High yield purification of JNK1β1 and activation by
The c-Jun N-terminal kinase (JNK) pathway forms part of the mitogen-activated protein kinase (MAPK) signaling pathways comprising a sequential three-tiered kinase cascade. Here, an upstream MAP3K (MEKK1) phosphorylates and activates a MAP2K (MKK4 and MKK7), which in turn phosphorylates and activates...
Ausführliche Beschreibung
Autor*in: |
Owen, Gavin R. [verfasserIn] Achilonu, Ikechukwu [verfasserIn] Dirr, Heini W. [verfasserIn] |
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Format: |
E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2012 |
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Schlagwörter: |
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Übergeordnetes Werk: |
Enthalten in: Protein expression and purification - Amsterdam [u.a.] : Elsevier, 1990, 87, Seite 87-99 |
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Übergeordnetes Werk: |
volume:87 ; pages:87-99 |
DOI / URN: |
10.1016/j.pep.2012.10.010 |
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Katalog-ID: |
ELV009906509 |
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245 | 1 | 0 | |a High yield purification of JNK1β1 and activation by |
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520 | |a The c-Jun N-terminal kinase (JNK) pathway forms part of the mitogen-activated protein kinase (MAPK) signaling pathways comprising a sequential three-tiered kinase cascade. Here, an upstream MAP3K (MEKK1) phosphorylates and activates a MAP2K (MKK4 and MKK7), which in turn phosphorylates and activates the MAPK, JNK. The C-terminal kinase domain of MEKK1 (MEKK-C) is constitutively active, while MKK4/7 and JNK are both activated by dual phosphorylation of S/Y, and T/Y residues within their activation loops, respectively. While improvements in the purification of large quantities of active JNKs have recently been made, inadequacies in their yield, purity, and the efficiency of their phosphorylation still exist. We describe a novel and robust method that further improves upon the purification of large yields of highly pure, phosphorylated JNK1β1, which is most suitable for biochemical and biophysical characterization. Codon harmonization of the JNK1β1 gene was used as a precautionary measure toward increasing the soluble overexpression of the kinase. While JNK1β1 and its substrate ATF2 were both purified to >99% purity as GST fusion proteins using GSH-agarose affinity chromatography and each cleaved from GST using thrombin, constitutively-active MEKK-C and inactive MKK4 were separately expressed in E. coli as thioredoxin-His6-tagged proteins and purified using urea refolding and Ni2+-IMAC, respectively. Activation of JNK1β1 was then achieved by successfully reconstituting the JNK MAPK activation cascade in vitro; MEKK-C was used to activate MKK4, which in turn was used to efficiently phosphorylate and activate large quantities of JNK1β1. Activated JNK1β1 was thereafter able to phosphorylate ATF2 with high catalytic efficiency. | ||
650 | 4 | |a c-Jun N-terminal kinase | |
650 | 4 | |a MAP kinases | |
650 | 4 | |a MAPK signaling cascade | |
650 | 4 | |a Protein phosphorylation | |
650 | 4 | |a Codon harmonization | |
700 | 1 | |a Achilonu, Ikechukwu |e verfasserin |4 aut | |
700 | 1 | |a Dirr, Heini W. |e verfasserin |4 aut | |
773 | 0 | 8 | |i Enthalten in |t Protein expression and purification |d Amsterdam [u.a.] : Elsevier, 1990 |g 87, Seite 87-99 |h Online-Ressource |w (DE-627)268128006 |w (DE-600)1471688-4 |w (DE-576)25948377X |7 nnns |
773 | 1 | 8 | |g volume:87 |g pages:87-99 |
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912 | |a GBV_ILN_2044 | ||
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912 | |a GBV_ILN_2049 | ||
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912 | |a GBV_ILN_4335 | ||
912 | |a GBV_ILN_4338 | ||
912 | |a GBV_ILN_4393 | ||
936 | b | k | |a 35.76 |j Aminosäuren |j Peptide |j Eiweiße |x Biochemie |q VZ |
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2012 |
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publishDate |
2012 |
allfields |
