Research Project
Grant-in-Aid for Scientific Research (B)
Cell motility and cell division are under coordinated regulation of membrane traffic and actin cytoskeleton remodeling. The Arf and Rab families of small GTPases regulate membrane traffic, and the Rho family small GTPases regulate cytoskeleton remodeling. In this study, we showed that Arfaptins, which are dual effectors of Arl1 and Rac1, are recruited onto trans-Golgi membranes through interacting with Arl1, and induce membrane tubulation in an Arl1-dependent manner. X-ray crystal structure of the Arl1-Arfaptin-2 complex revealed the molecular basis for the membrane recruitment of Arfaptin-2 and indicated a possibility that Arl1 and Rac1 compete with each other for binding to Arfaptin-2.On the other hand, we showed that Arf6 is recruited to the Flemming body during cytokinesis through interacting with MLKP1, which forms a complex with MgcRacGAP, and is involved in regulation of cytokinesis. Furthermore, We revealed the structure of the Arf6-MKLP1 complex by X-ray crystallography and suggested the molecular basis for recruitment of Arf6 onto the Flemming body. We further showed that EFA6, an Arf-GEF, is involved in local activation of Arf6 during cytokinesis.
All 2013 2012 2011 2010 Other
All Journal Article (14 results) (of which Peer Reviewed: 14 results) Presentation (34 results) (of which Invited: 2 results) Remarks (1 results)
FEBS Lett
Volume: 583 Issue: 11 Pages: 1617-1623
10.1016/j.febslet.2013.03.042
120005293580
Cell Structure and Function
Volume: 38 Issue: 1 Pages: 31-41
10.1247/csf.12028
130004053889
Volume: 37 Issue: 2 Pages: 141-154
10.1247/csf.12015
130004137585
Journal of Biological Chemistry
Volume: 287 Issue: 30 Pages: 25478-25489
10.1074/jbc.m112.365783
J. Cell Sci., 1
Volume: 125 Pages: 4049-4057
10.1242/jcs.102913
EMBO J
Volume: 31 Issue: 11 Pages: 2590-2603
10.1038/emboj.2012.89
120004161052
Cell Host & Microbe
Volume: 11 Issue: 4 Pages: 325-336
10.1016/j.chom.2012.03.001
Biological and Pharmaceutical Bulletin
Volume: 35 Issue: 3 Pages: 408-412
10.1248/bpb.35.408
130001872324
Volume: 36 Issue: 2 Pages: 223-235
10.1247/csf.11035
130004137571
J. Biol. Chem.
Volume: 286 Issue: 44 Pages: 38159-38167
10.1074/jbc.m111.281006
Genes Cells
Volume: 16 Issue: 9 Pages: 938-950
10.1111/j.1365-2443.2011.01538.x
Volume: 286 Issue: 13 Pages: 11569-11578
10.1074/jbc.m110.201442
J.Biol.Chem.
Volume: 286 Pages: 11569-11578
Mol.Biol.Cell
Volume: 21 Pages: 2746-2755
http://www.pharm.kyoto-u.ac.jp/physchem/