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| Big mitogen-activated protein kinase 1 (BMK1) is a redox-sensitive kinase |
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| Author(s): Abe J, Kusuhara M, Ulevitch RJ, Berk BC, Lee JD |
| Source: JOURNAL OF BIOLOGICAL CHEMISTRY Volume: 271 Issue: 28 Pages: 16586-16590 Published: JUL 12 1996 |
| Times Cited: 273 References: 35 |
| Abstract: Mitogen-activated protein (MAP) kinases are a multigene family activated by many extracellular stimuli. There are three groups of MAP kinases based on their dual phosphorylation motifs, TEY, TPY, and TGY, which are termed extracellular signal regulated protein kinases (ERK1/2), c-Jun N-terminal kinases, and p38, respectively. A new MAP kinase family member termed Big MAP kinase 1 (BMK1) or ERK5 was recently cloned, BMK1 has a TEY sequence similar to ERK1/2 but has unique COOH-terminal and loop-12 domains, To define BMK1 regulation, its activation in cultured rat vascular smooth muscle cells was characterized. Angiotensin II, phorbol ester, platelet-derived growth factor, and tumor necrosis factor-alpha were the strongest stimuli for ERK1/2 but were weak activators of BMK1. In contrast, H2O2 caused concentration-dependent activation of BMK1 but not ERK1/2. Sorbitol activated both BMK1 and ERK1/2. BMK1 activation by H2O2 was calcium-dependent and appeared ubiquitous as shown by stimulation in human skin fibroblasts, human vascular smooth muscle cells, and human umbilical vein endothelial cells, These findings demonstrate that activation of BMK1 is different from ERK1/2 and suggest an important role for BMK1 as a redox-sensitive kinase. |
| Document Type: Article |
| Language: English |
Addresses:
1. UNIV WASHINGTON, DEPT MED, DIV CARDIOL, SEATTLE, WA 98195 USA
2. Scripps Res Inst, DEPT IMMUNOL, LA JOLLA, CA 92037 USA |
| Publisher: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC, 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 |
| Subject Category: Biochemistry & Molecular Biology |
| IDS Number: UX126 |
| ISSN: 0021-9258 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |