National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM122510
米国
引用
ジャーナル: Nat Commun / 年: 2020 タイトル: The structures of two archaeal type IV pili illuminate evolutionary relationships. 著者: Fengbin Wang / Diana P Baquero / Zhangli Su / Leticia C Beltran / David Prangishvili / Mart Krupovic / Edward H Egelman / 要旨: We have determined the cryo-electron microscopic (cryo-EM) structures of two archaeal type IV pili (T4P), from Pyrobaculum arsenaticum and Saccharolobus solfataricus, at 3.8 Å and 3.4 Å ...We have determined the cryo-electron microscopic (cryo-EM) structures of two archaeal type IV pili (T4P), from Pyrobaculum arsenaticum and Saccharolobus solfataricus, at 3.8 Å and 3.4 Å resolution, respectively. This triples the number of high resolution archaeal T4P structures, and allows us to pinpoint the evolutionary divergence of bacterial T4P, archaeal T4P and archaeal flagellar filaments. We suggest that extensive glycosylation previously observed in T4P of Sulfolobus islandicus is a response to an acidic environment, as at even higher temperatures in a neutral environment much less glycosylation is present for Pyrobaculum than for Sulfolobus and Saccharolobus pili. Consequently, the Pyrobaculum filaments do not display the remarkable stability of the Sulfolobus filaments in vitro. We identify the Saccharolobus and Pyrobaculum T4P as host receptors recognized by rudivirus SSRV1 and tristromavirus PFV2, respectively. Our results illuminate the evolutionary relationships among bacterial and archaeal T4P filaments and provide insights into archaeal virus-host interactions.
根拠: microscopy, helical filament was observed by negative staining and Cryo-EM
タイプ
名称
対称操作
数
identity operation
1_555
1
Buried area
192430 Å2
ΔGint
-1677 kcal/mol
Surface area
165630 Å2
対称性
らせん対称: (回転対称性: 1 / Dyad axis: no / N subunits divisor: 1 / Num. of operations: 41 / Rise per n subunits: 5.26051 Å / Rotation per n subunits: 101.691 °)