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PMID |
Sentence |
1 |
1654859
|
Protein phosphatase-1 and -2A, kinase FA, and casein kinase II in skeletal muscle of streptozotocin diabetic rats.
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2 |
1654859
|
Protein phosphatase-1 (PP-1) and -2A (PP-2A), two regulatory subunits of PP-1, the glycogen-binding subunit G and inhibitor-2 (I-2), kinase FA, and casein kinase II (CK-II) were investigated in skeletal muscle of diabetic rats 2 days after streptozotocin injection.
|
3 |
1654859
|
FA and CK-II activate PP-1 in vitro and might be involved in the activation of PP-1 by insulin.
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4 |
1654859
|
Following muscle fractionation we found that (1) diabetes decreased both basal and trypsin-stimulated PP-1 activities; the decrease was more significant in the glycogen-bound and microsomal fractions than in the cytosol (cytosolic PP-1 decreased as specific activity but not as activity/g of muscle); also PP-2A was lower in diabetic cytosols; (2) less G was immunoprecipitated from diabetic glycogen-bound fractions compared to controls, while I-2 was not significantly changed; (3) diabetes decreased also FA (assayed as PP-1 activator) and CK-II (assayed using a synthetic peptide as substrate); (4) diabetes did not have any effect on phosphorylase (a + b) activity in the glycogen-bound fraction.
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5 |
1654859
|
Altogether the data show that acute diabetes decreased PP-1, one of its regulatory subunits and two potentially physiological regulators of PP-1, in addition to PP-2A.
|
6 |
1654859
|
Protein phosphatase-1 and -2A, kinase FA, and casein kinase II in skeletal muscle of streptozotocin diabetic rats.
|
7 |
1654859
|
Protein phosphatase-1 (PP-1) and -2A (PP-2A), two regulatory subunits of PP-1, the glycogen-binding subunit G and inhibitor-2 (I-2), kinase FA, and casein kinase II (CK-II) were investigated in skeletal muscle of diabetic rats 2 days after streptozotocin injection.
|
8 |
1654859
|
FA and CK-II activate PP-1 in vitro and might be involved in the activation of PP-1 by insulin.
|
9 |
1654859
|
Following muscle fractionation we found that (1) diabetes decreased both basal and trypsin-stimulated PP-1 activities; the decrease was more significant in the glycogen-bound and microsomal fractions than in the cytosol (cytosolic PP-1 decreased as specific activity but not as activity/g of muscle); also PP-2A was lower in diabetic cytosols; (2) less G was immunoprecipitated from diabetic glycogen-bound fractions compared to controls, while I-2 was not significantly changed; (3) diabetes decreased also FA (assayed as PP-1 activator) and CK-II (assayed using a synthetic peptide as substrate); (4) diabetes did not have any effect on phosphorylase (a + b) activity in the glycogen-bound fraction.
|
10 |
1654859
|
Altogether the data show that acute diabetes decreased PP-1, one of its regulatory subunits and two potentially physiological regulators of PP-1, in addition to PP-2A.
|
11 |
1654859
|
Protein phosphatase-1 and -2A, kinase FA, and casein kinase II in skeletal muscle of streptozotocin diabetic rats.
|
12 |
1654859
|
Protein phosphatase-1 (PP-1) and -2A (PP-2A), two regulatory subunits of PP-1, the glycogen-binding subunit G and inhibitor-2 (I-2), kinase FA, and casein kinase II (CK-II) were investigated in skeletal muscle of diabetic rats 2 days after streptozotocin injection.
|
13 |
1654859
|
FA and CK-II activate PP-1 in vitro and might be involved in the activation of PP-1 by insulin.
|
14 |
1654859
|
Following muscle fractionation we found that (1) diabetes decreased both basal and trypsin-stimulated PP-1 activities; the decrease was more significant in the glycogen-bound and microsomal fractions than in the cytosol (cytosolic PP-1 decreased as specific activity but not as activity/g of muscle); also PP-2A was lower in diabetic cytosols; (2) less G was immunoprecipitated from diabetic glycogen-bound fractions compared to controls, while I-2 was not significantly changed; (3) diabetes decreased also FA (assayed as PP-1 activator) and CK-II (assayed using a synthetic peptide as substrate); (4) diabetes did not have any effect on phosphorylase (a + b) activity in the glycogen-bound fraction.
|
15 |
1654859
|
Altogether the data show that acute diabetes decreased PP-1, one of its regulatory subunits and two potentially physiological regulators of PP-1, in addition to PP-2A.
|
16 |
1999482
|
Activation of skeletal muscle casein kinase II by insulin is not diminished in subjects with insulin resistance.
|
17 |
1999482
|
To identify the putative postreceptor lesion responsible for insulin resistance in Pima Indians, we investigated the influence of insulin on the activity of casein kinase II (CKII) in skeletal muscle of seven insulin-sensitive, four insulin-resistant, nondiabetic, and five insulin-resistant diabetic Pima Indians during a 2 h hyperinsulinemic, euglycemic clamp.
