ジャーナル: Science / 年: 2020 タイトル: Architecture and function of human uromodulin filaments in urinary tract infections. 著者: Gregor L Weiss / Jessica J Stanisich / Maximilian M Sauer / Chia-Wei Lin / Jonathan Eras / Dawid S Zyla / Johannes Trück / Olivier Devuyst / Markus Aebi / Martin Pilhofer / Rudi Glockshuber / 要旨: Uromodulin is the most abundant protein in human urine, and it forms filaments that antagonize the adhesion of uropathogens; however, the filament structure and mechanism of protection remain poorly ...Uromodulin is the most abundant protein in human urine, and it forms filaments that antagonize the adhesion of uropathogens; however, the filament structure and mechanism of protection remain poorly understood. We used cryo-electron tomography to show that the uromodulin filament consists of a zigzag-shaped backbone with laterally protruding arms. N-glycosylation mapping and biophysical assays revealed that uromodulin acts as a multivalent ligand for the bacterial type 1 pilus adhesin, presenting specific epitopes on the regularly spaced arms. Imaging of uromodulin-uropathogen interactions in vitro and in patient urine showed that uromodulin filaments associate with uropathogens and mediate bacterial aggregation, which likely prevents adhesion and allows clearance by micturition. These results provide a framework for understanding uromodulin in urinary tract infections and in its more enigmatic roles in physiology and disease.
集束イオンビーム - 装置: OTHER / 集束イオンビーム - イオン: OTHER / 集束イオンビーム - 電圧: 30 kV / 集束イオンビーム - 電流: 17 nA / 集束イオンビーム - 時間: 1800 sec. / 集束イオンビーム - 温度: 123 K / 集束イオンビーム - Initial thickness: 3000 nm / 集束イオンビーム - 最終 厚さ: 250 nm 集束イオンビーム - 詳細: The value given for _emd_sectioning_focused_ion_beam.instrument is FEI Helios. This is not in a list of allowed values set(['DB235', 'OTHER']) so OTHER is written into the XML file.
位置合わせマーカー
Manufacturer: Cytodiagnostics / 直径: 10 nm
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電子顕微鏡法
顕微鏡
FEI TITAN KRIOS
撮影
フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) 平均電子線量: 140.0 e/Å2