10187842
|
In addition, a triiodothyronine receptor beta1 mutant deficient in interacting with corepressors is unable to activate PPARalpha.
|
73 |
10187842
|
These observations suggest that the AF-1 region of PPARalpha is partially silenced by corepressor proteins, which might interact in a phosphorylation-dependent manner.
|
74 |
10187842
|
In addition, they are subject to phosphorylation by insulin, resulting in the activation of PPARalpha, while inhibiting PPARgamma under certain conditions.
|
75 |
10187842
|
However, it was hitherto unclear whether the stimulatory effect of insulin on PPARalpha was direct and by which mechanism it occurs.
|
76 |
10187842
|
We now demonstrate that amino acids 1-92 of hPPARalpha contain an activation function (AF)-1-like domain, which is further activated by insulin through a pathway involving the mitogen-activated protein kinases p42 and p44.
|
77 |
10187842
|
Further analysis of the amino-terminal region of PPARalpha revealed that the insulin-induced trans-activation occurs through the phosphorylation of two mitogen-activated protein kinase sites at positions 12 and 21, both of which are conserved across evolution.
|
78 |
10187842
|
The characterization of a strong AF-1 region in PPARalpha, stimulating transcription one-fourth as strongly as the viral protein VP16, is compatible with the marked basal transcriptional activity of this isoform in transfection experiments.
|
79 |
10187842
|
However, it is intriguing that the activity of this AF-1 region is modulated by the phosphorylation of two serine residues, both of which must be phosphorylated in order to activate transcription.
|
80 |
10187842
|
Although the molecular details involved in the phosphorylation-dependent enhancement of the transcriptional activity of PPARalpha remain to be elucidated, we demonstrate that the effect of insulin on the AF-1 region of PPARalpha can be mimicked by the addition of triiodothyronine receptor beta1, a strong binder of corepressor proteins.
|
81 |
10187842
|
In addition, a triiodothyronine receptor beta1 mutant deficient in interacting with corepressors is unable to activate PPARalpha.
|
82 |
10187842
|
These observations suggest that the AF-1 region of PPARalpha is partially silenced by corepressor proteins, which might interact in a phosphorylation-dependent manner.
|
83 |
10187842
|
In addition, they are subject to phosphorylation by insulin, resulting in the activation of PPARalpha, while inhibiting PPARgamma under certain conditions.
|
84 |
10187842
|
However, it was hitherto unclear whether the stimulatory effect of insulin on PPARalpha was direct and by which mechanism it occurs.
|
85 |
10187842
|
We now demonstrate that amino acids 1-92 of hPPARalpha contain an activation function (AF)-1-like domain, which is further activated by insulin through a pathway involving the mitogen-activated protein kinases p42 and p44.
|
86 |
10187842
|
Further analysis of the amino-terminal region of PPARalpha revealed that the insulin-induced trans-activation occurs through the phosphorylation of two mitogen-activated protein kinase sites at positions 12 and 21, both of which are conserved across evolution.
|
87 |
10187842
|
The characterization of a strong AF-1 region in PPARalpha, stimulating transcription one-fourth as strongly as the viral protein VP16, is compatible with the marked basal transcriptional activity of this isoform in transfection experiments.
|
88 |
10187842
|
However, it is intriguing that the activity of this AF-1 region is modulated by the phosphorylation of two serine residues, both of which must be phosphorylated in order to activate transcription.
|
89 |
10187842
|
Although the molecular details involved in the phosphorylation-dependent enhancement of the transcriptional activity of PPARalpha remain to be elucidated, we demonstrate that the effect of insulin on the AF-1 region of PPARalpha can be mimicked by the addition of triiodothyronine receptor beta1, a strong binder of corepressor proteins.
|
90 |
10187842
|
In addition, a triiodothyronine receptor beta1 mutant deficient in interacting with corepressors is unable to activate PPARalpha.
|
91 |
10187842
|
These observations suggest that the AF-1 region of PPARalpha is partially silenced by corepressor proteins, which might interact in a phosphorylation-dependent manner.
|
92 |
10187842
|
In addition, they are subject to phosphorylation by insulin, resulting in the activation of PPARalpha, while inhibiting PPARgamma under certain conditions.
|
93 |
10187842
|
However, it was hitherto unclear whether the stimulatory effect of insulin on PPARalpha was direct and by which mechanism it occurs.
