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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2015 ; 112 (15): E1908-15 Nephropedia Template TP
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Structural basis for the geometry-driven localization of a small protein #MMPMID25825747
Gill RL; Castaing JP; Hsin J; Tan IS; Wang X; Huang KC; Tian F; Ramamurthi KS
Proc Natl Acad Sci U S A 2015[Apr]; 112 (15): E1908-15 PMID25825747show ga
Despite extensive studies of protein trafficking across length scales of many microns, how proteins correctly localize within the smaller length scales of bacterial cells is still poorly understood. Recently, we proposed that slight membrane curvature, defined by the surface geometry of a bacterium, can drive the localization of certain shape-sensing proteins. Here, we developed an assay to quantify membrane curvature recognition by the small bacterial protein SpoVM and used NMR to determine the structural basis of curvature recognition. NMR and molecular dynamics simulations suggested a model wherein unusually deep membrane insertion allows the protein to sense subtle acyl chain packing differences between differently curved membranes, a distinct curvature-sensing mechanism from those used by proteins that sense high membrane curvature.