Germany, France, European Union, United Kingdom, 9 items
Organization
Grant number
Country
Boehringer Ingelheim Fonds (BIF)
Germany
Human Frontier Science Program (HFSP)
LT0006/2022-L
France
European Molecular Biology Organization (EMBO)
ALTF 491-2022
European Union
Wellcome Trust
217202/Z/19/Z
United Kingdom
Medical Research Council (MRC, United Kingdom)
MR/V030930/1
United Kingdom
Medical Research Council (MRC, United Kingdom)
MR/T029323/1
United Kingdom
Wellcome Trust
FC001076
United Kingdom
Medical Research Council (MRC, United Kingdom)
FC001076
United Kingdom
Cancer Research UK
FC001076
United Kingdom
Citation
Journal: Science / Year: 2023 Title: PIM1 controls GBP1 activity to limit self-damage and to guard against pathogen infection. Authors: Daniel Fisch / Moritz M Pfleiderer / Eleni Anastasakou / Gillian M Mackie / Fabian Wendt / Xiangyang Liu / Barbara Clough / Samuel Lara-Reyna / Vesela Encheva / Ambrosius P Snijders / ...Authors: Daniel Fisch / Moritz M Pfleiderer / Eleni Anastasakou / Gillian M Mackie / Fabian Wendt / Xiangyang Liu / Barbara Clough / Samuel Lara-Reyna / Vesela Encheva / Ambrosius P Snijders / Hironori Bando / Masahiro Yamamoto / Andrew D Beggs / Jason Mercer / Avinash R Shenoy / Bernd Wollscheid / Kendle M Maslowski / Wojtek P Galej / Eva-Maria Frickel / Abstract: Disruption of cellular activities by pathogen virulence factors can trigger innate immune responses. Interferon-γ (IFN-γ)-inducible antimicrobial factors, such as the guanylate binding proteins ...Disruption of cellular activities by pathogen virulence factors can trigger innate immune responses. Interferon-γ (IFN-γ)-inducible antimicrobial factors, such as the guanylate binding proteins (GBPs), promote cell-intrinsic defense by attacking intracellular pathogens and by inducing programmed cell death. Working in human macrophages, we discovered that GBP1 expression in the absence of IFN-γ killed the cells and induced Golgi fragmentation. IFN-γ exposure improved macrophage survival through the activity of the kinase PIM1. PIM1 phosphorylated GBP1, leading to its sequestration by 14-3-3σ, which thereby prevented GBP1 membrane association. During infection, the virulence protein TgIST interfered with IFN-γ signaling and depleted PIM1, thereby increasing GBP1 activity. Although infected cells can restrain pathogens in a GBP1-dependent manner, this mechanism can protect uninfected bystander cells. Thus, PIM1 can provide a bait for pathogen virulence factors, guarding the integrity of IFN-γ signaling.
Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 20 sec. / Pretreatment - Pressure: 30.0 kPa Details: Glow discharged for 20 seconds at 25 mA and 0.3 bar using a Pelco EasyGlow device.
Vitrification
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV
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Electron microscopy
Microscope
FEI TITAN KRIOS
Image recording
Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 14974 / Average exposure time: 8.0 sec. / Average electron dose: 65.5 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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