10.1016/j.pep.2012.10.010 doi (DE-627)ELV009906509 (ELSEVIER)S1046-5928(12)00299-9 DE-627 ger DE-627 rda eng 570 610 VZ 35.76 bkl Owen, Gavin R. verfasserin aut High yield purification of JNK1β1 and activation by 2012 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The c-Jun N-terminal kinase (JNK) pathway forms part of the mitogen-activated protein kinase (MAPK) signaling pathways comprising a sequential three-tiered kinase cascade. Here, an upstream MAP3K (MEKK1) phosphorylates and activates a MAP2K (MKK4 and MKK7), which in turn phosphorylates and activates the MAPK, JNK. The C-terminal kinase domain of MEKK1 (MEKK-C) is constitutively active, while MKK4/7 and JNK are both activated by dual phosphorylation of S/Y, and T/Y residues within their activation loops, respectively. While improvements in the purification of large quantities of active JNKs have recently been made, inadequacies in their yield, purity, and the efficiency of their phosphorylation still exist. We describe a novel and robust method that further improves upon the purification of large yields of highly pure, phosphorylated JNK1β1, which is most suitable for biochemical and biophysical characterization. Codon harmonization of the JNK1β1 gene was used as a precautionary measure toward increasing the soluble overexpression of the kinase. While JNK1β1 and its substrate ATF2 were both purified to >99% purity as GST fusion proteins using GSH-agarose affinity chromatography and each cleaved from GST using thrombin, constitutively-active MEKK-C and inactive MKK4 were separately expressed in E. coli as thioredoxin-His6-tagged proteins and purified using urea refolding and Ni2+-IMAC, respectively. Activation of JNK1β1 was then achieved by successfully reconstituting the JNK MAPK activation cascade in vitro; MEKK-C was used to activate MKK4, which in turn was used to efficiently phosphorylate and activate large quantities of JNK1β1. Activated JNK1β1 was thereafter able to phosphorylate ATF2 with high catalytic efficiency. c-Jun N-terminal kinase MAP kinases MAPK signaling cascade Protein phosphorylation Codon harmonization Achilonu, Ikechukwu verfasserin aut Dirr, Heini W. verfasserin aut Enthalten in Protein expression and purification Amsterdam [u.a.] : Elsevier, 1990 87, Seite 87-99 Online-Ressource (DE-627)268128006 (DE-600)1471688-4 (DE-576)25948377X nnns volume:87 pages:87-99 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.76 Aminosäuren Peptide Eiweiße Biochemie VZ AR 87 87-99 |
spelling |
10.1016/j.pep.2012.10.010 doi (DE-627)ELV009906509 (ELSEVIER)S1046-5928(12)00299-9 DE-627 ger DE-627 rda eng 570 610 VZ 35.76 bkl Owen, Gavin R. verfasserin aut High yield purification of JNK1β1 and activation by 2012 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The c-Jun N-terminal kinase (JNK) pathway forms part of the mitogen-activated protein kinase (MAPK) signaling pathways comprising a sequential three-tiered kinase cascade. Here, an upstream MAP3K (MEKK1) phosphorylates and activates a MAP2K (MKK4 and MKK7), which in turn phosphorylates and activates the MAPK, JNK. The C-terminal kinase domain of MEKK1 (MEKK-C) is constitutively active, while MKK4/7 and JNK are both activated by dual phosphorylation of S/Y, and T/Y residues within their activation loops, respectively. While improvements in the purification of large quantities of active JNKs have recently been made, inadequacies in their yield, purity, and the efficiency of their phosphorylation still exist. We describe a novel and robust method that further improves upon the purification of large yields of highly pure, phosphorylated JNK1β1, which is most suitable for biochemical and biophysical characterization. Codon harmonization of the JNK1β1 gene was used as a precautionary measure toward increasing the soluble overexpression of the kinase. While JNK1β1 and its substrate ATF2 were both purified to >99% purity as GST fusion proteins using GSH-agarose affinity chromatography and each cleaved from GST using thrombin, constitutively-active MEKK-C and inactive MKK4 were separately expressed in E. coli as thioredoxin-His6-tagged proteins and purified using urea refolding and Ni2+-IMAC, respectively. Activation of JNK1β1 was then achieved by successfully reconstituting the JNK MAPK activation cascade in vitro; MEKK-C was used to activate MKK4, which in turn was used to efficiently phosphorylate and activate large quantities of JNK1β1. Activated JNK1β1 was thereafter able to phosphorylate ATF2 with high catalytic efficiency. c-Jun N-terminal kinase MAP kinases MAPK signaling cascade Protein phosphorylation Codon harmonization Achilonu, Ikechukwu verfasserin aut Dirr, Heini W. verfasserin aut Enthalten in Protein expression and purification Amsterdam [u.a.] : Elsevier, 1990 87, Seite 87-99 Online-Ressource (DE-627)268128006 (DE-600)1471688-4 (DE-576)25948377X nnns volume:87 pages:87-99 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.76 Aminosäuren Peptide Eiweiße Biochemie VZ AR 87 87-99 |