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18 |
1999482
|
Basal CKII activity was correlated with fasting plasma insulin concentrations, suggesting that the higher activity in resistant subjects resulted from insulin action.
|
19 |
1999482
|
Extracts of muscle obtained from all three groups either before or after insulin administration were treated with immobilized alkaline phosphatase, which reduced and equalized CKII activity.
|
20 |
1999482
|
These results suggest that insulin stimulates CKII activity in human skeletal muscle by a mechanism involving phosphorylation of either CKII or of an effector molecule, and support the idea that elevated basal activity in resistant subjects results from insulin action.
|
21 |
1999482
|
It appears that the ability of insulin to activate CKII in skeletal muscle is not impaired in insulin-resistant Pima Indians, and that the biochemical lesion responsible for insulin resistance occurs either downstream from CKII or in a different pathway of insulin action.
|
22 |
1999482
|
Activation of skeletal muscle casein kinase II by insulin is not diminished in subjects with insulin resistance.
|
23 |
1999482
|
To identify the putative postreceptor lesion responsible for insulin resistance in Pima Indians, we investigated the influence of insulin on the activity of casein kinase II (CKII) in skeletal muscle of seven insulin-sensitive, four insulin-resistant, nondiabetic, and five insulin-resistant diabetic Pima Indians during a 2 h hyperinsulinemic, euglycemic clamp.
|
24 |
1999482
|
Basal CKII activity was correlated with fasting plasma insulin concentrations, suggesting that the higher activity in resistant subjects resulted from insulin action.
|
25 |
1999482
|
Extracts of muscle obtained from all three groups either before or after insulin administration were treated with immobilized alkaline phosphatase, which reduced and equalized CKII activity.
|
26 |
1999482
|
These results suggest that insulin stimulates CKII activity in human skeletal muscle by a mechanism involving phosphorylation of either CKII or of an effector molecule, and support the idea that elevated basal activity in resistant subjects results from insulin action.
|
27 |
1999482
|
It appears that the ability of insulin to activate CKII in skeletal muscle is not impaired in insulin-resistant Pima Indians, and that the biochemical lesion responsible for insulin resistance occurs either downstream from CKII or in a different pathway of insulin action.
|
28 |
1999482
|
Activation of skeletal muscle casein kinase II by insulin is not diminished in subjects with insulin resistance.
|
29 |
1999482
|
To identify the putative postreceptor lesion responsible for insulin resistance in Pima Indians, we investigated the influence of insulin on the activity of casein kinase II (CKII) in skeletal muscle of seven insulin-sensitive, four insulin-resistant, nondiabetic, and five insulin-resistant diabetic Pima Indians during a 2 h hyperinsulinemic, euglycemic clamp.
|
30 |
1999482
|
Basal CKII activity was correlated with fasting plasma insulin concentrations, suggesting that the higher activity in resistant subjects resulted from insulin action.
|
31 |
1999482
|
Extracts of muscle obtained from all three groups either before or after insulin administration were treated with immobilized alkaline phosphatase, which reduced and equalized CKII activity.
|
32 |
1999482
|
These results suggest that insulin stimulates CKII activity in human skeletal muscle by a mechanism involving phosphorylation of either CKII or of an effector molecule, and support the idea that elevated basal activity in resistant subjects results from insulin action.
|
33 |
1999482
|
It appears that the ability of insulin to activate CKII in skeletal muscle is not impaired in insulin-resistant Pima Indians, and that the biochemical lesion responsible for insulin resistance occurs either downstream from CKII or in a different pathway of insulin action.
|
34 |
1999482
|
Activation of skeletal muscle casein kinase II by insulin is not diminished in subjects with insulin resistance.
|
35 |
1999482
|
To identify the putative postreceptor lesion responsible for insulin resistance in Pima Indians, we investigated the influence of insulin on the activity of casein kinase II (CKII) in skeletal muscle of seven insulin-sensitive, four insulin-resistant, nondiabetic, and five insulin-resistant diabetic Pima Indians during a 2 h hyperinsulinemic, euglycemic clamp.
|
36 |
1999482
|
Basal CKII activity was correlated with fasting plasma insulin concentrations, suggesting that the higher activity in resistant subjects resulted from insulin action.
|
37 |
1999482
|
Extracts of muscle obtained from all three groups either before or after insulin administration were treated with immobilized alkaline phosphatase, which reduced and equalized CKII activity.
|
38 |
1999482
|
These results suggest that insulin stimulates CKII activity in human skeletal muscle by a mechanism involving phosphorylation of either CKII or of an effector molecule, and support the idea that elevated basal activity in resistant subjects results from insulin action.
