2 research outputs found
A Cooperative Mechanism of Clotrimazoles in P450 Revealed by the Dissociation Picture of Clotrimazole from P450
The
dissociation processes of clotrimazole (CLT) in several models
are comparatively investigated by molecular dynamics simulations to
explore the cooperative mechanism of clotrimazoles in P450. Our results
suggest that when P450 only accommodates the active CLT (CLT1), CLT1
continually diffuses away from heme, and the partial BC loop (residues
73β88) and the extended FG loop (residues 173β186) first
close and then open. When the enzyme binds to two CLT molecules, CLT1
basically keeps close to heme, and the partial BC loop and the extended
FG loop move close to each other. Clearly, the effector CLT (CLT2)
plays a cooperative role in the inhibition of CLT1 on P450. CLT2 restrains
the dissociation of CLT1 first through direct ΟβΟ
stacking interactions and then through the rearranged binding site
induced by CLT2. The presence of CLT1 can help to stabilize the protein
structure around CLT2 by interacting with M86, Q173, and M174