• Login
    View Item 
    •   Home
    • UMass Chan Faculty and Staff Research and Publications
    • UMass Chan Faculty and Researcher Publications
    • View Item
    •   Home
    • UMass Chan Faculty and Staff Research and Publications
    • UMass Chan Faculty and Researcher Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of eScholarship@UMassChanCommunitiesPublication DateAuthorsUMass Chan AffiliationsTitlesDocument TypesKeywordsThis CollectionPublication DateAuthorsUMass Chan AffiliationsTitlesDocument TypesKeywordsProfilesView

    My Account

    LoginRegister

    Help

    AboutSubmission GuidelinesData Deposit PolicySearchingUsage StatisticsAccessibilityTerms of UseWebsite Migration FAQ

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    The MKK7 gene encodes a group of c-Jun NH2-terminal kinase kinases

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    9891090.pdf
    Size:
    1.121Mb
    Format:
    PDF
    Download
    Authors
    Tournier, Cathy
    Whitmarsh, Alan J.
    Cavanagh, Julie
    Barrett, Tamera
    Davis, Roger J.
    UMass Chan Affiliations
    Department of Biochemistry and Molecular Biology
    Howard Hughes Medical Institute and Program in Molecular Medicine
    Document Type
    Journal Article
    Publication Date
    1999-01-16
    Keywords
    Alternative Splicing
    Amino Acid Sequence
    Animals
    COS Cells
    Cell Line
    Cell Nucleus
    Chromosome Mapping
    Cloning, Molecular
    Cytoplasm
    Enzyme Activation
    Humans
    In Situ Hybridization, Fluorescence
    Isoenzymes
    *MAP Kinase Kinase 4
    MAP Kinase Kinase 7
    MAP Kinase Kinase Kinases
    Mice
    *Mitogen-Activated Protein Kinase Kinases
    Molecular Sequence Data
    Protein Kinases
    Protein-Serine-Threonine Kinases
    Protein-Tyrosine Kinases
    Sequence Homology, Amino Acid
    Life Sciences
    Medicine and Health Sciences
    Show allShow less
    
    Metadata
    Show full item record
    Abstract
    The c-Jun NH2-terminal protein kinase (JNK) is a member of the mitogen-activated protein kinase (MAPK) group and is an essential component of a signaling cascade that is activated by exposure of cells to environmental stress. JNK activation is regulated by phosphorylation on both Thr and Tyr residues by a dual-specificity MAPK kinase (MAPKK). Two MAPKKs, MKK4 and MKK7, have been identified as JNK activators. Genetic studies demonstrate that MKK4 and MKK7 serve nonredundant functions as activators of JNK in vivo. We report here the molecular cloning of the gene that encodes MKK7 and demonstrate that six isoforms are created by alternative splicing to generate a group of protein kinases with three different NH2 termini (alpha, beta, and gamma isoforms) and two different COOH termini (1 and 2 isoforms). The MKK7alpha isoforms lack an NH2-terminal extension that is present in the other MKK7 isoforms. This NH2-terminal extension binds directly to the MKK7 substrate JNK. Comparison of the activities of the MKK7 isoforms demonstrates that the MKK7alpha isoforms exhibit lower activity, but a higher level of inducible fold activation, than the corresponding MKK7beta and MKK7gamma isoforms. Immunofluorescence analysis demonstrates that these MKK7 isoforms are detected in both cytoplasmic and nuclear compartments of cultured cells. The presence of MKK7 in the nucleus was not, however, required for JNK activation in vivo. These data establish that the MKK4 and MKK7 genes encode a group of protein kinases with different biochemical properties that mediate activation of JNK in response to extracellular stimuli.
    Source
    Mol Cell Biol. 1999 Feb;19(2):1569-81.
    Permanent Link to this Item
    http://hdl.handle.net/20.500.14038/38579
    PubMed ID
    9891090
    Related Resources
    Link to Article in PubMed
    Collections
    UMass Chan Faculty and Researcher Publications

    entitlement

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      Role of the JIP4 scaffold protein in the regulation of mitogen-activated protein kinase signaling pathways

      Kelkar, Nyaya; Standen, Claire L.; Davis, Roger J. (2005-03-16)
      The c-Jun NH2-terminal kinase (JNK)-interacting protein (JIP) group of scaffold proteins (JIP1, JIP2, and JIP3) can interact with components of the JNK signaling pathway and potently activate JNK. Here we describe the identification of a fourth member of the JIP family. The primary sequence of JIP4 is most closely related to that of JIP3. Like other members of the JIP family of scaffold proteins, JIP4 binds JNK and also the light chain of the microtubule motor protein kinesin-1. However, the function of JIP4 appears to be markedly different from other JIP proteins. Specifically, JIP4 does not activate JNK signaling. In contrast, JIP4 serves as an activator of the p38 mitogen-activated protein (MAP) kinase pathway by a mechanism that requires the MAP kinase kinases MKK3 and MKK6. The JIP4 scaffold protein therefore appears to be a new component of the p38 MAP kinase signaling pathway.
    • Thumbnail

      A mammalian scaffold complex that selectively mediates MAP kinase activation

      Whitmarsh, Alan J.; Cavanagh, Julie; Tournier, Cathy; Yasuda, Jun; Davis, Roger J. (1998-09-11)
      The c-Jun NH2-terminal kinase (JNK) group of mitogen-activated protein (MAP) kinases is activated by the exposure of cells to multiple forms of stress. A putative scaffold protein was identified that interacts with multiple components of the JNK signaling pathway, including the mixed-lineage group of MAP kinase kinase kinases (MLK), the MAP kinase kinase MKK7, and the MAP kinase JNK. This scaffold protein selectively enhanced JNK activation by the MLK signaling pathway. These data establish that a mammalian scaffold protein can mediate activation of a MAP kinase signaling pathway.
    • Thumbnail

      Regulation of Drosophila p38 activation by specific MAP2 kinase and MAP3 kinase in response to different stimuli

      Zhuang, Zi-Heng; Zhou, Yuan; Yu, Ming-Can; Silverman, Neal S.; Ge, Bao-Xue (2005-07-15)
      The p38 mitogen-activated protein kinase (MAPK) signaling pathway plays an important role in cellular responses to inflammatory stimuli and environmental stress. Activation of p38 is mediated through phosphorylation by upstream MAPKK, which in turn is activated by MAPKKK. However, the mechanism of how different upstream MAP2Ks and MAP3Ks specifically contribute to p38 activation in response to different stimuli is still not clearly understood. By using double-stranded RNA-mediated interference (RNAi) in Drosophila cells, we demonstrate that D-MKK3 is a major MAP2K responsible for D-p38 activation by UV, heat shock, NaCl or peptiodglycan (PGN). Stimulation of UV and PGN activates D-p38 through D-MEKK1, heat shock-induced activation of D-p38 signals through both D-MEKK1 and D-ASK1. On the other hand, maximal activation of D-p38 by NaCl requires the expression of four MAP3Ks.
    DSpace software (copyright © 2002 - 2023)  DuraSpace
    Lamar Soutter Library, UMass Chan Medical School | 55 Lake Avenue North | Worcester, MA 01655 USA
    Quick Guide | escholarship@umassmed.edu
    Works found in eScholarship@UMassChan are protected by copyright unless otherwise indicated.
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.