|
39 |
1999482
|
It appears that the ability of insulin to activate CKII in skeletal muscle is not impaired in insulin-resistant Pima Indians, and that the biochemical lesion responsible for insulin resistance occurs either downstream from CKII or in a different pathway of insulin action.
|
40 |
1999482
|
Activation of skeletal muscle casein kinase II by insulin is not diminished in subjects with insulin resistance.
|
41 |
1999482
|
To identify the putative postreceptor lesion responsible for insulin resistance in Pima Indians, we investigated the influence of insulin on the activity of casein kinase II (CKII) in skeletal muscle of seven insulin-sensitive, four insulin-resistant, nondiabetic, and five insulin-resistant diabetic Pima Indians during a 2 h hyperinsulinemic, euglycemic clamp.
|
42 |
1999482
|
Basal CKII activity was correlated with fasting plasma insulin concentrations, suggesting that the higher activity in resistant subjects resulted from insulin action.
|
43 |
1999482
|
Extracts of muscle obtained from all three groups either before or after insulin administration were treated with immobilized alkaline phosphatase, which reduced and equalized CKII activity.
|
44 |
1999482
|
These results suggest that insulin stimulates CKII activity in human skeletal muscle by a mechanism involving phosphorylation of either CKII or of an effector molecule, and support the idea that elevated basal activity in resistant subjects results from insulin action.
|
45 |
1999482
|
It appears that the ability of insulin to activate CKII in skeletal muscle is not impaired in insulin-resistant Pima Indians, and that the biochemical lesion responsible for insulin resistance occurs either downstream from CKII or in a different pathway of insulin action.
|
46 |
3883988
|
Effect of starvation, diabetes and insulin on the casein kinase 2 from rat liver cytosol.
|
47 |
3883988
|
Administration of insulin to control rats did not alter this parameter, but increased the Km for casein of casein kinase 2 in diabetic rats.
|
48 |
3883988
|
The effect of diabetes on casein kinase 2 persisted after partial purification of the enzyme by glycerol-density-gradient centrifugation and affected also its activity on other protein substrates such as phosvitin, high-mobility-group protein 14 and glycogen synthase.
|
49 |
3883988
|
Effect of starvation, diabetes and insulin on the casein kinase 2 from rat liver cytosol.
|
50 |
3883988
|
Administration of insulin to control rats did not alter this parameter, but increased the Km for casein of casein kinase 2 in diabetic rats.
|
51 |
3883988
|
The effect of diabetes on casein kinase 2 persisted after partial purification of the enzyme by glycerol-density-gradient centrifugation and affected also its activity on other protein substrates such as phosvitin, high-mobility-group protein 14 and glycogen synthase.
|
52 |
3883988
|
Effect of starvation, diabetes and insulin on the casein kinase 2 from rat liver cytosol.
|
53 |
3883988
|
Administration of insulin to control rats did not alter this parameter, but increased the Km for casein of casein kinase 2 in diabetic rats.
|
54 |
3883988
|
The effect of diabetes on casein kinase 2 persisted after partial purification of the enzyme by glycerol-density-gradient centrifugation and affected also its activity on other protein substrates such as phosvitin, high-mobility-group protein 14 and glycogen synthase.
|
55 |
9169593
|
Insulin regulation of mitogen-activated protein kinase kinase (MEK), mitogen-activated protein kinase and casein kinase in the cell nucleus: a possible role in the regulation of gene expression.
|
56 |
9169593
|
After insulin receptor activation, many cytoplasmic enzymes, including mitogen-activated protein (MAP) kinase, MAP kinase kinase (MEK) and casein kinase II (CKII) are activated, but exactly how insulin signalling progresses to the nucleus remains poorly understood.
|
57 |
9169593
|
In Chinese hamster ovary cells overexpressing human insulin receptors [CHO(Hirc)], MEK, CKII and the MAP kinases ERK I and ERK II can be detected by immunoblotting in the nucleus, as well as in the cytoplasm, in the unstimulated state.
|
58 |
9169593
|
Nuclear localization of MAP kinase is also observed in 3T3-F442A adipocytes, NIH-3T3 cells and Fao hepatoma cells, whereas MEK is found in the nucleus only in Fao and CHO cells.
|
59 |
9169593
|
Insulin treatment for 5-30 min induces a translocation of MEK from the cytoplasm to the nucleus, whereas the MAP kinases and CKII are not translocated into the nucleus in response to insulin during this period.
|
60 |
9169593
|
However, nuclear MAP kinase and CKII activities increase by 2-3-fold within 1-10 min after stimulation with insulin.
|
61 |
9169593
|
By using gel-shift assays, it has been shown that insulin also stimulates nuclear protein binding to an AP-1 site with kinetics similar to MEK translocation and MAP kinase and CKII activation.