|
94 |
10187842
|
We now demonstrate that amino acids 1-92 of hPPARalpha contain an activation function (AF)-1-like domain, which is further activated by insulin through a pathway involving the mitogen-activated protein kinases p42 and p44.
|
95 |
10187842
|
Further analysis of the amino-terminal region of PPARalpha revealed that the insulin-induced trans-activation occurs through the phosphorylation of two mitogen-activated protein kinase sites at positions 12 and 21, both of which are conserved across evolution.
|
96 |
10187842
|
The characterization of a strong AF-1 region in PPARalpha, stimulating transcription one-fourth as strongly as the viral protein VP16, is compatible with the marked basal transcriptional activity of this isoform in transfection experiments.
|
97 |
10187842
|
However, it is intriguing that the activity of this AF-1 region is modulated by the phosphorylation of two serine residues, both of which must be phosphorylated in order to activate transcription.
|
98 |
10187842
|
Although the molecular details involved in the phosphorylation-dependent enhancement of the transcriptional activity of PPARalpha remain to be elucidated, we demonstrate that the effect of insulin on the AF-1 region of PPARalpha can be mimicked by the addition of triiodothyronine receptor beta1, a strong binder of corepressor proteins.
|
99 |
10187842
|
In addition, a triiodothyronine receptor beta1 mutant deficient in interacting with corepressors is unable to activate PPARalpha.
|
100 |
10187842
|
These observations suggest that the AF-1 region of PPARalpha is partially silenced by corepressor proteins, which might interact in a phosphorylation-dependent manner.
|
101 |
10187842
|
In addition, they are subject to phosphorylation by insulin, resulting in the activation of PPARalpha, while inhibiting PPARgamma under certain conditions.
|
102 |
10187842
|
However, it was hitherto unclear whether the stimulatory effect of insulin on PPARalpha was direct and by which mechanism it occurs.
|
103 |
10187842
|
We now demonstrate that amino acids 1-92 of hPPARalpha contain an activation function (AF)-1-like domain, which is further activated by insulin through a pathway involving the mitogen-activated protein kinases p42 and p44.
|
104 |
10187842
|
Further analysis of the amino-terminal region of PPARalpha revealed that the insulin-induced trans-activation occurs through the phosphorylation of two mitogen-activated protein kinase sites at positions 12 and 21, both of which are conserved across evolution.
|
105 |
10187842
|
The characterization of a strong AF-1 region in PPARalpha, stimulating transcription one-fourth as strongly as the viral protein VP16, is compatible with the marked basal transcriptional activity of this isoform in transfection experiments.
|
106 |
10187842
|
However, it is intriguing that the activity of this AF-1 region is modulated by the phosphorylation of two serine residues, both of which must be phosphorylated in order to activate transcription.
|
107 |
10187842
|
Although the molecular details involved in the phosphorylation-dependent enhancement of the transcriptional activity of PPARalpha remain to be elucidated, we demonstrate that the effect of insulin on the AF-1 region of PPARalpha can be mimicked by the addition of triiodothyronine receptor beta1, a strong binder of corepressor proteins.
|
108 |
10187842
|
In addition, a triiodothyronine receptor beta1 mutant deficient in interacting with corepressors is unable to activate PPARalpha.
|
109 |
10187842
|
These observations suggest that the AF-1 region of PPARalpha is partially silenced by corepressor proteins, which might interact in a phosphorylation-dependent manner.
|
110 |
11139388
|
Since PPARalpha exhibits a strong constitutive transactivating function contained within an N-terminal AF-1 region, it can be speculated that a different set of cofactors might interact with this region of PPARs.
|
111 |
11139388
|
Hence, the BFE represents the first known cofactor capable of activating the AF-1 domain of PPAR without requiring additional regions of this receptor.
|
112 |
11139388
|
Since PPARalpha exhibits a strong constitutive transactivating function contained within an N-terminal AF-1 region, it can be speculated that a different set of cofactors might interact with this region of PPARs.
|
113 |
11139388
|
Hence, the BFE represents the first known cofactor capable of activating the AF-1 domain of PPAR without requiring additional regions of this receptor.
|
114 |
12482846
|
Selective estrogen receptor modulators (SERMs) show differential effects upon ERalpha activation function 1 (AF-1).
