| 2002 |
Rab11-FIP2 specifically interacts with Rab11 but not Rab4, Rab3, Rab5, Rab6, or Rab7. The COOH-terminal region containing the Rab11 binding domain (RBD) is necessary and sufficient for early endosomal membrane association, while the N-terminal C2 domain alone is insufficient for membrane binding. Expression of an RBD-containing deletion mutant causes tubulation of transferrin receptor-positive early endosomes, suggesting Rab11-FIP2 functions downstream of Rab11 in endosomal trafficking. |
Deletion mutagenesis, subcellular fractionation, immunofluorescence, dominant-negative overexpression in HeLa cells |
The Journal of biological chemistry |
High |
11994279
|
| 2002 |
Rab11-FIP2 contains an NPF motif that mediates binding to Reps1 (an EH domain protein involved in endocytosis) and also associates with the alpha-adaptin subunit of AP-2. Overexpression of Rab11-FIP2 suppresses EGF receptor internalization but not transferrin receptor internalization, through binding sites that promote complex formation with Rab11, Reps1, and alpha-adaptin. |
Co-immunoprecipitation, overexpression, receptor internalization assay in cell lines |
The Journal of biological chemistry |
Medium |
12364336
|
| 2005 |
EHD1 and EHD3 bind to Rab11-FIP2 via EH domain–NPF motif interactions. These associations are affected by the nucleotide-binding state of EHD proteins. Loss of EHD3 prevents delivery of internalized transferrin and early endosomal proteins to the endocytic recycling compartment (ERC), and alters the subcellular localization of Rab11-FIP2 and endogenous Rab11, retaining both in the cell periphery rather than the ERC. |
Co-immunoprecipitation, siRNA knockdown, immunofluorescence, transferrin recycling assay |
Molecular biology of the cell |
High |
16251358
|
| 2006 |
The C-terminal domain of Rab11-FIP2 forms a parallel homodimer coiled-coil in solution. Coiled-coil formation and Rab11 binding are separable functions: a construct truncated at the N-terminus of the C-terminal domain retains Rab11 binding affinity but loses structure, while a minimal coiled-coil construct (truncated at C-terminus) is well-structured but cannot bind Rab11. Conformational changes occur in Rab11-FIP2 upon Rab11 complex formation. |
Limited proteolysis, cross-linking, sedimentation equilibrium, circular dichroism, isothermal titration calorimetry, mutagenesis |
Biochemistry |
High |
16734419
|
| 2006 |
Rab11-FIP2 co-localizes with AQP2 in renal collecting duct cells. A dominant-negative Rab11-FIP2 lacking the C2 domain (Rab11-FIP2-ΔC2) disrupts recycling and causes condensation of AQP2 in a Rab11-positive compartment, abolishing AVP-stimulated AQP2 plasma membrane redistribution (the AQP2 shuttle). This effect requires binding of Rab11-FIP2-ΔC2 to Rab11. |
Dominant-negative overexpression, immunofluorescence, co-localization in AQP2-expressing cell lines and primary principal cells |
Traffic (Copenhagen, Denmark) |
Medium |
17156409
|
| 2006 |
A complex of Rab11 and the RBD of Rab11-FIP2 was crystallized; static light-scattering analyses indicate the complex contains two copies of Rab11 and two copies of Rab11-FIP2 in solution, consistent with a 2:2 stoichiometry. |
Protein purification, crystallization, static light scattering |
Acta crystallographica. Section F, Structural biology and crystallization communications |
Medium |
16820696
|
| 2007 |
Point mutant Rab11-FIP2(R413G) or Rab11-FIP2(S229A/R413G) causes formation of a tubular cisternal structure containing Rab11a and decreases the rate of polymeric IgA transcytosis in polarized MDCK cells, without altering interactions with known binding partners. Different Rab11-FIP2 mutants (ΔC2 vs. SARG) distinguish distinct steps of the apical recycling pathway. |
Site-directed mutagenesis, overexpression in polarized MDCK cells, transcytosis assay, immunofluorescence |
American journal of physiology. Cell physiology |
Medium |
17626244
|
| 2008 |
A dominant-negative form of Rab11-FIP2 lacking its N-terminal C2 domain reduced supernatant-associated RSV titer 1,000-fold while increasing cell-associated virus titer, indicating FIP2 C2 domain is required for the final RSV budding step. Truncation of the Rab-binding domain from FIP2 caused accumulation of FIP2 in mature filamentous virions. RSV budding was shown to be independent of the ESCRT machinery. |
Dominant-negative overexpression, viral titer measurement, immunofluorescence in polarized epithelial cells |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
18621683
|
| 2009 |
Rab11-FIP2 forms a tripartite complex with myosin Vb and Rab11a that is required for cholesterol-regulated translocation of NPC1L1 from the endocytic recycling compartment to the plasma membrane. Dominant-negative mutants of any component of the myosin Vb·Rab11a·Rab11-FIP2 complex inhibit NPC1L1 export and decrease cellular cholesterol uptake. |
Dominant-negative overexpression, cholesterol uptake assay, immunofluorescence, pharmacological actin disruption |
The Journal of biological chemistry |
Medium |
19542231
|
| 2011 |
Rab11-FIP2 mutants (ΔC2 and SARG) both alter localization and co-localize with dynein heavy chain, suggesting involvement in microtubule-dependent centripetal movement of endosomes. ΔC2 but not SARG causes clustering of early endosomal markers Rab5b, Epsin 4, and IQGAP1, while SARG but not ΔC2 causes accumulation of clathrin heavy chain and AP-1 at membranes. |
