National Health and Medical Research Council (NHMRC, Australia)
APP1196924
オーストラリア
Human Frontier Science Program (HFSP)
RGEC33/2023
フランス
Japan Society for the Promotion of Science (JSPS)
21K15153
日本
Australian Research Council (ARC)
FT200100270
オーストラリア
Australian Research Council (ARC)
DP210100362
オーストラリア
引用
ジャーナル: Nat Commun / 年: 2024 タイトル: Cell-to-cell interactions revealed by cryo-tomography of a DPANN co-culture system. 著者: Matthew D Johnson / Doulin C Shepherd / Hiroyuki D Sakai / Manasi Mudaliyar / Arun Prasad Pandurangan / Francesca L Short / Paul D Veith / Nichollas E Scott / Norio Kurosawa / Debnath Ghosal / 要旨: DPANN is a widespread and diverse group of archaea characterized by their small size, reduced genome, limited metabolic pathways, and symbiotic existence. Known DPANN species are predominantly ...DPANN is a widespread and diverse group of archaea characterized by their small size, reduced genome, limited metabolic pathways, and symbiotic existence. Known DPANN species are predominantly obligate ectosymbionts that depend on their host for proliferation. The structural and molecular details of host recognition, host-DPANN intercellular communication, and host adaptation in response to DPANN attachment remain unknown. Here, we use electron cryotomography (cryo-ET) to show that the Microcaldus variisymbioticus ARM-1 may interact with its host, Metallosphaera javensis AS-7 through intercellular proteinaceous nanotubes. Combining cryo-ET and sub-tomogram averaging, we show the in situ architectures of host and DPANN S-layers and the structures of the nanotubes in their primed and extended states. In addition, comparative proteomics and genomic analyses identified host proteomic changes in response to DPANN attachment. These results provide insights into the structural basis of host-DPANN communication and deepen our understanding of the host ectosymbiotic relationships.
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV
詳細
Cultures of Metallosphaera javensis AS-7 were routinely cultivated at 55 degrees Celsius using modified Brocks basal salt medium supplemented with 1 g/L yeast extract (MBSY medium). The pH of the medium was adjusted to 3.0 by the addition of 50% (v/v) sulfate.