Top: Schematic of GP2 filaments, with labeled residue ranges of ZP domains and four N-glycosylation sites. Middle left: Cryo-EM map of GP2 filaments, color-coded according to the schematic above. The density of one of the flexible branches was indicated by a black arrow. Middle right: Atomic model of GP2 filaments, with five N-glycosylation sites marked by arrows. Bottom: Proposed model of GP2 filaments’ function in the digestive tract. The filament core of UMOD and GP2 is colored in dark blue and green, respectively. The EGF domains and D8C/D10C domains in the branches of both proteins are shown in grey and light blue, respectively. High-mannose N-glycans are colored in red. UPEC cells and their adhesive pilus are colored in pink, while the proteases (such as elastase) are colored in yellow.
#Glycoprotein 2 (GP2) filaments protect against infections by acting as decoys for the bacterial #lectin FimH. The #cryoEM structure of GP2 filaments provides insights into filament assembly and #antibacterial function in the digestive tract @plosbiology.org 🧪 plos.io/3HP2obF