|
115 |
12482846
|
Tamoxifen allows strong ERalpha AF-1 activity, whereas raloxifene allows less and ICI 182,780 (ICI) allows none.
|
116 |
12482846
|
Here, we show that blockade of corepressor histone de-acetylase (HDAC) activity reverses the differential inhibitory effect of SERMs upon AF-1 activity in MCF-7 cells.
|
117 |
12482846
|
This suggests that differential SERM repression of AF-1 involves HDAC-dependent corepressors.
|
118 |
12482846
|
An ERalpha mutation (537X) that increases N-CoR binding in the presence of all SERMs blocks AF-1 activity.
|
119 |
12482846
|
An ERalpha mutation (L379R) that decreases N-CoR binding increases AF-1 activity in the presence of ICI and raloxifene and reverses the effect of the 537X mutation.
|
120 |
12482846
|
The 537X and L379R mutations also alter the ligand preference of ERalpha action at AP-1 sites and C3 complement, an action that also involves AF-1.
|
121 |
12482846
|
Selective estrogen receptor modulators (SERMs) show differential effects upon ERalpha activation function 1 (AF-1).
|
122 |
12482846
|
Tamoxifen allows strong ERalpha AF-1 activity, whereas raloxifene allows less and ICI 182,780 (ICI) allows none.
|
123 |
12482846
|
Here, we show that blockade of corepressor histone de-acetylase (HDAC) activity reverses the differential inhibitory effect of SERMs upon AF-1 activity in MCF-7 cells.
|
124 |
12482846
|
This suggests that differential SERM repression of AF-1 involves HDAC-dependent corepressors.
|
125 |
12482846
|
An ERalpha mutation (537X) that increases N-CoR binding in the presence of all SERMs blocks AF-1 activity.
|
126 |
12482846
|
An ERalpha mutation (L379R) that decreases N-CoR binding increases AF-1 activity in the presence of ICI and raloxifene and reverses the effect of the 537X mutation.
|
127 |
12482846
|
The 537X and L379R mutations also alter the ligand preference of ERalpha action at AP-1 sites and C3 complement, an action that also involves AF-1.
|
128 |
12482846
|
Selective estrogen receptor modulators (SERMs) show differential effects upon ERalpha activation function 1 (AF-1).
|
129 |
12482846
|
Tamoxifen allows strong ERalpha AF-1 activity, whereas raloxifene allows less and ICI 182,780 (ICI) allows none.
|
130 |
12482846
|
Here, we show that blockade of corepressor histone de-acetylase (HDAC) activity reverses the differential inhibitory effect of SERMs upon AF-1 activity in MCF-7 cells.
|
131 |
12482846
|
This suggests that differential SERM repression of AF-1 involves HDAC-dependent corepressors.
|
132 |
12482846
|
An ERalpha mutation (537X) that increases N-CoR binding in the presence of all SERMs blocks AF-1 activity.
|
133 |
12482846
|
An ERalpha mutation (L379R) that decreases N-CoR binding increases AF-1 activity in the presence of ICI and raloxifene and reverses the effect of the 537X mutation.
|
134 |
12482846
|
The 537X and L379R mutations also alter the ligand preference of ERalpha action at AP-1 sites and C3 complement, an action that also involves AF-1.
|
135 |
12482846
|
Selective estrogen receptor modulators (SERMs) show differential effects upon ERalpha activation function 1 (AF-1).
|
136 |
12482846
|
Tamoxifen allows strong ERalpha AF-1 activity, whereas raloxifene allows less and ICI 182,780 (ICI) allows none.
|
137 |
12482846
|
Here, we show that blockade of corepressor histone de-acetylase (HDAC) activity reverses the differential inhibitory effect of SERMs upon AF-1 activity in MCF-7 cells.
|
138 |
12482846
|
This suggests that differential SERM repression of AF-1 involves HDAC-dependent corepressors.
|
139 |
12482846
|
An ERalpha mutation (537X) that increases N-CoR binding in the presence of all SERMs blocks AF-1 activity.
|
140 |
12482846
|
An ERalpha mutation (L379R) that decreases N-CoR binding increases AF-1 activity in the presence of ICI and raloxifene and reverses the effect of the 537X mutation.
|
141 |
12482846
|
The 537X and L379R mutations also alter the ligand preference of ERalpha action at AP-1 sites and C3 complement, an action that also involves AF-1.