allfields_unstemmed |
10.1016/j.pep.2012.10.010 doi (DE-627)ELV009906509 (ELSEVIER)S1046-5928(12)00299-9 DE-627 ger DE-627 rda eng 570 610 VZ 35.76 bkl Owen, Gavin R. verfasserin aut High yield purification of JNK1β1 and activation by 2012 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The c-Jun N-terminal kinase (JNK) pathway forms part of the mitogen-activated protein kinase (MAPK) signaling pathways comprising a sequential three-tiered kinase cascade. Here, an upstream MAP3K (MEKK1) phosphorylates and activates a MAP2K (MKK4 and MKK7), which in turn phosphorylates and activates the MAPK, JNK. The C-terminal kinase domain of MEKK1 (MEKK-C) is constitutively active, while MKK4/7 and JNK are both activated by dual phosphorylation of S/Y, and T/Y residues within their activation loops, respectively. While improvements in the purification of large quantities of active JNKs have recently been made, inadequacies in their yield, purity, and the efficiency of their phosphorylation still exist. We describe a novel and robust method that further improves upon the purification of large yields of highly pure, phosphorylated JNK1β1, which is most suitable for biochemical and biophysical characterization. Codon harmonization of the JNK1β1 gene was used as a precautionary measure toward increasing the soluble overexpression of the kinase. While JNK1β1 and its substrate ATF2 were both purified to >99% purity as GST fusion proteins using GSH-agarose affinity chromatography and each cleaved from GST using thrombin, constitutively-active MEKK-C and inactive MKK4 were separately expressed in E. coli as thioredoxin-His6-tagged proteins and purified using urea refolding and Ni2+-IMAC, respectively. Activation of JNK1β1 was then achieved by successfully reconstituting the JNK MAPK activation cascade in vitro; MEKK-C was used to activate MKK4, which in turn was used to efficiently phosphorylate and activate large quantities of JNK1β1. Activated JNK1β1 was thereafter able to phosphorylate ATF2 with high catalytic efficiency. c-Jun N-terminal kinase MAP kinases MAPK signaling cascade Protein phosphorylation Codon harmonization Achilonu, Ikechukwu verfasserin aut Dirr, Heini W. verfasserin aut Enthalten in Protein expression and purification Amsterdam [u.a.] : Elsevier, 1990 87, Seite 87-99 Online-Ressource (DE-627)268128006 (DE-600)1471688-4 (DE-576)25948377X nnns volume:87 pages:87-99 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.76 Aminosäuren Peptide Eiweiße Biochemie VZ AR 87 87-99 |
allfieldsGer |
10.1016/j.pep.2012.10.010 doi (DE-627)ELV009906509 (ELSEVIER)S1046-5928(12)00299-9 DE-627 ger DE-627 rda eng 570 610 VZ 35.76 bkl Owen, Gavin R. verfasserin aut High yield purification of JNK1β1 and activation by 2012 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The c-Jun N-terminal kinase (JNK) pathway forms part of the mitogen-activated protein kinase (MAPK) signaling pathways comprising a sequential three-tiered kinase cascade. Here, an upstream MAP3K (MEKK1) phosphorylates and activates a MAP2K (MKK4 and MKK7), which in turn phosphorylates and activates the MAPK, JNK. The C-terminal kinase domain of MEKK1 (MEKK-C) is constitutively active, while MKK4/7 and JNK are both activated by dual phosphorylation of S/Y, and T/Y residues within their activation loops, respectively. While improvements in the purification of large quantities of active JNKs have recently been made, inadequacies in their yield, purity, and the efficiency of their phosphorylation still exist. We describe a novel and robust method that further improves upon the purification of large yields of highly pure, phosphorylated JNK1β1, which is most suitable for biochemical and biophysical characterization. Codon harmonization of the JNK1β1 gene was used as a precautionary measure toward increasing the soluble overexpression of the kinase. While JNK1β1 and its substrate ATF2 were both purified to >99% purity as GST