Abstract:
:SMG-9 is a component of the NMD complex, a heterotetramer that also includes SMG-1 and SMG-8 in the complex. SMG-9 was also originally identified as a tyrosine-phosphorylated protein but the role of the phosphorylation is not yet known. In this study, we determined that IQGAP protein, an actin cytoskeleton modifier acts as a binding partner with SMG-9 and this binding is regulated by phosphorylation of SMG-9 at Tyr-41. SMG-9 is co-localized with IQGAP1 as a part of the process of actin enrichment in non-stimulated cells, but not in the EGF-stimulated cells. Furthermore, an increase in the ability of SMG-9 to bind to SMG-8 occurs in response to EGF stimulation. These results suggest that tyrosine phosphorylation of SMG-9 may play a role in the formation of the NMD complex in the cells stimulated by the growth factor.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Takeda S,Fujimoto A,Yamauchi E,Hiyoshi M,Kido H,Watanabe T,Kaibuchi K,Ohta T,Konishi Hdoi
10.1016/j.bbrc.2011.05.099subject
Has Abstractpub_date
2011-06-24 00:00:00pages
29-33issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(11)00873-4journal_volume
410pub_type
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