|
142 |
12482846
|
Selective estrogen receptor modulators (SERMs) show differential effects upon ERalpha activation function 1 (AF-1).
|
143 |
12482846
|
Tamoxifen allows strong ERalpha AF-1 activity, whereas raloxifene allows less and ICI 182,780 (ICI) allows none.
|
144 |
12482846
|
Here, we show that blockade of corepressor histone de-acetylase (HDAC) activity reverses the differential inhibitory effect of SERMs upon AF-1 activity in MCF-7 cells.
|
145 |
12482846
|
This suggests that differential SERM repression of AF-1 involves HDAC-dependent corepressors.
|
146 |
12482846
|
An ERalpha mutation (537X) that increases N-CoR binding in the presence of all SERMs blocks AF-1 activity.
|
147 |
12482846
|
An ERalpha mutation (L379R) that decreases N-CoR binding increases AF-1 activity in the presence of ICI and raloxifene and reverses the effect of the 537X mutation.
|
148 |
12482846
|
The 537X and L379R mutations also alter the ligand preference of ERalpha action at AP-1 sites and C3 complement, an action that also involves AF-1.
|
149 |
12482846
|
Selective estrogen receptor modulators (SERMs) show differential effects upon ERalpha activation function 1 (AF-1).
|
150 |
12482846
|
Tamoxifen allows strong ERalpha AF-1 activity, whereas raloxifene allows less and ICI 182,780 (ICI) allows none.
|
151 |
12482846
|
Here, we show that blockade of corepressor histone de-acetylase (HDAC) activity reverses the differential inhibitory effect of SERMs upon AF-1 activity in MCF-7 cells.
|
152 |
12482846
|
This suggests that differential SERM repression of AF-1 involves HDAC-dependent corepressors.
|
153 |
12482846
|
An ERalpha mutation (537X) that increases N-CoR binding in the presence of all SERMs blocks AF-1 activity.
|
154 |
12482846
|
An ERalpha mutation (L379R) that decreases N-CoR binding increases AF-1 activity in the presence of ICI and raloxifene and reverses the effect of the 537X mutation.
|
155 |
12482846
|
The 537X and L379R mutations also alter the ligand preference of ERalpha action at AP-1 sites and C3 complement, an action that also involves AF-1.
|
156 |
12482846
|
Selective estrogen receptor modulators (SERMs) show differential effects upon ERalpha activation function 1 (AF-1).
|
157 |
12482846
|
Tamoxifen allows strong ERalpha AF-1 activity, whereas raloxifene allows less and ICI 182,780 (ICI) allows none.
|
158 |
12482846
|
Here, we show that blockade of corepressor histone de-acetylase (HDAC) activity reverses the differential inhibitory effect of SERMs upon AF-1 activity in MCF-7 cells.
|
159 |
12482846
|
This suggests that differential SERM repression of AF-1 involves HDAC-dependent corepressors.
|
160 |
12482846
|
An ERalpha mutation (537X) that increases N-CoR binding in the presence of all SERMs blocks AF-1 activity.
|
161 |
12482846
|
An ERalpha mutation (L379R) that decreases N-CoR binding increases AF-1 activity in the presence of ICI and raloxifene and reverses the effect of the 537X mutation.
|
162 |
12482846
|
The 537X and L379R mutations also alter the ligand preference of ERalpha action at AP-1 sites and C3 complement, an action that also involves AF-1.
|
163 |
12697672
|
Due to the presence of the activation function module AF-1, HNF4 alpha isoforms originating from the P1 promoter exhibit stronger transcriptional activities and recruit coactivators more efficiently than isoforms driven by the P2 promoter.
|
164 |
16154710
|
Role of insulin-sensitizing property of telmisartan, a commercially available angiotensin II type 1 receptor blocker in preventing the development of atrial fibrillation.
|
165 |
16154710
|
Several clinical trials suggest that the renin-angiotensin system (RAS) plays a pivotal role in the pathogenesis of insulin resistance.
|
166 |
16154710
|
Indeed, interruption of the RAS with angiotensin-converting enzyme inhibitors (ACEIs) or angiotensin II type 1 receptor blockers (ARBs) has been shown to prevent the onset of diabetes in hypertensive patients.
|
167 |
16154710
|
In this paper, we would like to propose the possible ways of clarifying to what extent the insulin-sensitizing effects of ARBs could account for the prevention of Af. (1) Does telmisartan reduce the development of Af in insulin resistant hypertensive patients?
