Activation of Platinum(IV) Prodrugs by Cytochrome c and Characterization of the Protein Binding Sites.

Abstract:

:Platinum(IV) complexes generally require reduction to reactive Pt(II) species to exert their chemotherapeutic activity. The process of reductive activation of (15)N-labeled (OC-6-43)-bis(acetato)diamminedichloridoplatinum(IV), in the presence of nicotinamide adenine dinucleotide (NADH) and horse heart cytochrome c (cyt c), was monitored by (1)H,(15)N-HSQC NMR spectroscopy and protein digestion experiments. It has been shown that cyt c plays a catalytic role in the transfer of two reducing equivalents from NADH to Pt(IV) species. Noncovalent interactions between reduced monoaqua cisplatin (cis-[PtCl((15)NH3)2(H2O)](+)) and the protein, in the proximity of the heme cofactor, and also covalent binding of platinum to the protein region around Met65 and Met80 take place.

journal_name

Mol Pharm

journal_title

Molecular pharmaceutics

authors

Lasorsa A,Stuchlíková O,Brabec V,Natile G,Arnesano F

doi

10.1021/acs.molpharmaceut.6b00438

subject

Has Abstract

pub_date

2016-09-06 00:00:00

pages

3216-23

issue

9

eissn

1543-8384

issn

1543-8392

pii

10.1021/acs.molpharmaceut.6b00438

journal_volume

13

pub_type

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