|
62 |
9169593
|
Treatment of the extracts in vitro with protein phosphatase 2A or treatment of the intact cells with 5, 6-dichloro-1-beta-d-ribofuranosylbenzimidazole, a cell-permeable inhibitor of CKII, almost completely blocks the insulin-induced DNA-binding activity, whereas incubation of cells with a MEK inhibitor produces only a slight decrease.
|
63 |
9169593
|
The latter is true of CKII, which seems to regulate the binding of nuclear proteins to the AP-1 site, possibly by phosphorylation of AP-1 transcription factors.
|
64 |
9169593
|
Insulin regulation of mitogen-activated protein kinase kinase (MEK), mitogen-activated protein kinase and casein kinase in the cell nucleus: a possible role in the regulation of gene expression.
|
65 |
9169593
|
After insulin receptor activation, many cytoplasmic enzymes, including mitogen-activated protein (MAP) kinase, MAP kinase kinase (MEK) and casein kinase II (CKII) are activated, but exactly how insulin signalling progresses to the nucleus remains poorly understood.
|
66 |
9169593
|
In Chinese hamster ovary cells overexpressing human insulin receptors [CHO(Hirc)], MEK, CKII and the MAP kinases ERK I and ERK II can be detected by immunoblotting in the nucleus, as well as in the cytoplasm, in the unstimulated state.
|
67 |
9169593
|
Nuclear localization of MAP kinase is also observed in 3T3-F442A adipocytes, NIH-3T3 cells and Fao hepatoma cells, whereas MEK is found in the nucleus only in Fao and CHO cells.
|
68 |
9169593
|
Insulin treatment for 5-30 min induces a translocation of MEK from the cytoplasm to the nucleus, whereas the MAP kinases and CKII are not translocated into the nucleus in response to insulin during this period.
|
69 |
9169593
|
However, nuclear MAP kinase and CKII activities increase by 2-3-fold within 1-10 min after stimulation with insulin.
|
70 |
9169593
|
By using gel-shift assays, it has been shown that insulin also stimulates nuclear protein binding to an AP-1 site with kinetics similar to MEK translocation and MAP kinase and CKII activation.
|
71 |
9169593
|
Treatment of the extracts in vitro with protein phosphatase 2A or treatment of the intact cells with 5, 6-dichloro-1-beta-d-ribofuranosylbenzimidazole, a cell-permeable inhibitor of CKII, almost completely blocks the insulin-induced DNA-binding activity, whereas incubation of cells with a MEK inhibitor produces only a slight decrease.
|
72 |
9169593
|
The latter is true of CKII, which seems to regulate the binding of nuclear proteins to the AP-1 site, possibly by phosphorylation of AP-1 transcription factors.
|
73 |
9169593
|
Insulin regulation of mitogen-activated protein kinase kinase (MEK), mitogen-activated protein kinase and casein kinase in the cell nucleus: a possible role in the regulation of gene expression.
|
74 |
9169593
|
After insulin receptor activation, many cytoplasmic enzymes, including mitogen-activated protein (MAP) kinase, MAP kinase kinase (MEK) and casein kinase II (CKII) are activated, but exactly how insulin signalling progresses to the nucleus remains poorly understood.
|
75 |
9169593
|
In Chinese hamster ovary cells overexpressing human insulin receptors [CHO(Hirc)], MEK, CKII and the MAP kinases ERK I and ERK II can be detected by immunoblotting in the nucleus, as well as in the cytoplasm, in the unstimulated state.
|
76 |
9169593
|
Nuclear localization of MAP kinase is also observed in 3T3-F442A adipocytes, NIH-3T3 cells and Fao hepatoma cells, whereas MEK is found in the nucleus only in Fao and CHO cells.
|
77 |
9169593
|
Insulin treatment for 5-30 min induces a translocation of MEK from the cytoplasm to the nucleus, whereas the MAP kinases and CKII are not translocated into the nucleus in response to insulin during this period.
|
78 |
9169593
|
However, nuclear MAP kinase and CKII activities increase by 2-3-fold within 1-10 min after stimulation with insulin.
|
79 |
9169593
|
By using gel-shift assays, it has been shown that insulin also stimulates nuclear protein binding to an AP-1 site with kinetics similar to MEK translocation and MAP kinase and CKII activation.
|
80 |
9169593
|
Treatment of the extracts in vitro with protein phosphatase 2A or treatment of the intact cells with 5, 6-dichloro-1-beta-d-ribofuranosylbenzimidazole, a cell-permeable inhibitor of CKII, almost completely blocks the insulin-induced DNA-binding activity, whereas incubation of cells with a MEK inhibitor produces only a slight decrease.
|
81 |
9169593
|
The latter is true of CKII, which seems to regulate the binding of nuclear proteins to the AP-1 site, possibly by phosphorylation of AP-1 transcription factors.
