6533b839fe1ef96bd12a64f7
RESEARCH PRODUCT
All-Atom simulations disclose how cytochrome reductase reshapes the substrate access/egress routes of its partner cyp450s
Andrea SaltalamacchiaIda RitaccoAngelo SpinelloAlessandra MagistratoEmiliano Ippolitisubject
CytochromeStereochemistryeducationPlasma protein binding-ReductaseMolecular Dynamics Simulation010402 general chemistry01 natural sciencesSubstrate SpecificityElectron Transport03 medical and health sciencesAromataseCytochrome P-450 Enzyme Systemhealth services administrationHumansddc:530General Materials Sciencecardiovascular diseasesP450 EnzymesPhysical and Theoretical Chemistryhealth care economics and organizations030304 developmental biologyNADPH-Ferrihemoprotein Reductase0303 health sciencesOxidative metabolismbiologyChemistrySubstrate (chemistry)Cytochrome P450 reductaseElectron transport chain0104 chemical sciencesAromatase; Cytochrome P-450 Enzyme System; Electron Transport; Humans; Molecular Dynamics Simulation; NADPH-Ferrihemoprotein Reductase; Protein Binding; Substrate SpecificitySettore CHIM/03 - Chimica Generale E Inorganicabiology.proteintherapeuticsProtein Bindingdescription
Cytochromes P450 enzymes (CYP450s) promote the oxidative metabolism of a variety of substrates via the electrons supplied by the cytochrome P450 reductase (CPR) and upon formation of a CPR/CYP450 adduct. In spite of the pivotal regulatory importance of this process, the impact of CPR binding on the functional properties of its partner CYP450 remains elusive. By performing multiple microsecond-long all-Atom molecular dynamics simulations of a 520â »000-Atom model of a CPR/CYP450 adduct embedded in a membrane mimic, we disclose the molecular terms for their interactions, considering the aromatase (HA) enzyme as a proxy of the CYP450 family. Our study strikingly unveils that CPR binding alters HA's functional motions, bolstering a change in the shape and type of the channels traveled by substrates/products during their access/egress to/from the enzyme's active site. Our outcomes unprecedentedly contribute to extricate the many entangled facets of the CYP450 metabolon, redrafting its intricate panorama from an atomic-level perspective.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-27 |