purine ribonucleoside triphosphate binding / CD8-positive, alpha-beta T cell differentiation / thymic T cell selection / CD8-positive, alpha-beta T cell homeostasis / Antigen processing: Ub, ATP-independent proteasomal degradation / T-helper 1 cell differentiation / negative regulation of regulatory T cell differentiation / cellular response to type I interferon / Regulation of ornithine decarboxylase (ODC) / proteasome core complex ...purine ribonucleoside triphosphate binding / CD8-positive, alpha-beta T cell differentiation / thymic T cell selection / CD8-positive, alpha-beta T cell homeostasis / Antigen processing: Ub, ATP-independent proteasomal degradation / T-helper 1 cell differentiation / negative regulation of regulatory T cell differentiation / cellular response to type I interferon / Regulation of ornithine decarboxylase (ODC) / proteasome core complex / Proteasome assembly / T-helper 17 cell differentiation / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis / flagellated sperm motility / myofibril / proteasomal ubiquitin-independent protein catabolic process / proteasome storage granule / AMPK-induced ERAD and lysosome mediated degradation of PD-L1(CD274) / proteasome endopeptidase complex / NF-kappaB binding / proteasome core complex, beta-subunit complex / threonine-type endopeptidase activity / proteasome core complex, alpha-subunit complex / proteasome assembly / GSK3B-mediated proteasomal degradation of PD-L1(CD274) / SPOP-mediated proteasomal degradation of PD-L1(CD274) / regulation of G1/S transition of mitotic cell cycle / immune system process / positive regulation of interleukin-2 production / ciliary tip / Ribosome Quality Control (RQC) complex extracts and degrades nascent peptide / response to type II interferon / proteasome complex / : / regulation of proteasomal protein catabolic process / sarcomere / sperm end piece / Regulation of activated PAK-2p34 by proteasome mediated degradation / proteasomal protein catabolic process / Autodegradation of Cdh1 by Cdh1:APC/C / negative regulation of inflammatory response to antigenic stimulus / APC/C:Cdc20 mediated degradation of Securin / Asymmetric localization of PCP proteins / Ubiquitin-dependent degradation of Cyclin D / lipopolysaccharide binding / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / AUF1 (hnRNP D0) binds and destabilizes mRNA / TNFR2 non-canonical NF-kB pathway / Assembly of the pre-replicative complex / Vpu mediated degradation of CD4 / P-body / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of DVL / Degradation of AXIN / Degradation of CRY and PER proteins / meiotic cell cycle / Hh mutants are degraded by ERAD / Activation of NF-kappaB in B cells / G2/M Checkpoints / Degradation of GLI1 by the proteasome / Hedgehog ligand biogenesis / Autodegradation of the E3 ubiquitin ligase COP1 / Regulation of RUNX3 expression and activity / Defective CFTR causes cystic fibrosis / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Negative regulation of NOTCH4 signaling / response to virus / Hedgehog 'on' state / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / Vif-mediated degradation of APOBEC3G / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / MAPK6/MAPK4 signaling / Degradation of CDH1 / Degradation of beta-catenin by the destruction complex / positive regulation of type II interferon production / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / CDK-mediated phosphorylation and removal of Cdc6 / ABC-family protein mediated transport / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / FCERI mediated NF-kB activation / nuclear matrix / Regulation of expression of SLITs and ROBOs / Regulation of PTEN stability and activity / Interleukin-1 signaling / Orc1 removal from chromatin / Regulation of RUNX2 expression and activity / positive regulation of tumor necrosis factor production / Regulation of RAS by GAPs / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / UCH proteinases / KEAP1-NFE2L2 pathway / peptidase activity Similarity search - Function
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI143714
United States
Citation
Journal: Nat Commun / Year: 2023 Title: Structures revealing mechanisms of resistance and collateral sensitivity of Plasmodium falciparum to proteasome inhibitors. Authors: Hao-Chi Hsu / Daqiang Li / Wenhu Zhan / Jianxiang Ye / Yi Jing Liu / Annie Leung / Junling Qin / Benigno Crespo / Francisco-Javier Gamo / Hao Zhang / Liwang Cui / Alison Roth / Laura A ...Authors: Hao-Chi Hsu / Daqiang Li / Wenhu Zhan / Jianxiang Ye / Yi Jing Liu / Annie Leung / Junling Qin / Benigno Crespo / Francisco-Javier Gamo / Hao Zhang / Liwang Cui / Alison Roth / Laura A Kirkman / Huilin Li / Gang Lin / Abstract: The proteasome of the malaria parasite Plasmodium falciparum (Pf20S) is an advantageous drug target because its inhibition kills P. falciparum in multiple stages of its life cycle and synergizes with ...The proteasome of the malaria parasite Plasmodium falciparum (Pf20S) is an advantageous drug target because its inhibition kills P. falciparum in multiple stages of its life cycle and synergizes with artemisinins. We recently developed a macrocyclic peptide, TDI-8304, that is highly selective for Pf20S over human proteasomes and is potent in vitro and in vivo against P. falciparum. A mutation in the Pf20S β6 subunit, A117D, confers resistance to TDI-8304, yet enhances both enzyme inhibition and anti-parasite activity of a tripeptide vinyl sulfone β2 inhibitor, WLW-vs. Here we present the high-resolution cryo-EM structures of Pf20S with TDI-8304, of human constitutive proteasome with TDI-8304, and of Pf20Sβ6 with WLW-vs that give insights into the species selectivity of TDI-8304, resistance to it, and the collateral sensitivity associated with resistance, including that TDI-8304 binds β2 and β5 in wild type Pf20S as well as WLW-vs binds β2 and β5 in Pf20Sβ6. We further show that TDI-8304 kills P. falciparum as quickly as chloroquine and artemisinin and is active against P. cynomolgi at the liver stage. This increases interest in using these structures to facilitate the development of Pf20S inhibitors that target multiple proteasome subunits and limit the emergence of resistance.
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 279 K / Instrument: FEI VITROBOT MARK IV
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Electron microscopy
Microscope
FEI TITAN KRIOS
Specialist optics
Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Image recording
Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Digitization - Dimensions - Width: 11520 pixel / Digitization - Dimensions - Height: 8184 pixel / Number grids imaged: 1 / Number real images: 16114 / Average exposure time: 1.0 sec. / Average electron dose: 58.0 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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