|
82 |
9169593
|
Insulin regulation of mitogen-activated protein kinase kinase (MEK), mitogen-activated protein kinase and casein kinase in the cell nucleus: a possible role in the regulation of gene expression.
|
83 |
9169593
|
After insulin receptor activation, many cytoplasmic enzymes, including mitogen-activated protein (MAP) kinase, MAP kinase kinase (MEK) and casein kinase II (CKII) are activated, but exactly how insulin signalling progresses to the nucleus remains poorly understood.
|
84 |
9169593
|
In Chinese hamster ovary cells overexpressing human insulin receptors [CHO(Hirc)], MEK, CKII and the MAP kinases ERK I and ERK II can be detected by immunoblotting in the nucleus, as well as in the cytoplasm, in the unstimulated state.
|
85 |
9169593
|
Nuclear localization of MAP kinase is also observed in 3T3-F442A adipocytes, NIH-3T3 cells and Fao hepatoma cells, whereas MEK is found in the nucleus only in Fao and CHO cells.
|
86 |
9169593
|
Insulin treatment for 5-30 min induces a translocation of MEK from the cytoplasm to the nucleus, whereas the MAP kinases and CKII are not translocated into the nucleus in response to insulin during this period.
|
87 |
9169593
|
However, nuclear MAP kinase and CKII activities increase by 2-3-fold within 1-10 min after stimulation with insulin.
|
88 |
9169593
|
By using gel-shift assays, it has been shown that insulin also stimulates nuclear protein binding to an AP-1 site with kinetics similar to MEK translocation and MAP kinase and CKII activation.
|
89 |
9169593
|
Treatment of the extracts in vitro with protein phosphatase 2A or treatment of the intact cells with 5, 6-dichloro-1-beta-d-ribofuranosylbenzimidazole, a cell-permeable inhibitor of CKII, almost completely blocks the insulin-induced DNA-binding activity, whereas incubation of cells with a MEK inhibitor produces only a slight decrease.
|
90 |
9169593
|
The latter is true of CKII, which seems to regulate the binding of nuclear proteins to the AP-1 site, possibly by phosphorylation of AP-1 transcription factors.
|
91 |
9169593
|
Insulin regulation of mitogen-activated protein kinase kinase (MEK), mitogen-activated protein kinase and casein kinase in the cell nucleus: a possible role in the regulation of gene expression.
|
92 |
9169593
|
After insulin receptor activation, many cytoplasmic enzymes, including mitogen-activated protein (MAP) kinase, MAP kinase kinase (MEK) and casein kinase II (CKII) are activated, but exactly how insulin signalling progresses to the nucleus remains poorly understood.
|
93 |
9169593
|
In Chinese hamster ovary cells overexpressing human insulin receptors [CHO(Hirc)], MEK, CKII and the MAP kinases ERK I and ERK II can be detected by immunoblotting in the nucleus, as well as in the cytoplasm, in the unstimulated state.
|
94 |
9169593
|
Nuclear localization of MAP kinase is also observed in 3T3-F442A adipocytes, NIH-3T3 cells and Fao hepatoma cells, whereas MEK is found in the nucleus only in Fao and CHO cells.
|
95 |
9169593
|
Insulin treatment for 5-30 min induces a translocation of MEK from the cytoplasm to the nucleus, whereas the MAP kinases and CKII are not translocated into the nucleus in response to insulin during this period.
|
96 |
9169593
|
However, nuclear MAP kinase and CKII activities increase by 2-3-fold within 1-10 min after stimulation with insulin.
|
97 |
9169593
|
By using gel-shift assays, it has been shown that insulin also stimulates nuclear protein binding to an AP-1 site with kinetics similar to MEK translocation and MAP kinase and CKII activation.
|
98 |
9169593
|
Treatment of the extracts in vitro with protein phosphatase 2A or treatment of the intact cells with 5, 6-dichloro-1-beta-d-ribofuranosylbenzimidazole, a cell-permeable inhibitor of CKII, almost completely blocks the insulin-induced DNA-binding activity, whereas incubation of cells with a MEK inhibitor produces only a slight decrease.
|
99 |
9169593
|
The latter is true of CKII, which seems to regulate the binding of nuclear proteins to the AP-1 site, possibly by phosphorylation of AP-1 transcription factors.
|
100 |
9169593
|
Insulin regulation of mitogen-activated protein kinase kinase (MEK), mitogen-activated protein kinase and casein kinase in the cell nucleus: a possible role in the regulation of gene expression.
|
101 |
9169593
|
After insulin receptor activation, many cytoplasmic enzymes, including mitogen-activated protein (MAP) kinase, MAP kinase kinase (MEK) and casein kinase II (CKII) are activated, but exactly how insulin signalling progresses to the nucleus remains poorly understood.
|
102 |
9169593
|
In Chinese hamster ovary cells overexpressing human insulin receptors [CHO(Hirc)], MEK, CKII and the MAP kinases ERK I and ERK II can be detected by immunoblotting in the nucleus, as well as in the cytoplasm, in the unstimulated state.