fusion proteins using GSH-agarose affinity chromatography and each cleaved from GST using thrombin, constitutively-active MEKK-C and inactive MKK4 were separately expressed in E. coli as thioredoxin-His6-tagged proteins and purified using urea refolding and Ni2+-IMAC, respectively. Activation of JNK1β1 was then achieved by successfully reconstituting the JNK MAPK activation cascade in vitro; MEKK-C was used to activate MKK4, which in turn was used to efficiently phosphorylate and activate large quantities of JNK1β1. Activated JNK1β1 was thereafter able to phosphorylate ATF2 with high catalytic efficiency. c-Jun N-terminal kinase MAP kinases MAPK signaling cascade Protein phosphorylation Codon harmonization Achilonu, Ikechukwu verfasserin aut Dirr, Heini W. verfasserin aut Enthalten in Protein expression and purification Amsterdam [u.a.] : Elsevier, 1990 87, Seite 87-99 Online-Ressource (DE-627)268128006 (DE-600)1471688-4 (DE-576)25948377X nnns volume:87 pages:87-99 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.76 Aminosäuren Peptide Eiweiße Biochemie VZ AR 87 87-99 |
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ddc 570 bkl 35.76 misc c-Jun N-terminal kinase misc MAP kinases misc MAPK signaling cascade misc Protein phosphorylation misc Codon harmonization |
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Elektronische Aufsätze Aufsätze Elektronische Ressource |
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Protein expression and purification |
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Protein expression and purification |
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title |
High yield purification of JNK1β1 and activation by |
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(DE-627)ELV009906509 (ELSEVIER)S1046-5928(12)00299-9 |
title_full |
High yield purification of JNK1β1 and activation by |
author_sort |
Owen, Gavin R. |
journal |
Protein expression and purification |
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Protein expression and purification |
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eng |
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500 - Science 600 - Technology |
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2012 |
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87 |
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Owen, Gavin R. Achilonu, Ikechukwu Dirr, Heini W. |
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87 |
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570 610 VZ 35.76 bkl |
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Elektronische Aufsätze |
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Owen, Gavin R. |
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10.1016/j.pep.2012.10.010 |
dewey-full |
570 610 |
author2-role |
verfasserin |
title_sort |
high yield purification of jnk1β1 and activation by |
title_auth |
High yield purification of JNK1β1 and activation by |
abstract |
The c-Jun N-terminal kinase (JNK) pathway forms part of the mitogen-activated protein kinase (MAPK) signaling pathways comprising a sequential three-tiered kinase cascade. Here, an upstream MAP3K (MEKK1) phosphorylates and activates a MAP2K (MKK4 and MKK7), which in turn phosphorylates and activates the MAPK, JNK. The C-terminal kinase domain of MEKK1 (MEKK-C) is constitutively active, while MKK4/7 and JNK are both activated by dual phosphorylation of S/Y, and T/Y residues within their activation loops, respectively. While improvements in the purification of large quantities of active JNKs have recently been made, inadequacies in their yield, purity, and the efficiency of their phosphorylation still exist. We describe a novel and robust method that further improves upon the purification of large yields of highly pure, phosphorylated JNK1β1, which is most suitable for biochemical and biophysical characterization. Codon harmonization of the JNK1β1 gene was used as a precautionary measure toward increasing the soluble overexpression of the kinase. While JNK1β1 and its substrate ATF2 were both purified to >99% purity as GST fusion proteins using GSH-agarose affinity chromatography and each cleaved from GST using thrombin, constitutively-active MEKK-C and inactive MKK4 were separately expressed in E. coli as thioredoxin-His6-tagged proteins and purified using urea refolding and Ni2+-IMAC, respectively. Activation of JNK1β1 was then achieved by successfully reconstituting the JNK MAPK activation cascade in vitro; MEKK-C was used to activate MKK4, which in turn was used to efficiently phosphorylate and activate large quantities of JNK1β1. Activated JNK1β1 was thereafter able to phosphorylate ATF2 with high catalytic efficiency. |