|
168 |
17022998
|
Hepatocyte nuclear factor 4 alpha ligand binding and F domains mediate interaction and transcriptional synergy with the pancreatic islet LIM HD transcription factor Isl1.
|
169 |
17022998
|
The orphan nuclear receptor HNF4alpha and the LIM homeodomain factor Isl1 are co-expressed in pancreatic beta-cells and are required for the differentiation and function of these endocrine cells.
|
170 |
17022998
|
These transcriptional partners interact mainly through the HNF4alpha AF-1 module and the ligand binding domain, which contains the AF-2 module.
|
171 |
17022998
|
Here, we showed that Isl1 could enhance the HNF4alpha-mediated activation of transcription of the HNF1alpha, PPARalpha and insulin I promoters.
|
172 |
17022998
|
Isl1 interacted with the HNF4alpha AF-2 but also required the HNF4alpha carboxy-terminal F domain for optimal interaction and transcriptional synergy.
|
173 |
17022998
|
More specifically, we found that naturally occurring HNF4alpha isoforms, differing only in their F domain, exhibited different abilities to interact and synergize with Isl1, extending the crucial transcriptional modulatory role of the HNF4alpha F domain.
|
174 |
17022998
|
HNF4alpha interacted with both the homeodomain and the first LIM domain of Isl1.
|
175 |
17022998
|
We found that the transcriptional synergy between HNF4alpha and Isl1 involved an increase in HNF4alpha loading on promoter.
|
176 |
17022998
|
The effect was more pronounced on the rat insulin I promoter containing binding sites for both HNF4alpha and Isl1 than on the human HNF1alpha promoter lacking an Isl1 binding site.
|
177 |
17022998
|
Moreover, Isl1 could mediate the recruitment of the cofactor CLIM2 resulting in a further transcriptional enhancement of the HNF1alpha promoter activity.
|
178 |
18311053
|
Nuclear receptors have two regions for transactivation, a constitutive activation function (AF-1) and a ligand-dependent activation function (AF-2).
|
179 |
18311053
|
AF-1 and AF-2 seem to require interactions with coactivators for the activation function and both work synergistically to give full transactivation of nuclear receptors.
|
180 |
18311053
|
However, coactivators for AF-1 activity are poorly understood, whereas coactivators required for AF-2 activity have been well studied.
|
181 |
18311053
|
To understand the molecular mechanism of AF-1 in FXR, we isolated proteins associated with AF-1 by GST pull-down assay using the N-terminal region of FXR and nuclear extracts from HeLa cells.
|
182 |
18311053
|
Nuclear receptors have two regions for transactivation, a constitutive activation function (AF-1) and a ligand-dependent activation function (AF-2).
|
183 |
18311053
|
AF-1 and AF-2 seem to require interactions with coactivators for the activation function and both work synergistically to give full transactivation of nuclear receptors.
|
184 |
18311053
|
However, coactivators for AF-1 activity are poorly understood, whereas coactivators required for AF-2 activity have been well studied.
|
185 |
18311053
|
To understand the molecular mechanism of AF-1 in FXR, we isolated proteins associated with AF-1 by GST pull-down assay using the N-terminal region of FXR and nuclear extracts from HeLa cells.
|
186 |
18311053
|
Nuclear receptors have two regions for transactivation, a constitutive activation function (AF-1) and a ligand-dependent activation function (AF-2).
|
187 |
18311053
|
AF-1 and AF-2 seem to require interactions with coactivators for the activation function and both work synergistically to give full transactivation of nuclear receptors.
|
188 |
18311053
|
However, coactivators for AF-1 activity are poorly understood, whereas coactivators required for AF-2 activity have been well studied.
|
189 |
18311053
|
To understand the molecular mechanism of AF-1 in FXR, we isolated proteins associated with AF-1 by GST pull-down assay using the N-terminal region of FXR and nuclear extracts from HeLa cells.
|
190 |
18311053
|
Nuclear receptors have two regions for transactivation, a constitutive activation function (AF-1) and a ligand-dependent activation function (AF-2).
|
191 |
18311053
|
AF-1 and AF-2 seem to require interactions with coactivators for the activation function and both work synergistically to give full transactivation of nuclear receptors.
