- EMDB-51689: Mycobacterial cytochrome bc1:aa3 with inhibitor -
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Basic information
Entry
Database: EMDB / ID: EMD-51689
Title
Mycobacterial cytochrome bc1:aa3 with inhibitor
Map data
main map
Sample
Complex: cytochrome bc1:aa3
Protein or peptide: x 11 types
Ligand: x 14 types
Keywords
membrane protein / inhibitor complex / mycobacterium / cytochrome bc / OXIDOREDUCTASE
Function / homology
Function and homology information
aerobic electron transport chain / cytochrome-c oxidase / oxidative phosphorylation / quinol-cytochrome-c reductase / quinol-cytochrome-c reductase activity / cytochrome-c oxidase activity / superoxide dismutase / electron transport coupled proton transport / superoxide dismutase activity / oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen ...aerobic electron transport chain / cytochrome-c oxidase / oxidative phosphorylation / quinol-cytochrome-c reductase / quinol-cytochrome-c reductase activity / cytochrome-c oxidase activity / superoxide dismutase / electron transport coupled proton transport / superoxide dismutase activity / oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen / ATP synthesis coupled electron transport / respiratory electron transport chain / monooxygenase activity / electron transport chain / 2 iron, 2 sulfur cluster binding / iron ion binding / copper ion binding / heme binding / metal ion binding / membrane / plasma membrane Similarity search - Function
Protein of unknown function DUF2631 / Protein of unknown function (DUF2631) / Protein of unknown function DUF5130 / Domain of unknown function (DUF5130) / Cytochrome bc1 complex, cytochrome c subunit / Cytochrome c oxidase subunit IV, actinobacteria / QcrA subunit, N-terminal / Cytochrome c oxidase subunit IV / QcrA subunit N-terminal region / Cytochrome b(N-terminal)/b6/petB ...Protein of unknown function DUF2631 / Protein of unknown function (DUF2631) / Protein of unknown function DUF5130 / Domain of unknown function (DUF5130) / Cytochrome bc1 complex, cytochrome c subunit / Cytochrome c oxidase subunit IV, actinobacteria / QcrA subunit, N-terminal / Cytochrome c oxidase subunit IV / QcrA subunit N-terminal region / Cytochrome b(N-terminal)/b6/petB / Cytochrome c oxidase, subunit I bacterial type / : / Cytochrome C oxidase, cbb3-type, subunit III / Cytochrome c oxidase subunit III / Cytochrome c oxidase subunit III-like / Cytochrome c oxidase, subunit III, 4-helical bundle / Cytochrome c oxidase subunit III / Heme-copper oxidase subunit III family profile. / Cytochrome c oxidase subunit III-like superfamily / Cytochrome c/quinol oxidase subunit II / Superoxide dismutase, copper/zinc, binding site / Copper/Zinc superoxide dismutase signature 2. / Superoxide dismutase, copper/zinc binding domain / Copper/zinc superoxide dismutase (SODC) / Superoxide dismutase-like, copper/zinc binding domain superfamily / Copper centre Cu(A) / CO II and nitrous oxide reductase dinuclear copper centers signature. / Cytochrome C oxidase subunit II, transmembrane domain superfamily / Cytochrome c oxidase, subunit I, copper-binding site / Heme-copper oxidase catalytic subunit, copper B binding region signature. / Cytochrome c oxidase-like, subunit I domain / Cytochrome oxidase subunit I profile. / Cytochrome C oxidase subunit II, periplasmic domain / Cytochrome c oxidase subunit I / Cytochrome c oxidase-like, subunit I superfamily / Cytochrome C and Quinol oxidase polypeptide I / Cytochrome c oxidase subunit II-like C-terminal / Cytochrome oxidase subunit II copper A binding domain profile. / Cytochrome b/b6, N-terminal / Cytochrome b/b6-like domain superfamily / Cytochrome b/b6 N-terminal region profile. / Di-haem cytochrome, transmembrane / Rieske iron-sulphur protein / Cytochrome c / Rieske [2Fe-2S] domain / Rieske [2Fe-2S] iron-sulphur domain / Rieske [2Fe-2S] iron-sulfur domain profile. / Rieske [2Fe-2S] iron-sulphur domain superfamily / Cytochrome c family profile. / Cytochrome c-like domain / Cytochrome c-like domain superfamily / Cupredoxin / Prokaryotic membrane lipoprotein lipid attachment site profile. Similarity search - Domain/homology
Cytochrome c oxidase subunit 1 / Superoxide dismutase [Cu-Zn] / Transmembrane protein / Probable cytochrome c oxidase subunit 3 / Cytochrome bc1 complex cytochrome c subunit / Cytochrome bc1 complex Rieske iron-sulfur subunit / Cytochrome bc1 complex cytochrome b subunit / Cytochrome c oxidase polypeptide 4 / cytochrome-c oxidase / Uncharacterized protein MSMEG_4692/MSMEI_4575 / Uncharacterized protein Similarity search - Component
Biological species
Mycolicibacterium smegmatis MC2 155 (bacteria)
Method
single particle reconstruction / cryo EM / Resolution: 3.1 Å
Journal: NPJ Drug Discov / Year: 2025 Title: Structural and mechanistic study of a novel inhibitor analogue of cytochrome bc:aa. Authors: Amit K Verma / Robbert Q Kim / Dirk A Lamprecht / Clara Aguilar-Pérez / Sarah Wong / Nicolas Veziris / Alexandra Aubry / José M Bartolomé-Nebreda / Rodrigo J Carbajo / Jennefer Wetzel / ...Authors: Amit K Verma / Robbert Q Kim / Dirk A Lamprecht / Clara Aguilar-Pérez / Sarah Wong / Nicolas Veziris / Alexandra Aubry / José M Bartolomé-Nebreda / Rodrigo J Carbajo / Jennefer Wetzel / Meindert H Lamers / Abstract: Drug-resistant tuberculosis (TB) continues to challenge treatment options, necessitating the exploration of new compounds of novel targets. The mycobacterial respiratory complex cytochrome bc:aa has ...Drug-resistant tuberculosis (TB) continues to challenge treatment options, necessitating the exploration of new compounds of novel targets. The mycobacterial respiratory complex cytochrome bc:aa has emerged as a promising target, exemplified by the success of first-in-class inhibitor Q203 in phase 2 clinical trials. However, to fully exploit the potential of this target and to identify the best-in-class inhibitor more compounds need evaluation. Here, we introduce JNJ-2901, a novel Q203 analogue, that demonstrates activity against multidrug-resistant clinical strains at sub-nanomolar concentration and 4-log reduction in bacterial burden in a mouse model of TB infection. Inhibitory studies on purified enzymes validate the nanomolar inhibitions observed in mycobacterial cells. Additionally, cryo-EM structure analysis of cytochrome bc:aa bound to JNJ-2901 reveals the binding pocket at the menaquinol oxidation site (Qp), akin to other substate analogue inhibitors like Q203 and TB47. Validation of the binding site is further achieved by generating and isolating the JNJ-2901 resistant mutations in , followed by purification and resistance analysis of the resistant cytochrome bc:aa complex. Our comprehensive work lays the foundation for further clinical validations of JNJ-2901.
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