|
103 |
9169593
|
Nuclear localization of MAP kinase is also observed in 3T3-F442A adipocytes, NIH-3T3 cells and Fao hepatoma cells, whereas MEK is found in the nucleus only in Fao and CHO cells.
|
104 |
9169593
|
Insulin treatment for 5-30 min induces a translocation of MEK from the cytoplasm to the nucleus, whereas the MAP kinases and CKII are not translocated into the nucleus in response to insulin during this period.
|
105 |
9169593
|
However, nuclear MAP kinase and CKII activities increase by 2-3-fold within 1-10 min after stimulation with insulin.
|
106 |
9169593
|
By using gel-shift assays, it has been shown that insulin also stimulates nuclear protein binding to an AP-1 site with kinetics similar to MEK translocation and MAP kinase and CKII activation.
|
107 |
9169593
|
Treatment of the extracts in vitro with protein phosphatase 2A or treatment of the intact cells with 5, 6-dichloro-1-beta-d-ribofuranosylbenzimidazole, a cell-permeable inhibitor of CKII, almost completely blocks the insulin-induced DNA-binding activity, whereas incubation of cells with a MEK inhibitor produces only a slight decrease.
|
108 |
9169593
|
The latter is true of CKII, which seems to regulate the binding of nuclear proteins to the AP-1 site, possibly by phosphorylation of AP-1 transcription factors.
|
109 |
9169593
|
Insulin regulation of mitogen-activated protein kinase kinase (MEK), mitogen-activated protein kinase and casein kinase in the cell nucleus: a possible role in the regulation of gene expression.
|
110 |
9169593
|
After insulin receptor activation, many cytoplasmic enzymes, including mitogen-activated protein (MAP) kinase, MAP kinase kinase (MEK) and casein kinase II (CKII) are activated, but exactly how insulin signalling progresses to the nucleus remains poorly understood.
|
111 |
9169593
|
In Chinese hamster ovary cells overexpressing human insulin receptors [CHO(Hirc)], MEK, CKII and the MAP kinases ERK I and ERK II can be detected by immunoblotting in the nucleus, as well as in the cytoplasm, in the unstimulated state.
|
112 |
9169593
|
Nuclear localization of MAP kinase is also observed in 3T3-F442A adipocytes, NIH-3T3 cells and Fao hepatoma cells, whereas MEK is found in the nucleus only in Fao and CHO cells.
|
113 |
9169593
|
Insulin treatment for 5-30 min induces a translocation of MEK from the cytoplasm to the nucleus, whereas the MAP kinases and CKII are not translocated into the nucleus in response to insulin during this period.
|
114 |
9169593
|
However, nuclear MAP kinase and CKII activities increase by 2-3-fold within 1-10 min after stimulation with insulin.
|
115 |
9169593
|
By using gel-shift assays, it has been shown that insulin also stimulates nuclear protein binding to an AP-1 site with kinetics similar to MEK translocation and MAP kinase and CKII activation.
|
116 |
9169593
|
Treatment of the extracts in vitro with protein phosphatase 2A or treatment of the intact cells with 5, 6-dichloro-1-beta-d-ribofuranosylbenzimidazole, a cell-permeable inhibitor of CKII, almost completely blocks the insulin-induced DNA-binding activity, whereas incubation of cells with a MEK inhibitor produces only a slight decrease.
|
117 |
9169593
|
The latter is true of CKII, which seems to regulate the binding of nuclear proteins to the AP-1 site, possibly by phosphorylation of AP-1 transcription factors.
|
118 |
9677319
|
Rad, Gem and Kir possess unique structural features in comparison with other Ras-like GTPases, including a C-terminal 31-residue extension that lacks typical prenylation motifs.
|
119 |
9677319
|
Here we show that Rad serves as a substrate for phosphorylation by CaMKII, cAMP-dependent protein kinase (PKA), protein kinase C (PKC) and casein kinase II (CKII) with stoichiometries in vitro of 0.2-1.3 mol of phosphate/mol of Rad.
|
120 |
9677319
|
By deletion and point mutation analysis we show that phosphorylation by CaMKII and PKA occurs on a single serine residue at position 273, whereas PKC and CKII phosphorylate multiple C-terminal serine residues, including Ser214, Ser257, Ser273, Ser290 and Ser299.
|
121 |
9677319
|
Rad, Gem and Kir possess unique structural features in comparison with other Ras-like GTPases, including a C-terminal 31-residue extension that lacks typical prenylation motifs.
|
122 |
9677319
|
Here we show that Rad serves as a substrate for phosphorylation by CaMKII, cAMP-dependent protein kinase (PKA), protein kinase C (PKC) and casein kinase II (CKII) with stoichiometries in vitro of 0.2-1.3 mol of phosphate/mol of Rad.