Dominant-negative overexpression, immunofluorescence, co-localization in polarized MDCK cells |
Cellular logistics |
Low |
21686255
|
| 2012 |
Rab11-FIP2 is phosphorylated on Ser-227 by MARK2, and this phosphorylation regulates epithelial cell polarity. Non-phosphorylatable S227A mutant causes loss of lumen formation in MDCK cysts; pseudophosphorylated S227E mutant induces multiple lumens and alters composition of adherens junctions (loss of E-cadherin, retention of p120-catenin and K-cadherin) and tight junctions (loss of occludin, altered claudin composition). These polarity effects do not require myosin Vb or Rab11a. |
Site-directed mutagenesis (S227A, S227E), 3D Matrigel cyst culture, immunofluorescence, western blot in MDCK cells |
Molecular biology of the cell |
High |
22553350
|
| 2012 |
The Myosin Vb/Rab11A/Rab11-FIP2 platform regulates langerin recycling at two distinct sites: first at the sorting site in the endosomal recycling compartment (ERC) where transport vesicles are formed, and subsequently at the late stage of docking/tethering and fusion of recycling vesicles to the plasma membrane, in a strict temporal order. |
Live-FRET, fast FRAP video, fast confocal microscopy, TIRF microscopy in live cells |
Traffic (Copenhagen, Denmark) |
Medium |
22420646
|
| 2014 |
Specific residues S229 and G233 in Rab11-FIP2 are required for interaction with MYO5B. Disruption of the MYO5B/Rab11-FIP2 association (by mutation S229P/G233E or Rab11-FIP2 knockdown) increases Rab11a-containing vesicle speed and track length, consistent with impaired MYO5B tethering at the cytoskeleton, supporting the role of this interaction in stabilizing the Rab11a functional complex. |
Random mutagenesis, yeast two-hybrid, co-immunoprecipitation, live-cell vesicle tracking (HeLa and MDCK cells), siRNA knockdown |
Traffic (Copenhagen, Denmark) |
High |
24372966
|
| 2017 |
MARK2-phosphorylated Rab11-FIP2 (pS227-FIP2) interacts with Eps15 via the NPF domains of FIP2. During recovery of cell polarity, Eps15 localizes to the lateral membrane before pS227-FIP2 arrival, and later they co-localize. Pseudophosphorylated FIP2(S227E) traps Eps15 and prevents its lateral membrane localization; mutation of any of the three NPF domains in FIP2(S227E) rescues Eps15 localization and restores single-lumen cyst formation. Knockdown of Eps15 alters pS227-FIP2 localization and induces multiple lumens. |
Co-immunoprecipitation, NPF domain mutagenesis, siRNA knockdown, immunofluorescence, 3D cyst culture in MDCK cells |
Molecular biology of the cell |
High |
28228550
|
| 2017 |
Rab11-FIP2 is recruited to the Chlamydia pneumoniae nascent inclusion upon internalization and retained throughout infection. siRNA knockdown of Rab11-FIP2 impairs C. pneumoniae internalization and infection. Rab11-FIP2 regulates intracellular positioning of the inclusion, and its binding to Rab11 recruits myosin Vb to the early inclusion to regulate relocation from the cell periphery to the perinuclear region. |
siRNA knockdown, immunofluorescence, expression of deletion variants, infection assay |
PLoS pathogens |
Medium |
28787457
|
| 2018 |
Rab11-FIP2 interacts with glycolytic kinase PGK1 and promotes its ubiquitination, leading to inactivation of the AKT/mTOR signaling pathway in non-small cell lung cancer cells. |
Co-immunoprecipitation, ubiquitination assay, overexpression, western blot |
Biochemical and biophysical research communications |
Low |
30471866
|
| 2019 |
Under basal conditions, RAB11FIP2 (FIP2) associates with AMPA receptors (AMPARs/GluA1) at immobile compartments separately from recycling endosomes, preventing GluA1 from reaching dendritic spine surfaces. Upon LTP induction, FIP2 is rapidly mobilized, dissociates from AMPARs, and undergoes dephosphorylation. This dissociation and FIP2 dephosphorylation are required for LTP, but FIP2-Rab11 interaction is not required for this process. |
shRNA knockdown, co-immunoprecipitation, live imaging, immunofluorescence in rat hippocampal slices |
Journal of cell science |
Medium |
31757887
|
| 2019 |
Knockdown of Rab11-FIP2 inhibits migration and invasion of nasopharyngeal carcinoma cells by decreasing expression of Rac and Cdc42 (Rho GTPases), without affecting EMT markers or Akt signaling. |
siRNA knockdown, migration/invasion assay, western blot for Rho GTPases |
Journal of cellular biochemistry |
Low |
31452257
|
| 2025 |
Rab11-FIP2 and Rab11b (but not Rab11a) control caspase-1-mediated cleavage of pro-IL-1β and GSDMD and pyroptotic cell death in human macrophages. Rab11-FIP2 controls LPS-stimulated IKKβ activation by TAK1 and IKKβ-mediated NLRP3 translocation to the trans-Golgi network. NLRP3 binds Rab11-FIP2 via its KMKK motif, while Rab11-FIP2 interacts with NLRP3 via its N-terminal C2 domain. Formation of PI4P-positive endosomes and ASC-specks are controlled by Rab11-FIP2. |
siRNA/shRNA knockdown, co-immunoprecipitation, domain deletion mutagenesis, inflammasome activation assays (IL-1β ELISA, caspase-1 cleavage, pyroptosis), immunofluorescence in human macrophages |
bioRxivpreprint |
Medium |
bio_10.1101_2025.05.19.654879
|