Non-charged thiamine analogs as inhibitors of enzyme transketolase
作者:Allen A. Thomas、J. De Meese、Y. Le Huerou、Steven A. Boyd、Todd T. Romoff、Steven S. Gonzales、Indrani Gunawardana、Tomas Kaplan、Francis Sullivan、Kevin Condroski、Joseph P. Lyssikatos、Thomas D. Aicher、Josh Ballard、Bryan Bernat、Walter DeWolf、May Han、Christine Lemieux、Darin Smith、Solly Weiler、S. Kirk Wright、Guy Vigers、Barb Brandhuber
DOI:10.1016/j.bmcl.2007.11.098
日期:2008.1
Inhibition of the thiamine-utilizing enzyme transketolase (TK) has been linked with diminished tumor cell proliferation. Most thiamine antagonists have a permanent positive charge on the B-ring, and it has been suggested that this charge is required for diphosphorylation by thiamine pyrophosphokinase (TPPK) and binding to TK. We sought to make neutral thiazolium replacements that would be substrates for TPPK, while not necessarily needing thiamine transporters (ThTr1 and ThTr2) for cell penetration. The synthesis, SAR, and structure-based rationale for highly potent non-thiazolium TK antagonists are presented. (c) 2007 Elsevier Ltd. All rights reserved.
A cross-kingdom Nudix enzyme that pre-empts damage in thiamin metabolism
作者:Aymeric Goyer、Ghulam Hasnain、Océane Frelin、Maria A. Ralat、Jesse F. Gregory、Andrew D. Hanson
DOI:10.1042/bj20130516
日期:2013.9.15
Genes specifying the thiamin monophosphate phosphatase and adenylated thiazole diphosphatase steps in fungal and plant thiaminbiosynthesis remain unknown, as do genes for ThDP (thiamin diphosphate) hydrolysis in thiamin metabolism. A distinctive Nudix domain fused to Tnr3 (thiamin diphosphokinase) in Schizosaccharomyces pombe was evaluated as a candidate for these functions. Comparative genomic analysis