abstractGer |
The c-Jun N-terminal kinase (JNK) pathway forms part of the mitogen-activated protein kinase (MAPK) signaling pathways comprising a sequential three-tiered kinase cascade. Here, an upstream MAP3K (MEKK1) phosphorylates and activates a MAP2K (MKK4 and MKK7), which in turn phosphorylates and activates the MAPK, JNK. The C-terminal kinase domain of MEKK1 (MEKK-C) is constitutively active, while MKK4/7 and JNK are both activated by dual phosphorylation of S/Y, and T/Y residues within their activation loops, respectively. While improvements in the purification of large quantities of active JNKs have recently been made, inadequacies in their yield, purity, and the efficiency of their phosphorylation still exist. We describe a novel and robust method that further improves upon the purification of large yields of highly pure, phosphorylated JNK1β1, which is most suitable for biochemical and biophysical characterization. Codon harmonization of the JNK1β1 gene was used as a precautionary measure toward increasing the soluble overexpression of the kinase. While JNK1β1 and its substrate ATF2 were both purified to >99% purity as GST fusion proteins using GSH-agarose affinity chromatography and each cleaved from GST using thrombin, constitutively-active MEKK-C and inactive MKK4 were separately expressed in E. coli as thioredoxin-His6-tagged proteins and purified using urea refolding and Ni2+-IMAC, respectively. Activation of JNK1β1 was then achieved by successfully reconstituting the JNK MAPK activation cascade in vitro; MEKK-C was used to activate MKK4, which in turn was used to efficiently phosphorylate and activate large quantities of JNK1β1. Activated JNK1β1 was thereafter able to phosphorylate ATF2 with high catalytic efficiency. |
abstract_unstemmed |
The c-Jun N-terminal kinase (JNK) pathway forms part of the mitogen-activated protein kinase (MAPK) signaling pathways comprising a sequential three-tiered kinase cascade. Here, an upstream MAP3K (MEKK1) phosphorylates and activates a MAP2K (MKK4 and MKK7), which in turn phosphorylates and activates the MAPK, JNK. The C-terminal kinase domain of MEKK1 (MEKK-C) is constitutively active, while MKK4/7 and JNK are both activated by dual phosphorylation of S/Y, and T/Y residues within their activation loops, respectively. While improvements in the purification of large quantities of active JNKs have recently been made, inadequacies in their yield, purity, and the efficiency of their phosphorylation still exist. We describe a novel and robust method that further improves upon the purification of large yields of highly pure, phosphorylated JNK1β1, which is most suitable for biochemical and biophysical characterization. Codon harmonization of the JNK1β1 gene was used as a precautionary measure toward increasing the soluble overexpression of the kinase. While JNK1β1 and its substrate ATF2 were both purified to >99% purity as GST fusion proteins using GSH-agarose affinity chromatography and each cleaved from GST using thrombin, constitutively-active MEKK-C and inactive MKK4 were separately expressed in E. coli as thioredoxin-His6-tagged proteins and purified using urea refolding and Ni2+-IMAC, respectively. Activation of JNK1β1 was then achieved by successfully reconstituting the JNK MAPK activation cascade in vitro; MEKK-C was used to activate MKK4, which in turn was used to efficiently phosphorylate and activate large quantities of JNK1β1. Activated JNK1β1 was thereafter able to phosphorylate ATF2 with high catalytic efficiency. |
collection_details |
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title_short |
High yield purification of JNK1β1 and activation by |
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author2 |
Achilonu, Ikechukwu Dirr, Heini W. |
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doi_str |
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up_date |
2024-07-07T00:45:57.752Z |
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