Abstract:
:Arl13b is an atypical Arf/Arl-family GTPase consisting of an extending large C-terminal region (C domain) and Arf-homologous GTP-binding motifs in the N terminus (N domain). Although Arl13b appears to be involved in cilia formation, its precise function and roles of the domains remain unknown. Here, we show the unique domain architecture of Arl13b by analyzing the relationship between its biochemical properties and cilia formation. Arl13b binds guanine nucleotides and specifically localizes to cilia. The ciliary localization of Arl13b requires both N and C domains but is independent of its guanine nucleotide-binding ability. Arl13b is capable of self-associating via N domain, and overexpression of N domain inhibits not only cilia formation but also the maintenance of pre-generated cilia. These findings suggest that N and C domains of Arl13b cooperatively regulate its ciliary localization and that N domain-dependent self-association of Arl13b may be important for its function in cilia biogenesis.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Hori Y,Kobayashi T,Kikko Y,Kontani K,Katada Tdoi
10.1016/j.bbrc.2008.06.001subject
Has Abstractpub_date
2008-08-15 00:00:00pages
119-24issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(08)01122-4journal_volume
373pub_type
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