Structures of Pi4Kiiibeta Complexes Show Simultaneous Recruitment of Rab11 and its Effectors.
Burke, J.E., Inglis, A.J., Perisic, O., Masson, G.R., Mclaughlin, S.H., Rutaganira, F., Shokat, K.M., Williams, R.L.(2014) Science 344: 1035
- PubMed: 24876499 
- DOI: https://doi.org/10.1126/science.1253397
- Primary Citation of Related Structures:  
4D0L, 4D0M - PubMed Abstract: 
Phosphatidylinositol 4-kinases (PI4Ks) and small guanosine triphosphatases (GTPases) are essential for processes that require expansion and remodeling of phosphatidylinositol 4-phosphate (PI4P)-containing membranes, including cytokinesis, intracellular development of malarial pathogens, and replication of a wide range of RNA viruses. However, the structural basis for coordination of PI4K, GTPases, and their effectors is unknown. Here, we describe structures of PI4K¦Â (PI4KIII¦Â) bound to the small GTPase Rab11a without and with the Rab11 effector protein FIP3. The Rab11-PI4KIII¦Â interface is distinct compared with known structures of Rab complexes and does not involve switch regions used by GTPase effectors. Our data provide a mechanism for how PI4KIII¦Â coordinates Rab11 and its effectors on PI4P-enriched membranes and also provide strategies for the design of specific inhibitors that could potentially target plasmodial PI4KIII¦Â to combat malaria.
Organizational Affiliation: 
Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge CB2 0QH, UK. jeburke@uvic.ca rlw@mrc-lmb.cam.ac.uk.