|
123 |
9677319
|
By deletion and point mutation analysis we show that phosphorylation by CaMKII and PKA occurs on a single serine residue at position 273, whereas PKC and CKII phosphorylate multiple C-terminal serine residues, including Ser214, Ser257, Ser273, Ser290 and Ser299.
|
124 |
10216953
|
Eukaryotic initiation factor eIF2B is a guanine nucleotide exchange protein involved in regulation of translation initiation.
|
125 |
10216953
|
Phosphorylation of the epsilon-subunit is thought to be important in insulin-mediated changes in eIF2B activity.
|
126 |
10216953
|
However, elucidation of insulin's action has proven elusive, primarily because eIF2B epsilon is a substrate in vitro for at least three different protein kinases.
|
127 |
10216953
|
Treating diabetic rats with insulin rapidly reduced eIF2B epsilon kinase activity below control values.
|
128 |
10216953
|
Based on the pattern of phosphorylation of the wildtype and two variant forms of eIF2B epsilon using casein kinase (CK)-I, CK-II, or GSK-3 as well as that observed with skeletal muscle extracts, we conclude that the predominant eIF2B epsilon kinase in psoas muscle is GSK-3.
|
129 |
10216953
|
Thus, insulin-mediated changes in eIF2B activity are likely to involve GSK-3.
|
130 |
12012019
|
The Frizzled-1/(beta(2))-adrenergic receptor chimera: pharmacological properties of a unique G protein-linked receptor.
|
131 |
12012019
|
Using a chimeric receptor composed of the exofacial and the transmembrane, ligand-binding domain of the beta(2)-adrenergic receptor (beta2AR) fused with the corresponding cytoplasmic domains of the rat Frizzled-1 receptor (Rfz1), we created a unique chimera between distant members of the superfamily of G protein-coupled receptors.
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132 |
12012019
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This unique chimera retains much of the pharmacological character of the native beta2AR, whereas the coupling can be ascribed to Rfz1 domains which operate via G alpha q and not G alpha s.
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133 |
12012019
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Only the protein kinase A inhibitor KT5720, but not inhibitors of protein kinase C, calcium/calmodulin-sensitive kinase-2, casein kinase-2, and Src, inhibited agonist-induced sequestration.
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134 |
16672224
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Casein kinase 2 Is activated and essential for Wnt/beta-catenin signaling.
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135 |
16672224
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Wnt/beta-catenin signaling is essential to early development.
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136 |
16672224
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Activation of Frizzled-1 by Wnts induces nuclear accumulation of beta-catenin and activation of Lef/Tcf-dependent gene expression.
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137 |
16672224
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Casein kinase 2 has been shown to affect Wnt/beta-catenin signaling.
|
138 |
16672224
|
Herein we show to the contrary that casein kinase 2 activity is rapidly and transiently increased in response to Wnt3a stimulation and is essential for Wnt/beta-catenin signaling.
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139 |
16672224
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Chemical inhibition of casein kinase 2 or suppression of its expression blocks Frizzled-1 activation of Lef/Tcf-sensitive gene expression.
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140 |
16672224
|
Expression of a constitutively active mutant of either Galpha(q) or Galpha(o) stimulates casein kinase 2 activation and Lef/Tcf-sensitive gene expression.
|
141 |
16672224
|
Thus, casein kinase 2 is shown to be regulated by Wnt3a and essential to stimulation of the Frizzled-1/beta-catenin/Lef-Tcf pathway.
|
142 |
16672224
|
Casein kinase 2 Is activated and essential for Wnt/beta-catenin signaling.
|
143 |
16672224
|
Wnt/beta-catenin signaling is essential to early development.
|
144 |
16672224
|
Activation of Frizzled-1 by Wnts induces nuclear accumulation of beta-catenin and activation of Lef/Tcf-dependent gene expression.
|
145 |
16672224
|
Casein kinase 2 has been shown to affect Wnt/beta-catenin signaling.
|
146 |
16672224
|
Herein we show to the contrary that casein kinase 2 activity is rapidly and transiently increased in response to Wnt3a stimulation and is essential for Wnt/beta-catenin signaling.
|
147 |
16672224
|
Chemical inhibition of casein kinase 2 or suppression of its expression blocks Frizzled-1 activation of Lef/Tcf-sensitive gene expression.
|
148 |
16672224
|
Expression of a constitutively active mutant of either Galpha(q) or Galpha(o) stimulates casein kinase 2 activation and Lef/Tcf-sensitive gene expression.
|
149 |
16672224
|
Thus, casein kinase 2 is shown to be regulated by Wnt3a and essential to stimulation of the Frizzled-1/beta-catenin/Lef-Tcf pathway.
|
150 |
16672224
|
Casein kinase 2 Is activated and essential for Wnt/beta-catenin signaling.
