Abstract：
:Casein kinase 1 (CK1) plays central roles in various signal transduction pathways and performs many cellular activities. For many years CK1 was thought to act independently of modulatory subunits and in a constitutive manner. Recently, DEAD box RNA helicases, in particular DEAD box RNA helicase 3 X-linked (DDX3X), were found to stimulate CK1 activity in vitro In order to observe CK1 activity in living cells and to study its interaction with DDX3X, we developed a CK1-specific FRET biosensor. This tool revealed that DDX3X is indeed required for full CK1 activity in living cells. Two counteracting mechanisms control the activity of these enzymes. Phosphorylation by CK1 impairs the ATPase activity of DDX3X and RNA destabilizes the DDX3X-CK1 complex. We identified possible sites of interaction between DDX3X and CK1. While mutations identified in the DDX3X genes of human medulloblastoma patients can enhance CK1 activity in living cells, the mechanism of CK1 activation by DDX3X points to a possible therapeutic approach in CK1-related diseases such as those caused by tumors driven by aberrant Wnt/β-catenin and Sonic hedgehog (SHH) activation. Indeed, CK1 peptides can reduce CK1 activity.
journal_name
J Cell Scijournal_title
Journal of cell scienceauthors
Dolde C,Bischof J,Grüter S,Montada A,Halekotte J,Peifer C,Kalbacher H,Baumann U,Knippschild U,Suter Bdoi
10.1242/jcs.207316subject
Has Abstractpub_date
2018-01-04 00:00:00issue
1eissn
0021-9533issn
1477-9137pii
jcs.207316journal_volume
131pub_type
杂志文章abstract：:Dynamic assembly and remodeling of actin is critical for many cellular processes during development and stress adaptation. In filamentous fungi and budding yeast, actin cables align in a polarized manner along the mother-to-daughter cell axis, and are essential for the establishment and maintenance of polarity; moreov...
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doi：
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doi：
更新日期：1990-12-01 00:00:00
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更新日期：2010-04-01 00:00:00
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doi：
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