Structure-Activity Relationships of cyclo(l-Tyrosyl-l-tyrosine) Derivatives Binding to Mycobacterium tuberculosis CYP121: Iodinated Analogues Promote Shift to High-Spin Adduct

Sunnia Rajput, Kirsty J McLean, Harshwardhan Poddar, Irwin R Selvam, Gayathri Nagalingam, James A Triccas, Colin W Levy, Andrew W Munro, Craig A Hutton

Research output: Contribution to journalArticlepeer-review

Abstract

A series of analogues of cyclo(l-tyrosyl-l-tyrosine), the substrate of the Mycobacterium tuberculosis enzyme CYP121, have been synthesized and analyzed by UV-vis and electron paramagnetic resonance spectroscopy and by X-ray crystallography. The introduction of iodine substituents onto cyclo(l-tyrosyl-l-tyrosine) results in sub-μM binding affinity for the CYP121 enzyme and a complete shift to the high-spin state of the heme FeIII. The introduction of halogens that are able to interact with heme groups is thus a feasible approach to the development of next-generation, tight binding inhibitors of the CYP121 enzyme, in the search for novel antitubercular compounds.

Original languageEnglish
Article numberdoi: 10.1021/acs.jmedchem.9b01199
Pages (from-to)9792-9805
Number of pages14
JournalJournal of Medicinal Chemistry
Volume62
Issue number21
Early online date16 Oct 2019
DOIs
Publication statusPublished - 2019

Keywords

  • Mycobacterium tuberculosis
  • cytochrome P450
  • CYP121
  • iodinated analogues
  • heme interactions
  • tight binding compounds
  • EPR spectroscopy
  • protein crystallography

Research Beacons, Institutes and Platforms

  • Biotechnology
  • Manchester Institute of Biotechnology

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