Abstract:
:Rap1 and Rap2 are similar Ras-like G proteins but perform distinct functions. By the affinity chromatography/mass-spectrometry approach and the yeast two-hybrid screening, we identified Misshapen/NIKs-related kinase (MINK) as a novel Rap2-interacting protein that does not interact with Rap1 or Ras. MINK is a member of the STE20 group of mitogen-activated protein kinase kinase kinase kinases. The interaction between MINK and Rap2 was GTP-dependent and required Phe39 within the effector region of Rap2; the corresponding residue in Rap1 and Ras is Ser. MINK was enriched in the brain, and both MINK and its close relative, Traf2- and Nck-interacting kinase (TNIK), interacted with a postsynaptic scaffold protein containing tetratricopeptide repeats, ankyrin repeats and a coiled-coil region (TANC1) and induced its phosphorylation, under control of Rap2 in cultured cells. These are novel actions of MINK and TNIK, and consistent with a role of MINK as a Rap2 effector in the brain.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Nonaka H,Takei K,Umikawa M,Oshiro M,Kuninaka K,Bayarjargal M,Asato T,Yamashiro Y,Uechi Y,Endo S,Suzuki T,Kariya KIdoi
10.1016/j.bbrc.2008.10.038subject
Has Abstractpub_date
2008-12-12 00:00:00pages
573-578issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(08)01982-7journal_volume
377pub_type
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