Putative type IV secretory system protein / Type IV secretory system, conjugal DNA-protein transfer / DotD protein / DotD superfamily / DotD protein / Putative outer membrane core complex of type IVb secretion / Putative outer membrane core complex of type IVb secretion / : / OmpA-like domain profile. / OmpA-like domain superfamily ...Putative type IV secretory system protein / Type IV secretory system, conjugal DNA-protein transfer / DotD protein / DotD superfamily / DotD protein / Putative outer membrane core complex of type IVb secretion / Putative outer membrane core complex of type IVb secretion / : / OmpA-like domain profile. / OmpA-like domain superfamily / OmpA family / OmpA-like domain / Prokaryotic membrane lipoprotein lipid attachment site profile. 類似検索 - ドメイン・相同性
Type IV secretion protein IcmK / DotD / DotC / LphA (DotK) 類似検索 - 構成要素
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI150027-01
米国
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)
2T32DK007673
米国
National Institutes of Health/Office of the Director
S10OD020011
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
U24 GM129539
米国
Other private
SF349247
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
5R01AI095755-10
米国
Other government
1I01BX004447
米国
引用
ジャーナル: Elife / 年: 2020 タイトル: Structural analysis of the Dot/Icm type IV secretion system core complex. 著者: Clarissa L Durie / Michael J Sheedlo / Jeong Min Chung / Brenda G Byrne / Min Su / Thomas Knight / Michele Swanson / D Borden Lacy / Melanie D Ohi / 要旨: is an opportunistic pathogen that causes the potentially fatal pneumonia Legionnaires' Disease. This infection and subsequent pathology require the Dot/Icm Type IV Secretion System (T4SS) to deliver ... is an opportunistic pathogen that causes the potentially fatal pneumonia Legionnaires' Disease. This infection and subsequent pathology require the Dot/Icm Type IV Secretion System (T4SS) to deliver effector proteins into host cells. Compared to prototypical T4SSs, the Dot/Icm assembly is much larger, containing ~27 different components including a core complex reported to be composed of five proteins: DotC, DotD, DotF, DotG, and DotH. Using single particle cryo-electron microscopy (cryo-EM), we report reconstructions of the core complex of the Dot/Icm T4SS that includes a symmetry mismatch between distinct structural features of the outer membrane cap (OMC) and periplasmic ring (PR). We present models of known core complex proteins, DotC, DotD, and DotH, and two structurally similar proteins within the core complex, DotK and Lpg0657. This analysis reveals the stoichiometry and contact interfaces between the key proteins of the Dot/Icm T4SS core complex and provides a framework for understanding a complex molecular machine.