The F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs) domain of Nitric Oxide Synthase TRaffic INducer (NOSTRIN)
F-BAR domains are dimerization modules that bind and bend membranes and are found in proteins involved in membrane dynamics and actin reorganization. Nitric Oxide Synthase TRaffic INducer (NOSTRIN) is expressed in endothelial and epithelial cells and is involved in the regulation, trafficking and targeting of endothelial NOS (eNOS). NOSTRIN facilitates the endocytosis of eNOS by coordinating the functions of dynamin and the Wiskott-Aldrich syndrome protein (WASP). Increased expression of NOSTRIN may be correlated to preeclampsia. NOSTRIN contains an N-terminal F-BAR domain and a C-terminal SH3 domain. F-BAR domains form banana-shaped dimers with a positively-charged concave surface that binds to negatively-charged lipid membranes. They can induce membrane deformation in the form of long tubules. The F-BAR domain of NOSTRIN is necessary and sufficient for its membrane association and is responsible for its subcellular localization.