|
192 |
18311053
|
However, coactivators for AF-1 activity are poorly understood, whereas coactivators required for AF-2 activity have been well studied.
|
193 |
18311053
|
To understand the molecular mechanism of AF-1 in FXR, we isolated proteins associated with AF-1 by GST pull-down assay using the N-terminal region of FXR and nuclear extracts from HeLa cells.
|
194 |
18930112
|
Thus, NH-3 could modulate TR activity via effects on other coregulator interaction surfaces, such as activation function (AF-1) and corepressor binding sites.
|
195 |
18930112
|
Here, we find that NH-3 blocks TR-LBD interactions with coactivators and corepressors and also inhibits activities of AF-1 and AF-2 in transfections.
|
196 |
18930112
|
While NH-3 lacks detectable agonist activity at T(3)-activated genes in GC pituitary cells it nevertheless activates spot 14 (S14) in HTC liver cells with the latter effect accompanied by enhanced histone H4 acetylation and coactivator recruitment at the S14 promoter.
|
197 |
18930112
|
NH-3 effects vary; we observe transient recruitment of N-CoR to S14 in GC cells and dismissal and rebinding of N-CoR to the same promoter in HTC cells.
|
198 |
18930112
|
We propose that NH-3 will generally behave as an antagonist by blocking AF-1 and AF-2 but that complex effects on coregulator recruitment may result in partial/mixed agonist effects that are independent of blockade of T(3) binding in some contexts.
|
199 |
18930112
|
Thus, NH-3 could modulate TR activity via effects on other coregulator interaction surfaces, such as activation function (AF-1) and corepressor binding sites.
|
200 |
18930112
|
Here, we find that NH-3 blocks TR-LBD interactions with coactivators and corepressors and also inhibits activities of AF-1 and AF-2 in transfections.
|
201 |
18930112
|
While NH-3 lacks detectable agonist activity at T(3)-activated genes in GC pituitary cells it nevertheless activates spot 14 (S14) in HTC liver cells with the latter effect accompanied by enhanced histone H4 acetylation and coactivator recruitment at the S14 promoter.
|
202 |
18930112
|
NH-3 effects vary; we observe transient recruitment of N-CoR to S14 in GC cells and dismissal and rebinding of N-CoR to the same promoter in HTC cells.
|
203 |
18930112
|
We propose that NH-3 will generally behave as an antagonist by blocking AF-1 and AF-2 but that complex effects on coregulator recruitment may result in partial/mixed agonist effects that are independent of blockade of T(3) binding in some contexts.
|
204 |
18930112
|
Thus, NH-3 could modulate TR activity via effects on other coregulator interaction surfaces, such as activation function (AF-1) and corepressor binding sites.
|
205 |
18930112
|
Here, we find that NH-3 blocks TR-LBD interactions with coactivators and corepressors and also inhibits activities of AF-1 and AF-2 in transfections.
|
206 |
18930112
|
While NH-3 lacks detectable agonist activity at T(3)-activated genes in GC pituitary cells it nevertheless activates spot 14 (S14) in HTC liver cells with the latter effect accompanied by enhanced histone H4 acetylation and coactivator recruitment at the S14 promoter.
|
207 |
18930112
|
NH-3 effects vary; we observe transient recruitment of N-CoR to S14 in GC cells and dismissal and rebinding of N-CoR to the same promoter in HTC cells.
|
208 |
18930112
|
We propose that NH-3 will generally behave as an antagonist by blocking AF-1 and AF-2 but that complex effects on coregulator recruitment may result in partial/mixed agonist effects that are independent of blockade of T(3) binding in some contexts.
|
209 |
22974658
|
We propose that TR AF-1/PGC-1α contacts are needed for transition between activities of PGC-1α N-and C-terminal ADs in gene expression.
|
210 |
22974658
|
Our findings provide insights into possible roles for TR and NR AF-1 in gene expression.
|
211 |
22974658
|
We propose that TR AF-1/PGC-1α contacts are needed for transition between activities of PGC-1α N-and C-terminal ADs in gene expression.
|
212 |
22974658
|
Our findings provide insights into possible roles for TR and NR AF-1 in gene expression.
|
213 |
23903353
|
The beneficial metabolic actions of estrogen-based therapies are mainly mediated by estrogen receptor α (ERα), a nuclear receptor that regulates gene transcription through two activation functions (AFs): AF-1 and AF-2.
|