[EN] 1,4-QUINONES AND THEIR SULFUR ANALOGUES USEFUL AS LIGANDS OF N-ACETYLTRANSFERASES [FR] 1,4-QUINONES ET LEURS ANALOGUES SOUFRÉS UTILES EN TANT QUE LIGANDS DE N-ACÉTYLTRANSFÉRASES
Structure–activity relationships and colorimetric properties of specific probes for the putative cancer biomarker human arylamine N-acetyltransferase 1
摘要:
A naphthoquinone inhibitor of human arylamine N-acetyltransferase 1 (hNAT1), a potential cancer biomarker and therapeutic target, has been reported which undergoes a distinctive concomitant color change from red to blue upon binding to the enzyme. Here we describe the use of in silico modeling alongside structure-activity relationship studies to advance the hit compound towards a potential probe to quantify hNAT1 levels in tissues. Derivatives with both a fifty-fold higher potency against hNAT1 and a two-fold greater absorption coefficient compared to the initial hit have been synthesized; these compounds retain specificity for hNAT1 and its murine homologue mNat2 over the isoenzyme hNAT2. A relationship between pK(a), inhibitor potency and colorimetric properties has also been uncovered. The high potency of representative examples against hNAT1 in ZR-75-1 cell extracts also paves the way for the development of inhibitors with improved intrinsic sensitivity which could enable detection of hNAT1 in tissue samples and potentially act as tools for elucidating the unknown role hNAT1 plays in ER+ breast cancer; this could in turn lead to a therapeutic use for such inhibitors. (C) 2014 Published by Elsevier Ltd.
Small Molecule Colorimetric Probes for Specific Detection of Human Arylamine <i>N</i>-Acetyltransferase 1, a Potential Breast Cancer Biomarker
作者:Nicola Laurieri、Matthew H. J. Crawford、Akane Kawamura、Isaac M. Westwood、James Robinson、Ai M. Fletcher、Stephen G. Davies、Edith Sim、Angela J. Russell
DOI:10.1021/ja909165u
日期:2010.3.17
The identification, synthesis, and evaluation of a series of naphthoquinone derivatives as selective inhibitors of human arylamine N-acetyltransferase 1 and mouse arylamine N-acetyltransferase 2 are described. The compounds undergo a distinctive color change (red -> blue) upon binding to these human and mouse NAT isoenzymes driven by a proton transfer event. No color change is observed in the presence of functionally distinct but highly similar isoenzymes which are >70% identical. These molecules may be used as sensors to detect the presence of human NAT1 in cell lysates.
Structure–activity relationships and colorimetric properties of specific probes for the putative cancer biomarker human arylamine N-acetyltransferase 1
作者:James E. Egleton、Cyrille C. Thinnes、Peter T. Seden、Nicola Laurieri、Siu Po Lee、Kate S. Hadavizadeh、Angelina R. Measures、Alan M. Jones、Sam Thompson、Amy Varney、Graham M. Wynne、Ali Ryan、Edith Sim、Angela J. Russell
DOI:10.1016/j.bmc.2014.03.015
日期:2014.6
A naphthoquinone inhibitor of human arylamine N-acetyltransferase 1 (hNAT1), a potential cancer biomarker and therapeutic target, has been reported which undergoes a distinctive concomitant color change from red to blue upon binding to the enzyme. Here we describe the use of in silico modeling alongside structure-activity relationship studies to advance the hit compound towards a potential probe to quantify hNAT1 levels in tissues. Derivatives with both a fifty-fold higher potency against hNAT1 and a two-fold greater absorption coefficient compared to the initial hit have been synthesized; these compounds retain specificity for hNAT1 and its murine homologue mNat2 over the isoenzyme hNAT2. A relationship between pK(a), inhibitor potency and colorimetric properties has also been uncovered. The high potency of representative examples against hNAT1 in ZR-75-1 cell extracts also paves the way for the development of inhibitors with improved intrinsic sensitivity which could enable detection of hNAT1 in tissue samples and potentially act as tools for elucidating the unknown role hNAT1 plays in ER+ breast cancer; this could in turn lead to a therapeutic use for such inhibitors. (C) 2014 Published by Elsevier Ltd.
[EN] 1,4-QUINONES AND THEIR SULFUR ANALOGUES USEFUL AS LIGANDS OF N-ACETYLTRANSFERASES<br/>[FR] 1,4-QUINONES ET LEURS ANALOGUES SOUFRÉS UTILES EN TANT QUE LIGANDS DE N-ACÉTYLTRANSFÉRASES