|
151 |
16672224
|
Wnt/beta-catenin signaling is essential to early development.
|
152 |
16672224
|
Activation of Frizzled-1 by Wnts induces nuclear accumulation of beta-catenin and activation of Lef/Tcf-dependent gene expression.
|
153 |
16672224
|
Casein kinase 2 has been shown to affect Wnt/beta-catenin signaling.
|
154 |
16672224
|
Herein we show to the contrary that casein kinase 2 activity is rapidly and transiently increased in response to Wnt3a stimulation and is essential for Wnt/beta-catenin signaling.
|
155 |
16672224
|
Chemical inhibition of casein kinase 2 or suppression of its expression blocks Frizzled-1 activation of Lef/Tcf-sensitive gene expression.
|
156 |
16672224
|
Expression of a constitutively active mutant of either Galpha(q) or Galpha(o) stimulates casein kinase 2 activation and Lef/Tcf-sensitive gene expression.
|
157 |
16672224
|
Thus, casein kinase 2 is shown to be regulated by Wnt3a and essential to stimulation of the Frizzled-1/beta-catenin/Lef-Tcf pathway.
|
158 |
16672224
|
Casein kinase 2 Is activated and essential for Wnt/beta-catenin signaling.
|
159 |
16672224
|
Wnt/beta-catenin signaling is essential to early development.
|
160 |
16672224
|
Activation of Frizzled-1 by Wnts induces nuclear accumulation of beta-catenin and activation of Lef/Tcf-dependent gene expression.
|
161 |
16672224
|
Casein kinase 2 has been shown to affect Wnt/beta-catenin signaling.
|
162 |
16672224
|
Herein we show to the contrary that casein kinase 2 activity is rapidly and transiently increased in response to Wnt3a stimulation and is essential for Wnt/beta-catenin signaling.
|
163 |
16672224
|
Chemical inhibition of casein kinase 2 or suppression of its expression blocks Frizzled-1 activation of Lef/Tcf-sensitive gene expression.
|
164 |
16672224
|
Expression of a constitutively active mutant of either Galpha(q) or Galpha(o) stimulates casein kinase 2 activation and Lef/Tcf-sensitive gene expression.
|
165 |
16672224
|
Thus, casein kinase 2 is shown to be regulated by Wnt3a and essential to stimulation of the Frizzled-1/beta-catenin/Lef-Tcf pathway.
|
166 |
16672224
|
Casein kinase 2 Is activated and essential for Wnt/beta-catenin signaling.
|
167 |
16672224
|
Wnt/beta-catenin signaling is essential to early development.
|
168 |
16672224
|
Activation of Frizzled-1 by Wnts induces nuclear accumulation of beta-catenin and activation of Lef/Tcf-dependent gene expression.
|
169 |
16672224
|
Casein kinase 2 has been shown to affect Wnt/beta-catenin signaling.
|
170 |
16672224
|
Herein we show to the contrary that casein kinase 2 activity is rapidly and transiently increased in response to Wnt3a stimulation and is essential for Wnt/beta-catenin signaling.
|
171 |
16672224
|
Chemical inhibition of casein kinase 2 or suppression of its expression blocks Frizzled-1 activation of Lef/Tcf-sensitive gene expression.
|
172 |
16672224
|
Expression of a constitutively active mutant of either Galpha(q) or Galpha(o) stimulates casein kinase 2 activation and Lef/Tcf-sensitive gene expression.
|
173 |
16672224
|
Thus, casein kinase 2 is shown to be regulated by Wnt3a and essential to stimulation of the Frizzled-1/beta-catenin/Lef-Tcf pathway.
|
174 |
16672224
|
Casein kinase 2 Is activated and essential for Wnt/beta-catenin signaling.
|
175 |
16672224
|
Wnt/beta-catenin signaling is essential to early development.
|
176 |
16672224
|
Activation of Frizzled-1 by Wnts induces nuclear accumulation of beta-catenin and activation of Lef/Tcf-dependent gene expression.
|
177 |
16672224
|
Casein kinase 2 has been shown to affect Wnt/beta-catenin signaling.
|
178 |
16672224
|
Herein we show to the contrary that casein kinase 2 activity is rapidly and transiently increased in response to Wnt3a stimulation and is essential for Wnt/beta-catenin signaling.
|
179 |
16672224
|
Chemical inhibition of casein kinase 2 or suppression of its expression blocks Frizzled-1 activation of Lef/Tcf-sensitive gene expression.
|
180 |
16672224
|
Expression of a constitutively active mutant of either Galpha(q) or Galpha(o) stimulates casein kinase 2 activation and Lef/Tcf-sensitive gene expression.
|
181 |
16672224
|
Thus, casein kinase 2 is shown to be regulated by Wnt3a and essential to stimulation of the Frizzled-1/beta-catenin/Lef-Tcf pathway.
|